| company_name | company_city | company_state |
|---|---|---|
| Citation Oil & Gas Corporation | Houston | TX |
| Nadel & Gussman | Tulsa | OK |
| Cheyenne Petroleum | Oklahoma City | OK |
| Panther Energy Company | Tulsa | OK |
| Range Resources | Oklahoma City | OK |
| Sandridge Energy | Oklahoma City | OK |
| Texas American Resources Company | Austin | TX |
| Mustang Fuel Corporation | Oklahoma City | OK |
| Laredo Petroleum | Midland | TX |
| Kirkpatrick Oil Company | Oklahoma City | OK |
| Kaiser-Francis Oil Company | Tulsa | OK |
| Jones Energy | Austin | TX |
| Hunt-Comstock | Dallas | TX |
| Cisco Energy | Dallas | TX |
| Reef Energy | Dallas | TX |
| Chesapeake Energy Corporation | Oklahoma City | OK |
| Ventura Refining & Transmission, LLC | Oklahoma City | OK |
| Linn Energy, LLC | Oklahoma City | OK |
| Primary Natural Resources III, LLC | Tulsa | OK |
| Gulfport Energy | Oklahoma City | OK |
| Primary Natural Resources | Tulsa | OK |
| The Oil & Gas Clearing House | Houston | TX |
| The Chalkley Companies | Lake Charles | LA |
| EnerQuest Oil & Gas | Oklahoma City | OK |
| Penneco | Delmont | PA |
| Universal Well Services | Meadville | PA |
| Highmount Exploration & Production | Oklahoma City | OK |
| Riata Management, LLC | Edmond | OK |
| J Cleo Thompson | Dallas | TX |
| New Prospect Company | Fort Smith | AR |
| GMX Resources | Oklahoma City | OK |
| Swift Energy | Houston | TX |
| Yates Petroleum Corporation | Artesia | NM |
| EnerVest, Ltd. | Houston | TX |
| Crown Energy Company | Oklahoma City | OK |
| Panhandle Oil & Gas, Inc. | Oklahoma City | OK |
| Epsilon Energy, Ltd. | Houston | TX |
| Koch Industries | Denver | CO |
| Activa Resources | San Antonio | TX |
| Heyco | Roswell | NM |
| Dugaan Production | Farmington | NM |
| Ward Petroleum | Oklahoma City | OK |
| Continental Resources | Oklahoma City | OK |
| Ward Petroleum Ft. Collins | Ft. Collins | CO |
| Citation Oil & Gas OKC | Oklahoma City | OK |
| Peak Energy | Durango | CO |
| Flogistix | Oklahoma City | OK |
| Legion Energy Services | Tulsa | OK |
| ARAMCO | Saudi Arabia | . |
| Mack Energy | Duncan | OK |
| Primexx Energy Partners | Dallas | TX |
| Breitburn Energy | Houston | TX |
| Meade Energy | Oklahoma City | OK |
| Mid-Con Energy Partners | Tulsa | OK |
| Range Resources - Fort Worth | Fort Worth | TX |
| RKI | Oklahoma City | OK |
| Yates Petroleum | Southeast | NM |
| American Energy Partners | Oklahoma City | OK |
| McElvain Energy | Denver | CO |
| Palo Petroleum | Dallas | TX |
| Signal Hill | Los Angeles | CA |
| Whiting Petroleum | Dickinson | ND |
| Jetta Operating Company | F.t Worth | TX |
| Penn General | Warren | PA |
| Approach Resources | Ft. Worth | TX |
| Willow Bend Oil | Plano | TX |
| Crescent Point Energy | Denver | CO |
| Endeavor Energy Resources | Midland | TX |
| Gastar | Oklahoma City | OK |
| Tema Oil and Gas | Houston | TX |
| International Energy | Tulsa | OK |
| JMA Energy Company | Oklahoma City | OK |
| Memorial Resource Development | Houston | TX |
| Cinco Pipe & Supply | Dallas | TX |
| Vess Oil | Dallas | TX |
| Dome Energy | Houston | TX |
| Generic | Midland | TX |
| Pablo Energy | Edmond | OK |
| Abraxas Petroleum | San Antonio | TX |
| New Prospect | Denver | CO |
| Dorado Exploration & Production | Denver | CO |
| Dorchester Capital | Oklahoma City | OK |
| Energen | Birmingham | AL |
| Energen Midland | Midland | TX |
| The Cavins Corporation | Houston | TX |
| Catoosa Test Facility | Tulsa | OK |
| Stream Flo | Oklahoma City | OK |
| FourPoint Energy | Denver | CO |
| Tanos Energy | East Texas | TX |
| SK Plymouth | Tulsa | OK |
| Diamondback Energy | Oklahoma City | OK |
| Legacy Reserves | Midland | TX |
| IOG Capital | Dallas | TX |
| Getzler Henrich | Houston | TX |
| Covey Park | Dallas | TX |
| Latshaw | Tulsa | OK |
| Geo Fossil Fuels | New York | NY |
| Big Star | Oklahoma City | OK |
| Chaparral | Oklahoma City | OK |
| Warwick Energy | Oklahoma City | OK |
| Stone Creek Energy | Oklahoma City | OK |
| Panther 3 | Tulsa | OK |
| Energynet | Houston | TX |
| Oakspring Energy | Oklahoma City | OK |
| Black Mountain Sand | Fort Worth | TX |
| Circle 9 | Oklahoma City | OK |
| Horizontal Well Drillers | Oklahoma City | OK |
| Land Information Services | Oklahoma City | OK |
| Bison Energy Services | Oklahoma City | OK |
| Albaron Partners | Oklahoma City | OK |
| Reliance | Tulsa | OK |
| AID | Oklahoma City | OK |
| Meagher Energy | Tulsa | OK |
| Oseberg | Oklahoma City | OK |
| Petco | Mt. Vernon | IL |
| Blake Production | Oklahoma City | OK |