Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*

(Last) (First) (Middle)


(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
3. Issuer Name and Ticker or Trading Symbol
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
VP, Cntrlr, Chf Acctg Offcr
5. If Amendment, Date of Original Filed (Month/Day/Year)
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 Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock 927 D
Common Stock 142 I by 401(K) Plan
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Phantom Stock (1) (1) Common Stock 127 (2) D
Stock Option (right to buy) 03/11/2005 01/29/2013 Common Stock 2,649 20.07 D
Stock Option (right to buy) 03/11/2005 01/28/2014 Common Stock 4,293 26.17 D
Stock Option (right to buy) 01/26/2006(3) 01/26/2015 Common Stock 5,686 36.34 D
Explanation of Responses:
1. The Phantom Stock is payable in cash or common stock following termination of the reporting person's employment with the Issuer; subject to earlier withdrawal or transfer in accordance with the terms of the Issuer's Deferred Compensation Plan.
2. 1-for-1
3. This option vests in three equal annual installments beginning on the date shown.
By: M. Gay Mather For: Robert W. Blanchard 05/24/2005
** 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 5 (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 Number.

Know all by these presents, that the undersigned
hereby constitutes and appoints each of
M. Gay Mather and Dwight W. Rettig, signing
singly, 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.

IN WITNESS WHEREOF, the undersigned has
caused this Power of Attorney to be executed
as of this 24th day of May, 2005.

/s/ Robert W. Blanchard