FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

WILLIAMS CLAY C 		2. Issuer Name and Ticker or Trading Symbol

NATIONAL OILWELL VARCO INC [ NOV ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Chairman, President and CEO
(Last)          (First)          (Middle)

7909 PARKWOOD CIRCLE DRIVE 		3. Date of Earliest Transaction (MM/DD/YYYY)

2/28/2018
(Street)

HOUSTON, TX 77036
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   2/28/2018     A    33923   (1) A $0.00   284433   D    
Common Stock   2/28/2018     F    13349   (2) D $35.09   271084   D    
Common Stock   2/28/2018     A    89342   (3) A $0.00   360426   D    
Common Stock                  30000   I   by Children's Trusts  
Common Stock                  41   (4) I   by NOV Saving Plan  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy)   $35.09   2/28/2018     A      339642         (5) 2/29/2028   Common Stock   339642   $0.00   339642   D    

Explanation of Responses:
(1)  Represents the total number of shares that vested from the performance share awards granted to Mr. Williams on February 25, 2015.
(2)  Represents the number of shares withheld from the vesting of the performance share awards granted to Mr. Williams on February 25, 2015 to satisfy tax withholding liability.
(3)  An equity award of time-based restricted stock pursuant to the Issuer's Long-Term Incentive Plan, which will vest in three equal annual installments commencing on the first anniversary of the date of the grant.
(4)  Represents the number of shares equivalent of the Issuer's common stock held by Mr. Williams under the National Oilwell Varco, Inc. Supplemental Savings Plan. The information in this report is based on Mr. Williams' account balance as of February 28, 2018.
(5)  The option, awarded pursuant to the Issuer's Long-Term Incentive Plan, representing a right to purchase a total of 339,642 shares, will become exercisable in three equal annual installments beginning on February 28, 2019, which will be the first anniversary of the date on which the option was granted.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
WILLIAMS CLAY C
7909 PARKWOOD CIRCLE DRIVE
HOUSTON, TX 77036 		X
Chairman, President and CEO

Signatures
By: Brigitte M. Hunt For: Clay C. Williams 3/1/2018
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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