Operator List: R

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R & B Oil & Gas, Inc. R & W Energies LLC R J Operating Co. R. & J. Oil Co. R. C. Taylor Operating Company LLC R. D. Energy, Inc. R. D. Finnesy Oil R. P. Nixon Operations, Inc R.C.Taylor Companies, Inc. R.T. Enterprises of Kansas, Inc. Rader Oil Company RaeLee Oil LLC Rains & Williamson Oil Co., Inc. Raker Resources LLC Rakestraw Bros., L.L.C Ram Petroleum Corporation Rama Operating Co., Inc. Rampike Resources, Ltd Ramshorn Resources, LLC Randon Production Company Inc. Randy J Walker Oil Company Ranes, Jerry J., a General Partnership Raney Oil Company, LLC Range Oil Company, Inc. Rankin, Lennes Rapid Well Service, Inc. Raydon Exploration, Inc. Raymond Oil Company, Inc. RBM Oil LLC RCS Oil Reata Petroleum LLC Rebel Oil LLC Red Cedar Oil, LLC Red Cloud Exploration Operating LLC Red Hills Energy, LLC Red Hills Resources, Inc. Red Oak Energy, Inc. RedBud Oil & Gas Operating, LLC Reddig Enterprises Inc. Redland Resources, LLC

Redstone Oil & Gas Company Redtail Investments LLC Redtail Resources, LLC Reed Oil, LLC Reef Operating, Inc. Reilly Oil Company, Inc. Relative Energy, Inc. Reliance Oil, LLC Renegade Resources Corp. Resource Oil and Gas, LLC Resources & Investment Co. Resources Investment Corporation Ressler Well Service, Inc. Reusch Well Service, Inc. RGN Company, Inc. RH Capital-Beets, LLC Rhea, Andrew Rhodes Well Service Rice Engineering Corporation Rice Production Company Richardson and Son , Inc. Richardson Developments Richardson Oil Richlan Drilling, a General Partnership Richland Oil Investments, LLC Rick's Well Service Rickerson, Russell Rierson Energy, LLC Rierson, Joe Riley Resources, Inc . Ringneck Resources, LLC Ritchie Exploration, Inc. Rivendell Farms, Inc. River Oil LLC River Rock Operating, LLC Riviera Operating, LLC RJ Energy, LLC RJM Company RKT, Inc. RL Investment, LLC

Robert Hopkins Operations, LLC Robert P. Wilson, Inc. Robert S. Harwell, Inc. Roberts Resources, Inc. Roberts, Randy Robertson, Richard Robinette Oil Company LLC Robinowitz Oil Company, a General Partnership Robl-Six, Inc. Rock Bottom Oil Rock Creek Crude, LLC Rock Petroleum LLC Rockhound Petroleum, LLC Rockin "A" Oil Rockin Bar Nothin Ranch, Inc. Rockin G. Energy, LLC Rockin K Enterprises LLC Rockwall Energy LLC Rocky Road Oil Company Rodriguez, Everado Rogers Oil, LLC Rolling Meadows Oil & Gas Development, LLC Rome Oil, LLC Ron's Oil Operations Inc Ron-Bob Oil LLC Ronald Russ Prater, Inc. Royal Drilling Inc Royal Energy, Inc. RSD Minerals LLC Ruda Exploration Inc Rude Crude Running Foxes Petroleum Inc. Rupe Oil Company, Inc. Rush, Terry L. Russell Gas Co., LLC Russell Oil, Inc.