- RDT Properties
- RDT Properties Inc
- RDT Properties Inc
- Read & Stevens Inc
- Rebel Energy
- Rebel Oil Co
- Rebstock Oil Co
- REC Well Svc
- REC Well Svc
- Red Cedar Gathering Co
- Red Hawk Resources Inc
- Reddy Oil & Gas
- Redlands Supply
- Redman Oil Co Inc
- Redwolf Production Inc
- Redwood Oil Co
- Redwood Oil Inc
- Reef Development Inc
- Reef Development Inc
- Reeves Oil Paintings
- Regency Gas
- Reliable Oil & Lube Ctr
- Reliance Energy Inc
- Remington Oil Co Inc
- Remlig Oil Co
- Remora Oil Co
- Renegade Oil Co
- Renewable Oil Intl
- Republic Oil Co
- Republic Oil Co
- Republic Resources Corp
- Reserve Oil & Gas Inc
- Resource Development Tech LLC
- Resource Reserves Co
- Resource Ventures Energy Corp
- Retif Oil & Fuel
- Reuben B Knight
- Reuben B Knight
- Reuben I Wolfson Properties
- Revell Oil Field Constr Inc
- Rex Monahan Oil Prod
- Rex Oil Co
- Rex Oil Co
- Rexplore Group-KOIL Drilling
- RFG Oil
- RFH Oil LLC
- RFH Oil LLC
- RFI Oil Co LLC
- RFI Oil Co LLC
- RGH Oil Corp
- Rgl Oil Svc
- RGN Co Shop
- Rhoades Oil Co
- Rhumba Operating
- RHV Oil Co
- Riata Oil & Gas LTD
- Riata Oil & Gas LTD
- Riata Petroleum Corp
- Rice Oil Co Neighbors
- Richard B Nelson Oil Producer
- Richard Exploration Co
- Richard Partridge Oil & Gas
- Richardson Oil
- Richey Oil Field
- Richey Oil Field Constr Inc
- Richlan Drilling
- Richland Resources Corp
- Richman Petroleum Corp
- Richmond Drilling Co
- Richmond Oil Assn LLC
- Ricky's Oil Svc
- Ridge Oil Co
- Ridge Oil Co
- Ridgeway
- Rife Oil Properties Inc
- Rife Production Co
- Rigdon Marine
- Rigdon Oil Co
- Rigel Resource Co Inc
- Riggins Oil
- Riggs Oil Co
- Rim Operating Inc
- Rio Blanco Operating
- Rite Way Oil & Gas Co Inc
- Rite Way Oil & Gas Co Inc
- Rite Way Oil & Gas Co Inc
- River Country Oil
- River Rouge Minerals
- River Valley Oil Svc LLC
- Riverdale Oil
- Riverview Resources
- RJD Management Co
- Rjn Oil Svc
- RKK Production Co
- RLP Gulfstate
- RME Petroleum
- Rob's Oil Co
- Rob-Joe Oil Co
- Robert A Dean
- Robert A Dean
- Robert B Holt
- Robert B Holt
- Robert C Pettit Oil & Gas Expl
- Robert E Campbell Co
- Robert E Eubanks
- Robert E Eubanks
- Robert E Hanson
- Robert F Campbell
- Robert F Campbell
- Robert F Campbell
- Robert F Campbell
- Robert G Stewart
- Robert G Stewart
- Robert G Stewart
- Robert L Bayless Producer
- Robert L Glossop
- Robert L Glossop
- Robert O Burkett
- Robert O Burkett
- Robert S Harwell Inc
- Robertson Oil Co Inc
- Robin Hood Oil
- Robin Oil & Gas Corp
- Robiniowitz Oil Co
- Robinowitz Oil Co
- Robinowitz Oil Co
- Robinson Engineering
- Robinson Engineering Co
- Robinson Oil
- Robinson Oil Co
- Robinson Production Inc
- Robinson Production Inc
- Robison Oil Field Instr LP
- ROC Energy Inc
- Rocanville Corp
- Rock Creek Oil Co
- Rock Oil Inc
- Rocker A Operating Co
- Rockland Oil Co
- Rockpointe Resources Inc
- Rockwell Resources
- Rocky Mountain Anchor
- Rocky Mountain Anchor
- Rocky Mountain Oil & Gas
- Rocky Mountain Oil & Minerals
- Rocky Mountain Oil Field Wrhse
- Rocky Point Oil Inc
- Rocky Point Oil Inc
- Roddy Production Co
- Rodman Petroleum Corp
- Roff Operating Co
- Roger Calk
- Roger Calk
- Roger Smith Guy
- Rogers Resource Inc
- Rollert Co
- Rollins Oil Co
- Rome Oil & Gas Co
- Rome Oil & Gas Co
- Rome Oil & Gas Co
- Ron Absher Office
- Ron Menesini Petroleum Prod
- Ron's Oil Co Station No 5
- Ronnie Blubaugh
- Ronnie Blubaugh
- Roosth Productions
- Rose Run Drilling
- Roseclare Oil Co
- Roseclare Oil Co
- Rosetta Resources California
- Ross Family Trust
- Ross Oil Co
- Ross Oil Co
- Ross Oil Co
- Rosson Exploration Co
- Rougeot Oil & Gas Corp
- Roundtree & Assoc
- Rowan Inc
- Rowe Oil Properties
- Roy G Hildreth & Son Inc
- Roy J Keene
- Royale Energy Inc
- Royalty Clearinghouse
- Royce A Scott
- Royce A Scott
- Rpf Oil Co
- RPL Oil
- RRA Inc
- RTC Resources
- Rubicon Oil & Gas
- Rubicon Oil & Gas Inc
- Rubis Oil Inc
- Rudman Partnership
- Ruggiero Brothers Oil Co
- Runyan Oil Production Inc
- Rush Oil Co
- Russell Oil Co
- Russell Oil Inc
- Russell Oil Inc
- Rust Oil Corp
- Rusty Rice Oil & Gas
- Rutger Oil Co
- Ruth Eilene Butler Sullivan
- Ruth Eilene Butler Sullivan
- Rutherford Oil Corp
- Rutland Oil Co
- Rutter & Wilbanks
- Ryan Oil Co
- Rycar Oil Inc
- S & D Falco Div
- S & K Oil Co
- S & M Golden Eagle Oil Inc
- S & M Tire Fill
- S & S Energy
- S & S Oil Corp
- S & S Oil Feilds
- S & S Oil Field
- S K Oil Corp
- S Lavon Evans Jr Inc
- S M Mc Carthy Jr
- S M Mc Carthy Jr
- S S & L OIL Jv
- S W Energy
- S W Energy
- S W Operating Inc
- Saam Oil Co Inc
- Sabco Oil & Gas
- Sabco Operating
- Sacramento Energy Inc
- Saddle Creek Exploration Inc
- Saddle Creek Exploration Inc
- Safari Oil Corp
- Safeway Oil
- Safeway Oil
- Safeway Oil & Filter Recovery
- Sage Energy Co
- Sage Energy Co
- Sage Energy Co
- Sage Petroleum
- Sahara Oil Co
- Sahara Operating Co
- Salmon Oil Co
- Sam G Harrison
- Sam G Harrison
- Sam W Mays Jr
- Samedan Oil Corp
- Samedan Oil Corp
- Samedan Oil Corp
- Sampson Bladen Oil
- Sampson Bladen Oil
- Sampson Bladen Oil Co
- Samson Co
- Samson Investment Co
- Samson Lonestar
- Samson Lonestar
- Samson Resources
- Samson Resources
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- Samson Resources Co
- San Joaquin Facilities Mgmt
- San Juan Resources
- San Martin Plant
- San Martin Plant
- Sanabi Oil Co
- Sander's Oil
- Sanders Oil & Gas Co
- Sandia Oil Co
- Sandlin Oil Corp
- Sandor Petroleum Corp
- Sandri Oil
- Sandy Petroleum Inc
- Sanford Oil
- Sanguine LTD
- Santmyer Oil Co
- Santmyer Oil Co
- Sapp Dan Oil Heating
- Sapp Dan Oil Heating
- Sappington Crude Oil
- Sarah Oil & Gas
- Sarbali Oil
- Satanta Gas Plant
- Satanta Oil Co
- Sater Enterprises
