- 2 M Mineral Management Svc
- 2 M Mineral Management Svc
- Acock Engineering & Assoc
- Alpine Resources Inc
- Andrea Operating Co
- Brammer Engineering
- Cambrian Management LTD
- Cougar Oil & Gas Co Inc
- E M & We Smith
- E M & We Smith
- Epoch Wellsite Management
- Gaea Services
- Gaea Services
- Grasso Production Management
- Grasso Production Management
- Graves & Co
- Graves & Co
- Herbig Oil & Gas Co
- Iberia Management Systems Inc
- Iberia Management Systems Inc
- J-W Operating Co
- Masterson Management Corp
- Masterson Management Corp
- Oilwell Operators Inc
- Petroleum Property Management
- Production Consultants Inc
- Rawhide Complex
- Rawhide Complex
- Southwest Oil & Gas Management
- Thom D Farver
- Thom D Farver
- Topaz Oil Co
- Topaz Oil Co
- Trio Operating Co
- Trio Operating Co
- William C Eiland Oil & Gas
- William T Francis