Attached files

file filename
10-K - 10-K - PATTERSON UTI ENERGY INCpten-10k_20151231.htm
EX-32.1 - EX-32.1 - PATTERSON UTI ENERGY INCpten-ex321_9.htm
EX-31.1 - EX-31.1 - PATTERSON UTI ENERGY INCpten-ex311_8.htm
EX-31.2 - EX-31.2 - PATTERSON UTI ENERGY INCpten-ex312_7.htm
EX-23.1 - EX-23.1 - PATTERSON UTI ENERGY INCpten-ex231_10.htm
EX-99.1 - EX-99.1 - PATTERSON UTI ENERGY INCpten-ex991_1072.htm

Exhibit 21.1

Subsidiaries of the Registrant

 

Name

 

State of

Incorporation or

organization

Ambar Lone Star Fluid Services LLC

 

Texas

Patterson Petroleum LLC

 

Texas

Patterson UTI Energy Arabia DMCC

 

UAE

Patterson UTI International Saudi Arabia Limited

 

Kingdom of Saudi Arabia

Patterson-UTI Drilling Canada Limited

 

Nova Scotia

Patterson-UTI Drilling Company LLC

 

Texas

Patterson-UTI Drilling International, Inc.

 

Delaware

Patterson-UTI International (Netherlands) Coöperatief U.A.

 

The Netherlands

Patterson-UTI International Holdings (BVI) Limited

 

British Virgin Islands

Patterson-UTI International Holdings (Netherlands) One B.V.

 

The Netherlands

Patterson-UTI International Holdings (Netherlands) Two B.V.

 

The Netherlands

Patterson-UTI International Holdings GP (BVI), Inc.

 

British Virgin Islands

Patterson-UTI International Holdings GP 1 LLC

 

Delaware

Patterson-UTI International Holdings, Inc.

 

Delaware

Patterson-UTI International (Kuwait) Limited

 

British Virgin Islands

Patterson-UTI Management Services, LLC

 

Delaware

PTEN International Holdings (Netherlands) 1 C.V.

 

The Netherlands

PTEN International Leasing (Netherlands) 2 C.V.

 

The Netherlands

Universal Pressure Pumping, Inc.

 

Delaware

Universal Well Services, Inc.

 

Delaware