PIONEER ENERGY SERVICES CORP - FORM 10-K - EX-21.1 - SUBSIDIARIES OF PIONEER DRILLING COMPANY - February 17, 2011

Attached files

file	filename
EX-31.1 - SECTION 302 CEO CERTIFICATION - PIONEER ENERGY SERVICES CORP	dex311.htm
EX-32.1 - SECTION 906 CEO CERTIFICATION - PIONEER ENERGY SERVICES CORP	dex321.htm
EX-31.2 - SECTION 302 CFO CERTIFICATION - PIONEER ENERGY SERVICES CORP	dex312.htm
EX-23.1 - CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM - PIONEER ENERGY SERVICES CORP	dex231.htm
10-K - FORM 10-K - PIONEER ENERGY SERVICES CORP	d10k.htm
EX-32.2 - SECTION 906 CFO CERTIFICATION - PIONEER ENERGY SERVICES CORP	dex322.htm

EXHIBIT 21.1

The following is a list of all of Pioneer Drilling Company’s direct and indirect subsidiaries:

1.	Pioneer Drilling Services, Ltd., a Texas corporation — 100% direct subsidiary.

2.	Pioneer Global Holdings, Inc., a Delaware corporation — 100% indirect subsidiary—100% owned by Pioneer Drilling Services, Ltd.

3.	Pioneer Services Holdings, L.L.C., a Delaware limited liability company — 100% indirect subsidiary—100% owned by Pioneer Global Holdings, Inc.

4.	Pioneer Latina Group SDAD, Ltda., a Panama corporation — 100% indirect subsidiary—owned by Pioneer Global Holdings, Inc. (99%) and Pioneer Services Holdings, L.L.C. (1%).

5.	PDC Holdings de Mexico, S. de R.L. de C.V. — 100% indirect subsidiary—owned by Pioneer Global Holdings, Inc. (99%) and Pioneer Services Holdings, L.L.C. (1%).

6.	PDC Logistics de Mexico, S. de R.L. de C.V. — 100% indirect subsidiary—owned by PDC Holdings de Mexico, S. de R.L. de C.V. (99.9%) and Pioneer Services Holdings, L.L.C. (0.1%).

7.	PDC Drilling Mexicana, S. de R.L. de C.V. — 100% indirect subsidiary—owned by PDC Holdings de Mexico, S. de R.L. de C.V. (99.9%) and Pioneer Services Holdings, L.L.C. (0.1%).

8.	Pioneer de Colombia SDAD, Ltda., a Panama corporation — 100% indirect subsidiary—owned by Pioneer Latina Group SDAD, Ltda. (99%) and Pioneer Services Holdings, L.L.C. (1%).

9.	Pioneer de Colombia SDAD, Ltda., Surcusal Colombia, a Colombian branch — 100% indirect subsidiary—100% owned by Pioneer de Colombia SDAD, Ltda.

10.	Proveedora Internacional de Taladros S.A.S — 100% indirect subsidiary—100% owned by Pioneer Global Holdings, Inc.

11.	Pioneer Production Services, Inc., a Delaware corporation — 100% direct subsidiary.

12.	Pioneer Wireline Services Holdings, Inc., a Delaware corporation — 100% indirect subsidiary—100% owned by Pioneer Production Services, Inc.

13.	Pioneer Wireline Services, L.L.C., a Delaware limited liability company — 100% indirect subsidiary—100% owned by Pioneer Wireline Services Holdings, Inc.

14.	Pioneer Well Services, L.L.C., a Delaware limited liability company — 100% indirect subsidiary—100% owned by Pioneer Production Services, Inc.

15.	Pioneer Fishing & Rental Services, L.L.C., a Delaware limited liability company — 100% indirect subsidiary—100% owned by Pioneer Production Services, Inc.