<SEC-DOCUMENT>0001193125-23-173801.txt : 20230623
<SEC-HEADER>0001193125-23-173801.hdr.sgml : 20230623
<ACCEPTANCE-DATETIME>20230623160526
ACCESSION NUMBER:		0001193125-23-173801
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230623
DATE AS OF CHANGE:		20230623

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEXTIER OILFIELD SOLUTIONS INC.
		CENTRAL INDEX KEY:			0001688476
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL, GAS FIELD SERVICES, NBC [1389]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90043
		FILM NUMBER:		231037676

	BUSINESS ADDRESS:	
		STREET 1:		3990 ROGERDALE RD.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77042
		BUSINESS PHONE:		713-325-6000

	MAIL ADDRESS:	
		STREET 1:		3990 ROGERDALE RD.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77042

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Keane Group, Inc.
		DATE OF NAME CHANGE:	20161025

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PATTERSON UTI ENERGY INC
		CENTRAL INDEX KEY:			0000889900
		STANDARD INDUSTRIAL CLASSIFICATION:	DRILLING OIL & GAS WELLS [1381]
		IRS NUMBER:				752504748
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D

	BUSINESS ADDRESS:	
		STREET 1:		10713 WEST SAM HOUSTON PARKWAY NORTH
		STREET 2:		SUITE 800
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77064
		BUSINESS PHONE:		2817657100

	MAIL ADDRESS:	
		STREET 1:		10713 WEST SAM HOUSTON PARKWAY NORTH
		STREET 2:		SUITE 800
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77064

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PATTERSON ENERGY INC
		DATE OF NAME CHANGE:	19940228
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>d437739dsc13d.htm
<DESCRIPTION>SC 13D
<TEXT>
<HTML><HEAD>
<TITLE>SC 13D</TITLE>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Washington, D.C. 20549 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SCHEDULE 13D
</B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Under the Securities Exchange Act of 1934 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>(Amendment No. N/A)* </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:22pt; font-family:Times New Roman" ALIGN="center"><B>NexTier
Oilfield Solutions Inc. </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Name of Issuer) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Common Stock, $0.01 par value </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Title of Class&nbsp;of Securities) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>65290C105 </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(CUSIP Number)
</B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Seth D. Wexler </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Senior Vice President, General Counsel and Secretary </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Energy, Inc. </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>10713 W. Sam Houston Pkwy N, Suite 800 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Houston, TX 77064 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><I>with a copy to: </I></B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Tull R. Florey </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Gibson,
Dunn&nbsp;&amp; Crutcher LLP </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>811 Main Street, Suite 3000 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Houston, TX 77002 </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(346) <FONT
STYLE="white-space:nowrap">718-6600</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Name, Address and Telephone Number of Person Authorized to Receive Notices and
Communications) </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>June&nbsp;14, 2023 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Date of Event which Requires Filing of this Statement) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">If the filing person has
previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of &#167;&#167; <FONT STYLE="white-space:nowrap">240.13d-1(e),</FONT>
<FONT STYLE="white-space:nowrap">240.13d-1(f)</FONT> or <FONT STYLE="white-space:nowrap">240.13d-1(g),</FONT> check the following box.&nbsp;&nbsp;&#9744; </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">*</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The remainder of this cover page shall be filled out for a reporting person&#146;s initial filing on this form
with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. </P></TD></TR></TABLE>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The information required in the remainder of this cover page shall not be deemed to be &#147;filed&#148; for the purpose of Section&nbsp;18 of the Securities
Exchange Act of 1934 (the &#147;Exchange Act&#148;) or otherwise subject to the liabilities of that section of the Exchange Act, but shall be subject to all other provisions of the Exchange Act (however, see the Notes). </P>
<P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>
</DIV></Center>


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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">CUSIP NO. 65290C105 </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="6%"></TD>

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<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">&nbsp;&nbsp;1&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt">
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Name of Reporting Person</P> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Patterson-UTI Energy, Inc.</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">&nbsp;&nbsp;2</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Check the Appropriate Box
if a Member of a Group</P> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;(a):&nbsp;&nbsp;&#9744;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b):&nbsp;&nbsp;&#9744;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">&nbsp;&nbsp;3</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;SEC Use Only</P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:1pt">&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">&nbsp;&nbsp;4</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Source of Funds (See
Instructions)</P> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;OO (See Item 3)</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">&nbsp;&nbsp;5</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Check Box if Disclosure of
Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e):</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&#9744;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">&nbsp;&nbsp;6</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Citizenship or Place of
Organization</P> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Delaware</P></TD></TR></TABLE>
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<TR>

<TD WIDTH="2%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="6%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="3%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="86%"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="middle" COLSPAN="3" ROWSPAN="4" STYLE="BORDER-LEFT:1px solid #000000; padding-left:8pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Number&nbsp;of</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Shares</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">&nbsp;Beneficially&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Owned&nbsp;by</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Each</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Reporting</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Person</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">with</P> <P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:1pt" align="left">&nbsp;</P></TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;7&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Sole Voting Power</P>
<P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;0</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;8</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Shared Voting Power</P>
<P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;32,330,828 (1)(2)</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;9</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Sole Dispositive Power</P>
<P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;0</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top">10</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Shared Dispositive Power</P>
<P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;0</P></TD></TR></TABLE>
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<TR>

<TD WIDTH="4%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="6%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="87%"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">11&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt">
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Aggregate Amount Beneficially Owned by Each Reporting Person</P> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;32,330,828 (1)(2)</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">12</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Check if the Aggregate
Amount in Row (11) Excludes Certain Shares</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&#9744;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">13</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Percent of Class
Represented by Amount in Row (11)</P> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;14.2% (3)</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">14</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="5" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;Type of Reporting
Person</P> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;CO</P></TD></TR>
</TABLE> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(1)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Consists of 32,330,828 shares of NexTier Common Stock (as defined in Item 1 herein) of the Issuer (as defined
in Item 1 herein) held by the Keane Investor (as defined in Item 3 herein). </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(2)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The Reporting Person (as defined in Item 2 herein) does not own any shares of NexTier Common Stock. However,
because the Reporting Person is a party to the Support Agreement (as defined in Item 3 herein) and was granted a proxy to vote the shares of NexTier Common Stock held by the Keane Investor pursuant to such agreement, the Reporting Person may be
deemed to have shared voting power to vote up to an aggregate of 32,330,828 shares of NexTier Common Stock with respect to the matters covered by the Support Agreement. Neither the filing of this statement on Schedule 13D nor any of its contents
shall be construed as an admission that the Reporting Person is, for the purposes of Section&nbsp;13(d) or 13(g) of the Exchange Act (as defined in Item 4 herein), the beneficial owner of any of the shares of NexTier Common Stock referred to herein.
Pursuant to Rule <FONT STYLE="white-space:nowrap">13d-4,</FONT> the Reporting Person disclaims all such beneficial ownership. </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(3)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Calculation of percentage is based on 32,330,828 shares of NexTier Common Stock held by the Keane Investor
divided by 228,209,888 shares of NexTier Common Stock issued and outstanding as of June&nbsp;14, 2023 as represented by the Issuer in the Merger Agreement (as defined in Item 3 herein). </P></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">2/10 </P>

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<TD WIDTH="11%" VALIGN="top" ALIGN="left"><B>Item&nbsp;1.</B></TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><B>Security and Issuer. </B></P></TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This Schedule 13D relates to the common stock, par value $0.01 per share (&#147;NexTier Common Stock&#148;), of NexTier Oilfield Solutions
Inc., a Delaware corporation (&#147;NexTier&#148; or the &#147;Issuer&#148;). The principal executive offices of NexTier are located at 3990 Rogerdale Rd., Houston, Texas 77042. </P>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left"><B>Item&nbsp;2.</B></TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><B>Identity and Background. </B></P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">a.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">This Schedule 13D is being filed by <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Energy, Inc., a
Delaware corporation <FONT STYLE="white-space:nowrap">(&#147;Patterson-UTI&#148;</FONT> or the &#147;Reporting Person&#148;). </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">b.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The principal business address of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> is 10713 W. Sam Houston
Pkwy N, Suite 800, Houston, Texas 77064. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">c.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><FONT STYLE="white-space:nowrap">Patterson-UTI&#146;s</FONT> principal business is the provision of onshore
contract drilling, pressure pumping and directional drilling services. </P></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:11%; font-size:10pt; font-family:Times New Roman">The name, present principal occupation or
employment (and the name, principal business and address of any corporation or other organization in which such employment is conducted) and citizenship of each director and executive officer, as applicable, of the Reporting Person is set forth on
Schedule A, which is incorporated by reference herein. </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">d.-&nbsp;e.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">During the last five years, none of the Reporting Person or, to the knowledge of the Reporting Person, any of
the persons listed on Schedule A attached hereto have been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors) or been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction
and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to
such laws. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">f.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">As set forth in Schedule A hereto, each of the directors and executive officers of the Reporting Person is a
United States citizen, except for Cesar Jaime, who is a citizen of Colombia. </P></TD></TR></TABLE> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left"><B>Item&nbsp;3.</B></TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><B>Source and Amount of Funds or Other Consideration. </B></P></TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">On June&nbsp;14, 2023, <FONT STYLE="white-space:nowrap">Patterson-UTI,</FONT> Pecos Merger Sub Inc., a Delaware corporation and wholly owned
subsidiary of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> (&#147;Merger Sub Inc.&#148;), and Pecos Second Merger Sub LLC, a Delaware limited liability company and wholly owned subsidiary of
<FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> (&#147;Merger Sub LLC&#148;), entered into an Agreement and Plan of Merger (the &#147;Merger Agreement&#148;) with NexTier pursuant to which, through a series of mergers, NexTier will become a
wholly owned subsidiary of <FONT STYLE="white-space:nowrap">Patterson-UTI,</FONT> and each share of NexTier Common Stock will be exchanged for 0.7520 shares of common stock, par value $0.01 per share, of
<FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> (the <FONT STYLE="white-space:nowrap">&#147;Patterson-UTI</FONT> Common Stock&#148;). </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">In connection with the Merger Agreement, Keane Investor Holdings LLC, a Delaware limited liability company (the &#147;Keane Investor&#148;),
which beneficially owns 32,330,828 shares of NexTier Common Stock, and Cerberus Capital Management, L.P., a Delaware limited partnership (&#147;Cerberus&#148;), entered into a Support Agreement and Irrevocable Proxy (the &#147;Support
Agreement&#148;), dated June&nbsp;14, 2023, with <FONT STYLE="white-space:nowrap">Patterson-UTI.</FONT> The Support Agreement includes covenants as to the voting of shares of NexTier Common Stock held by the Keane Investor in a manner to facilitate
the consummation of the Mergers (as defined in Item 4 herein). </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">3/10 </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The shares of NexTier Common Stock to which this Schedule 13D relates have not been
purchased by the Reporting Person, and no funds were expended in consideration for the execution of either the Merger Agreement or the Support Agreement. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The information set forth or incorporated by reference in Item 4 is incorporated by reference in this Item 3. </P>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left"><B>Item&nbsp;4.</B></TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><B>Purpose of Transaction. </B></P></TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(a)-(j) </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B><I>Merger Agreement </I></B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Under the terms of, and subject to the conditions set forth in, the Merger Agreement, (i)&nbsp;Merger Sub Inc. will merge with and into
NexTier, with NexTier continuing as the surviving entity (the &#147;Surviving Corporation&#148;) (the &#147;First Company Merger&#148;) and (ii)&nbsp;immediately following the First Company Merger, the Surviving Corporation will merge with and into
Merger Sub LLC, with Merger Sub LLC continuing as the surviving entity (the &#147;Second Company Merger&#148; and, together with the First Company Merger, the &#147;Mergers&#148;). Under the terms of the Merger Agreement and as more fully described
below, at the effective time of the Mergers (the &#147;Effective Time&#148;), subject to certain exceptions, each share of NexTier Common Stock issued and outstanding immediately prior to the Effective Time (including each outstanding NexTier
restricted stock award) will be converted into the right to receive 0.7520 shares of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Common Stock (the &#147;Exchange Ratio&#148;). Each share of NexTier Common Stock held in treasury by NexTier
or owned directly or indirectly by <FONT STYLE="white-space:nowrap">Patterson-UTI,</FONT> Merger Sub Inc. or Merger Sub LLC will be automatically cancelled and will cease to exist, and no consideration will be issued therefor. Upon consummation of
the Mergers and the other transactions contemplated by the Merger Agreement (the &#147;Transactions&#148;), NexTier will be a wholly owned subsidiary of <FONT STYLE="white-space:nowrap">Patterson-UTI.</FONT> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The closing of the Transactions is subject to the satisfaction or waiver of certain closing conditions, including, among others, (i)&nbsp;the
adoption of the Merger Agreement by holders of a majority of the outstanding shares of NexTier Common Stock, (ii)&nbsp;the approval of the <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> charter amendment by the holders of a majority of the
outstanding shares of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Common Stock, (iii)&nbsp;the approval of the share issuance by the holders of shares of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Common Stock representing a
majority of votes cast thereon, (iv)&nbsp;the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act having expired or been terminated, and there being no written agreement in effect with any governmental entity not to
consummate the Transactions, (v)&nbsp;there being no law, injunction or order by a governmental body prohibiting the consummation of the Mergers, (vi)&nbsp;the approval for listing of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Common
Stock to be issued in accordance with the terms of the Merger Agreement on the Nasdaq, (vii)&nbsp;the registration statement on Form <FONT STYLE="white-space:nowrap">S-4,</FONT> to be filed with the United States Securities and Exchange Commission
(the &#147;SEC&#148;) by <FONT STYLE="white-space:nowrap">Patterson-UTI,</FONT> having been declared effective by the SEC, (viii)&nbsp;subject to specified materiality standards, the accuracy of the representations and warranties of the other party,
and (ix)&nbsp;compliance by each other party in all material respects with their respective covenants. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The foregoing summary of the
Merger Agreement does not purport to be a complete description of the terms and conditions of such agreement, and such description is qualified in its entirety by reference to the full text of the Merger Agreement, a copy of which is attached hereto
as Exhibit A. The foregoing summary of the Merger Agreement has been included to provide investors and securityholders with information regarding the terms of the Merger Agreement and is not intended to provide any other factual information about
the Issuer, the Reporting Person or their respective subsidiaries and affiliates. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The representations, warranties and covenants contained
in the Merger Agreement have been made solely for the benefit of the parties thereto. In addition, such representations, warranties and covenants (i)&nbsp;have been made only for purposes of the Merger Agreement, (ii)&nbsp;have been qualified by
(a)&nbsp;matters specifically disclosed in any reports filed by <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> or NexTier with the SEC prior to the date of the Merger Agreement (subject to certain
</P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">4/10 </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
exceptions) and (b)&nbsp;confidential disclosures made in confidential disclosure letters delivered in connection with the Merger Agreement, (iii)&nbsp;are subject to materiality qualifications
contained in the Merger Agreement which may differ from what may be viewed as material by investors, (iv)&nbsp;were made only as of the date of the Merger Agreement or such other date as is specified in the Merger Agreement and (v)&nbsp;have been
included in the Merger Agreement for the purpose of allocating risk between the contracting parties rather than establishing matters as fact. Accordingly, the Merger Agreement is included with this filing only to provide investors with information
regarding the terms of the Merger Agreement, and not to provide investors with any other factual information regarding the parties thereto or their respective businesses. Investors should not rely on the representations, warranties and covenants or
any descriptions thereof as characterizations of the actual state of facts or condition of the parties to the Merger Agreement or any of their respective subsidiaries or affiliates. Moreover, information concerning the subject matter of the
representations and warranties may change after the date of the Merger Agreement, which subsequent information may or may not be fully reflected in <FONT STYLE="white-space:nowrap">Patterson-UTI&#146;s</FONT> or NexTier&#146;s public disclosures.
The Merger Agreement should not be read alone, but should instead be read in conjunction with the other information regarding <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> and NexTier that is or will be contained in, or incorporated by
reference into, the Annual Reports on Form <FONT STYLE="white-space:nowrap">10-K,</FONT> Quarterly Reports on Form <FONT STYLE="white-space:nowrap">10-Q</FONT> and other documents that <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> or NexTier
files with the SEC. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B><I>Support Agreement </I></B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">In connection with the Merger Agreement, the Keane Investor, holding approximately 14.2% of the voting power of NexTier, and Cerberus entered
into the Support Agreement with <FONT STYLE="white-space:nowrap">Patterson-UTI,</FONT> a copy of which is filed hereto as Exhibit B. The Keane Investor has agreed to vote any shares of NexTier Common Stock that it beneficially owns at the time of
the NexTier stockholders meeting called to adopt the Merger Agreement in a manner to facilitate the consummation of the Mergers. The voting obligation of the Keane Investor under the Support Agreement terminates upon the earlier of (i)&nbsp;the
termination of the Merger Agreement, (ii)&nbsp;an amendment to the Merger Agreement that decreases the Exchange Ratio or is otherwise materially adverse to the Keane Investor, (iii)&nbsp;a change of recommendation by the NexTier board of directors
in compliance with the terms and conditions of the applicable provisions of the Merger Agreement or (iv)&nbsp;the day following the Effective Time. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">As of the date hereof, the Reporting Person does not own any shares of NexTier Common Stock. However, because of the Keane Investor&#146;s
obligations under the Support Agreement pursuant to which the Keane Investor granted a proxy to vote its shares of NexTier Common Stock to the Reporting Person, the Reporting Person may be deemed to have shared voting power over such shares of
NexTier Common Stock. Thus, for purposes of Rule <FONT STYLE="white-space:nowrap">13d-3</FONT> promulgated under the Securities Exchange Act of 1934, as amended (the &#147;Exchange Act&#148;), the Reporting Person may be deemed to be the beneficial
owner of certain shares of NexTier Common Stock. Neither the filing of this statement on Schedule 13D nor any of its contents shall be construed as an admission that the Reporting Person is, for the purposes of Section&nbsp;13(d) or 13(g) of the
Exchange Act, the beneficial owner of any of the shares of NexTier Common Stock referred to herein. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The foregoing description of the
Support Agreement is not intended to be complete and is qualified in its entirety by reference to the full text of the Support Agreement, a copy of which is filed hereto as Exhibit B. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The Transactions may, if consummated in accordance with their terms, result in any or all of the actions contemplated by subparagraphs (a)-(j)
of Item 4 of Schedule 13D, including, without limitation, (i)&nbsp;that, as a result of the Mergers, the Issuer will become a wholly owned subsidiary of the Reporting Person, (ii)&nbsp;the integration of the current
<FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> board of directors and current NexTier board of directors such that the <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> board of directors at the consummation of the Transactions consists
of six current directors of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> and five current directors of NexTier, (iii)&nbsp;material changes in the capitalization, dividend policy, corporate structure and organizational documents of NexTier
and (iv)&nbsp;the termination of the registration of the NexTier Common Stock under Section&nbsp;12(g) of the Exchange Act. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">5/10 </P>

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<Center><DIV STYLE="width:8.5in" align="left">

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left"><B>Item&nbsp;5.</B></TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><B>Interest in Securities of the Issuer. </B></P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">a.&nbsp;-&nbsp;b.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The response of the Reporting Person to rows 7 through 13 (including the footnotes) on the cover page of this
Schedule 13D are incorporated by reference herein.As of the date hereof, the Reporting Person does not own any shares of NexTier Common Stock. However, as a result of the Support Agreement, the Reporting Person may be deemed to have shared voting
power with respect to up to an aggregate of 32,330,828 shares of NexTier Common Stock, and thus, for the purpose of Rule <FONT STYLE="white-space:nowrap">13d-3</FONT> promulgated under the Exchange Act, the Reporting Person may be deemed to be the
beneficial owner of an aggregate of 32,330,828 shares of NexTier Common Stock. The aggregate number of shares of NexTier Common Stock covered by the Support Agreement represents approximately 14.2% of the outstanding NexTier Common Stock as more
fully described in footnote (3)&nbsp;on the cover page of this Schedule 13D. </P></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:11%; font-size:10pt; font-family:Times New Roman">The filing of this statement on Schedule
13D shall not be construed as an admission that the Reporting Person is, for the purposes of Section&nbsp;13(d) or 13(g) of the Exchange Act, the beneficial owner of any shares of NexTier Common Stock. Pursuant to Rule
<FONT STYLE="white-space:nowrap">13d-4,</FONT> the Reporting Person disclaims all such beneficial ownership. </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:11%; font-size:10pt; font-family:Times New Roman">To the Reporting
Person&#146;s knowledge, none of the persons listed in Schedule A hereto beneficially own any shares of NexTier Common Stock. </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">c.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Except for the foregoing transactions and as set forth in this Schedule 13D with reference to the Merger
Agreement and the Support Agreement, neither the Reporting Person nor, to the Reporting Person&#146;s knowledge, any of the persons listed in Schedule A hereto, has effected any transaction in shares of NexTier Common Stock during the past 60 days.
</P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">d.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The Reporting Person has no right to receive dividends from, or the proceeds from the sale of, any shares of
NexTier Common Stock subject to the Support Agreement. The Reporting Person will have no pecuniary interest in any shares of NexTier Common Stock unless and until the Transactions are consummated. </P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">e.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Not applicable. </P></TD></TR></TABLE> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left"><B>Item&nbsp;6.</B></TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><B>Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.
</B></P></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The information set forth or incorporated by reference in Item 4 is incorporated by reference in this Item 6. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The Reporting Person entered into a Confidentiality Agreement, dated as of May&nbsp;5, 2023, with NexTier (the &#147;Confidentiality
Agreement&#148;) pursuant to which each party agreed to certain restrictions with respect to certain nonpublic information regarding the other party. In addition, the Confidentiality Agreement provides that, for a period of two years from the date
thereof, without the prior written consent or invitation of the other party&#146;s board of directors, neither party nor any of its representatives shall, directly or indirectly: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">(a)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">effect or seek, offer or propose (whether publicly or otherwise) to effect, or cause or participate in or in
any way assist any other person to effect or seek, offer or propose (whether publicly or otherwise) to effect or participate in: </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">i.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">any acquisition of ownership (including, but not limited to, any voting right or beneficial ownership as
defined in Rule <FONT STYLE="white-space:nowrap">13d-3</FONT> under the Exchange Act) of any securities of the Standstill Protected Party (as defined below) or any option, forward contract, swap or other position with a value derived from securities
of the Standstill Protected Party or conveying the right to acquire or vote securities of the Standstill Protected Party, or any ownership of any of the material assets or businesses of the Standstill Protected Party; </P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">ii.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">any merger, amalgamation, arrangement or other business combination or takeover bid, tender or exchange offer
involving the Standstill Protected Party; </P></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">6/10 </P>

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<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">iii.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">any recapitalization, restructuring, liquidation, dissolution or other extraordinary transaction with respect
to the Standstill Protected Party; or </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">iv.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">any &#147;solicitation&#148; of &#147;proxies&#148; (as such terms are used in the proxy rules of the SEC) or
consents to vote or otherwise with respect to any voting securities of the Standstill Protected Party, or make any communication exempted from the definition of &#147;solicitation&#148; by Rule <FONT STYLE="white-space:nowrap">14a-1(1)(2)(iv)</FONT>
under the Exchange Act; </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">(b)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">form, join or in any way participate in a &#147;group&#148; (as defined under the Exchange Act) with respect to
the Standstill Protected Party; </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">(c)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">otherwise act, alone or in concert with others, to seek to control or influence the management, board of
directors or policies of the Standstill Protected Party; </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">(d)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">have any discussions or enter into any arrangements, understandings or agreements (oral or written) with, or
advise, finance, assist or encourage, any third party with respect to any of the matters described above; </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">(e)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">take any action which might cause or require either party to make, or which might result in, a public
announcement or other public disclosure regarding any of the types of matters described above; or </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="6%" VALIGN="top" ALIGN="left">(f)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">disclose any intention, plan or arrangement that, if executed, would be prohibited by any of the matters
described above. </P></TD></TR></TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">For purposes hereof, &#147;Standstill Protected Party&#148; means
<FONT STYLE="white-space:nowrap">(i)&nbsp;Patterson-UTI</FONT> as it relates to the obligations of NexTier and its representatives, and (ii)&nbsp;NexTier as it relates to the obligations of <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> and
its representatives. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Each party further agreed that (a)&nbsp;communications regarding a possible negotiated strategic business
combination transaction between NexTier and <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> approved by their respective board of directors (a &#147;Possible Transaction&#148;), (b) requests for additional information, (c)&nbsp;requests for
management meetings or facility tours and (d)&nbsp;discussions or questions regarding procedures, in each case, with respect to a Possible Transaction, will be submitted or directed to such person as may be designated in writing by such party. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Under the terms of the Confidentiality Agreement, the restrictions in (a)-(f) above do not restrict a party or any of its representatives from
making any proposal regarding a Possible Transaction directly to the chief executive officer or board of directors of the other party if such proposal and applicable law or stock exchange rules do not require any party to make a public announcement
regarding the Confidentiality Agreement, a Possible Transaction or any of the matters described in (a)-(f) above. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The standstill
restrictions listed above automatically terminate without further action and will be of no further force and effect, upon the earliest to occur of the following: (a)&nbsp;two years following the date of the Confidentiality Agreement or (b)&nbsp;the
Standstill Protected Party entering into a definitive agreement contemplating either (i)&nbsp;(A) a person or group (within the meaning of Section&nbsp;13(d) under the Exchange Act) acquiring, directly or indirectly, securities representing more
than 50% of the voting power of the outstanding securities of the Standstill Protected Party or properties or assets constituting more than 50% of the consolidated assets of such party, (B)&nbsp;a merger or other business combination such that
holders of voting securities of such Standstill Protected Party immediately prior to the transaction do not own 50% or more of the voting power of securities of the resulting entity, (C)&nbsp;insolvency, filing for bankruptcy or reorganizing in
connection with a bankruptcy or insolvency proceeding of NexTier or <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> or (ii)&nbsp;a tender or exchange offer by a third person for any voting securities of the Standstill Protected Party, which,
if consummated, would result in the actions described in the foregoing clauses (A)-(C). </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">7/10 </P>

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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Except for the Confidentiality Agreement, the Merger Agreement and the Support Agreement
described above, to the knowledge of the Reporting Person, there are no contracts, arrangements, understandings or relationships (legal or otherwise) among the persons named in Item 2 or between such persons and any other person, with respect to any
securities of the Issuer, including any securities pledged or otherwise subject to a contingency the occurrence of which would give another person voting power or investment power over such securities other than standard default and similar
provisions contained in loan agreements. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left"><B>Item&nbsp;7.</B></TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><B>Material to be Filed as Exhibits. </B></P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left">Exhibit&nbsp;A.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><A HREF="http://www.sec.gov/Archives/edgar/data/889900/000119312523167408/d494894dex21.htm">Agreement and Plan of
 Merger, dated as of June&nbsp;14, 2023, among NexTier, the Reporting Person, Merger Sub Inc., and Merger Sub LLC (incorporated by reference to Exhibit 2.1 to the Reporting Person&#146;s Current Report on Form
<FONT STYLE="white-space:nowrap">8-K</FONT> (File <FONT STYLE="white-space:nowrap">No.&nbsp;001-39270)</FONT> filed with the Commission on June&nbsp;15, 2023).</A> </P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="11%" VALIGN="top" ALIGN="left">Exhibit&nbsp;B.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><A HREF="http://www.sec.gov/Archives/edgar/data/889900/000119312523167408/d494894dex101.htm">Support Agreement and
 Irrevocable Proxy, dated as of June&nbsp;14, 2023, among the Reporting Person, Keane Investor and Cerberus (incorporated by reference to Exhibit 10.1 to the Reporting Person&#146;s Current Report on Form <FONT STYLE="white-space:nowrap">8-K</FONT>
(File <FONT STYLE="white-space:nowrap">No.&nbsp;001-39270)</FONT> filed with the Commission on June&nbsp;15, 2023). </A> </P></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">8/10 </P>

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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>SIGNATURE </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true,
complete and correct. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR>

<TD WIDTH="44%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="4%"></TD>

<TD VALIGN="bottom"></TD>
<TD WIDTH="5%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="44%"></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="3" NOWRAP><FONT STYLE="white-space:nowrap">PATTERSON-UTI</FONT> ENERGY, INC.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">Dated: June&nbsp;23, 2023</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">By:</TD>
<TD VALIGN="bottom" STYLE=" BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="bottom" STYLE="BORDER-BOTTOM:1px solid #000000">/s/ C. Andrew Smith</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">C. Andrew Smith</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Executive Vice President and Chief Financial Officer</TD></TR>
</TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">9/10 </P>

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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>SCHEDULE A </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The name, title, present principal occupation or employment of each of the directors and executive officers of
<FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Energy, Inc. <FONT STYLE="white-space:nowrap">(&#147;Patterson-UTI&#148;),</FONT> are set forth below. Each <FONT STYLE="white-space:nowrap">non-management</FONT> director&#146;s business address
is c/o <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Energy, Inc., 10713 W. Sam Houston Pkwy N, Suite 800, Houston, Texas 77064, and each executive officer&#146;s business address is 10713 W. Sam Houston Pkwy N, Suite 800, Houston, Texas
77064. All of the individuals listed below are citizens of the United States, except for Cesar Jaime, who is a citizen of Colombia. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B><U>Directors</U>:
</B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD WIDTH="35%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="32%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="31%"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom" NOWRAP> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; display:table-cell; font-size:8pt; font-family:Times New Roman; "><B>Name</B></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Position at
<FONT STYLE="white-space:nowrap">Patterson-UTI</FONT></B></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Present Principal<BR>Occupation
or<BR>Employment</B></P></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">William A. Hendricks, Jr.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director, President and Chief Executive Officer</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">President and Chief Executive Officer, <FONT STYLE="white-space:nowrap">Patterson-UTI</FONT> Energy, Inc.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Curtis W. Huff</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Chairman of the Board; Director</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Chairman, Freebird Partners</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Tiffany Thom Cepak</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director, Ranger Oil Corporation; Director, California Resources Corporation</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Michael W. Conlon</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Retired Partner, Norton Rose Fulbright US LLP</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Terry H. Hunt</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Energy Consultant</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Cesar Jaime</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Retired, Schlumberger Management; Private Company Director</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Janeen S. Judah</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Retired, Chevron Management</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Julie J. Robertson</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Director</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Retired, Noble Corporation Management; Public Company Director</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B><U>Executive Officers (Who Are Not Directors)</U></B>: </P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD WIDTH="19%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="80%"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom" NOWRAP> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; display:table-cell; font-size:8pt; font-family:Times New Roman; "><B>Name</B></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Present Principal Occupation or Employment</B></P></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">C. Andrew Smith</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Executive Vice President and Chief Financial Officer</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Kenneth N. Berns</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Executive Vice President and Chief Commercial Officer</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Seth D. Wexler</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Senior Vice President, General Counsel and Secretary</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">James M. Holcomb</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Chief Operating Officer</TD></TR>
</TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">10/10 </P>

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