- Anderson Seismograph Bit Svc
- Bay Shore Systems Inc
- Bear Industrial Supply & Mfg
- Bear Industrial Supply & Mfg
- Belltec Industries Inc
- Belltec Industries Inc
- Black Max
- Bob Alldredge Bit Svc
- Bob Alldredge Bit Svc
- Bort Longyear
- Bort Longyear
- Brubaker Brothers
- Central Mine Equipment Co
- Cutting Toosl Inc
- Drill-Disc Industries
- Drill-Master Intl
- Ellington Speciality Tools
- Ellington Speciality Tools
- Ellington Speciality Tools
- Ellington Speciality Tools
- Giddings Machine Co
- Gus Pech Mfg Co Inc
- Independent Well Rig Supply
- Independent Well Rig Supply
- Jevco
- Mills Machine Co
- National Jet Co
- National-Oilwell Varco
- O T Evans Enterprises
- Pengo Corp
- Sollami Co
- Two Star Development Inc
- Tycom Corp
- UPCO Inc
- Varel International