| Anderson Oil & Gas, Inc. |
O'Brien Energy Company |
| Baker- Atlas |
Oden & Associates, LLC |
| David L. Billinglsey, Jr. |
Palmer Petroleum, Inc. |
| Cowgill & Associates, LLC |
Par Minerals Corporation |
| Delta-T Geophysical Consulting, Inc. |
Precision Wireline Services |
| Geomap Company |
Reeves Wireline Services, Inc. |
| C.H.C. Gerard and Associates |
Gene Robinson |
| John C. Grunau |
Mike Rogers Drilling Company |
| Geological Consulting Services |
Rosbottom Production Corp. |
| Geological Drafting Consultants |
Sandstone Exploration, LLC |
| Grigsby Petroleum, Inc. |
Erwin W. Saye |
| Hardin International Processing |
Schlumberger Well Service |
| J-W Operating Company |
Sklar Exploration Co. LLC |
| Nelson Energy |
Skrivanos Engineering, Inc. |
| Norman Corp. of Caddo, Inc. |
Spanoil Exploration |
| |
Spanoil Exploration |
| |
Stroud Production, LLC |
| |
Williamson Oil and Gas, Inc. |
