W & W Production Company, General Partnership
W M Petroleum LLC
W. R. Williams, Inc.
W.D. Short Oil Co., LLC
W.R.A. Oil Co.
W5 Oil, LLC
Wachtman-Schroeder, a General Partnership
Walcher Oil, LC
Walcher, Wayne E.
Walker Tank Service, Inc
Walker, Ervin Gilbert
Waller Oil, LLC
Walton, Tara
War Cry, LLC
Warhorse Petroleum Inc
Warren American Oil Company LLC
Watt, Larry
Watts Tank Truck Service, Inc.
WCP Energy LLC
Webco Oil Company, Inc.
Weber Four Oil Co., Inc.
Webster Oil LLC
Wehmeyer, Gerald
Weigel Oil Company, LLC
Weinkauf Petroleum, Inc.
Well Tech Oil and Gas, Inc.
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Wells Oil, LLC
Wellwin Drilling Corporation
West Place Crude, LLC
West Plains Enterprises, Inc
Western Frontier Adventure, LLC
Western Operating Company
Western Pacific Farms, Inc.
Westgate Oil Company, Inc.
Westmore Drilling Company, Inc.
Wheeler Oil Company
Whitaker Companies, Inc.
Whitco Petroleum, LP
White & Ellis Drilling, Inc.
White Exploration, Inc.
White Hawk Oil Company, a General Partnership
White Hawk Oil Company, LLP
White Pine Petroleum Corporation
White, Kenneth S.
Whitetail Crude, Inc
Whitlow Energy, Inc.
Widrig Oil LLC
Wiesner, Tom Oil Operations
Wilcox Oil, LLC
Wild Colt Oil and Gas LLC
Wildcat Oil & Gas LLC
Wildcat Well Service
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Wildhorse Operating Company
Wilkinson Energy LLC
Williams Oil Company
Williams, M. A.
Williford Energy Company
Wilson County Holdings LLC
Wilton Petroleum, Inc.
Wind River Exploration Inc.
Winder Oil Company
Wineland Oil - LLC
Winterscheid Oil, LLC
Wirtz Oil, LLC
WM KS Energy Resources LLC
WMJ Oil Inc
Wood Energy, Inc.
Wood, E. H., Jr.
Woods Oil
Woolsey Operating Company, LLC
Woolsey Petroleum Corporation
Wrestler, David L., a General Partnership
Wrestler, Ronald D., a General Partnership
Wynn-Crosby Operating, Ltd.
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