1. Archer
2. Canadian Energy Equipment Manufacturing FZE
3. Cased Hole Well Services LLC
4. Cudd Pressure Control Inc.
5. Halliburton Energy Services Inc.
6. High Arctic Energy Services Inc.
7. Key Energy Services
LLC
8. Nabors Industries Ltd.
9. NOV Inc.
10. Precision Drilling Corporation
11. PT Elnusa Tbk.
12. Superior Energy Services
13. Tecon Oil Services Ltd.
14. Velesto Energy Berhad
15. WellGear Group B.V.