Operator List: R

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R & B Oil & Gas, Inc. R & D Oil, LLC R & E Oil Co., Inc. R & J Oil Co. R & R Partners R & W Energies LLC R & W Energies-Agency Account 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.H.S. Oil Company R.T. Enterprises of Kansas, Inc. Rader Oil Company Rains & Williamson Oil Co., Inc. Raker Resources LLC Rakestraw Bros., L.L.C Ram Petroleum Corporation Rama Operating Co., Inc. Ramshorn Resources, LLC Randi Oil Co. 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. Ratex Corporation Raven Resources LLC Raven Resources, LLC Raw Energy Corporation of Kansas Raydon Exploration, Inc. Raygary Oil Co. Raymond Oil Company, Inc. RBM Oil LLC RBOC, LLC Red Buck Oil Co Red Cedar Oil, LLC Red Cloud Exploration Operating LLC Red Hills Resources, Inc. Red Oak Energy, Inc. Red Point Oil Redboot Production, Inc Reddig Enterprises Inc. Redland Resources, LLC

Redstone Oil & Gas Company Redtail Investments LLC Reed, George A. Reef Exploration Corporation Regency Field Services LLC Regency Midcon Gas LLC REH Oil and Gas LLC Reichlinger Business Services Reilly Oil Company, Inc. Relative Energy, Inc. Reliance Oil, LLC Remco Energy Corporation Renegade Oil Co., a General Partnership Renegade Resources Corp. Renick Energy, L.C. Resource Operations, Inc. Resources & Investment Co. Resources Investment Corporation Ressler Well Service, Inc. Reusch Well Service, Inc. RF Hembree Oil, LLC RGN Company, Inc. Rhodes Well Service Rice Engineering Corporation Rice Production Company Richardson and Son , Inc. Richardson Developments Richardson Oil Richardson Oil Operating Richlan Drilling, a General Partnership Richland Oil Investments, LLC Rick's Well Service Rick's Well Service Rickerson, Russell Rierson Energy, LLC Rierson, Joe Rig 6 Drilling Co., Inc. Riley Resources, Inc . Rincon Oil & Gas LLC Rine Drillingand Exploration, Inc. Ring Energy, Inc. Ringneck Resources, LLC Ritchie Exploration, Inc. Rivendell Farms, Inc. River Rock Operating, LLC Riviera Operating, LLC RJ Energy, LLC RJM Company RL Investment, LLC

RL Oil & Gas, LLC RME Petroleum Company RMR Operating, LLC Roadrunner Energy, Inc. Robert Hopkins Operations, LLC Robert P. Wilson, Inc. Robert S. Harwell, Inc. Roberts and Murphy, Inc. Roberts Resources, Inc. Roberts, Lelia M (deceased) Roberts, Randy Robertson, Richard Robinette Oil Company LLC Robinowitz Oil Company, a General Partnership Robl-Six, Inc. Robuck Petroleum., LLC Rock Creek Crude, LLC Rock Creek Oil, LLC Rock Creek Resources, a General Partnership Rock Creek Resources, LLC Rock Petroleum LLC Rockin "A" Oil Rockin Bar Nothin Ranch, Inc. Rockin G. Energy, LLC Rocky Road Oil Company Rodriguez, Everado Roger Jost Revocable Trust Rolling Meadows Oil & Gas Development, LLC Rome Oil, LLC Ron's Oil Operations Inc Ron-Bob Oil LLC Ronald Russ Prater, Inc. Rosewood Resources, Inc. Ross Operating Rourk, Delma M.(deceased) Roxanna Pipeline, Inc. Royal Drilling Inc RSD Minerals LLC Ruda Exploration Inc Rude Crude Running Foxes Petroleum Inc. Rupe Oil Company, Inc. Rupp, C. F. - Disposal Rush, Terry L. Russell Gas Co., LLC Russell Oil, Inc.