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<!-- DFS ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfsco.com/financial-services/ -->
<!-- Creation Date      : 2019-02-13T17:43:14.2722138+00:00 -->
<!-- Version            : 3.3.6957.35136 -->
<!-- Package ID         : de738368486a41dbb29ecfb84aeaba9e -->
<!-- Copyright (c) 2019 Donnelley Financial, LLC. All Rights Reserved. -->
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    <label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets Current</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetIncludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill and intangible assets</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositsAssetsNoncurrent" xlink:type="locator" xlink:label="us-gaap_DepositsAssetsNoncurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_DepositsAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits on equipment purchases</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_DepositsAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits Assets Noncurrent</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsNetNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets, net</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsNetNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Net Noncurrent</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets Noncurrent</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:type="locator" xlink:label="us-gaap_Assets" />
    <label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIABILITIES AND STOCKHOLDERS&#8217; EQUITY</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities And Stockholders Equity [Abstract]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities:</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Current [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsPayableCurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable Current</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedIncomeTaxesCurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccruedIncomeTaxesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal and state income taxes payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedIncomeTaxesCurrent" xlink:to="us-gaap_AccruedIncomeTaxesCurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccruedIncomeTaxesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Income Taxes Current</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedLiabilitiesCurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesCurrent" xlink:to="us-gaap_AccruedLiabilitiesCurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities Current</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Current</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermLineOfCredit" xlink:type="locator" xlink:label="us-gaap_LongTermLineOfCredit" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermLineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Borrowings under revolving credit facility</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_LongTermLineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Line Of Credit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:type="locator" xlink:label="us-gaap_LongTermDebtNoncurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt, net of debt discount and issuance costs of $5,795 and $1,217 at December 31, 2018 and 2017, respectively</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Noncurrent</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:type="locator" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax liabilities, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:to="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Noncurrent</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:type="locator" xlink:label="us-gaap_OtherLiabilitiesNoncurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="us-gaap_OtherLiabilitiesNoncurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities Noncurrent</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Liabilities" xlink:type="locator" xlink:label="us-gaap_Liabilities" />
    <label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (see Note 9)</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; equity:</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockValue" xlink:type="locator" xlink:label="us-gaap_PreferredStockValue" />
    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value $.01; authorized 1,000,000 shares, no shares issued</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Value</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Value</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained earnings</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income Loss Net Of Tax</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockValue" xlink:type="locator" xlink:label="us-gaap_TreasuryStockValue" />
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Treasury stock, at cost, 53,701,096 shares and 43,802,611 shares at December 31, 2018 and 2017, respectively</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockValue" xlink:to="us-gaap_TreasuryStockValue_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Value</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:type="locator" xlink:label="us-gaap_StockholdersEquity" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders&#8217; equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" />
    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders&#8217; equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities And Stockholders Equity</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:type="locator" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable, allowance for doubtful accounts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts Receivable Current</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt, debt discount and issuance costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:type="locator" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" />
    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Par Or Stated Value Per Share</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesAuthorized" />
    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Authorized</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesIssued" />
    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Issued</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="locator" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Par Or Stated Value Per Share</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesAuthorized" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Authorized</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesOutstanding" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Outstanding</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockShares" xlink:type="locator" xlink:label="us-gaap_TreasuryStockShares" />
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury stock, shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockShares" xlink:to="us-gaap_TreasuryStockShares_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Shares</label>
    <loc xlink:href="pten-20181231.xsd#pten_DepreciationDepletionAmortizationAndImpairment" xlink:type="locator" xlink:label="pten_DepreciationDepletionAmortizationAndImpairment" />
    <label xml:lang="en-US" xlink:label="pten_DepreciationDepletionAmortizationAndImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Depreciation depletion amortization and impairment.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DepreciationDepletionAmortizationAndImpairment" xlink:to="pten_DepreciationDepletionAmortizationAndImpairment_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:type="locator" xlink:label="us-gaap_StatementTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:type="locator" xlink:label="us-gaap_StatementBusinessSegmentsAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Business Segments [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:type="locator" xlink:label="us-gaap_SegmentDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_SegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_SegmentDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_ContractDrillingMember" xlink:type="locator" xlink:label="pten_ContractDrillingMember" />
    <label xml:lang="en-US" xlink:label="pten_ContractDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract Drilling</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ContractDrillingMember" xlink:to="pten_ContractDrillingMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ContractDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract Drilling</label>
    <label xml:lang="en-US" xlink:label="pten_ContractDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract Drilling [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_PressurePumpingMember" xlink:type="locator" xlink:label="pten_PressurePumpingMember" />
    <label xml:lang="en-US" xlink:label="pten_PressurePumpingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Pressure pumping.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PressurePumpingMember" xlink:to="pten_PressurePumpingMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_PressurePumpingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pressure Pumping</label>
    <label xml:lang="en-US" xlink:label="pten_PressurePumpingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pressure Pumping [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_DirectionalDrillingMember" xlink:type="locator" xlink:label="pten_DirectionalDrillingMember" />
    <label xml:lang="en-US" xlink:label="pten_DirectionalDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Directional drilling.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DirectionalDrillingMember" xlink:to="pten_DirectionalDrillingMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_DirectionalDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Directional Drilling</label>
    <label xml:lang="en-US" xlink:label="pten_DirectionalDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Directional Drilling [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_OtherMember" xlink:type="locator" xlink:label="pten_OtherMember" />
    <label xml:lang="en-US" xlink:label="pten_OtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_OtherMember" xlink:to="pten_OtherMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_OtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</label>
    <label xml:lang="en-US" xlink:label="pten_OtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenuesAbstract" xlink:type="locator" xlink:label="us-gaap_RevenuesAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating revenues:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="locator" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total operating revenues</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue From Contract With Customer Excluding Assessed Tax</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingCostsAndExpensesAbstract" xlink:type="locator" xlink:label="us-gaap_OperatingCostsAndExpensesAbstract" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="locator" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:type="locator" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" />
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    <label xml:lang="en-US" xlink:label="pten_RestrictedStockIssuedDuringPeriodSharesAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted stock issued for acquisition (in shares)</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:type="locator" xlink:label="us-gaap_DividendsCommonStockCash" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:type="locator" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod" />
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase of treasury stock</label>
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    <loc xlink:href="pten-20181231.xsd#pten_ReceivableFromPropertyAndEquipmentInsurance" xlink:type="locator" xlink:label="pten_ReceivableFromPropertyAndEquipmentInsurance" />
    <label xml:lang="en-US" xlink:label="pten_ReceivableFromPropertyAndEquipmentInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Receivable from property and equipment insurance.</label>
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    <loc xlink:href="pten-20181231.xsd#pten_IncreaseDecreaseInPayablesRelatedToPurchasesOfPropertyAndEquipment" xlink:type="locator" xlink:label="pten_IncreaseDecreaseInPayablesRelatedToPurchasesOfPropertyAndEquipment" />
    <label xml:lang="en-US" xlink:label="pten_IncreaseDecreaseInPayablesRelatedToPurchasesOfPropertyAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase (Decrease) in Payables Related to Purchases of Property and Equipment.</label>
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    <loc xlink:href="pten-20181231.xsd#pten_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssuedValue" xlink:type="locator" xlink:label="pten_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssuedValue" />
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    <loc xlink:href="pten-20181231.xsd#pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases" xlink:type="locator" xlink:label="pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases" />
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    <loc xlink:href="pten-20181231.xsd#pten_CashPaidRefundedDuringPeriodForAbstract" xlink:type="locator" xlink:label="pten_CashPaidRefundedDuringPeriodForAbstract" />
    <label xml:lang="en-US" xlink:label="pten_CashPaidRefundedDuringPeriodForAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash paid refunded during period for.</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Cash Flows [Abstract]</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net income (loss) to net cash provided by operating activities:</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExplorationAbandonmentAndImpairmentExpense" xlink:type="locator" xlink:label="us-gaap_ExplorationAbandonmentAndImpairmentExpense" />
    <label xml:lang="en-US" xlink:label="us-gaap_ExplorationAbandonmentAndImpairmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dry holes and abandonments</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ExplorationAbandonmentAndImpairmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Exploration Abandonment And Impairment Expense</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income tax benefit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Income Tax Expense Benefit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensation" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" />
    <label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net gain on asset disposals</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:to="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Sale Of Property Plant Equipment</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:type="locator" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" />
    <label xml:lang="en-US" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Tax expense related to stock-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:to="us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Excess Tax Benefit From Share Based Compensation Operating Activities</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:type="locator" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts" />
    <label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt discount and issuance costs</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Financing Costs And Discounts</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities:</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Operating Capital [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accounts Receivable</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income taxes receivable/payable</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInventoriesAndOtherOperatingAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInInventoriesAndOtherOperatingAssets" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInventoriesAndOtherOperatingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Inventory and other assets</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInventoriesAndOtherOperatingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Inventories And Other Operating Assets</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accounts Payable</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of property and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Property Plant And Equipment</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from disposal of assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:to="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Property Plant And Equipment</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromCollectionOfNotesReceivable" xlink:type="locator" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collection of note receivable</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Collection Of Notes Receivable</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireOtherInvestments" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireOtherInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireOtherInvestments" xlink:to="us-gaap_PaymentsToAcquireOtherInvestments_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireOtherInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Other Investments</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in investing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Investing Activities</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Financing Activities [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from equity offering</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:to="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Or Sale Of Equity</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:type="locator" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of treasury stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Repurchase Of Common Stock</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:type="locator" xlink:label="us-gaap_PaymentsOfDividends" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends paid</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDividends" xlink:to="us-gaap_PaymentsOfDividends_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments Of Dividends</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Long Term Debt</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:type="locator" xlink:label="us-gaap_RepaymentsOfLongTermDebt" />
    <label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLongTermDebt" xlink:to="us-gaap_RepaymentsOfLongTermDebt_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Repayments Of Long Term Debt</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:type="locator" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from borrowings under revolving credit facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:to="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Long Term Lines Of Credit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit" xlink:type="locator" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit" />
    <label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of borrowings under revolving credit facility</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Repayments Of Long Term Lines Of Credit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:type="locator" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Debt issuance costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments Of Debt Issuance Costs</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_ProceedsFromStockOptionsExercised" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from exercise of stock options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromStockOptionsExercised" xlink:to="us-gaap_ProceedsFromStockOptionsExercised_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Stock Options Exercised</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by (used in) financing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Financing Activities</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:type="locator" xlink:label="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" />
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    <label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash and cash equivalents at beginning of year</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosure of cash flow information:</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Activity Table [Text Block]</label>
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    <label xml:lang="en-US" xlink:label="pten_ScheduleOfAdditionalNonvestedOptionsActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of additional nonvested options activity.</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquipmentMember" xlink:type="locator" xlink:label="us-gaap_EquipmentMember" />
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    <label xml:lang="en-US" xlink:label="us-gaap_EquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equipment [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BuildingMember" xlink:type="locator" xlink:label="us-gaap_BuildingMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Buildings</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Building [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentOtherTypesMember" xlink:to="us-gaap_PropertyPlantAndEquipmentOtherTypesMember_lbl" />
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    <label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</label>
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    <label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</label>
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    <loc xlink:href="pten-20181231.xsd#pten_APEXClassRigsMember" xlink:type="locator" xlink:label="pten_APEXClassRigsMember" />
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    <label xml:lang="en-US" xlink:label="pten_NumberOfRigs_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of rigs.</label>
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    <loc xlink:href="pten-20181231.xsd#pten_NumberOfHorsepowerOfFracturingEquipment" xlink:type="locator" xlink:label="pten_NumberOfHorsepowerOfFracturingEquipment" />
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    <label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionSharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Company common stock price</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1" />
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    <label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Pro Forma Earnings Per Share Diluted</label>
    <loc xlink:href="pten-20181231.xsd#pten_AccountsReceivablePaymentTerms" xlink:type="locator" xlink:label="pten_AccountsReceivablePaymentTerms" />
    <label xml:lang="en-US" xlink:label="pten_AccountsReceivablePaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accounts receivable payment terms.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AccountsReceivablePaymentTerms" xlink:to="pten_AccountsReceivablePaymentTerms_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="us-gaap_DisaggregationOfRevenueTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:type="locator" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments for New Accounting Pronouncements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:to="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments For New Accounting Pronouncements [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:type="locator" xlink:label="us-gaap_TypeOfAdoptionMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Type of Adoption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfAdoptionMember" xlink:to="us-gaap_TypeOfAdoptionMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type Of Adoption [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdate201409Member" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201409Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASC Topic 606 Revenue from Contracts with Customers</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdate201409Member" xlink:to="us-gaap_AccountingStandardsUpdate201409Member_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201409Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update201409 [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:type="locator" xlink:label="us-gaap_BalanceSheetLocationAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Balance Sheet Location [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:type="locator" xlink:label="us-gaap_BalanceSheetLocationDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_BalanceSheetLocationDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Balance Sheet Location [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_CustomerPaymentsMember" xlink:type="locator" xlink:label="pten_CustomerPaymentsMember" />
    <label xml:lang="en-US" xlink:label="pten_CustomerPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer payments.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CustomerPaymentsMember" xlink:to="pten_CustomerPaymentsMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_CustomerPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Payments</label>
    <label xml:lang="en-US" xlink:label="pten_CustomerPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Payments [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_CustomerPrepaymentsMember" xlink:type="locator" xlink:label="pten_CustomerPrepaymentsMember" />
    <label xml:lang="en-US" xlink:label="pten_CustomerPrepaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer prepayments.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CustomerPrepaymentsMember" xlink:to="pten_CustomerPrepaymentsMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_CustomerPrepaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Prepayments</label>
    <label xml:lang="en-US" xlink:label="pten_CustomerPrepaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Prepayments [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_DeferredMobilizationPaymentsMember" xlink:type="locator" xlink:label="pten_DeferredMobilizationPaymentsMember" />
    <label xml:lang="en-US" xlink:label="pten_DeferredMobilizationPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred mobilization payments.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DeferredMobilizationPaymentsMember" xlink:to="pten_DeferredMobilizationPaymentsMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_DeferredMobilizationPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Mobilization Payments</label>
    <label xml:lang="en-US" xlink:label="pten_DeferredMobilizationPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Mobilization Payments [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueLineItems" xlink:to="us-gaap_DisaggregationOfRevenueLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Line Items]</label>
    <label xml:lang="en-US" xlink:label="pten_AccountsReceivablePaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable payment terms</label>
    <label xml:lang="en-US" xlink:label="pten_AccountsReceivablePaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Payment Terms</label>
    <label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounts receivable balances</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase (decrease) in contract liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:to="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Contract With Customer Liability</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract liability balances included in accounts payable and accrued liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiabilityCurrent" xlink:to="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability Current</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis" xlink:type="locator" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis" xlink:to="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:type="locator" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance obligation original expected duration</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:to="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryNetAbstract" xlink:type="locator" xlink:label="us-gaap_InventoryNetAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Net [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNetAbstract" xlink:to="us-gaap_InventoryNetAbstract_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:type="locator" xlink:label="us-gaap_InventoryFinishedGoods" />
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finished goods</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryFinishedGoods" xlink:to="us-gaap_InventoryFinishedGoods_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Finished Goods</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:type="locator" xlink:label="us-gaap_InventoryWorkInProcess" />
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryWorkInProcess_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Work-in-process</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWorkInProcess" xlink:to="us-gaap_InventoryWorkInProcess_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryWorkInProcess_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Work In Process</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryRawMaterialsAndSupplies" xlink:type="locator" xlink:label="us-gaap_InventoryRawMaterialsAndSupplies" />
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryRawMaterialsAndSupplies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Raw materials and supplies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryRawMaterialsAndSupplies" xlink:to="us-gaap_InventoryRawMaterialsAndSupplies_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryRawMaterialsAndSupplies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Raw Materials And Supplies</label>
    <label xml:lang="en-US" xlink:label="us-gaap_InventoryNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Inventory</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OilAndGasPropertiesMember" xlink:type="locator" xlink:label="us-gaap_OilAndGasPropertiesMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_OilAndGasPropertiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Oil and natural gas properties</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OilAndGasPropertiesMember" xlink:to="us-gaap_OilAndGasPropertiesMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OilAndGasPropertiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Oil And Gas Properties [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LandMember" xlink:type="locator" xlink:label="us-gaap_LandMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_LandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LandMember" xlink:to="us-gaap_LandMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Land [Member]</label>
    <label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Property Plant And Equipment [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total property and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Gross</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less accumulated depreciation, depletion and impairment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</label>
    <label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment, net</label>
    <loc xlink:href="pten-20181231.xsd#pten_DepreciationAndImpairmentLosses" xlink:type="locator" xlink:label="pten_DepreciationAndImpairmentLosses" />
    <label xml:lang="en-US" xlink:label="pten_DepreciationAndImpairmentLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Depreciation and impairment losses.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DepreciationAndImpairmentLosses" xlink:to="pten_DepreciationAndImpairmentLosses_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_AmortizationExpenseOfIntangibleAssetsNetOfIntangibleLiabilities" xlink:type="locator" xlink:label="pten_AmortizationExpenseOfIntangibleAssetsNetOfIntangibleLiabilities" />
    <label xml:lang="en-US" xlink:label="pten_AmortizationExpenseOfIntangibleAssetsNetOfIntangibleLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization expense of intangible assets net of intangible liabilities.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AmortizationExpenseOfIntangibleAssetsNetOfIntangibleLiabilities" xlink:to="pten_AmortizationExpenseOfIntangibleAssetsNetOfIntangibleLiabilities_lbl" />
    <label xml:lang="en-US" xlink:label="pten_DepreciationAndImpairmentLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and impairment expense</label>
    <label xml:lang="en-US" xlink:label="pten_DepreciationAndImpairmentLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation And Impairment Losses</label>
    <label xml:lang="en-US" xlink:label="pten_AmortizationExpenseOfIntangibleAssetsNetOfIntangibleLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense</label>
    <label xml:lang="en-US" xlink:label="pten_AmortizationExpenseOfIntangibleAssetsNetOfIntangibleLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Expense Of Intangible Assets Net Of Intangible Liabilities</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Depletion" xlink:type="locator" xlink:label="us-gaap_Depletion" />
    <label xml:lang="en-US" xlink:label="us-gaap_Depletion_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depletion expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depletion" xlink:to="us-gaap_Depletion_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_Depletion_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depletion</label>
    <label xml:lang="en-US" xlink:label="pten_DepreciationDepletionAmortizationAndImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</label>
    <loc xlink:href="pten-20181231.xsd#pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember" xlink:type="locator" xlink:label="pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember" />
    <label xml:lang="en-US" xlink:label="pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Rigs and spare rig components that would no longer be marketed.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember" xlink:to="pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rigs and Spare Rig Components That Would No Longer Be Marketed</label>
    <label xml:lang="en-US" xlink:label="pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Rigs And Spare Rig Components That Would No Longer Be Marketed [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember" xlink:type="locator" xlink:label="pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember" />
    <label xml:lang="en-US" xlink:label="pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mechanical rigs that remain marketed but are not operating.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember" xlink:to="pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mechanically Powered Drilling Rigs That Remain Marketed But are Not Operating</label>
    <label xml:lang="en-US" xlink:label="pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mechanical Rigs That Remain Marketed But Are Not Operating [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_OilfieldRentalsMember" xlink:type="locator" xlink:label="pten_OilfieldRentalsMember" />
    <label xml:lang="en-US" xlink:label="pten_OilfieldRentalsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Oilfield rentals.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_OilfieldRentalsMember" xlink:to="pten_OilfieldRentalsMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_OilfieldRentalsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Oilfield Rentals</label>
    <label xml:lang="en-US" xlink:label="pten_OilfieldRentalsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Oilfield Rentals [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TangibleAssetImpairmentCharges" xlink:type="locator" xlink:label="us-gaap_TangibleAssetImpairmentCharges" />
    <label xml:lang="en-US" xlink:label="us-gaap_TangibleAssetImpairmentCharges_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment charge for the write-down of drilling equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TangibleAssetImpairmentCharges" xlink:to="us-gaap_TangibleAssetImpairmentCharges_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_TangibleAssetImpairmentCharges_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tangible Asset Impairment Charges</label>
    <loc xlink:href="pten-20181231.xsd#pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets" xlink:type="locator" xlink:label="pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets" />
    <label xml:lang="en-US" xlink:label="pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of long-lived assets.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets" xlink:to="pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets_lbl" />
    <label xml:lang="en-US" xlink:label="pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of asset groups</label>
    <label xml:lang="en-US" xlink:label="pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Excepted Cash Flows On Undiscounted Basis Exceeding Carrying Values Of Long Lived Assets</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfGoodwillTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfGoodwillTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Goodwill [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfGoodwillTable" xlink:to="us-gaap_ScheduleOfGoodwillTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfGoodwillTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Goodwill [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:type="locator" xlink:label="us-gaap_AllOtherSegmentsMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllOtherSegmentsMember" xlink:to="us-gaap_AllOtherSegmentsMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">All Other Segments [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillLineItems" xlink:type="locator" xlink:label="us-gaap_GoodwillLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillLineItems" xlink:to="us-gaap_GoodwillLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill [Line Items]</label>
    <label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of period</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:type="locator" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod" />
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill acquired</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillAcquiredDuringPeriod" xlink:to="us-gaap_GoodwillAcquiredDuringPeriod_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Acquired During Period</label>
    <label xml:lang="en-US" xlink:label="pten_IncreaseInGoodwillDueToMeasurementPeriodAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Measurement period adjustment</label>
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Impairment</label>
    <label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of period</label>
    <loc xlink:href="pten-20181231.xsd#pten_GoodwillAndIntangibleAssetsDisclosureLineItems" xlink:type="locator" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureLineItems" />
    <label xml:lang="en-US" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Goodwill and intangible assets disclosure.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_GoodwillAndIntangibleAssetsDisclosureLineItems" xlink:to="pten_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_GoodwillAndIntangibleAssetsDisclosureTable" xlink:type="locator" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureTable" />
    <label xml:lang="en-US" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Goodwill and intangible assets disclosure.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_GoodwillAndIntangibleAssetsDisclosureTable" xlink:to="pten_GoodwillAndIntangibleAssetsDisclosureTable_lbl" />
    <label xml:lang="en-US" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill And Intangible Assets Disclosure [Table]</label>
    <label xml:lang="en-US" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill And Intangible Assets Disclosure [Table]</label>
    <label xml:lang="en-US" xlink:label="pten_OilfieldRentalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Oilfield Rental</label>
    <loc xlink:href="pten-20181231.xsd#pten_PressurePumpingAndDirectionalDrillingMember" xlink:type="locator" xlink:label="pten_PressurePumpingAndDirectionalDrillingMember" />
    <label xml:lang="en-US" xlink:label="pten_PressurePumpingAndDirectionalDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Pressure Pumping and Directional Drilling.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PressurePumpingAndDirectionalDrillingMember" xlink:to="pten_PressurePumpingAndDirectionalDrillingMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_PressurePumpingAndDirectionalDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pressure Pumping and Directional Drilling</label>
    <label xml:lang="en-US" xlink:label="pten_PressurePumpingAndDirectionalDrillingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pressure Pumping And Directional Drilling [Member]</label>
    <label xml:lang="en-US" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill And Intangible Assets Disclosure [Line Items]</label>
    <label xml:lang="en-US" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill And Intangible Assets Disclosure [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:type="locator" xlink:label="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" />
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated impairment losses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:to="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Impaired Accumulated Impairment Loss</label>
    <loc xlink:href="pten-20181231.xsd#pten_PercentageFairValueExceedsCarryingValue" xlink:type="locator" xlink:label="pten_PercentageFairValueExceedsCarryingValue" />
    <label xml:lang="en-US" xlink:label="pten_PercentageFairValueExceedsCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage fair value exceeds carrying value.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PercentageFairValueExceedsCarryingValue" xlink:to="pten_PercentageFairValueExceedsCarryingValue_lbl" />
    <label xml:lang="en-US" xlink:label="pten_PercentageFairValueExceedsCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage fair value exceeds carrying values</label>
    <label xml:lang="en-US" xlink:label="pten_PercentageFairValueExceedsCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Fair Value Exceeds Carrying Value</label>
    <label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Goodwill impairment charge</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Acquired Finite Lived Intangible Asset By Major Class [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable" xlink:to="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Acquired Finite Lived Intangible Asset By Major Class [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:type="locator" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired Finite Lived Intangible Assets [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Acquired Finite Lived Intangible Assets [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" xlink:type="locator" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" />
    <label xml:lang="en-US" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" xlink:to="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impairment Of Intangible Assets Excluding Goodwill</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross" />
    <label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross Carrying Amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsGross" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Gross</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" />
    <label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated Amortization</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" />
    <label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2019</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" />
    <label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" />
    <label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
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    <label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="us-gaap_LongtermDebtTypeDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Domain]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:type="locator" xlink:label="us-gaap_LetterOfCreditMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter of Credit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LetterOfCreditMember" xlink:to="us-gaap_LetterOfCreditMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letter Of Credit [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_SwingLineFacilityMember" xlink:type="locator" xlink:label="pten_SwingLineFacilityMember" />
    <label xml:lang="en-US" xlink:label="pten_SwingLineFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Swing line facility.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SwingLineFacilityMember" xlink:to="pten_SwingLineFacilityMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_SwingLineFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Swing Line Facility</label>
    <label xml:lang="en-US" xlink:label="pten_SwingLineFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Swing Line Facility [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:type="locator" xlink:label="us-gaap_StatementScenarioAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementScenarioAxis" xlink:to="us-gaap_StatementScenarioAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Scenario [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:type="locator" xlink:label="us-gaap_ScenarioUnspecifiedDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario, Unspecified</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScenarioUnspecifiedDomain" xlink:to="us-gaap_ScenarioUnspecifiedDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scenario Unspecified [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_SubjectToCustomaryConditionsMember" xlink:type="locator" xlink:label="pten_SubjectToCustomaryConditionsMember" />
    <label xml:lang="en-US" xlink:label="pten_SubjectToCustomaryConditionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Subject to customary conditions.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SubjectToCustomaryConditionsMember" xlink:to="pten_SubjectToCustomaryConditionsMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_SubjectToCustomaryConditionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subject To Customary Conditions</label>
    <label xml:lang="en-US" xlink:label="pten_SubjectToCustomaryConditionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subject To Customary Conditions [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateAxis" xlink:type="locator" xlink:label="us-gaap_VariableRateAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateDomain" xlink:type="locator" xlink:label="us-gaap_VariableRateDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:type="locator" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">London Interbank Offered Rate (LIBOR)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:to="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">London Interbank Offered Rate L I B O R [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BaseRateMember" xlink:type="locator" xlink:label="us-gaap_BaseRateMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_BaseRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BaseRateMember" xlink:to="us-gaap_BaseRateMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_BaseRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Base Rate [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_ReimbursementAgreementMember" xlink:type="locator" xlink:label="pten_ReimbursementAgreementMember" />
    <label xml:lang="en-US" xlink:label="pten_ReimbursementAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Reimbursement agreement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ReimbursementAgreementMember" xlink:to="pten_ReimbursementAgreementMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ReimbursementAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reimbursement Agreement</label>
    <label xml:lang="en-US" xlink:label="pten_ReimbursementAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reimbursement Agreement [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityInitiationDate1" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityInitiationDate1" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityInitiationDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit agreement date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityInitiationDate1" xlink:to="us-gaap_LineOfCreditFacilityInitiationDate1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityInitiationDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Initiation Date1</label>
    <loc xlink:href="pten-20181231.xsd#pten_LineOfCreditFacilityAdditionalBorrowingCapacity" xlink:type="locator" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity" />
    <label xml:lang="en-US" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility additional borrowing capacity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LineOfCreditFacilityAdditionalBorrowingCapacity" xlink:to="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentNumberOfOptionalExtensionsToInitialMaturityDate" xlink:type="locator" xlink:label="pten_DebtInstrumentNumberOfOptionalExtensionsToInitialMaturityDate" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentNumberOfOptionalExtensionsToInitialMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument number of optional extensions to initial maturity date.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentNumberOfOptionalExtensionsToInitialMaturityDate" xlink:to="pten_DebtInstrumentNumberOfOptionalExtensionsToInitialMaturityDate_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentInitialMaturityDateOptionalExtensionPeriod" xlink:type="locator" xlink:label="pten_DebtInstrumentInitialMaturityDateOptionalExtensionPeriod" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentInitialMaturityDateOptionalExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument initial maturity date optional extension period.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentInitialMaturityDateOptionalExtensionPeriod" xlink:to="pten_DebtInstrumentInitialMaturityDateOptionalExtensionPeriod_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility, maximum borrowing capacity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maximum Borrowing Capacity</label>
    <label xml:lang="en-US" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility, additional borrowing capacity</label>
    <label xml:lang="en-US" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Additional Borrowing Capacity</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentMaturityDate" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt maturity date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Date</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentNumberOfOptionalExtensionsToInitialMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, number of optional extensions to initial maturity date</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentNumberOfOptionalExtensionsToInitialMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Number Of Optional Extensions To Initial Maturity Date</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentInitialMaturityDateOptionalExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Optional extension period of initial maturity date</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentInitialMaturityDateOptionalExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Initial Maturity Date Optional Extension Period</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, basis spread on variable rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Basis Spread On Variable Rate1</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeePercentage" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitment fee rate payable to lenders based on credit rating</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeePercentage_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Commitment Fee Percentage</label>
    <loc xlink:href="pten-20181231.xsd#pten_ConsolidatedDebtAsPercentageOfCapitalization" xlink:type="locator" xlink:label="pten_ConsolidatedDebtAsPercentageOfCapitalization" />
    <label xml:lang="en-US" xlink:label="pten_ConsolidatedDebtAsPercentageOfCapitalization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Consolidated debt as percentage of capitalization.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ConsolidatedDebtAsPercentageOfCapitalization" xlink:to="pten_ConsolidatedDebtAsPercentageOfCapitalization_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DebtServiceCoverageRatio" xlink:type="locator" xlink:label="pten_DebtServiceCoverageRatio" />
    <label xml:lang="en-US" xlink:label="pten_DebtServiceCoverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt service coverage ratio.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtServiceCoverageRatio" xlink:to="pten_DebtServiceCoverageRatio_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityCovenantTerms" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit agreement, financial covenant description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCovenantTerms" xlink:to="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Covenant Terms</label>
    <label xml:lang="en-US" xlink:label="pten_ConsolidatedDebtAsPercentageOfCapitalization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt to capitalization ratio, percentage the Company must not exceed at any time</label>
    <label xml:lang="en-US" xlink:label="pten_ConsolidatedDebtAsPercentageOfCapitalization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Debt As Percentage Of Capitalization</label>
    <label xml:lang="en-US" xlink:label="pten_DebtServiceCoverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt service coverage ratio</label>
    <label xml:lang="en-US" xlink:label="pten_DebtServiceCoverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Service Coverage Ratio</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCredit" xlink:type="locator" xlink:label="us-gaap_LineOfCredit" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit, amount outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:type="locator" xlink:label="us-gaap_LettersOfCreditOutstandingAmount" />
    <label xml:lang="en-US" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letters of credit outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LettersOfCreditOutstandingAmount" xlink:to="us-gaap_LettersOfCreditOutstandingAmount_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letters Of Credit Outstanding Amount</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit, available borrowing capacity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Remaining Borrowing Capacity</label>
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentSemiAnnualPaymentDateOne" xlink:type="locator" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateOne" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateOne_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument semi annual payment date one.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentSemiAnnualPaymentDateOne" xlink:to="pten_DebtInstrumentSemiAnnualPaymentDateOne_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentSemiAnnualPaymentDateTwo" xlink:type="locator" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateTwo" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument semi annual payment date two.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentSemiAnnualPaymentDateTwo" xlink:to="pten_DebtInstrumentSemiAnnualPaymentDateTwo_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember" xlink:type="locator" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember" />
    <label xml:lang="en-US" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A senior notes four point nine seven percent due October five twenty twenty.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember" xlink:to="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">4.97% Series A Senior Notes, Due October 5th 2020</label>
    <label xml:lang="en-US" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Series A Senior Notes Four Point Nine Seven Percent Due October Five Twenty Twenty [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember" xlink:type="locator" xlink:label="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember" />
    <label xml:lang="en-US" xlink:label="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Series B senior notes four point two seven percent due June fourteen twenty twenty two.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember" xlink:to="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">4.27% Series B Senior Notes, Due June 14th 2022</label>
    <label xml:lang="en-US" xlink:label="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Series B Senior Notes Four Point Two Seven Percent Due June Fourteen Twenty Twenty Two [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember" xlink:type="locator" xlink:label="pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember" />
    <label xml:lang="en-US" xlink:label="pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Three point nine five percent senior notes due January two thousand twenty eight.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember" xlink:to="pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">3.95% Senior Notes Due 2028</label>
    <label xml:lang="en-US" xlink:label="pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Three Point Nine Five Percent Senior Notes Due January Two Thousand Twenty Eight [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_PreviousTermLoanMember" xlink:type="locator" xlink:label="pten_PreviousTermLoanMember" />
    <label xml:lang="en-US" xlink:label="pten_PreviousTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Previous term loan.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PreviousTermLoanMember" xlink:to="pten_PreviousTermLoanMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_PreviousTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Previous Term Loan</label>
    <label xml:lang="en-US" xlink:label="pten_PreviousTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Previous Term Loan [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_PreviousCreditAgreementMember" xlink:type="locator" xlink:label="pten_PreviousCreditAgreementMember" />
    <label xml:lang="en-US" xlink:label="pten_PreviousCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Previous credit agreement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PreviousCreditAgreementMember" xlink:to="pten_PreviousCreditAgreementMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_PreviousCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Previous Credit Agreement</label>
    <label xml:lang="en-US" xlink:label="pten_PreviousCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Previous Credit Agreement [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentFaceAmount" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt, aggregate principal amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Face Amount</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt interest rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Stated Percentage</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateOne_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Semi-annual interest payment, first payment date</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateOne_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Semi Annual Payment Date One</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Semi-annual interest payment, second payment date</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentSemiAnnualPaymentDateTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Semi Annual Payment Date Two</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentIssuanceDate1" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentIssuanceDate1" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentIssuanceDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes issuance date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentIssuanceDate1" xlink:to="us-gaap_DebtInstrumentIssuanceDate1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentIssuanceDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Issuance Date1</label>
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentPrepaymentTerms" xlink:type="locator" xlink:label="pten_DebtInstrumentPrepaymentTerms" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentPrepaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument prepayment terms.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentPrepaymentTerms" xlink:to="pten_DebtInstrumentPrepaymentTerms_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentAcceptanceTerms" xlink:type="locator" xlink:label="pten_DebtInstrumentAcceptanceTerms" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentAcceptanceTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument acceptance terms.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentAcceptanceTerms" xlink:to="pten_DebtInstrumentAcceptanceTerms_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentPrepaymentPercentageOfAggregatePrincipalAmount" xlink:type="locator" xlink:label="pten_DebtInstrumentPrepaymentPercentageOfAggregatePrincipalAmount" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentPrepaymentPercentageOfAggregatePrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument prepayment percentage of aggregate principal amount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentPrepaymentPercentageOfAggregatePrincipalAmount" xlink:to="pten_DebtInstrumentPrepaymentPercentageOfAggregatePrincipalAmount_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_PercentageOfRepurchasePriceToPrincipalDebtAmount" xlink:type="locator" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount" />
    <label xml:lang="en-US" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of repurchase price to principal debt amount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount" xlink:to="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentPrepaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of the prepayment terms</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentPrepaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Prepayment Terms</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentPrepaymentPercentageOfAggregatePrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, prepayment percentage of aggregate principal amount</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentPrepaymentPercentageOfAggregatePrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Prepayment Percentage Of Aggregate Principal Amount</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentage" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, redemption percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:to="us-gaap_DebtInstrumentRedemptionPricePercentage_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Redemption Price Percentage</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentAcceptanceTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of the acceptance terms</label>
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentAcceptanceTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Acceptance Terms</label>
    <label xml:lang="en-US" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acceptance terms, percent of principal before accrued and unpaid interest</label>
    <label xml:lang="en-US" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Repurchase Price To Principal Debt Amount</label>
    <loc xlink:href="pten-20181231.xsd#pten_NumberOfCovenants" xlink:type="locator" xlink:label="pten_NumberOfCovenants" />
    <label xml:lang="en-US" xlink:label="pten_NumberOfCovenants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of covenants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_NumberOfCovenants" xlink:to="pten_NumberOfCovenants_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_InterestCoverageRatio" xlink:type="locator" xlink:label="pten_InterestCoverageRatio" />
    <label xml:lang="en-US" xlink:label="pten_InterestCoverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest coverage ratio.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InterestCoverageRatio" xlink:to="pten_InterestCoverageRatio_lbl" />
    <label xml:lang="en-US" xlink:label="pten_NumberOfCovenants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of compliance covenants</label>
    <label xml:lang="en-US" xlink:label="pten_NumberOfCovenants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Covenants</label>
    <label xml:lang="en-US" xlink:label="pten_InterestCoverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest coverage ratio that the Company must exceed on the last day of the fiscal quarter</label>
    <label xml:lang="en-US" xlink:label="pten_InterestCoverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Coverage Ratio</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCovenantDescription" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentCovenantDescription" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Note purchase agreement, financial covenant description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCovenantDescription" xlink:to="us-gaap_DebtInstrumentCovenantDescription_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Covenant Description</label>
    <label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Repayment of borrowings</label>
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from borrowings, before offering expenses</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentPaymentTerms" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentPaymentTerms" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt payment term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPaymentTerms" xlink:to="us-gaap_DebtInstrumentPaymentTerms_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Payment Terms</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionDescription" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentRedemptionDescription" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument redemption description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentRedemptionDescription" xlink:to="us-gaap_DebtInstrumentRedemptionDescription_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Redemption Description</label>
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControl" xlink:type="locator" xlink:label="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControl" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControl_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument redemption price percentage on change of control.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControl" xlink:to="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControl_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControlDescription" xlink:type="locator" xlink:label="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControlDescription" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControlDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument redemption price percentage on change of control, description.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControlDescription" xlink:to="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControlDescription_lbl" />
    <label xml:lang="en-US" xlink:label="pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControlDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument redemption upon the occurrence of change of control, description</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Finance Costs Net</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:type="locator" xlink:label="us-gaap_AmortizationOfFinancingCosts" />
    <label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense related to amortization of debt issuance costs</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:type="locator" xlink:label="us-gaap_PaymentsOfDebtExtinguishmentCosts" />
    <label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDebtExtinguishmentCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Early termination of term loan agreements</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2019</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Next Twelve Months</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Two</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Three</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Four</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Five</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal After Year Five</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebt" xlink:type="locator" xlink:label="us-gaap_LongTermDebt" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentsTable" xlink:type="locator" xlink:label="us-gaap_OtherCommitmentsTable" />
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsTable" xlink:to="us-gaap_OtherCommitmentsTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:type="locator" xlink:label="us-gaap_TitleOfIndividualAxis" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:type="locator" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" />
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    <loc xlink:href="pten-20181231.xsd#pten_SpecifiedEmployeesMember" xlink:type="locator" xlink:label="pten_SpecifiedEmployeesMember" />
    <label xml:lang="en-US" xlink:label="pten_SpecifiedEmployeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Specified employees.</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Commitments</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_ChangeInControlAgreementMember" xlink:type="locator" xlink:label="pten_ChangeInControlAgreementMember" />
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    <label xml:lang="en-US" xlink:label="pten_ChangeInControlAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Change In Control Agreement [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BoardOfDirectorsChairmanMember" xlink:type="locator" xlink:label="us-gaap_BoardOfDirectorsChairmanMember" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExecutiveVicePresidentMember" xlink:type="locator" xlink:label="us-gaap_ExecutiveVicePresidentMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_ExecutiveVicePresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Executive Vice President</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExecutiveVicePresidentMember" xlink:to="us-gaap_ExecutiveVicePresidentMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ExecutiveVicePresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Executive Vice President [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_EmploymentAgreementsMember" xlink:type="locator" xlink:label="pten_EmploymentAgreementsMember" />
    <label xml:lang="en-US" xlink:label="pten_EmploymentAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employment agreements.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EmploymentAgreementsMember" xlink:to="pten_EmploymentAgreementsMember_lbl" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChiefExecutiveOfficerMember" xlink:type="locator" xlink:label="us-gaap_ChiefExecutiveOfficerMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chief Executive Officer</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Chief Executive Officer [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_ChiefFinancialOfficerAndGeneralCounselAndPresidentMember" xlink:type="locator" xlink:label="pten_ChiefFinancialOfficerAndGeneralCounselAndPresidentMember" />
    <label xml:lang="en-US" xlink:label="pten_ChiefFinancialOfficerAndGeneralCounselAndPresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Chief financial officer, general counsel and president.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ChiefFinancialOfficerAndGeneralCounselAndPresidentMember" xlink:to="pten_ChiefFinancialOfficerAndGeneralCounselAndPresidentMember_lbl" />
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    <label xml:lang="en-US" xlink:label="pten_ChiefFinancialOfficerAndGeneralCounselAndPresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Chief Financial Officer And General Counsel And President [Member]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Letters of credit, collateral for retrospective premiums and retained losses</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:type="locator" xlink:label="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" />
    <label xml:lang="en-US" xlink:label="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments to purchase major equipment and investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:to="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Commitment Remaining Minimum Amount Committed</label>
    <loc xlink:href="pten-20181231.xsd#pten_AgreementExpireDescription" xlink:type="locator" xlink:label="pten_AgreementExpireDescription" />
    <label xml:lang="en-US" xlink:label="pten_AgreementExpireDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement expire description.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AgreementExpireDescription" xlink:to="pten_AgreementExpireDescription_lbl" />
    <label xml:lang="en-US" xlink:label="pten_AgreementExpireDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement expire description</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementExpireDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agreement Expire Description</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:type="locator" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" />
    <label xml:lang="en-US" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current obligation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:to="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unrecorded Unconditional Purchase Obligation Balance Sheet Amount</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary" xlink:type="locator" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary" />
    <label xml:lang="en-US" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase obligations for 2019</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary" xlink:to="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unrecorded Unconditional Purchase Obligation Balance On First Anniversary</label>
    <loc xlink:href="pten-20181231.xsd#pten_DeductiblePerOccurrenceForGeneralLiabilityInsurancePolicy" xlink:type="locator" xlink:label="pten_DeductiblePerOccurrenceForGeneralLiabilityInsurancePolicy" />
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForGeneralLiabilityInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deductible per occurrence for general liability insurance policy.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DeductiblePerOccurrenceForGeneralLiabilityInsurancePolicy" xlink:to="pten_DeductiblePerOccurrenceForGeneralLiabilityInsurancePolicy_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DeductiblePerOccurrenceForWorkersCompensationInsurancePolicy" xlink:type="locator" xlink:label="pten_DeductiblePerOccurrenceForWorkersCompensationInsurancePolicy" />
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForWorkersCompensationInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deductible per occurrence for workers&apos; compensation insurance policy.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DeductiblePerOccurrenceForWorkersCompensationInsurancePolicy" xlink:to="pten_DeductiblePerOccurrenceForWorkersCompensationInsurancePolicy_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DeductiblePerOccurrenceForAutomobileLiabilityInsurancePolicy" xlink:type="locator" xlink:label="pten_DeductiblePerOccurrenceForAutomobileLiabilityInsurancePolicy" />
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForAutomobileLiabilityInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deductible per occurrence for automobile liability insurance policy.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DeductiblePerOccurrenceForAutomobileLiabilityInsurancePolicy" xlink:to="pten_DeductiblePerOccurrenceForAutomobileLiabilityInsurancePolicy_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_DeductiblePerOccurrenceForEquipmentInsurancePolicy" xlink:type="locator" xlink:label="pten_DeductiblePerOccurrenceForEquipmentInsurancePolicy" />
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForEquipmentInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deductible per occurrence for equipment insurance policy.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DeductiblePerOccurrenceForEquipmentInsurancePolicy" xlink:to="pten_DeductiblePerOccurrenceForEquipmentInsurancePolicy_lbl" />
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForGeneralLiabilityInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General liability insurance policy, deductible per occurrence</label>
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForGeneralLiabilityInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deductible Per Occurrence For General Liability Insurance Policy</label>
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForWorkersCompensationInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Workers&apos; compensation insurance policy, deductible per occurrence</label>
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForWorkersCompensationInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deductible Per Occurrence For Workers Compensation Insurance Policy</label>
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForAutomobileLiabilityInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Automobile liability insurance policy, deductible per occurrence</label>
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForAutomobileLiabilityInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deductible Per Occurrence For Automobile Liability Insurance Policy</label>
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForEquipmentInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equipment insurance policy, deductible per occurrence</label>
    <label xml:lang="en-US" xlink:label="pten_DeductiblePerOccurrenceForEquipmentInsurancePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deductible Per Occurrence For Equipment Insurance Policy</label>
    <loc xlink:href="pten-20181231.xsd#pten_AgreementNewTermNotificationPeriod" xlink:type="locator" xlink:label="pten_AgreementNewTermNotificationPeriod" />
    <label xml:lang="en-US" xlink:label="pten_AgreementNewTermNotificationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement new term notification period.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AgreementNewTermNotificationPeriod" xlink:to="pten_AgreementNewTermNotificationPeriod_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_AgreementExtensionPeriod" xlink:type="locator" xlink:label="pten_AgreementExtensionPeriod" />
    <label xml:lang="en-US" xlink:label="pten_AgreementExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement extension period.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AgreementExtensionPeriod" xlink:to="pten_AgreementExtensionPeriod_lbl" />
    <label xml:lang="en-US" xlink:label="pten_AgreementExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Automatic renewal period</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agreement Extension Period</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementNewTermNotificationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New term notification period</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementNewTermNotificationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agreement New Term Notification Period</label>
    <loc xlink:href="pten-20181231.xsd#pten_EmployeeEntitlementRatioOnSumOfHighestSalaryAndAverageBonus" xlink:type="locator" xlink:label="pten_EmployeeEntitlementRatioOnSumOfHighestSalaryAndAverageBonus" />
    <label xml:lang="en-US" xlink:label="pten_EmployeeEntitlementRatioOnSumOfHighestSalaryAndAverageBonus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee entitlement ratio on sum of highest salary and average bonus.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EmployeeEntitlementRatioOnSumOfHighestSalaryAndAverageBonus" xlink:to="pten_EmployeeEntitlementRatioOnSumOfHighestSalaryAndAverageBonus_lbl" />
    <label xml:lang="en-US" xlink:label="pten_EmployeeEntitlementRatioOnSumOfHighestSalaryAndAverageBonus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee entitlement ratio</label>
    <label xml:lang="en-US" xlink:label="pten_EmployeeEntitlementRatioOnSumOfHighestSalaryAndAverageBonus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Entitlement Ratio On Sum Of Highest Salary And Average Bonus</label>
    <loc xlink:href="pten-20181231.xsd#pten_ContinuedCoverageEntitlementOfWelfarePlanPeriod" xlink:type="locator" xlink:label="pten_ContinuedCoverageEntitlementOfWelfarePlanPeriod" />
    <label xml:lang="en-US" xlink:label="pten_ContinuedCoverageEntitlementOfWelfarePlanPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Continued coverage entitlement of welfare plan period.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ContinuedCoverageEntitlementOfWelfarePlanPeriod" xlink:to="pten_ContinuedCoverageEntitlementOfWelfarePlanPeriod_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ContinuedCoverageEntitlementOfWelfarePlanPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Continued coverage entitlement of welfare plan period</label>
    <label xml:lang="en-US" xlink:label="pten_ContinuedCoverageEntitlementOfWelfarePlanPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Continued Coverage Entitlement Of Welfare Plan Period</label>
    <loc xlink:href="pten-20181231.xsd#pten_InitialAgreementTerm" xlink:type="locator" xlink:label="pten_InitialAgreementTerm" />
    <label xml:lang="en-US" xlink:label="pten_InitialAgreementTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Initial agreement term.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InitialAgreementTerm" xlink:to="pten_InitialAgreementTerm_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_AgreementTerminationNoticePeriod" xlink:type="locator" xlink:label="pten_AgreementTerminationNoticePeriod" />
    <label xml:lang="en-US" xlink:label="pten_AgreementTerminationNoticePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement termination notice period.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AgreementTerminationNoticePeriod" xlink:to="pten_AgreementTerminationNoticePeriod_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_AgreementTerminationDescription" xlink:type="locator" xlink:label="pten_AgreementTerminationDescription" />
    <label xml:lang="en-US" xlink:label="pten_AgreementTerminationDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement termination description.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AgreementTerminationDescription" xlink:to="pten_AgreementTerminationDescription_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InitialAgreementTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial agreement term</label>
    <label xml:lang="en-US" xlink:label="pten_InitialAgreementTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Initial Agreement Term</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementTerminationNoticePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement termination notice period</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementTerminationNoticePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agreement Termination Notice Period</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementTerminationDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement termination description</label>
    <label xml:lang="en-US" xlink:label="pten_AgreementTerminationDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agreement Termination Description</label>
    <loc xlink:href="pten-20181231.xsd#pten_EmployeeEntitlementRatioOnSumOfBaseSalaryAndAverageCashBonus" xlink:type="locator" xlink:label="pten_EmployeeEntitlementRatioOnSumOfBaseSalaryAndAverageCashBonus" />
    <label xml:lang="en-US" xlink:label="pten_EmployeeEntitlementRatioOnSumOfBaseSalaryAndAverageCashBonus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee entitlement ratio on sum of base salary and average cash bonus.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EmployeeEntitlementRatioOnSumOfBaseSalaryAndAverageCashBonus" xlink:to="pten_EmployeeEntitlementRatioOnSumOfBaseSalaryAndAverageCashBonus_lbl" />
    <label xml:lang="en-US" xlink:label="pten_EmployeeEntitlementRatioOnSumOfBaseSalaryAndAverageCashBonus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee entitlement ratio on sum of base salary and average cash bonus</label>
    <label xml:lang="en-US" xlink:label="pten_EmployeeEntitlementRatioOnSumOfBaseSalaryAndAverageCashBonus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Entitlement Ratio On Sum Of Base Salary And Average Cash Bonus</label>
    <loc xlink:href="pten-20181231.xsd#pten_AcceleratedVestingPeriodDescription" xlink:type="locator" xlink:label="pten_AcceleratedVestingPeriodDescription" />
    <label xml:lang="en-US" xlink:label="pten_AcceleratedVestingPeriodDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accelerated vesting period description.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AcceleratedVestingPeriodDescription" xlink:to="pten_AcceleratedVestingPeriodDescription_lbl" />
    <label xml:lang="en-US" xlink:label="pten_AcceleratedVestingPeriodDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accelerated vesting period description</label>
    <label xml:lang="en-US" xlink:label="pten_AcceleratedVestingPeriodDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accelerated Vesting Period Description</label>
    <loc xlink:href="pten-20181231.xsd#pten_PeriodConsideredForCalculatingAnnualCashBonusPayment" xlink:type="locator" xlink:label="pten_PeriodConsideredForCalculatingAnnualCashBonusPayment" />
    <label xml:lang="en-US" xlink:label="pten_PeriodConsideredForCalculatingAnnualCashBonusPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Period considered for calculating annual cash bonus payment.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PeriodConsideredForCalculatingAnnualCashBonusPayment" xlink:to="pten_PeriodConsideredForCalculatingAnnualCashBonusPayment_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_PeriodForSubsidizedBenefitContinuationCoverage" xlink:type="locator" xlink:label="pten_PeriodForSubsidizedBenefitContinuationCoverage" />
    <label xml:lang="en-US" xlink:label="pten_PeriodForSubsidizedBenefitContinuationCoverage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Period for subsidized benefit continuation coverage.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PeriodForSubsidizedBenefitContinuationCoverage" xlink:to="pten_PeriodForSubsidizedBenefitContinuationCoverage_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DescriptionOfPostemploymentBenefits" xlink:type="locator" xlink:label="us-gaap_DescriptionOfPostemploymentBenefits" />
    <label xml:lang="en-US" xlink:label="us-gaap_DescriptionOfPostemploymentBenefits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination benefits description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DescriptionOfPostemploymentBenefits" xlink:to="us-gaap_DescriptionOfPostemploymentBenefits_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DescriptionOfPostemploymentBenefits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Description Of Postemployment Benefits</label>
    <label xml:lang="en-US" xlink:label="pten_PeriodConsideredForCalculatingAnnualCashBonusPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Period considered for calculating annual cash bonus payment</label>
    <label xml:lang="en-US" xlink:label="pten_PeriodConsideredForCalculatingAnnualCashBonusPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Period Considered For Calculating Annual Cash Bonus Payment</label>
    <label xml:lang="en-US" xlink:label="pten_PeriodForSubsidizedBenefitContinuationCoverage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Period for subsidized benefit continuation coverage</label>
    <label xml:lang="en-US" xlink:label="pten_PeriodForSubsidizedBenefitContinuationCoverage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Period For Subsidized Benefit Continuation Coverage</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfStockByClassTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Stock By Class [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ScheduleOfStockByClassTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Stock By Class [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsAxis" xlink:type="locator" xlink:label="us-gaap_DividendsAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsAxis" xlink:to="us-gaap_DividendsAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsDomain" xlink:type="locator" xlink:label="us-gaap_DividendsDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsDomain" xlink:to="us-gaap_DividendsDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends [Domain]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendDeclaredMember" xlink:type="locator" xlink:label="us-gaap_DividendDeclaredMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendDeclaredMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend Declared</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendDeclaredMember" xlink:to="us-gaap_DividendDeclaredMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendDeclaredMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Declared [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis" xlink:type="locator" xlink:label="us-gaap_ShareRepurchaseProgramAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareRepurchaseProgramAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Repurchase Program</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareRepurchaseProgramAxis" xlink:to="us-gaap_ShareRepurchaseProgramAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareRepurchaseProgramAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain" xlink:type="locator" xlink:label="us-gaap_ShareRepurchaseProgramDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareRepurchaseProgramDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Repurchase Program</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareRepurchaseProgramDomain" xlink:to="us-gaap_ShareRepurchaseProgramDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareRepurchaseProgramDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_StockRepurchasePlanMember" xlink:type="locator" xlink:label="pten_StockRepurchasePlanMember" />
    <label xml:lang="en-US" xlink:label="pten_StockRepurchasePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock repurchase plan.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_StockRepurchasePlanMember" xlink:to="pten_StockRepurchasePlanMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_StockRepurchasePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2013 program</label>
    <label xml:lang="en-US" xlink:label="pten_StockRepurchasePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchase Plan [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:type="locator" xlink:label="us-gaap_ClassOfStockLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Stock [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfStockLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Stock [Line Items]</label>
    <label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock offering</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds from common stock offering</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Common Stock</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableTable" xlink:type="locator" xlink:label="us-gaap_DividendsPayableTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends Payable [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableTable" xlink:to="us-gaap_DividendsPayableTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable [Table]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentOneFiscalYearTwoThousandEighteenMember" xlink:type="locator" xlink:label="pten_InstallmentOneFiscalYearTwoThousandEighteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment one fiscal year two thousand eighteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentOneFiscalYearTwoThousandEighteenMember" xlink:to="pten_InstallmentOneFiscalYearTwoThousandEighteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 1, FY 2018</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment One Fiscal Year Two Thousand Eighteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentTwoFiscalYearTwoThousandEighteenMember" xlink:type="locator" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandEighteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment two fiscal year two thousand eighteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentTwoFiscalYearTwoThousandEighteenMember" xlink:to="pten_InstallmentTwoFiscalYearTwoThousandEighteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 2, FY 2018</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Two Fiscal Year Two Thousand Eighteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentThreeFiscalYearTwoThousandEighteenMember" xlink:type="locator" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandEighteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment three fiscal year two thousand eighteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentThreeFiscalYearTwoThousandEighteenMember" xlink:to="pten_InstallmentThreeFiscalYearTwoThousandEighteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 3, FY 2018</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Three Fiscal Year Two Thousand Eighteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentFourFiscalYearTwoThousandEighteenMember" xlink:type="locator" xlink:label="pten_InstallmentFourFiscalYearTwoThousandEighteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment four fiscal year two thousand eighteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentFourFiscalYearTwoThousandEighteenMember" xlink:to="pten_InstallmentFourFiscalYearTwoThousandEighteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 4, FY 2018</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Four Fiscal Year Two Thousand Eighteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentOneFiscalYearTwoThousandSeventeenMember" xlink:type="locator" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSeventeenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment one fiscal year two thousand seventeen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentOneFiscalYearTwoThousandSeventeenMember" xlink:to="pten_InstallmentOneFiscalYearTwoThousandSeventeenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 1, FY 2017</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment One Fiscal Year Two Thousand Seventeen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember" xlink:type="locator" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment two fiscal year two thousand seventeen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember" xlink:to="pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 2, FY 2017</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Two Fiscal Year Two Thousand Seventeen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember" xlink:type="locator" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment three fiscal year two thousand seventeen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember" xlink:to="pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 3, FY 2017</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Three Fiscal Year Two Thousand Seventeen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentFourFiscalYearTwoThousandSeventeenMember" xlink:type="locator" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSeventeenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment four fiscal year two thousand seventeen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentFourFiscalYearTwoThousandSeventeenMember" xlink:to="pten_InstallmentFourFiscalYearTwoThousandSeventeenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 4, FY 2017</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Four Fiscal Year Two Thousand Seventeen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentOneFiscalYearTwoThousandSixteenMember" xlink:type="locator" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSixteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment one fiscal year two thousand sixteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentOneFiscalYearTwoThousandSixteenMember" xlink:to="pten_InstallmentOneFiscalYearTwoThousandSixteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 1, FY 2016</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentOneFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment One Fiscal Year Two Thousand Sixteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentTwoFiscalYearTwoThousandSixteenMember" xlink:type="locator" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSixteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment two fiscal year two thousand sixteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentTwoFiscalYearTwoThousandSixteenMember" xlink:to="pten_InstallmentTwoFiscalYearTwoThousandSixteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 2, FY 2016</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentTwoFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Two Fiscal Year Two Thousand Sixteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentThreeFiscalYearTwoThousandSixteenMember" xlink:type="locator" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSixteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment three fiscal year two thousand sixteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentThreeFiscalYearTwoThousandSixteenMember" xlink:to="pten_InstallmentThreeFiscalYearTwoThousandSixteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 3, FY 2016</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentThreeFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Three Fiscal Year Two Thousand Sixteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_InstallmentFourFiscalYearTwoThousandSixteenMember" xlink:type="locator" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSixteenMember" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Installment four fiscal year two thousand sixteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InstallmentFourFiscalYearTwoThousandSixteenMember" xlink:to="pten_InstallmentFourFiscalYearTwoThousandSixteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installment 4, FY 2016</label>
    <label xml:lang="en-US" xlink:label="pten_InstallmentFourFiscalYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Installment Four Fiscal Year Two Thousand Sixteen [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableLineItems" xlink:type="locator" xlink:label="us-gaap_DividendsPayableLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends Payable [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableLineItems" xlink:to="us-gaap_DividendsPayableLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:type="locator" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash dividends paid, date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:to="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Payable Date To Be Paid Day Month And Year</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid" xlink:type="locator" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cash dividends paid, per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareCashPaid" xlink:to="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Dividends Per Share Cash Paid</label>
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash dividends paid</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" xlink:type="locator" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend declaration date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" xlink:to="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable Date Declared Day Month And Year</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:type="locator" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend per share, declared</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareDeclared" xlink:to="us-gaap_CommonStockDividendsPerShareDeclared_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Dividends Per Share Declared</label>
    <label xml:lang="en-US" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Dividend payment date</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:type="locator" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend record date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:to="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable Date Of Record Day Month And Year</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:type="locator" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount approved for repurchases under stock buyback program</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:to="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchase Program Authorized Amount1</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:type="locator" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining amount approved for repurchases under stock buyback program</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:to="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchase Program Remaining Authorized Repurchase Amount1</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfTreasuryStockTable" xlink:type="locator" xlink:label="us-gaap_ClassOfTreasuryStockTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_ClassOfTreasuryStockTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Treasury Stock [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfTreasuryStockTable" xlink:to="us-gaap_ClassOfTreasuryStockTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ClassOfTreasuryStockTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Treasury Stock [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_LongTermIncentivePlanMember" xlink:type="locator" xlink:label="pten_LongTermIncentivePlanMember" />
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Long term incentive plan.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LongTermIncentivePlanMember" xlink:to="pten_LongTermIncentivePlanMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long Term Incentive Plan</label>
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Incentive Plan [Member]</label>
    <label xml:lang="en-US" xlink:label="pten_StockRepurchasePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock Buyback Program</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityClassOfTreasuryStockLineItems" xlink:type="locator" xlink:label="us-gaap_EquityClassOfTreasuryStockLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_EquityClassOfTreasuryStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Treasury Stock [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityClassOfTreasuryStockLineItems" xlink:to="us-gaap_EquityClassOfTreasuryStockLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EquityClassOfTreasuryStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Class Of Treasury Stock [Line Items]</label>
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Treasury shares at beginning of period</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:type="locator" xlink:label="us-gaap_TreasuryStockSharesAcquired" />
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockSharesAcquired_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury stock acquired, shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockSharesAcquired" xlink:to="us-gaap_TreasuryStockSharesAcquired_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockSharesAcquired_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Shares Acquired</label>
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Treasury shares at end of period</label>
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Treasury shares at beginning of period</label>
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury stock acquired, cost</label>
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Treasury shares at end of period</label>
    <loc xlink:href="pten-20181231.xsd#pten_AmendmentAndRestatementOfTwentyFourteenPlanMember" xlink:type="locator" xlink:label="pten_AmendmentAndRestatementOfTwentyFourteenPlanMember" />
    <label xml:lang="en-US" xlink:label="pten_AmendmentAndRestatementOfTwentyFourteenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amendment and restatement of 2014 plan.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_AmendmentAndRestatementOfTwentyFourteenPlanMember" xlink:to="pten_AmendmentAndRestatementOfTwentyFourteenPlanMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_AmendmentAndRestatementOfTwentyFourteenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amended and Restated Plan</label>
    <label xml:lang="en-US" xlink:label="pten_AmendmentAndRestatementOfTwentyFourteenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment And Restatement Of Twenty Fourteen Plan [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_LongTermIncentivePlanTwentyFourteenMember" xlink:type="locator" xlink:label="pten_LongTermIncentivePlanTwentyFourteenMember" />
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanTwentyFourteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Long term incentive plan twenty fourteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LongTermIncentivePlanTwentyFourteenMember" xlink:to="pten_LongTermIncentivePlanTwentyFourteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanTwentyFourteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Patterson-UTI Energy, Inc. 2014 Long-Term Incentive Plan</label>
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanTwentyFourteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Incentive Plan Twenty Fourteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_NonEmployeeDirectorMember" xlink:type="locator" xlink:label="pten_NonEmployeeDirectorMember" />
    <label xml:lang="en-US" xlink:label="pten_NonEmployeeDirectorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Non Employee Director</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_NonEmployeeDirectorMember" xlink:to="pten_NonEmployeeDirectorMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_NonEmployeeDirectorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non Employee Director</label>
    <label xml:lang="en-US" xlink:label="pten_NonEmployeeDirectorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Non Employee Director [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_EmployeeMember" xlink:type="locator" xlink:label="pten_EmployeeMember" />
    <label xml:lang="en-US" xlink:label="pten_EmployeeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EmployeeMember" xlink:to="pten_EmployeeMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_EmployeeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees</label>
    <label xml:lang="en-US" xlink:label="pten_EmployeeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_LongTermIncentivePlanTwoThousandFiveMember" xlink:type="locator" xlink:label="pten_LongTermIncentivePlanTwoThousandFiveMember" />
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanTwoThousandFiveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Long&#8203; term incentive&#8203; plan&#8203; two thousand five.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LongTermIncentivePlanTwoThousandFiveMember" xlink:to="pten_LongTermIncentivePlanTwoThousandFiveMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanTwoThousandFiveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan</label>
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanTwoThousandFiveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Incentive Plan Two Thousand Five [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:type="locator" xlink:label="us-gaap_PerformanceSharesMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_PerformanceSharesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance Units Awards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PerformanceSharesMember" xlink:to="us-gaap_PerformanceSharesMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_PerformanceSharesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Performance Shares [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VestingAxis" xlink:type="locator" xlink:label="us-gaap_VestingAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingAxis" xlink:to="us-gaap_VestingAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VestingDomain" xlink:type="locator" xlink:label="us-gaap_VestingDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingDomain" xlink:to="us-gaap_VestingDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_ConditionOneMember" xlink:type="locator" xlink:label="pten_ConditionOneMember" />
    <label xml:lang="en-US" xlink:label="pten_ConditionOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Condition one.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ConditionOneMember" xlink:to="pten_ConditionOneMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ConditionOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condition One [Member]</label>
    <label xml:lang="en-US" xlink:label="pten_ConditionOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Condition One [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_ConditionTwoMember" xlink:type="locator" xlink:label="pten_ConditionTwoMember" />
    <label xml:lang="en-US" xlink:label="pten_ConditionTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Condition two.</label>
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    <label xml:lang="en-US" xlink:label="pten_ConditionTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condition Two [Member]</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardDateAxis" xlink:type="locator" xlink:label="us-gaap_AwardDateAxis" />
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    <label xml:lang="en-US" xlink:label="us-gaap_AwardDateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardDateDomain" xlink:type="locator" xlink:label="us-gaap_AwardDateDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_AwardDateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Date</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AwardDateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Domain]</label>
    <loc xlink:href="pten-20181231.xsd#pten_YearTwentyFifteenMember" xlink:type="locator" xlink:label="pten_YearTwentyFifteenMember" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyFifteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year twenty fifteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_YearTwentyFifteenMember" xlink:to="pten_YearTwentyFifteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyFifteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2015</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares available for future issuance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares authorized for grant</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized</label>
    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesOutstanding" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesOutstanding" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Based Compensation Arrangement By Share Based Payment Award Number of Shares Outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesOutstanding" xlink:to="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesOutstanding_lbl" />
    <label xml:lang="en-US" xlink:label="pten_LongTermIncentivePlanTwoThousandFiveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended</label>
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Authorized for Grant</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Underlying Awards Outstanding</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Outstanding</label>
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Available for Grant</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Awards vesting period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1</label>
    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsPeriod" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsPeriod" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Based Compensation Arrangement by Share Based Payment Award, Awards Incentive Period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsPeriod" xlink:to="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsPeriod_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Option term</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Awards Period</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of stock option granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Volatility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Volatility Rate</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" />
    <label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected term (in years)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend yield</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding at beginning of year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number</label>
    <label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Exercised</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Expired</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period</label>
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding at end of year</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercisable at end of year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average exercise price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding at beginning of year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" />
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    <label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" />
    <label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercisable, aggregate intrinsic value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" />
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    <label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1</label>
    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfOptionsVested" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfOptionsVested" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average grant date fair value of stock options granted (per share)</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfOptionsVested_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate grant date fair value of stock options vested during the year</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfOptionsVested_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Grant Date Fair Value Of Options Vested</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate intrinsic value of stock options exercised</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares" />
    <label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding non-vested options</label>
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    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestWeightedAverageRemainingContractualTermOne" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestWeightedAverageRemainingContractualTermOne" />
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestAggregateIntrinsicValue" xlink:to="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestAggregateIntrinsicValue_lbl" />
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    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestAggregateIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Expected To Vest Aggregate Intrinsic Value</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Forfeited</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding at beginning of year</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vested</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeited</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value</label>
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding at end of year</label>
    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest, Outstanding, Number</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber" xlink:to="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding non-vested restricted stock</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested And Expected To Vest Outstanding Number</label>
    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingVestingTerm" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingVestingTerm" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingVestingTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options nonvested weighted average remaining vesting term</label>
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    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingVestingTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average remaining vesting period</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingVestingTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Remaining Vesting Term</label>
    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodInConnectionWithAcquisition" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodInConnectionWithAcquisition" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodInConnectionWithAcquisition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period in connection with acquisition.</label>
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    <loc xlink:href="pten-20181231.xsd#pten_TimeBasedRestrictedStockUnitsMember" xlink:type="locator" xlink:label="pten_TimeBasedRestrictedStockUnitsMember" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
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    <loc xlink:href="pten-20181231.xsd#pten_BasisOfAnnualPercentageExceeds" xlink:type="locator" xlink:label="pten_BasisOfAnnualPercentageExceeds" />
    <label xml:lang="en-US" xlink:label="pten_BasisOfAnnualPercentageExceeds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Basis of annual percentage exceeds.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_BasisOfAnnualPercentageExceeds" xlink:to="pten_BasisOfAnnualPercentageExceeds_lbl" />
    <label xml:lang="en-US" xlink:label="pten_BasisOfAnnualPercentageExceeds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of annual percentage exceeds</label>
    <label xml:lang="en-US" xlink:label="pten_BasisOfAnnualPercentageExceeds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Basis Of Annual Percentage Exceeds</label>
    <loc xlink:href="pten-20181231.xsd#pten_PerformanceAwardTargetNumberOfShares" xlink:type="locator" xlink:label="pten_PerformanceAwardTargetNumberOfShares" />
    <label xml:lang="en-US" xlink:label="pten_PerformanceAwardTargetNumberOfShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance award target number of shares.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PerformanceAwardTargetNumberOfShares" xlink:to="pten_PerformanceAwardTargetNumberOfShares_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_YearTwentyEighteenMember" xlink:type="locator" xlink:label="pten_YearTwentyEighteenMember" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year twenty eighteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_YearTwentyEighteenMember" xlink:to="pten_YearTwentyEighteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2018</label>
    <label xml:lang="en-US" xlink:label="pten_YearTwentyEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Year Twenty Eighteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_YearTwentySeventeenMember" xlink:type="locator" xlink:label="pten_YearTwentySeventeenMember" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentySeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year twenty seventeen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_YearTwentySeventeenMember" xlink:to="pten_YearTwentySeventeenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentySeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2017</label>
    <label xml:lang="en-US" xlink:label="pten_YearTwentySeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Year Twenty Seventeen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_YearTwentySixteenMember" xlink:type="locator" xlink:label="pten_YearTwentySixteenMember" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentySixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year twenty sixteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_YearTwentySixteenMember" xlink:to="pten_YearTwentySixteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentySixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2016</label>
    <label xml:lang="en-US" xlink:label="pten_YearTwentySixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Year Twenty Sixteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_YearTwentyFourteenMember" xlink:type="locator" xlink:label="pten_YearTwentyFourteenMember" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyFourteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year twenty fourteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_YearTwentyFourteenMember" xlink:to="pten_YearTwentyFourteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyFourteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2014</label>
    <label xml:lang="en-US" xlink:label="pten_YearTwentyFourteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Year Twenty Fourteen [Member]</label>
    <loc xlink:href="pten-20181231.xsd#pten_YearTwentyThirteenMember" xlink:type="locator" xlink:label="pten_YearTwentyThirteenMember" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyThirteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year twenty thirteen.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_YearTwentyThirteenMember" xlink:to="pten_YearTwentyThirteenMember_lbl" />
    <label xml:lang="en-US" xlink:label="pten_YearTwentyThirteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2013</label>
    <label xml:lang="en-US" xlink:label="pten_YearTwentyThirteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Year Twenty Thirteen [Member]</label>
    <label xml:lang="en-US" xlink:label="pten_PerformanceAwardTargetNumberOfShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Target number of shares</label>
    <label xml:lang="en-US" xlink:label="pten_PerformanceAwardTargetNumberOfShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Performance Award Target Number Of Shares</label>
    <loc xlink:href="pten-20181231.xsd#pten_StockIssuedDuringPeriodSharesIssuedForSettlement" xlink:type="locator" xlink:label="pten_StockIssuedDuringPeriodSharesIssuedForSettlement" />
    <label xml:lang="en-US" xlink:label="pten_StockIssuedDuringPeriodSharesIssuedForSettlement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares issued for settlement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_StockIssuedDuringPeriodSharesIssuedForSettlement" xlink:to="pten_StockIssuedDuringPeriodSharesIssuedForSettlement_lbl" />
    <label xml:lang="en-US" xlink:label="pten_StockIssuedDuringPeriodSharesIssuedForSettlement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued</label>
    <label xml:lang="en-US" xlink:label="pten_StockIssuedDuringPeriodSharesIssuedForSettlement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Issued For Settlement</label>
    <loc xlink:href="pten-20181231.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards" xlink:type="locator" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award grant date fair value of awards.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards" xlink:to="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards_lbl" />
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate fair value at date of grant</label>
    <label xml:lang="en-US" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Grant Date Fair Value Of Awards</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" />
    <label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock-based compensation expense associated with Performance Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allocated Share Based Compensation Expense</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesRentExpenseNet" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesRentExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rent expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesRentExpenseNet" xlink:to="us-gaap_OperatingLeasesRentExpenseNet_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesRentExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Rent Expense Net</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2019</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due Current</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Two Years</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Three Years</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Four Years</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due In Five Years</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due Thereafter</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Future Minimum Payments Due</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:type="locator" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal income tax benefit:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:to="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Income Tax Expense Benefit Continuing Operations [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Federal Tax Expense Benefit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Federal Income Tax Expense Benefit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations" xlink:type="locator" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations" />
    <label xml:lang="en-US" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Federal income tax benefit, Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations" xlink:to="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Income Tax Expense Benefit Continuing Operations</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:type="locator" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperationsAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State income tax expense (benefit):</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:to="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">State And Local Income Tax Expense Benefit Continuing Operations [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:to="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current State And Local Tax Expense Benefit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred State And Local Income Tax Expense Benefit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations" xlink:type="locator" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations" />
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations" xlink:to="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">State And Local Income Tax Expense Benefit Continuing Operations</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:type="locator" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign income tax expense (benefit):</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:to="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Income Tax Expense Benefit Continuing Operations [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentForeignTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Foreign Tax Expense Benefit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredForeignIncomeTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredForeignIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredForeignIncomeTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredForeignIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Foreign Income Tax Expense Benefit</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations" xlink:type="locator" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations" />
    <label xml:lang="en-US" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Foreign Income Tax Expense (Benefit), Continuing Operations, Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations" xlink:to="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Income Tax Expense Benefit Continuing Operations</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total income tax benefit:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:to="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense Benefit Continuing Operations [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Income Tax Expense Benefit</label>
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deferred</label>
    <label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total income tax benefit:</label>
    <loc xlink:href="pten-20181231.xsd#pten_EffectiveIncomeTaxRateReconciliation" xlink:type="locator" xlink:label="pten_EffectiveIncomeTaxRateReconciliation" />
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Items that are deductible or taxable for tax purposes only. These items are not treated as revenue or expense for book purposes.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EffectiveIncomeTaxRateReconciliation" xlink:to="pten_EffectiveIncomeTaxRateReconciliation_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_EffectiveIncomeTaxRateReconciliationAcquisitionRelatedDifferences" xlink:type="locator" xlink:label="pten_EffectiveIncomeTaxRateReconciliationAcquisitionRelatedDifferences" />
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationAcquisitionRelatedDifferences_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation acquisition related differences.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EffectiveIncomeTaxRateReconciliationAcquisitionRelatedDifferences" xlink:to="pten_EffectiveIncomeTaxRateReconciliationAcquisitionRelatedDifferences_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_EffectiveIncomeTaxRateReconciliationStateDeferredTaxRemeasurement" xlink:type="locator" xlink:label="pten_EffectiveIncomeTaxRateReconciliationStateDeferredTaxRemeasurement" />
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationStateDeferredTaxRemeasurement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation state deferred tax remeasurement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EffectiveIncomeTaxRateReconciliationStateDeferredTaxRemeasurement" xlink:to="pten_EffectiveIncomeTaxRateReconciliationStateDeferredTaxRemeasurement_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statutory tax rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State income taxes - net of the federal income tax benefit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation State And Local Income Taxes</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill impairment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses</label>
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Permanent differences</label>
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax effects of tax reform</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost</label>
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationAcquisitionRelatedDifferences_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquisition related differences</label>
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationAcquisitionRelatedDifferences_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Acquisition Related Differences</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance</label>
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationStateDeferredTaxRemeasurement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State deferred tax remeasurement</label>
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationStateDeferredTaxRemeasurement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation State Deferred Tax Remeasurement</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other differences, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Other Adjustments</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effective tax rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Continuing Operations</label>
    <loc xlink:href="pten-20181231.xsd#pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRate" xlink:type="locator" xlink:label="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRate" />
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation,decrease in effective tax rate.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRate" xlink:to="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRate_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRateDueToChangeInFederalCorporateTaxRate" xlink:type="locator" xlink:label="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRateDueToChangeInFederalCorporateTaxRate" />
    <label xml:lang="en-US" xlink:label="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRateDueToChangeInFederalCorporateTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation decrease in effective tax rate due to change in federal corporate tax rate.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRateDueToChangeInFederalCorporateTaxRate" xlink:to="pten_EffectiveIncomeTaxRateReconciliationDecreaseInEffectiveTaxRateDueToChangeInFederalCorporateTaxRate_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_IncomeTaxesLineItems" xlink:type="locator" xlink:label="pten_IncomeTaxesLineItems" />
    <label xml:lang="en-US" xlink:label="pten_IncomeTaxesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income Taxes [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_IncomeTaxesLineItems" xlink:to="pten_IncomeTaxesLineItems_lbl" />
    <loc xlink:href="pten-20181231.xsd#pten_IncomeTaxesTable" xlink:type="locator" xlink:label="pten_IncomeTaxesTable" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" />
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    <label xml:lang="en-US" xlink:label="pten_MajorCustomerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Major Customer [Member]</label>
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    <label xml:lang="en-US" xlink:label="pten_MajorCustomerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Major Customer</label>
    <label xml:lang="en-US" xlink:label="pten_MajorCustomerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Major Customer [Member]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosureItemAmountsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurement</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:type="locator" xlink:label="us-gaap_CarryingReportedAmountFairValueDisclosureMember" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:type="locator" xlink:label="us-gaap_LongTermDebtFairValue" />
    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total debt</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Fair Value</label>
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