EX-21.1 3 pten-ex211_11.htm EX-21.1 pten-ex211_11.htm

Exhibit 21.1

Subsidiaries of the Registrant

 

Name

 

State of

Incorporation or

organization

Ambar Lone Star Fluid Services LLC

 

Texas

Current Power Solutions, Inc.

 

Texas

Drilling Technologies 1 LLC

 

Delaware

Drilling Technologies 2 LLC

 

Delaware

Great Plains Oilfield Rental, L.L.C.

 

Oklahoma

Keystone Rock & Excavation, L.L.C.

 

Oklahoma

MS Directional, LLC

 

Texas

Patterson Petroleum LLC

 

Texas

Patterson UTI Energy Arabia DMCC

 

Dubai Multi Commodities Centre

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 Global Resources Management Office Limited

 

Dubai International Financial Centre

Patterson-UTI International (Netherlands) B.V.

 

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, Inc.

 

Delaware

Patterson-UTI International (India) B.V.

 

The Netherlands

Patterson-UTI International (Kuwait) Limited

 

British Virgin Islands

Patterson-UTI Management Services, LLC

 

Delaware

PTL Prop Solutions, L.L.C.

 

Oklahoma

Seventy Seven Energy LLC

 

Delaware

Seventy Seven Land Company LLC

 

Oklahoma

Seventy Seven Operating LLC

 

Oklahoma

Superior QC, LLC

 

Delaware

Universal Pressure Pumping, Inc.

 

Delaware

Warrior Rig Technologies Limited

 

Alberta

Warrior Rig Technologies US LLC

 

Delaware

Western Wisconsin Sand Company, LLC

 

Wisconsin