1. Allspeeds Ltd.
2. Canadian Advanced ESP
3. Cook Pump Company
4. Dansco Manufacturing
5. E & H Manufacturing Inc.
6. Halliburton Energy Services Inc.
7. Hess Corporation
8. Jindal Hydro Projects Inc.
9. Levare International
10. LUFKIN Industries Inc.
11. NOV Inc.
12. Redhead Artificial Lift Ltd.
13. Schlumberger Limited
14. Star Hydraulics & Pneumatics
LLC.
15. Tenaris
16. Weatherford International PLC
17. Yantai Jereh Petroleum Equipment & Technologies Co. Ltd.