1. Baker Hughes Company
2. BASF SE
3. Canadian Natural Resources Limited
4. Cenovus Inc.
5. ChampionX Corporation
6. Chevron Corporation.
7. Clariant AG
8. Croda International PLC
9. Dow Inc.
10. DuPont de Nemours Inc.
11. Exterran Corporation by Enerflex Ltd.
12. Halliburton Company
13. Hemisphere Energy Corporation
14. Lukoil Oil Company
15. Oil Chem Technologies
16. Oil Plus Ltd
17. Premier Oilfield Group LLC
18. RCS Group of Companies
19. Royal Dutch Shell PLC
20. Schlumberger Limited
21. Secure Energy Services Inc.
22. SGS Soci?t? G?n?rale de Surveillance SA
23. SNF Group
24. Stepan Company
25. Sulzer
26. TechnipFMC PLC
27. Titan Oil Recovery Inc.
28. Ultimate EOR Services LLC
29. Vizag Chemical International