Type	Name	Date
Credit agreement	Amendment No. 2 to Amended and Restated Credit Agreement, among Patterson-UTI Energy, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, letter of credit issuer, swing line lender and lender and each of the other letter of credit issuers and lenders party thereto	03/27/2020
Indenture	First Supplemental Indenture, between Patterson-UTI Energy, Inc. and U.S. Bank National Association, as trustee	11/15/2019
Credit agreement	Amendment No. 1 to Amended and Restated Credit Agreement, among Patterson-UTI Energy, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, letter of credit issuer, swing line lender and lender and each of the other letter of credit issuers and lenders party thereto	03/26/2019
Credit agreement	Amended and Restated Credit Agreement among Patterson-UTI Energy, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, letter of credit issuer, swing line lender and lender and each of the other letter of credit issuers and lenders party thereto	03/27/2018
Indenture	First Supplemental Indenture, among Patterson-UTI Energy, Inc., the several guarantors named therein and Wells Fargo Bank, National Association, as trustee	01/19/2018
Registration rights agreement	Registration Rights Agreement, among Patterson-UTI Energy, Inc., the several guarantors named therein and Goldman, Sachs & Co. LLC, Wells Fargo Securities, LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated	01/19/2018
Credit agreement	Amendment No. 4 to Credit Agreement, by and among Patterson-UTI, certain subsidiaries of Patterson-UTI party thereto, Wells Fargo Bank, N.A., as administrative agent, issuer of letter of credit and swing line lender and the other lenders party thereto	04/21/2017
Credit agreement	Amendment No. 2 to Credit Agreement, by and among the Company, certain subsidiaries of the Company party thereto, Wells Fargo Bank, N.A., as administrative agent, issuer of letters of credit and swing line lender and the other lenders party thereto	07/12/2016
Credit agreement	Amendment No. 1 to Credit Agreement, by and among the Company, certain subsidiaries of the Company party thereto, Wells Fargo Bank, N.A., as administrative agent, issuer of letters of credit and swing line lender and the other lenders thereto	01/12/2015
Credit agreement	Credit Agreement among Patterson-UTI Energy, Inc., as borrower, Wells Fargo Bank, N.A., as administrative agent, letter of credit issuer, swing line lender and lender and each of the other letter of credit issuer and lender parties thereto	09/28/2012
Note and security agreement	Note Purchase Agreement by and among the Company and the purchasers named therein	10/06/2010

Type	Name	Date
Employment agreement	Employment Agreement, between Patterson-UTI Management Services, LLC and Mark S. Siegel	04/09/2020
Employment agreement	Employment Agreement, between Patterson-UTI Energy, Inc. and John E. Vollmer III	12/27/2017
Employment agreement	Employment Agreement, between Patterson-UTI Energy, Inc. and John E. Vollmer III	12/27/2017
Employment agreement	Employment Agreement, between Patterson-UTI Energy, Inc. and C. Andrew Smith	09/08/2017
Equity incentive plans	Patterson-UTI Energy, Inc. 2014 Long-Term Incentive Plan	06/30/2017
Employment agreement	Employment Agreement between Patterson-UTI Drilling Company LLC and James M. Holcomb	01/17/2017
Employment agreement	Employment Agreement between Patterson-UTI Drilling Company LLC and James M. Holcomb	01/17/2017
Equity incentive plans	Patterson-UTI Energy, Inc. 2014 Long-Term Incentive Plan	04/21/2014
Equity incentive plans	Third Amendment to the Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan	04/27/2010
Equity incentive plans	Fourth Amendment to the Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan	04/27/2010

Type	Name	Date
Merger agreement	Agreement and Plan of Merger by and among Patterson-UTI Energy, Inc., Pyramid Merger Sub, Inc. and Seventy Seven Energy Inc.	12/13/2016