- Travelers Oil Co
- TRC Operating Co Inc
- Trees Oil Co
- Trejo Oil Co
- Trevino's Black Gold Prod Gag
- Tri County Oil & Gas
- Tri County Oil & Gas Inc
- Tri PAR Oil Co
- Tri State Oil Reclaimers
- Tri State Oil Tool Industries
- Tri Union
- Tri-State Oil
- Tri-State Producing & Dev Inc
- Tri-Tex Exploration LTD
- Tri-Tex Exploration LTD
- Tri-Union Development Corp
- Tri-Union Development Corp
- Triad Energy
- Triad Energy Co
- Triad Resources Inc
- Triangle Oil & Gas
- Triangle Production
- Triangle Production
- Triangle Productions
- Trich Wenert
- Trico Oil Co
- Trident Oil Corp
- Trimble & Maclaskey Oil Ofc
- Trinity Oil & Gas Corp
- Trio Petroleum Inc
- Triple W Oil
- Tripower Resources Inc
- Tritex Petroleum Co
- Trius Oil
- Tropic Oil Co
- Tropic Oil Co
- Trout Oil Co
- Troy Duncan Oil Co
- True Companies
- True Oil Co
- Trueblood Resources
- TRYMA Operating
- Trzebiatowski Oil Co
- Trzebiatowski Oil Co Ronald
- TST Oil Gas
- Tugwell Oil Co Inc-Exxon Prods
- Tullo Oil Inc
- Turnco Inc
- Turnco Inc
- Turner Burnette
- Turner Burnette
- Turner Oil & Gas
- Turner Resources Inc
- Turrentine Oil & Gas
- Twin Butte Station
- Twin Oil Co
- Two States Oil Co
- Tyler Oil Co
- Tyler Oil Co
- Tyro Oil Corp
- Tyro Oil Corp
- Tyson Oil Co
- U S Drilling Co
- U S Oil
- U S Oil & Gas Inc
- U S Oil Corp
- U S Oil Corp
- U S Oil Corp
- U S Oil Corp
- U S Petroleum
- U S Petroleum
- Ubrieta Oil
- Ubrieta Oil
- Ullman Oil Inc
- Ullum Oil & Gas
- Union Jobber Ron Lee Oil Sales
- Union Oil
- Union Oil Co
- Union Oil Co
- Union Oil Co
- Union Oil Co Of California
- Union Oil Of California
- Union Oil Pipe Line Station
- Union Royalty Inc
- Unit Corp
- Unit Petroleum Co
- United Crude Oil
- United Heritage Corp
- United Oil
- United Oil
- United Oil
- United Oil
- United Oil & Mineral
- United Oil Co LLC
- United Oil No 2065
- United Oil Paintings
- United Oil Products Terminal
- United Oil Recovery
- United Oil Recovery Inc
- United Oil Svc
- United Petro LTD
- United Resources Corp
- United States Exploration Inc
- United States Government
- United States Oil
- United States Oil
- United States Oil
- United States Oil Corp
- United World Energy Corp
- Universal Operating Inc
- Uno Mas Oil LTD
- Unocal Corp
- Unocal Corp
- Unocal Corp
- Unocal Corp
- Unocal North Cowden Field
- Unocal Oil & Gas Operations
- Unocal Pipeline Co
- Uplands Resources Inc
- Us Oil
- Us Oil Corp
- Us Oil Group
- V 1 Oil Co
- V 1 Oil Co Inc
- V F Neuhaus Properties Inc
- V L Tammaro Oil Co
- V-F Petroleum Inc
- Valance Operating Co
- Valbel West Corp
- Valence Operating Co
- Valera Oil Co
- Valera Oil Co
- Valerio Oil
- Valero LP Pipeline
- Valley Oil Co
- Valvoline Express Care
- Valvoline Express Care
- Valvoline Instant Oil Change
- Valvoline Instant Oil Change
- Valvoline Instant Oil Change
- Valvoline Instant Oil Change
- Valvoline Instant Oil Change
- Van Fossan Oil Corp
- Van Fossan Oil Corp
- Van Fossan Oil Corp
- Van Fossan Oil Corp
- Vanderman Oil
- Vantex Gas Pipeline Co
- Vaquero Energy Inc
- Vaquero Energy Inc
- Vaquero Oil & Gas Inc
- Vastar Resources Inc
- Vastar Resources Inc
- Vaughan Oil Co
- Vaughey & Vaughey
- Vaughn Petroleum Inc
- Vecta Exploration
- Veenker Resources Inc
- Venada Inc
- Venoco Inc
- Venoco Inc
- Venture Oil Co Of Texas
- Venturelli-Denk
- Verado Energy Inc
- Verado Energy Inc
- Verdad Oil & Gas Corp
- Verde Oil Co
- Verde Oil Co
- Verde Oil Co
- Verde Oil Co
- Verde Vista Energy Co
- Verizion
- Vernon E Faulconer Inc
- Vernon E Faulconer Inc
- Vernon E Faulconer Inc
- Vernon Faulconer Inc
- Verona Energy
- Verona Oil
- Verona Oil Co
- Verona Oil Co Inc
- Verona Oil Co Inc
- Verona Oil Co Inc
- Verona Oil PAQS Country
- Verrexco
- Vescal Corp
- Vesco Oil Corp
- Vess Oil Corp
- Vess Oil Corp
- Vess Oil Corp
- Vess Oil Corp
- Victory Lane Quick Oil Change
- Victory Lap Oil Change
- Victory Oil Co
- Viking International Resources
- Viking Resources Corp
- Viking Resources Corp
- Village Oil Inc
- Village Oil Inc
- Vin Fisher Oil Co
- Vintage Drilling
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Vintage Petroleum Inc
- Virgil Taylor Drilling Co
- Virgin Oil
- Virgin Oil
- Virginia Natural Gas
- Virginia Oil Co
- Virginia Oil Co
- Virginia Oil Co
- Virginia Oil Co
- Vis-Op Oil
- Vista Oil & Gas Corp
- Viva Oil Co
- Vivace Valve Oil
- Vogt Oil Co
- Vonco Of Mississippi Inc
- Vonfeldt Oil Operations Inc
- Voss Oil Inc
- Vtex Energy Inc
- Vulpolene Oil Co
- W & T Offshore Inc
- W B Hamilton Estate Operating
- W B Hamilton Estate Operating
- W B Osborn Oil & Gas
- W B Osborn Oil & Gas Operation
- W B Osborn Oil & Gas Operation
- W B Osborn Oil & Gas Oprtns
- W B Osborn Oil & Gas Oprtns
- W C Allen & Sons
- W Carl Proctor
- W D Kennedy Co
- W Douglas Ankenman Jr
- W Douglas Ankenman Jr
- W E Shrider Co
- W G Operating
- W G Operating
- W G Operating Inc
- W G Operating Inc
- W K Gordon
- W K Gordon
- W L Lindemann Drilling Co
- W L Lindemann Drilling Co
- W L Toney
- W M Averill Inc
- W O Operating Co
- W P Carr
- W P Natural Gas
- W R Crawford Inc
- W R Williams Inc
- W R Williams Inc
- W R Williams Inc
- W T Waggoner Estate
- W W Harvey
- W W Mc Clure Jr
- Wabash Production
- Wabash Production
- Wadeco Specialties
- Wagner & Brown
- Wagner III Inc Duer
- Wagner Oil
- Wagner Oil Co
- Wagner Oil Co
- Wagner Oil Co
- Wagner Oil Co
- Wagner Oil Co
- Wagner Oil Co
- Wagner Oil Co
- Wagner Oil Co
- Wahl Oil Co
- Wakefield Oil
- Walbert Co
- Walker Resources Co
- Walker Resources Inc
- Wall Oil Co
- Wallace Oil
- Wallace Petroleum Investments
- Walsh & Watts Inc
- Walsh & Watts Inc
- Walsh & Watts Inc
- Walsh & Watts Inc
- Walsh & Watts Inc
- Walsh & Watts Inc
- Walsh & Watts Inc Production
- Walsh Petroleum
- Walsh Resources Inc
