| POOL CO | |
| POOL CO TEXAS LTD | Dec 31 |
| PRODUCTION OPERATORS CORP | Sep 30 |
| QUALITY TUBING INC | Dec 31 |
| QUASAR TECH INC/UT | Dec 31 |
| Quintana Energy Services Inc. | Dec 31 |
| Quintana Energy Services LP | Dec 31 |
| Saga Energy, Inc. | Dec 31 |
| Schlumberger Investment SA | Dec 31 |
| SemGroup Corp | Dec 31 |
| SERVICE FRACTURING CO | Mar 31 |
| SESI LLC | |
| Seventy Seven Energy Inc. | Dec 31 |
| SHARP DAVID W | Dec 31 |
| SPORTSEND INC | Jan 31 |
| Stallion Oilfield Services, Inc. | Dec 31 |
| Steel Excel Inc. | Dec 31 |
| STOLT NIELSEN SEAWAY AS | |
| STW RESOURCES HOLDING CORP. | Dec 31 |
| SUBSEA 7 S.A. | Dec 31 |
| SULLIVAN JUSTIN | Dec 31 |
| SULPHCO INC | Dec 31 |
| SUNDOWNER OFFSHORE SERVICES INC | Dec 31 |
| SUPERIOR ENERGY SERVICES INC | Dec 31 |
| Superior Energy Services-North America Services, Inc | Dec 31 |
| Superior Offshore International Inc. | Dec 31 |
| Superior Well Services, INC | Dec 31 |
| Sustainable Environmental Technologies Corp | Mar 31 |
| TAYLOR ROBERT S | Dec 31 |
| TEKOIL & GAS CORP | Dec 31 |
| TORCH OFFSHORE INC | Dec 31 |
| TRANSACT ENERGY CORP | Dec 31 |
| TRANSCOASTAL MARINE SERVICES INC | Dec 31 |
| Trans-Orient Petroleum Ltd. | Jul 31 |
| TUBO FGS LLC | Dec 31 |
| TUBOSCOPE HOLDING US INC | Dec 31 |
| TUBOSCOPE INC | Dec 31 |
| TUBOSCOPE PIPELINE SERVICES INC | Dec 31 |
| UNITED ENERGY CORP /NV/ | Mar 31 |
| U.S. WELL SERVICES HOLDINGS, LLC | Dec 31 |
| U.S. Well Services, LLC | Dec 31 |
| UTI ENERGY CORP | Dec 31 |
| Vantage Energy Services, Inc. | Dec 31 |
| VARCO INTERNATIONAL INC /DE/ | Dec 31 |
| VARCO IP INC | Dec 31 |
| VARCO LP | Dec 31 |
| Verdant Technology CORP | Dec 31 |
| Warrior Energy Services CORP | Dec 31 |
| WEDEMEYER PHIL D | Dec 31 |
| WESCORP ENERGY INC | Dec 31 |
| WESTERN COMPANY OF NORTH AMERICA | Dec 31 |
| WESTRANGE CORP | Dec 31 |
| WILLBROS GROUP INC | Dec 31 |
| Willbros Group, Inc.\NEW\ | Dec 31 |