POWER OF ATTORNEY

      The undersigned constitutes and appoints Brigitte Hunt, Eric Johnson, Ben
Smolij, and John Niedzwiecki, and each of them individually, as the
undersigned's true and lawful attorneys- in-fact and agents for the undersigned
and in the undersigned's name, place and stead, to:

      1.    prepare, sign, and submit to the Securities and Exchange Commission
(the "SEC") on its Electronic Data Gathering, Analysis, and Retrieval Filer
Management website a Form ID application, including any amendments and exhibits
thereto, and any other related documents as may be necessary or appropriate, to
obtain from the SEC access codes to permit filing on the SEC's EDGAR system,
granting unto said attorneys-in-fact and agents full power and authority to do
and perform each act and thing requisite and necessary to be done as required by
any rule or regulation of the SEC and the EDGAR Filer Manual as fully and to all
intents and purposes as the undersigned might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents  may
lawfully do or cause to be done by virtue hereof; and

      2.    sign any and all SEC statements of beneficial ownership of
securities of the undersigned relating to NOV Inc. (the "Company") on Schedule
13D as required under Section 13 and Forms 3, 4 and 5 as required under Section
16(a) of the Securities Exchange Act of 1934, as amended, and any amendments
thereto, and to file the same with all exhibits thereto, and other documents in
connection therewith, with the SEC, the Company, and any stock exchange on which
any of the Company's securities are listed, granting unto said attorneys-in-fact
and agents full power and authority to do and perform each act and thing
requisite and necessary to be done under said Section 13 and Section 16(a), as
fully and to all intents and purposes as the undersigned might or could do in
person, hereby ratifying and confirming all that said attorneys- in-fact and
agents may lawfully do or cause to be done by virtue hereof.

      A copy of this power of attorney shall be filed with the SEC. The
authorization set forth above shall continue in full force and effect until the
undersigned revokes such authorization by written instructions to the attorney-
in-fact.

      The authority granted hereby shall in no event be deemed to impose or
create any duty on behalf of the attorneys-in-fact with respect to the
undersigned's obligations to file a Form ID, Schedule 13Ds and Forms 3, 4 and 5
with the SEC.


Dated: October 18, 2021



                                          By: /s/ Robert Welborn
                                              ----------------------------------
                                              Name: Robert Welborn