1. Aker Solutions ASA
2. Atlas Copco Ltd.
3. Bentec Gmbh Drilling & Oilfield Systems
4. China National Petroleum Corporation (CNPC)
5. Daqing Jinghong Petroleum Equipment Corporation
6. Drilling Solutions Limited
7. Foremost Industries
8. Herrenknecht Vertical Gmbh
9. Honghua Group Ltd.
10. Nabors Industries Ltd.
11. Powermaster Engineers Pvt. Ltd.
12. Premium Oilfield Technologies
13. Schlumberger Limited
14. SKF Group
15. Warrior Rig Technologies Limited