Document:

Exhibit 10.1

 

AMENDED & RESTATED PROMISSORY NOTE

 

	Not to Exceed $300,000	 	 	October 27, 2021

 

Reference is made to that certain Promissory Note
(the “Original Note”), dated as of March 26, 2021 (the “Effective Date”), by Nabors Energy Transition Corp., a
Delaware corporation (“Maker” or the “Company”), whose address is 515 West Greens Road, Suite 1200, Houston, Texas
77067, and paid to the order of Nabors Corporate Services, Inc., a Delaware corporation (“Payee”), whose address is 515 West
Greens Road, Suite 1200, Houston, Texas 77067. This Amended & Restated Promissory Note (this “Note”) amends and restates
the Original Note in its entirety and shall be deemed effective as of the Effective Date.

 

FOR VALUE RECEIVED, the undersigned Maker, hereby
unconditionally promises to pay to the order of the Payee, at Payee’s office (or such other address specified by Payee to Maker),
the sum of THREE HUNDRED THOUSAND DOLLARS ($300,000) or such lesser amount as shall have been advanced by Payee to Maker and shall remain
unpaid under this Note, in legal and lawful money of the United States of America.

 

Payee may make advances to Maker from time to
time under this Note; provided, however, that notwithstanding anything to the contrary herein, at no time shall the aggregate of all advances
and re-advances outstanding under this Note exceed $300,000.

 

This is a non-interest bearing Note.

 

The entire unpaid principal balance of this Note
shall be due and payable upon the earlier of April 30, 2022 or the consummation of a public offering of the Company’s securities.

 

If payment of this Note or any installment of
this Note is not made when due, the entire indebtedness hereunder, at the option of Payee, shall immediately become due and payable, and
Payee shall be entitled to pursue any or all remedies to which Payee is entitled hereunder, or at law or in equity.

 

This Note may be prepaid, in whole or in part,
without penalty. This Note may not be changed, amended or modified except in a writing expressly intended for such purpose and executed
by the party against whom enforcement of the change, amendment or modification is sought. The loan evidenced by this Note is made solely
for business purposes.

 

THIS NOTE IS BEING EXECUTED AND DELIVERED, AND
IS INTENDED TO BE PERFORMED, IN THE STATE OF NEW YORK. EXCEPT TO THE EXTENT THAT THE LAWS OF THE UNITED STATES MAY APPLY TO THE TERMS
HEREOF, THE SUBSTANTIVE LAWS OF THE STATE OF NEW YORK SHALL GOVERN THE VALIDITY, CONSTRUCTION, ENFORCEMENT AND INTERPRETATION OF THIS
NOTE. IN THE EVENT OF A DISPUTE INVOLVING THIS NOTE OR ANY OTHER INSTRUMENTS EXECUTED IN CONNECTION HEREWITH, THE UNDERSIGNED PARTIES
IRREVOCABLY AGREE THAT VENUE FOR SUCH DISPUTE SHALL LIE IN ANY COURT OF COMPETENT JURISDICTION IN THE STATE OF NEW YORK.

 

Service of any notice by Maker to Payee or by
Payee to Maker, shall be mailed, postage prepaid by certified United States mail, return receipt requested, at the address for such party
set forth in this Note, or at such subsequent address provided to the other party hereto in the manner set forth in this paragraph for
all notices. Any such notice shall be deemed given three (3) days after deposit thereof in an official depository under the care and custody
of the United States Postal Service.

 

Should the indebtedness represented by this Note
or any part thereof be collected at law or in equity or through any bankruptcy, receivership, probate or other court proceedings or if
this Note is placed in the hands of attorneys for collection after default, the undersigned and all endorsers, guarantors and sureties
of this Note jointly and severally agree to pay to the holder of this Note, in addition to the principal and interest due and payable
hereon, reasonable attorneys’ and collection fees.

 

The undersigned and all endorsers, guarantors
and sureties of this Note and all other persons liable or to become liable on this Note severally waive presentment for payment, demand,
notice of demand and of dishonor and nonpayment of this Note, notice of intention to accelerate the maturity of this Note, notice of acceleration,
protest and notice of protest, diligence in collecting, and the bringing of suit against any other party, and agree to all renewals, extensions,
modifications, partial payments, releases or substitutions of security, in whole or in part, with or without notice, before or after maturity.

 

     

     

    

 

The undersigned hereby expressly and unconditionally
waives, in connection with any suit, action or proceeding brought by the payee on this Note, any and every right it may have to (i) injunctive
relief, (ii) a trial by jury, (iii) interpose any counterclaim therein and (iv) have the same consolidated with any other or separate
suit, action or proceeding. Nothing herein contained shall prevent or prohibit the undersigned from instituting or maintaining a separate
action against payee with respect to any asserted claim.

 

Any provision contained in this Note which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability
without invalidating the remaining provisions hereof, and any such prohibitions or unenforceability in any jurisdiction shall not invalidate
or render unenforceable such provision in any other jurisdiction.

 

This Note represents the final agreement between
the parties and may not be contradicted by evidence of prior, contemporaneous or subsequent oral agreements of the parties.

 

[Signature page follows]

 

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EXECUTED AND AGREED as of the date first above
written.

 

	 	nabors
    energy transition corp.,
	 	a Delaware corporation
	 	 
	 	By:	/s/
    Anthony G. Petrello
	 	Name:	Anthony G. Petrello
	 	Title:	President and Chief Executive Officer

 

SIGNATURE PAGE TO 

AMENDED & RESTATED PROMISSORY NOTEExhibit 10.2

 

[●], 2021

 

Nabors Energy Transition Corp.

515 West Greens Road, Suite 1200

Houston, TX 77067

 

	Re:	Initial
    Public Offering

 

Ladies and Gentlemen:

 

This letter (this “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) entered
into by and among Nabors Energy Transition Corp., a Delaware corporation (the “Company”), Citigroup Global
Markets Inc. and Wells Fargo Securities, LLC as underwriters (the “Underwriters”), relating to an underwritten
initial public offering (the “Public Offering”), of up to 23,000,000 of the Company’s units (including
up to 3,000,000 units which may be purchased to cover over-allotments, if any) (the “Units”), each comprised
of one share of the Company’s Class A common stock, par value $0.0001 per share (the “Class A Common Stock”),
and one-half of one redeemable warrant (each whole warrant, a “Warrant”). Each Warrant entitles the holder
thereof to purchase one share of Class A Common Stock at a price of $11.50 per share, subject to adjustment. The Units shall be sold
in the Public Offering pursuant to the registration statement on Form S-1 (File No. 333-[●]) and prospectus (the “Prospectus”)
filed by the Company with the Securities and Exchange Commission (the “Commission”), and the Company shall
apply to have the Units listed on the New York Stock Exchange. Certain capitalized terms used herein are defined in paragraph 11
hereof.

 

In order to induce the Company and the Underwriters
to enter into the Underwriting Agreement and to proceed with the Public Offering and for other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, Nabors Energy Transition Sponsor LLC, a Delaware limited liability company (the “Sponsor”),
and each of the undersigned individuals, each of whom is a member of the Company’s board of directors (the “Board”)
and/or management team (each an “Insider” and, collectively, the “Insiders”), hereby
agrees with the Company as follows:

 

1.             The
Sponsor and each Insider agree that if the Company seeks stockholder approval of a proposed Business Combination, then in connection
with such proposed Business Combination, it, he or she shall vote all Founder Shares and any shares acquired by it, him or her in the
Public Offering or the secondary public market in favor of such proposed Business Combination.

 

2.             The
Sponsor and each Insider hereby agree that in the event that the Company fails to consummate a Business Combination within 15 months
from the closing of the Public Offering, or up to 21 months from the closing of the Public Offering if the Company has extended the
period of time to consummate a Business Combination, or such later period approved by the Company’s stockholders, in
accordance with the Company’s amended and restated certificate of incorporation, as may be amended from time to time (the
 “Certificate of Incorporation”), the Sponsor and each Insider shall take all reasonable steps to cause the
Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than
10 business days thereafter, subject to lawfully available funds therefor, redeem 100% of the Class A Common Stock sold as part of
the Units in the Public Offering (the “Offering Shares”), at a per-share price, payable in cash, equal to
the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not
previously released to the Company to pay its taxes (less up to $100,000 of interest to pay dissolution expenses and net of taxes
payable), divided by the number of then outstanding Offering Shares, which redemption will completely extinguish the Public
Stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), subject to
applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the
Company’s remaining stockholders and the Board, dissolve and liquidate, subject, in each case, to the Company’s
obligations under Delaware law to provide for claims of creditors and other requirements of applicable law. The Sponsor and each
Insider agree to not propose any amendment to the Certificate of Incorporation (A) in a manner that would affect the substance or
timing of the Company’s obligation to redeem 100% of the Offering Shares if the Company does not complete an initial Business
Combination within 15 months (or up to 21 months, as applicable) from the closing of the Public Offering or (B) with respect to any
other material provision relating to the rights of holders of Offering Shares or pre-initial Business Combination activity, unless
the Company provides its Public Stockholders with the opportunity to redeem their Offering Shares upon approval of any such
amendment at a per share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including
interest earned on the funds held in the Trust Account and not previously released to the Company to pay its taxes, divided by the
number of then outstanding Offering Shares.

 

     

     

    

 

The Sponsor and each Insider acknowledges
that it, he or she has no right, title, interest or claim of any kind in or to any monies held in the Trust Account or any other
asset of the Company as a result of any liquidation of the Company with respect to the Founder Shares. The Sponsor and each Insider
hereby further waives, with respect to any shares of the Class A Common Stock held by it, him or her, any redemption rights it, he
or she may have in connection with the consummation of an initial Business Combination, including, without limitation, any such
rights available in the context of a stockholder vote to approve such initial Business Combination or in the context of a tender
offer made by the Company to purchase shares of the Class A Common Stock and in connection with a stockholder vote to amend the
Company’s Certificate of Incorporation in a manner that would affect the substance or timing of the Company’s obligation
to redeem 100% of the Offering Shares if the Company has not consummated an initial Business Combination within 15 months from the
closing of the Public Offering (or up to 21 months, as applicable) (although the Sponsor, the Insiders and their respective affiliates shall be entitled to redemption and liquidation rights
with respect to any shares of the Class A Common Stock (other than the Founder Shares) it or they hold if the Company fails to
consummate an initial Business Combination within 15 months from the date of the closing of the Public Offering (or up to 21 months, as applicable) or such later date as may be specified
in an amendment to the Company’s Certificate of Incorporation).

 

To the fullest extent permitted by applicable
law, the Company hereby agrees to defend, indemnify, hold harmless and exonerate (including the advancement of expenses to the fullest
extent permitted by applicable law) the Sponsor, its affiliates and their respective present and former officers and directors (each,
a “Sponsor Indemnitee”) from any and all costs, fees, expenses, judgments, liabilities, fines, penalties, reasonable
attorneys’ fees and amounts paid in settlement (including all interest, assessments and other charges paid or payable in connection
with or in respect of such costs, fees, expenses, judgments, liabilities, fines, penalties and amounts paid in settlement) actually,
and reasonably, incurred by a Sponsor Indemnitee or on a Sponsor Indemnitee’s behalf in connection with any threatened, pending
or completed action, suit, arbitration, mediation, alternate dispute resolution mechanism, investigation, inquiry, hearing or any other
actual, threatened or completed proceeding instituted by the Company or any third party, whether civil, criminal, administrative or investigative
in nature, in respect of any investment opportunities sourced by a Sponsor Indemnitee for the Company or any liability arising with respect
to a Sponsor Indemnitee’s activities in connection with the affairs of the Company (in each case to the extent that such indemnification,
hold harmless and exoneration obligations with respect to such matters are not expressly covered by a separate written agreement between
the Company and the applicable Sponsor Indemnitee); provided, that in no event shall a Sponsor Indemnitee be entitled to be indemnified
or held harmless hereunder in respect of any costs, fees, expenses, judgments, liabilities, fines, penalties and amounts paid in settlement
(if any) that Sponsor Indemnitee may incur by reason of such person’s own actual fraud or intentional misconduct; provided further,
for the avoidance of doubt, that under no circumstance shall a Sponsor Indemnitee have a claim to any monies or assets held in the Trust
Account, and the Company shall not be permitted to procure monies or assets held in the Trust Account for the satisfaction of its obligations
to any Sponsor Indemnitee in respect of the indemnification provided hereunder. The Sponsor Indemnitees shall be third party beneficiaries
of this paragraph.  

 

     

     

    

 

3.             During
the period commencing on the effective date of the Underwriting Agreement and ending 180 days after such date, the undersigned shall
not, without the prior written consent of the Underwriters, except (a) issuances of shares of Class B common stock of the Company, par
value $0.0001 per share (the “Class B Common Stock”) upon the conversion or exchange of shares of Class F common
stock of the Company, par value $0.0001 per share (the “Class F Common Stock” and, together with the Class
A Common Stock and the Class B Common Stock, the “Common Stock”), (b) issuances of shares of Class A Common
Stock upon the conversion or exchange of shares of Class B Common Stock and (c) issuances of Founder Shares upon the forfeiture by the
Sponsor to the Company of an identical number of Founder Shares, (i) sell, offer to sell, contract or agree to sell, hypothecate, pledge,
or otherwise dispose of or agree to dispose of, directly or indirectly, or establish or increase a put equivalent position or liquidate
or decrease a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange
Act”), and the rules and regulations of the Commission promulgated thereunder, any Units, shares of Class A Common Stock,
shares of Class B Common Stock, shares of Class F Common Stock, Warrants or any securities convertible into, or exercisable, or exchangeable
for, shares of Common Stock owned by him, her or it; or (ii) publicly announce any intention to effect any transaction specified in clause
(i). If the undersigned is an officer or director of the Company, the undersigned further agrees that the foregoing restrictions shall
be equally applicable to any issuer-directed Units that the undersigned may purchase in the Public Offering.

 

4.             In
the event of the liquidation of the Trust Account, the Sponsor (which for purposes of clarification shall not extend to any officer,
member or manager of the Sponsor) agrees to indemnify and hold harmless the Company against any and all loss, liability, claim, damage
and expense whatsoever (including, but not limited to, any and all legal or other expenses reasonably incurred in investigating, preparing
or defending against any litigation, whether pending or threatened, or any claim whatsoever) to which the Company may become subject
as a result of any claim by (i) any third party (other than the Company’s independent public accountants) for services rendered
or products sold to the Company or (ii) a prospective target business with which the Company has entered into a written letter of intent,
confidentiality or other similar agreement or business combination agreement (a “Target”); provided, however,
that such indemnification of the Company by the Sponsor shall apply only to the extent necessary to ensure that such claims by a third
party for services rendered (other than the Company’s independent public accountants) or products sold to the Company or a Target
do not reduce the amount of funds in the Trust Account to below the lesser of (A) $10.20 per Offering Share and (B) the actual amount
per Offering Share held in the Trust Account due to reductions in the value of the trust assets as of the date of the liquidation of
the Trust Account, in each case including interest earned on the funds held in the Trust Account and not previously released to the Company
to pay its taxes, less taxes payable, except as to any claims by a third party or Target that executed an agreement waiving claims against
and all rights to seek access to the Trust Account whether or not such agreement is enforceable. In the event that any such executed
waiver is deemed to be unenforceable against such third party, the Sponsor shall not be responsible for any liability as a result of
any such third-party claims. Notwithstanding any of the foregoing, such indemnification of the Company by the Sponsor shall not apply
as to any claims under the Company’s obligation to indemnify the Underwriters against certain liabilities, including liabilities
under the Securities Act of 1933, as amended (the “Securities Act”). The Sponsor shall have the right to defend
against any such claim with counsel of its choice reasonably satisfactory to the Company if, within 15 days following written receipt
of notice of the claim to the Sponsor, the Sponsor notifies the Company in writing that it shall undertake such defense.

 

5.             To
the extent that the Underwriters do not exercise their over-allotment option to purchase an additional 3,000,000 Units (as described
in the Prospectus), the Sponsor agrees, upon the expiration or waiver of such option, to forfeit, for cancellation at no cost, a number
of Founder Shares equal to 750,000 multiplied by a fraction, (i) the numerator of which is 3,000,000 minus the number of Units purchased
by the Underwriter upon the exercise of their over-allotment option, and (ii) the denominator of which is 3,000,000. The forfeiture will
be adjusted to the extent that the over-allotment option is not exercised in full by the Underwriters so that the Founder Shares will
represent 20.0% of the Company’s issued and outstanding Common Stock after the Public Offering. The Sponsor further agrees that
to the extent that (a) the size of the Public Offering is increased or decreased and (b) the Sponsor has either purchased or sold shares
of Common Stock or an adjustment to the number of Founder Shares has been effected by way of a stock split, stock dividend, reverse stock
split, contribution back to capital or otherwise, in each case in connection with such increase or decrease in the size of the Public
Offering, then (A) the references to 3,000,000 in the numerator and denominator of the formula in the first sentence of this paragraph
shall be changed to a number equal to 15.0% of the number of Units issued in the Public Offering and (B) the reference to 750,000 in
the formula set forth in the first sentence of this paragraph shall be adjusted to such number of Founder Shares that the Sponsor would
have to collectively return to the Company in order for all holders of Founder Shares to hold an aggregate of 20.0% of the Company’s
issued and outstanding shares of Common Stock after the Public Offering.

 

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6.             The
Sponsor and each Insider hereby agree and acknowledge that: (i) each of the Underwriters and the Company would be irreparably injured
in the event of a breach by the Sponsor or an Insider of its, his or her obligations under paragraphs 1, 2, 3, 4, 5, 7(a), 7(b)
and 9 of this Letter Agreement, (ii) monetary damages may not be an adequate remedy for such breach and (iii) the non-breaching party
shall be entitled to seek injunctive relief, in addition to any other remedy that such party may have in law or in equity, in the event
of such breach.

 

7.             (a)          Subject
to the exceptions set forth herein, the Sponsor and each Insider agree not to transfer, assign or sell any Founder Shares or the Class
A Common Stock issuable upon conversion of the Founder Shares held by it, him or her until the earlier of (i) one year after the date
of the consummation of a Business Combination and (ii) the earlier to occur of, subsequent to a Business Combination, (A) the first date
on which the last reported sale price of the Class A Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock
dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30 trading-day period commencing at least
150 days after the consummation of a Business Combination and (B) the date on which the Company consummates a subsequent liquidation,
merger, capital stock exchange, reorganization or other similar transaction which results in all of the Company’s stockholders
having the right to exchange their shares of Class A Common Stock for cash, securities or other property (the “Founder Shares
Lock-up Period”).

 

                (b)             Subject
to the exceptions set forth herein, the Sponsor and each Insider agree not to transfer, assign or sell any Private Placement Warrants
or Class A Common Stock underlying such warrants held by it, him or her, until 30 days after the completion of a Business Combination
(the “Private Placement Warrants Lock-Up Period” and, together with the Founder Shares Lock-up Period, the
 “Lock-up Periods”).

 

                (c)             Notwithstanding
the provisions set forth in paragraphs 7(a) and (b), transfers of the Founder Shares (including the conversions or exchanges of
the Founder Shares to shares of Class B Common Stock or Class F Common Stock, as applicable, and the issuance of Founder Shares upon
the forfeiture by the Sponsor to the Company of an identical number of Founder Shares), Private Placement Warrants and shares of Class
A Common Stock issued or issuable upon the exercise or conversion of the Private Placement Warrants or the Founder Shares and that are
held by the Sponsor, any Insider or any of their permitted transferees (that have complied with this paragraph 7(c)) are permitted (i)
to the Company’s officers or directors, any affiliates or family members of any of the Company’s officers or directors, the
Sponsor, any members of the Sponsor or their affiliates, or any affiliates of the Sponsor; (ii) in the case of an individual, by gift
to members of the individual’s immediate family or to a trust, the beneficiary of which is a member of one of the individual’s
immediate family, an affiliate of such person or to a charitable organization; (iii) in the case of an individual, by virtue of laws
of descent and distribution upon death of the individual; (iv) in the case of an individual, pursuant to a qualified domestic relations
order; (v) by virtue of the laws of the state of Delaware or the Sponsor’s operating agreement upon dissolution of the Sponsor;
(vi) by private sales or transfers made in connection with the consummation of a Business Combination at prices no greater than the price
at which the securities were originally purchased; (vii) in the event of the Company’s liquidation prior to the completion of a
Business Combination; or (viii) in the event of completion of a liquidation, merger, stock exchange or other similar transaction which
results in all of the Company’s stockholders having the right to exchange their shares of Class A Common Stock for cash, securities
or other property subsequent to the completion of a Business Combination; provided, however, that in the case of clauses (i) through
(vi), these permitted transferees must enter into a written agreement agreeing to be bound by these transfer restrictions.

 

8.             Each
Insider’s biographical information furnished to the Company and the Underwriters that are included in the Prospectus is true and
accurate in all respects and does not omit any material information with respect to such Insider’s background and contains all
of the information required to be disclosed pursuant to Item 401 of Regulation S-K promulgated under the Securities Act. Each Insider’s
questionnaire furnished to the Company and the Underwriters including any such information that is included in the Prospectus, is true
and accurate in all respects. Each Insider represents and warrants that: such Insider is not subject to or a respondent in any legal
action for, any injunction, cease-and-desist order or order or stipulation to desist or refrain from any act or practice relating to
the offering of securities in any jurisdiction; such Insider has never been convicted of, or pleaded guilty to, any crime (i) involving
fraud, (ii) relating to any financial transaction or handling of funds of another person or (iii) pertaining to any dealings in any securities
and such Insider is not currently a defendant in any such criminal proceeding; and none of the Sponsor or any such Insider has ever been
suspended or expelled from membership in any securities or commodities exchange or association or had a securities or commodities license
or registration denied, suspended or revoked.

 

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9.             Except
as disclosed in the Prospectus, none of the Sponsor, the Insiders or their respective affiliates shall receive any finder’s fee,
reimbursement, consulting fee, monies in respect of any repayment of a loan or other compensation prior to, or in connection with any
services rendered in order to effectuate the consummation of the Company’s initial Business Combination (regardless of the type
of transaction that it is). However, such persons may receive the following payments, none of which will be made from the proceeds held
in the Trust Account prior to the completion of the initial Business Combination: repayment of a loan of up to $300,000 made to the Company
by an affiliate of the Sponsor, pursuant to an Amended and Restated Promissory Note dated effective as of March 26, 2021; payment of
an aggregate of $15,000 per month to the Sponsor or an affiliate thereof for office space, utilities and secretarial and administrative
support, pursuant to an Administrative Support Agreement, dated [●], 2021; reimbursement for any out-of-pocket expenses related
to identifying, investigating, negotiating and consummating an initial Business Combination; and repayment of loans, if any, and on such
terms as to be determined by the Company from time to time, made by the Sponsor or an affiliate of the Sponsor or certain of the Company’s
officers and directors to finance transaction costs in connection with an intended initial Business Combination, provided, that,
if the Company does not consummate an initial Business Combination, a portion of the working capital held outside the Trust Account may
be used by the Company to repay such loaned amounts so long as no proceeds from the Trust Account are used for such repayment. Up to
$1,500,000 of such loans may be convertible into warrants at a price of $1.00 per warrant at the option of the lender. Such warrants
shall be identical to the Private Placement Warrants, including as to exercise price, exercisability and exercise period. Additionally,
in the event the Company does not consummate its initial Business Combination within 15 months, the Company may, by resolution of the
Board and if requested by the Sponsor, extend the period of time to consummate a business combination up to two times, each by an additional
three months (for a total of up to 21 months to complete an initial business combination), subject to the Sponsor (or its affiliates
or designees) depositing into the Trust Account, on or prior to the applicable deadline, additional funds of $2,000,000, or $2,300,000
if the underwriters’ over-allotment option is exercised in full ($0.10 per unit in either case), for each of the available three-month
extensions, for a total payment of up to $4,000,000, or up to $4,600,000 if the underwriters’ over-allotment option is exercised
in full ($0.20 per unit in either case). Any such payments would be made in the form of non-interest bearing loans. If the Company completes
its initial Business Combination, it will, at the option of the Sponsor, repay such loaned amounts out of the proceeds of the Trust Account
released to the Company or convert a portion or all of the total loan amount into warrants at a price of $1.00 per warrant, which warrants
will be identical to the Private Placement Warrants. If the Company does not complete a business combination, it will repay such loans
only from funds held outside of the Trust Account.

 

10.           The
Sponsor and each Insider has full right and power, without violating any agreement to which it, he or she is bound (including, without
limitation, any non-competition or non-solicitation agreement with any employer or former employer), to enter into this Letter Agreement
and, as applicable, to serve as an officer and/or director of the Company and each Insider hereby consents to being named in the Prospectus
as an officer and/or director of the Company, as applicable.

 

11.           As
used herein, (i) “Business Combination” shall mean a merger, capital stock exchange, asset acquisition,
stock purchase, reorganization or similar business combination, involving the Company and one or more businesses or entities; (ii)
 “Founder Shares” shall mean (a) the shares of Class F Common Stock held by the Sponsor, the
Company’s independent directors and any other holder prior to the consummation of the Public Offering, (b) the shares of Class
B Common Stock issued upon the conversion of such Class F Common Stock and (c) the shares of Class A Common Stock issued upon the
conversion of such Class B Common Stock; (iii) “Private Placement Warrants” shall mean the warrants to
purchase 10,690,000 shares of Class A Common Stock (or 11,890,000 shares of Class A Common Stock if the Underwriters’
over-allotment option in connection with the Public Offering is exercised in full), that Nabors Lux 2 S.a.r.l., Anthony G. Petrello,
William J. Restrepo, John Yearwood, Maria Jelescu Dreyfus, Colleen Calhoun and Jennifer Gill Roberts - have agreed to purchase for
an aggregate purchase price of approximately $10,690,000 (or approximately $11,890,000 if the Underwriters’ over-allotment
option in connection with the Public Offering is exercised in full), or $1.00 per warrant, in a private placement that shall occur
simultaneously with the consummation of the Public Offering; (iv) “Public Stockholders” shall mean the
holders of shares of Class A Common Stock issued in the Public Offering; and (v) “Trust Account” shall
mean the trust fund into which a portion of the net proceeds of the Public Offering and the sale of the Private Placement Warrants
shall be deposited.

 

12.           This
Letter Agreement constitutes the entire agreement and understanding of the parties hereto in respect of the subject matter hereof and
supersedes all prior understandings, agreements or representations by or among the parties hereto, written or oral, to the extent they
relate in any way to the subject matter hereof or the transactions contemplated hereby. This Letter Agreement may not be changed, amended,
modified or waived (other than to correct a typographical error) as to any particular provision, except by a written instrument executed
by all parties hereto.

 

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13.           No
party hereto may assign either this Letter Agreement or any of its rights, interests or obligations hereunder without the prior written
consent of the other parties. Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate
to transfer or assign any interest or title to the purported assignee. This Letter Agreement shall be binding on the Sponsor, each Insider
and each of their respective successors, heirs and assigns and permitted transferees.

 

14.           This
Letter Agreement shall be deemed severable, and the invalidity or unenforceability of any term or provision hereof shall not affect the
validity or enforceability of this Letter Agreement or of any other term or provision hereof. Furthermore, in lieu of any such invalid
or unenforceable term or provision, the parties hereto intend that there shall be added as a part of this Letter Agreement a provision
as similar in terms to such invalid or unenforceable provision as may be possible and be valid and enforceable.

 

15.           This
Letter Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving
effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. The parties
hereto (i) all agree that any action, proceeding, claim or dispute arising out of, or relating in any way to, this Letter Agreement shall
be brought and enforced in the courts of New York City, in the State of New York, and irrevocably submit to such jurisdiction and venue,
which jurisdiction and venue shall be exclusive and (ii) waive any objection to such exclusive jurisdiction and venue or that such courts
represent an inconvenient forum.

 

16.           Any
notice, consent or request to be given in connection with any of the terms or provisions of this Letter Agreement shall be in writing
and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery
or facsimile or other electronic transmission.

 

17.           This
Letter Agreement shall terminate on the earlier of (i) the expiration of the Lock-up Periods or (ii) the liquidation of the Company;
provided, however, that this Letter Agreement shall earlier terminate in the event that the Public Offering is not consummated
and closed by [●], provided further that paragraph 4 of this Letter Agreement shall survive such liquidation.

 

18.           This
Letter Agreement may be executed in any number of original or facsimile counterparts and each of such counterparts shall for all purposes
be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. Delivery of a signed
counterpart of this Agreement by facsimile or electronic transmission shall constitute valid and sufficient delivery thereof.

 

[Signature Page Follows]

 

    5

     

    

 

	 	Sincerely,
	 	 
	 	NABORS ENERGY TRANSITION
    SPONSOR LLC

 

	 	By:	 
	 	Name:	Anthony G. Petrello
	 	Title:	President, Chief Executive Officer and Secretary

 

	 	INSIDERS:
	 	 
	 	NABORS LUX 2 S.A.R.L.

 

	 	By:	 
	 	Name:	Henricus Reindert Petrus Pollmann
	 	Title:	Type A Manager

 

	 	 
	 	Anthony G. Petrello
	 	 
	 	 
	 	William J. Restrepo
	 	 
	 	 
	 	John Yearwood
	 	 
	 	 
	 	Guillermo Sierra
	 	 
	 	 
	 	Siggi Meissner
	 	 
	 	 
	 	Maria Jelescu Dreyfus
	 	 
	 	 
	 	Colleen Calhoun
	 	 
	 	 
	 	Jennifer Gill Roberts
	 	 

Acknowledged and Agreed:

 

NABORS ENERGY TRANSITION CORP.

 

	By:	 	 
	Name:	Anthony G. Petrello	 
	Title:	President, Chief Executive Officer, Secretary and Director	 

 

[Signature Page to Letter Agreement]

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