| R & B Falcon Drilling International Deepwater, Inc | United States |
Private
|
| Raam Global Energy Co | United States |
Private
|
| Radius Resources Corp | Canada |
Private
|
| Rain CII Carbon LLC | United States |
Private
|
| Raizen Fuels Finance S.A. | Cayman Islands |
Private
|
| RAM Energy, Inc. | United States |
Private
|
| Rangeford Resources, Inc. | United States |
Private
|
| Ras Laffan Liquefied Natural Gas Company Limited | Qatar |
Private
|
| Ras Laffan Liquefied Natural Gas Company Limited (3) | Qatar |
Private
|
| Ras Laffan Liquefied Natural Gas Company Limited (II) | Qatar |
Private
|
| Ratio Oil Exploration 1992 Limited Partnership | Israel |
Private
|
| Rattler Midstream LP | United States |
Private
|
| Raven Energy Ltd. | Canada |
Private
|
| Redcliffe Exploration Inc | Canada |
Private
|
| REDEXIS, S.A. | Spain |
Private
|
| RedHawk Holdings Corp. | United States |
Private
|
| Reece Energy Exploration Corp. | Canada |
Private
|
| Reef Resources Ltd. | Canada |
Private
|
| Refinadora Costarricense de Petroleo, S.A. | Costa Rica |
Private
|
| Refinaria de Petroleo Riograndense S.A. | Brazil |
Private
|
| Refineria Dominicana De Petroleo S.A. | Dominican Republic |
Private
|
| Regency Energy Finance Corp | United States |
Private
|
| Regency Gas Services LP | United States |
Private
|
| Reliance Holding USA Inc | United States |
Private
|
| Reliance Petroleum Ltd | India |
Private
|
| Remington Oil & Gas Corporation | United States |
Private
|
| Remora AS | Norway |
Private
|
| Remote Services Inc. | United States |
Private
|
| Renegade Petroleum Ltd | Canada |
Private
|
| Renova Energy PLC | United Kingdom |
Private
|
| Reorganized TXCO, Inc. | United States |
Private
|
| Republic of Mozambique Pipeline Investments Co (Pty) Ltd | South Africa |
Private
|
| Resaca Exploitation, Inc. | United States |
Private
|
| Result Energy Inc. | Canada |
Private
|
| Rex Bionics PLC | United Kingdom |
Private
|
| Ria Resources Corp | Canada |
Private
|
| Richards Oil & Gas Limited | Canada |
Private
|
| Rift Oil Limited | United Kingdom |
Private
|
| RM Partners LP | United States |
Private
|
| RMS Systems Inc | Canada |
Private
|
| ROC Oil (Vic) Pty Limited | Australia |
Private
|
| ROC Oil Co Pty Ltd | Australia |
Private
|
| Rock Energy Inc. | Canada |
Private
|
| Rock Energy Resources, Inc. | United States |
Private
|
| Rockhopper Mediterranean Limited | United Kingdom |
Private
|
| ROCKPOINT GAS STORAGE CANADA LTD. | Canada |
Private
|
| ROCKROSE ENERGY LIMITED | United Kingdom |
Private
|
| Roma Petroleum Nl | Australia |
Private
|
| Rose Rock Midstream Crude LP | United States |
Private
|
| Rosetta Resources Inc. | United States |
Private
|
| Rosneft International Holdings Limited | British Virgin Islands |
Private
|
| ROWAN COMPANIES LIMITED | United States |
Private
|
| Rowan Cos Inc | United States |
Private
|
| RPC, Inc. | United States |
Private
|
| RRI Energy Services, LLC | United States |
Private
|
| Rrpf Engine Leasing Ltd | United Kingdom |
Private
|
| RSX Energy Inc. | Canada |
Private
|
| RUSIA Petroleum | Russia |
Private
|
| Ruspetro Limited | United Kingdom |
Private
|
| RussOil Corporation | United States |
Private
|
| Rutherford-Moran Oil Corporation | United States |
Private
|
| Ryland Oil Corp. | Canada |
Private
|
| Sabine Oil & Gas Corporation | United States |
Private
|
| Sabine Oil & Gas LLC | United States |
Private
|
| Sabine Pass LNG LP | United States |
Private
|
| Sahaneftegas | Russia |
Private
|
| Saipem America, Inc | United States |
Private
|
| SALAMANDER ENERGY LIMITED | United Kingdom |
Private
|
| Samson Investment Company | United States |
Private
|
| Santonia Energy Inc | Canada |
Private
|
| Sapex Ltd | Australia |
Private
|
| Saratoga Resources, Inc. | United States |
Private
|
| Saxon Energy Services Inc. | Canada |
Private
|
| Schahin Oil & Gas Ltd | Brazil |
Private
|
| Schlumberger PLC | United Kingdom |
Private
|
| Schlumberger Technology Corporation | United States |
Private
|
| Scorpion Offshore Limited | Bermuda |
Private
|
| Scotsman Group Inc. | United States |
Private
|
| SDX Energy Inc | United Kingdom |
Private
|
| Seaenergy PLC | United Kingdom |
Private
|
| Seagull Energy Canada Limited | Canada |
Private
|
| Seair Inc. | Canada |
Private
|
| Seajacks International Ltd. | United Kingdom |
Private
|
| Seapeak Meridian ApS | Denmark |
Private
|
| Sefton Resources Inc | United States |
Private
|
| Seitel, Inc. | United States |
Private
|
| Select Water Solutions, Inc. | United States |
Private
|
| Sembmarine SSP Inc | United States |
Private
|
| SEMPRA INFRASTRUCTURE PARTNERS, LP | United States |
Private
|
| SENEX ENERGY PTY LTD. | Australia |
Private
|
| Seokwang Construction Co. Ltd. | South Korea |
Private
|
| Seplat Energy Plc | United Kingdom |
Private
|
| Sequoia Oil & Gas Trust | Canada |
Private
|
| Sete Brasil Participacoes S.A | Brazil |
Private
|
| Sevan Drilling ASA | Norway |
Private
|
| Seven Energy International Limited | Nigeria |
Private
|
| Seven Seas Petroleum Inc | United States |
Private
|
| Sfp Pipeline Holdings Inc | United States |
Private
|
| SG Resources Mississippi LLC | United States |
Private
|
| Sharon Energy Ltd. | Canada |
Private
|
|
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