Operator List: H

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H & B Petroleum Corp. H & C Oil Operating Inc. H & D Exploration LLC H & H Oil Co. H & H Oil, LLC H & L Operating Co. H & L Oprerating Company LLP H & M Packers Serv. L.L.C. H & M Petroleum Corporation H & S Oil Co., LLC H&G Pulling & Rotary Drilling, Inc. H-D Oilfield Service, Inc. H3 Oil & Gas Haack Operating Company Haas Petroleum, LLC Habit Petroleum, LLC Hacker, Jack Hadaway Consulting and Engineering LLC Haddock, Jack L. Haffner, Dan Haile, Guy W. Hall Oil & Gas, LLC Hall, Michael Wayne Hallwood Petroleum, Inc. Hammer MacLean ETAL Hammerschmidt, William E Har-Ken Agent, OK Harper Oil and Gas, LLC Harper Oil Co. Harris, David Hart, Nick and Connie Hartman Oil Co., Inc. HAT Production LLC Haul-Pac, Inc.

Hawkins Oil, LLC Hayden Operating Hayes Oil & Gas LLC Hazen, Ty Anthony HB Energy LLC HD Well Services LLC HDH Resources, Inc. Heath Farms Heller, Phillip & Charlene Helm Energy Company Helmerich & Payne, Inc. Helsel, Allan J Hembree Oil Production, LLC Hembree Oilfield Services, LLC Hensley Oil Company LLC Heritage Oil L.L.C. Herman Krug - Oil Operations Herman L. Loeb, LLC Hermreck Oil Company Hertel Oil Company LLC Hess Oil Company Hesse Petroleum Co.,L.L.C. Hessert Loc Inc Hett Oil & Gas, LLC HG Oil Holdings, LLC Higginbottom Engineering, Inc. High Bluff Operating LLC High Plains Production, LLC Hill Oil and Gas Co., Inc. Hillenburg Oil Co., a General Partnership HJ, Inc. HKW Oil Company, Inc. Hodges Oil Hodges, Dennis D. and Peggy D.

Hoehn Oil LLC Hoener, Ross Hoepker, Larry Hoffman Oil, Inc. Hoffman Resources LLC Hoffman, Brian Holland, Nancy G. Holt, Carol Holtom, Bill, A General Partnership Honey Well, LLC Hopkins, George Allen Hopper Oil Co., Inc. Horseshoe Operating, Inc. Horton, John House, Dustin Howell Oil Company, Inc. Hoxie Tank, Inc. HRM Resources II, LLC Huber Oil Company, a General Partnership Huber, J.M. Corporation Hughes Drilling Co, a General Partnership Hughes Services, LLC Hugoton Energy Corporation Hull Oil, LLC Humerickhouse Oil, LLC Hummingbird Oil, LLC Hummon Corporation Hunt Oil, LLC Hupfer Operating, Inc. Hurricane Services, Inc. Hutchinson Oil Co.