Oil & Gas Operations

Gress Oil & Gas, Inc.

Greystone Inc.

Phone: (785) 259-5575

Griffin Resources, Inc.

Phone: (205) 468-7193

Griffin Resources, LLC

Phone: (405) 853-4688

Griffith Petroleum Services, Inc.

GRMR Oil & Gas

Phone: (720) 235-5071

Groves, Phil Oil

Phone: (620) 442-0480

Grynberg Petroleum Co.

Guin, Don L.

Phone: (903) 561-1159

Guinn Co., LLC

Phone: (405) 289-3319

Gulf Coast Energy Resources, LLC

Gulf Energy Exploration Corp.

Phone: (512) 335-4800

Gulf Exploration, LLC

Gulf South Operationss, Inc.

Gulfport Energy Corp.

Phone: (740) 251-0407

Gunner Oil Co.

Phone: (316) 744-2077

Gunnison Energy LLC (GELLC)

Gyro Petroleum

Phone: (806) 352-1106

H&H Oil Co.

Phone: (620) 289-4370

H-Petro-R, Inc.

H.J. Inc.

Haas Petroleum LLC

Habanero Oil & Gas Operating, LLC

Halcon Resources Corp.

Hale, Frank, Oil Operations

Hall, Greg, Oil & Gas, LLC

Phone: (405) 285-2588

Halliburton Operating Co.

Hampton Corp., The

Phone: (405) 364-7799

Hankey Oil Co.

Hanna Oil & Gas Co.

Phone: (479) 782-8808

Hannathon Petroleum, LLC

Phone: (432) 687-3700

Hard Rock Exploration, Inc.

Harding & Shelton, Inc.

Phone: (405) 236-0080

Harding Co.

Harper, Clint, Inc.

Phone: (940) 888-2540

Harrod Leasing

Phone: (580) 925-3013

Hart Energies, LLC

Phone: (918) 633-4161

Hartman Oil Co., Inc.

Harvard Petroleum Corp.

Phone: (575) 623-1581

Harvest Petroleum, Inc.

Phone: (972) 347-1112

Harvick Oil Co.

Hat Production, LLC

Phone: (913) 795-4348

Hawkins, G. A.

Hawley-Desimon, Inc.

Hayes Oil & Gas, LLC

Phone: (620) 254-7204

HB Energy, LLC

Phone: (785) 979-9493

Heath, Mark

Phone: (620) 874-5001

Hefner & Associates

Helis Oil & Gas Co. LLC

Hembree, Robert F.

Phone: (785) 798-3595

Henry Petroleum, Inc.

Phone: (405) 286-2202

Henry, John, Petroleum, Inc.

Herd Partners Ltd.

Phone: (432) 684-5591

Heritage Petroleum, Inc.

Herrmann Energy

Phone: (806) 355-4409

Hertel Oil Co., LLC

Phone: (785) 628-2445

Hess Corp.

Phone: (701) 575-4226

Heyco Energy Group, Inc.

HG Energy, LLC

Hibernia Resources, LLC

High Energy

Phone: (918) 225-2992

High Plains Petroleum, LLC

Phone: (479) 644-1554

High Roller Wells, LLC

Highway 3 Oil, LLC

Phone: (618) 298-2280

Hilcorp Energy Co.

Phone: (713) 209-2400

Hill Resources, Inc.

Hill, R. M., Operating, Inc.

Hillhouse Resources, LLC

Phone: (713) 968-9855

Hodges & Rister

Phone: (325) 672-8379

Hoener, Ross

Phone: (620) 546-2596

Hoermann, S. E.

Phone: (830) 379-7722

Hoffmann Oil Co.

Holifield Energy Co.

Phone: (979) 542-3900

Holloway Oil Well Service Co.

Phone: (918) 759-0723

Homeland Energy, GP

Honey Well, LLC

Phone: (913) 544-5121

Hoosier Energy REC, Inc.

Hope Energy, LLC

Phone: (325) 207-2988

Horizon Oil Co.

Hornet Oil & Gas Corp.

Houston Energy, LP

Howard & Taylor Co.

Phone: (580) 868-3387

Howard Drilling, Inc.

Phone: (814) 778-5820

Howard Energy Corp.

Phone: (618) 263-3000

Howell's Oil & Gas

Phone: (740) 934-2368

HTC Gas Co., LLC

Hudson Group, LLC

Hudson, Larry

Phone: (618) 395-1403

Huggs, Inc.

Hughes, Dan A., Co., LP

Hulen Operating Co.

Hulse, Tommy P.

Phone: (940) 631-5353

Hunt Oil Co.

Phone: (701) 852-0504

Hurd Enterprises, Ltd.

Hutchinson Oil Co.

Phone: (316) 788-5440

Incline Energy, Inc.

Independence Resources Management, LLC

Phone: (832) 916-2300

Indian Oil Co., Inc.

Phone: (620) 886-3763

Indigo Minerals, LLC

Inflection Energy, LLC