<SEC-DOCUMENT>0001209191-15-019922.txt : 20150228
<SEC-HEADER>0001209191-15-019922.hdr.sgml : 20150227
<ACCEPTANCE-DATETIME>20150227184814
ACCESSION NUMBER:		0001209191-15-019922
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20150225
FILED AS OF DATE:		20150227
DATE AS OF CHANGE:		20150227

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATIONAL OILWELL VARCO INC
		CENTRAL INDEX KEY:			0001021860
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL & GAS FILED MACHINERY & EQUIPMENT [3533]
		IRS NUMBER:				760475815
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7909 PARKWOOD CIRCLE DR
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77036
		BUSINESS PHONE:		713-375-3700

	MAIL ADDRESS:	
		STREET 1:		7909 PARKWOOD CIRCLE DR
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77036

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL OILWELL INC
		DATE OF NAME CHANGE:	19960829

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WILLIAMS CLAY C
		CENTRAL INDEX KEY:			0001248338

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12317
		FILM NUMBER:		15661429
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-02-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001021860</issuerCik>
        <issuerName>NATIONAL OILWELL VARCO INC</issuerName>
        <issuerTradingSymbol>NOV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001248338</rptOwnerCik>
            <rptOwnerName>WILLIAMS CLAY C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7909 PARKWOOD CIRCLE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77036</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman, President and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-Qualified Stock Option
(right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>54.74</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2015-02-25</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>310053</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2025-02-26</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>310053</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>310053</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The option, representing a right to purchase a total of 310,053 shares, will become exercisable in three equal annual installments beginning on February 25, 2016, which will be the first anniversary of the date on which the option was granted.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: Brigitte M. Hunt For: Clay C. Williams</signatureName>
        <signatureDate>2015-02-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>attachment1.htm
<DESCRIPTION>EX-24 DOCUMENT
<TEXT>
<HTML>
<HEAD>
</HEAD>
<BODY>
<PRE>

                               POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Dwight W. Rettig and Brigitte M. Hunt, or either of them signing singly,
and with full power of substitution, the undersigned's true and lawful attorney
-in-fact to:

      (1)   execute for and on behalf of the undersigned, in the undersigned's
            capacity as an officer and/or director of National Oilwell Varco,
            Inc. (the "Company"), Forms 3, 4, and 5 in accordance with Section
            16(a) of the Securities Exchange Act of 1934 and the rules
            thereunder;

      (2)   do and perform any and all acts for and on behalf of the undersigned
            which may be necessary or desirable to complete and execute any such
            Form 3, 4, or 5, complete and execute any amendment or amendments
            thereto, and timely file such form with the United States Securities
            and Exchange Commission and any stock exchange or similar authority;
            and

      (3)   take any other action of any type whatsoever in connection with the
            foregoing which, in the opinion of such attorney-in-fact, may be of
            benefit to, in the best interest of, or legally required by, the
            undersigned, it being understood that the documents executed by such
            attorney-in-fact on behalf of the undersigned pursuant to this Power
            of Attorney shall be in such form and shall contain such terms and
            conditions as such attorney-in-fact may approve in such attorney-in
            -fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such attorney
-in-fact's substitute or substitutes, shall lawfully do or cause to be done by
virtue of this power of attorney and the rights and powers herein granted. The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving in
such capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.  This Power of Attorney supersedes all previous
Powers of Attorney relating to the subject matter hereof.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this
2nd day of May, 2014.


/s/ Clay C. Williams
-------------------------------------------
Signature

Clay C. Williams
-------------------------------------------
Print Name




</PRE>
</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
