- Baker Huges
- Baker Hughes Inteq
- BJ Services Co
- CETCO Offshore
- Environmental Treatment Team
- Gemoco
- Newpark Drilling Fluids
- Newpark Drilling Fluids
- Nova Technology Corp
- Path Finder Energy Svc Inc
- Reedhycalog
- Scientific Drilling Intl
- Smith Bits
- Stolt Offshore Inc
- Techniques International Corp
- TIW Corp
- Tuboscope
