| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Paul Graham Drilling & Service Co. | Oil & Gas Operator | Dec 2011 | |
| 2 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 3 | Production Specialties Company | Oil & Gas Operator | Dec 2003 |