1. Abraj Energy Services SAOC
2. Automated Rig Technologies Ltd
3. BP PLC
4. Chevron Corporation
5. Drillform Technical Services Ltd
6. Drillmec Inc. by Drillmec S.P.A.
7. Ensign Energy Services Inc.
8. Epiroc Finland Oy Ab
9. Exxon Mobil Corporation
10. Hilti Corporation
11. Huisman Equipment BV
12. Nabors Industries Limited
13. National-Oilwell Varco Inc.
14. Petroliam Nasional Berhad (PETRONAS)
15. Petr?leo Brasileiro S.A.
16. Phillips 66 Company
17. Precision Drilling Corporation
18. Rigarm Inc.
19. Saudi Arabian Oil Company
20. Sekal AS
21. Shell group of companies
22. Siemens AG
23. SKF Group
24. Valero Energy Corporation
25. Weatherford International plc