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    <link:label id="lab_us-gaap_Assets_1EDDF6F6D36433C5391B9DF99A23E10C_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_1EDDF6F6D36433C5391B9DF99A23E10C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_9ADE6BD2312C35A2B4119DF99A24861A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LiabilitiesCurrent_F5D46D780A2EA313D30B9DF99A249C74_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_F5D46D780A2EA313D30B9DF99A249C74" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current</link:label>
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    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesNoncurrent_8548E94C6EAF298F55739DF99A253504_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesNoncurrent_8548E94C6EAF298F55739DF99A253504" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Net, Noncurrent</link:label>
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    <link:label id="lab_tti_PreferredUnits_CBD1C856B74E5FD4FF849DF99A25B705_documentation_en-US" xlink:label="lab_tti_PreferredUnits_CBD1C856B74E5FD4FF849DF99A25B705" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Including the current and noncurrent portions, carrying amount of debt identified as being convertible into common units as of the balance sheet date.</link:label>
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    <link:label id="lab_tti_CashFlowLesseeAbstract_6018953D6E901AAE5BD79E5DBA325105_documentation_en-US" xlink:label="lab_tti_CashFlowLesseeAbstract_6018953D6E901AAE5BD79E5DBA325105" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash Flow, Lessee [Abstract]</link:label>
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    <link:label id="lab_us-gaap_OperatingLeasePayments_833B2CCF227C8FBAB92D9E5DBA352853_label_en-US" xlink:label="lab_us-gaap_OperatingLeasePayments_833B2CCF227C8FBAB92D9E5DBA352853" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Payments</link:label>
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    <link:label id="lab_us-gaap_FinanceLeasePrincipalPayments_291D05CA2A01E43DEBA99E5DBA36F2F2_label_en-US" xlink:label="lab_us-gaap_FinanceLeasePrincipalPayments_291D05CA2A01E43DEBA99E5DBA36F2F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance Lease, Principal Payments</link:label>
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    <link:label id="lab_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_6838756049C5055AC8E19E5DBA36B106_label_en-US" xlink:label="lab_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_6838756049C5055AC8E19E5DBA36B106" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Right-of-Use Asset Obtained in Exchange for Operating Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_6838756049C5055AC8E19E5DBA36B106" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_6149939BAF67AFA7DA6B9E5DBA36A838_terseLabel_en-US" xlink:label="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_6149939BAF67AFA7DA6B9E5DBA36A838" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finance leases</link:label>
    <link:label id="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_6149939BAF67AFA7DA6B9E5DBA36A838_label_en-US" xlink:label="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_6149939BAF67AFA7DA6B9E5DBA36A838" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Right-of-Use Asset Obtained in Exchange for Finance Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_6149939BAF67AFA7DA6B9E5DBA36A838" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock_12F128298E4456A18A71B06C44A5873A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_E4A185F9AD6E57614C87E600CB2B271C_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_7F15AB9F63635DCBBC6578D65C24E82E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Changes in Contract Liabilities</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_E4A185F9AD6E57614C87E600CB2B271C_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_7F15AB9F63635DCBBC6578D65C24E82E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Asset and Liability [Table Text Block]</link:label>
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    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_6905A84B403DB7582E6AE600CB2C6952_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_71B0DF7AF93F518899B978604B6066A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_6905A84B403DB7582E6AE600CB2C6952_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_71B0DF7AF93F518899B978604B6066A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table Text Block]</link:label>
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