<SEC-DOCUMENT>0001209191-19-025978.txt : 20190425
<SEC-HEADER>0001209191-19-025978.hdr.sgml : 20190425
<ACCEPTANCE-DATETIME>20190425161752
ACCESSION NUMBER:		0001209191-19-025978
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190423
FILED AS OF DATE:		20190425
DATE AS OF CHANGE:		20190425

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hendricks William Andrew JR
		CENTRAL INDEX KEY:			0001546374

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22664
		FILM NUMBER:		19767668

	MAIL ADDRESS:	
		STREET 1:		450 GEARS ROAD, SUITE 500
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77067

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PATTERSON UTI ENERGY INC
		CENTRAL INDEX KEY:			0000889900
		STANDARD INDUSTRIAL CLASSIFICATION:	DRILLING OIL & GAS WELLS [1381]
		IRS NUMBER:				752504748
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		10713 WEST SAM HOUSTON PARKWAY NORTH
		STREET 2:		SUITE 800
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77064
		BUSINESS PHONE:		2817657100

	MAIL ADDRESS:	
		STREET 1:		10713 WEST SAM HOUSTON PARKWAY NORTH
		STREET 2:		SUITE 800
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77064

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PATTERSON ENERGY INC
		DATE OF NAME CHANGE:	19940228
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-04-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000889900</issuerCik>
        <issuerName>PATTERSON UTI ENERGY INC</issuerName>
        <issuerTradingSymbol>PTEN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001546374</rptOwnerCik>
            <rptOwnerName>Hendricks William Andrew JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10713 W. SAM HOUSTON PKWY N, SUITE 800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77064</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.01 par value per share</value>
            </securityTitle>
            <transactionDate>
                <value>2019-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>69100</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>976641</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.01 par value per share</value>
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            <transactionDate>
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            <deemedExecutionDate></deemedExecutionDate>
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                    <value>27191</value>
                    <footnoteId id="F2"/>
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                <transactionPricePerShare>
                    <value>15.83</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>949450</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.01 par value per share</value>
            </securityTitle>
            <transactionDate>
                <value>2019-04-23</value>
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            <deemedExecutionDate></deemedExecutionDate>
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                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>178000</value>
                    <footnoteId id="F3"/>
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                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1127450</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.01 par value per share</value>
            </securityTitle>
            <transactionDate>
                <value>2019-04-24</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>32726</value>
                    <footnoteId id="F4"/>
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                <transactionPricePerShare>
                    <value>15.83</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
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        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares received in settlement of the 2016 Performance Unit grant.</footnote>
        <footnote id="F2">Shares disposed to pay applicable withholding taxes on shares received from the 2016 Performance Unit grant.</footnote>
        <footnote id="F3">Restricted stock units that convert into common stock on a one-for-one basis.  One-third of the restricted stock units vests on April 23, 2020 and the remainder vests in equal monthly installments over the twenty-four months following April 23, 2020.</footnote>
        <footnote id="F4">Shares disposed to pay applicable withholding taxes on Restricted stock units converted into common stock on April 24, 2019.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By Barry Huntsman pursuant to a Limited Power of Attorney filed with the SEC on 4/24/2013
/s/ Barry Huntsman</signatureName>
        <signatureDate>2019-04-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
