Packers Plus Energy Services, Inc.Alberta, Canada
Clayton IndustriesCalifornia, United States
Centek Ltd.Devon, United Kingdom
Diamond Offshore Drilling, Inc.Texas, United States
Nexen Corp.Gyeonggi-do, South Korea
Ensign Drilling, Inc.
Schoeller-Bleckmann Oilfield Equipment AGAustria
Halliburton Energy Services, Inc.Texas, United States
Haimo Technologies Group Corp.Gansu Sheng, China
Coastal Chemical Co. LLC
Sourcewater, Inc.Texas, United States
RPC, Inc.Georgia, United States