1. Baker Hughes Company
2. Core Laboratories N.V.
3. Dynaenergetics GmbH & Co KG
4. FHE USA LLC
5. Halliburton Company
6. Hunting PLC
7. NOV Inc.
8. Oso Perforating
9. PacSci EMC
10. Promperforator LLC
11. Schlumberger Limited
12. Shaanxi FYPE Rigid Machinery Co. Ltd.
13. Tassaroli S.A.
14. Vigor USA LLC
15. Weatherford International PLC
16. Yellow Jacket Oil Tools