EX-21.1 46 o69608exv21w1.htm EX-21.1

exv21w1

Exhibit 21.1

Subsidiaries of Precision Drilling Corporation

Alberta, Canada

1198430 Alberta Ltd.
Arrowstar Drilling Partnership
Canadian Waste Management Inc.
Four Lakes Precision Drilling Limited Partnership
Grey Wolf Global Employment Corporation
Peritus International Oilfield Services Ltd.
Precision Diversified Oilfield Services Corp.
Precision Drilling Canada Limited Partnership
Precision Limited Partnership
Precision Oilfield Personnel Services Ltd.
Sierra Drill Manufacturing Ltd.

California

Precision Bolting, Inc.

Canada (federal)

Grey Wolf International Drilling Corporation

Delaware

Kenting Inc.
Murco Drilling Corporation
Precision Completion & Production Services Ltd.
Precision Drilling, Inc.

Louisiana

Precision Drilling LLC

Nevada

Grey Wolf Mexico Holdings LLC

 2 

Precision Drilling Holdings Company

Texas

DI Energy, Inc.
DI/Perfensa Inc.
Grey Wolf International, Inc.
Grey Wolf Supply Inc.
Precision Directional Services, Inc.
Precision Drilling Company LP
Precision Drilling Oilfield Services Corporation

Yukon, Canada

31795 Yukon Inc.