• Aethon Energy Operating

• Abraxas Petroleum Corp

• Advanced Energy Services

• Alta Vista 

• Anadarko Petroleum Corp

• Anadarko Minerals, Inc

• Anschutz Exploration Corp

• Amplify Energy Group

• Apache Corporation 

• Argent Energy, Inc

• ATX Energy Partners 

• Axia Energy II\

• Bakken Oil Express

• Balidor Oil & Gas LLC 

• Ballard Petroleum Holdings, LLC

• Bayswater Exploration

• Behm Energy

• Berry Petroleum 

• Black Bear Energy, Inc

• Black Hills Exploration & Prod

• BP America Production Co

• Bruin E&P Operating, LLC

• BTA Oil Producers, LLC

• BXP Operating,LLC

• C-Mor Energy

• Centennial Resource Prod 

• Citation Oil & Gas Corp

• Chesapeake Operating, LLC

• Chipcore, LLC

• CKT Energy, LLC

• ConocoPhillips Company 

• Contango Rocky Mountain, Inc

• Continental Resources, Inc

• Cordero Energy Operating

• Crescent Point Energy 

• Crowheart Energy 

• Cypress Energy Partners 

• DD & J, LLC

• Denbury Company Group

• Devon Energy Production Co

• Diamondback Energy 

• E&B Natural Resources

• Edge Energy

• Elephant Operating 

• Encana

• Enduro Energy

• Enerflex Energy Solutions 

• EOG Resources, Inc 

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• EOG Y Resources, Inc

• Extraction Oil & Gas, LLC

• FDL Operating, LLC 

• Felix Energy

• Foreland Resources, LLC 

• Four Corners Petroleum, LLC

• Four Point Energy

• Gadeco, LLC

• Gas Ventures, LLC

• Grynberg Petroleum Co

• Guidon Energy 

• Halcon Operating Co

• Hat Creek Resources, LLC

• Helis Oil & Gas Co

• Highpoint Operating Co

• High Roller Wells, LLC

• Highland Natural Resources PLC

• Hunt Oil Company

• Huntington Energy, LLC

• Impact Exploration & Production

• Interstate Exploration, LLC

• Iron Oil Operating 

• Iskandia Energy Operating 

• Jagged Peak Energy, LLC

• Jonah Energy, LLC

• Justice Oil and Gas, LLC

• Kaiser-Francis Oil Co 

• Kraken Operating, LLC

• Legacy Reserves Operating LP 

• Liberty Resources Management

• Limerock Resources

• Linn Operating Inc. 

• Marathon Oil Company

• Marlin Oil Company, LLC

• Massif Oil & Gas Wyoming,  LLC

• Maximus Operating, Ltd

• Memorial Prod Operating, LLC

• Memorial Production Partners

• Merit Energy Company

• ML&E, LLC

• Mongoose Energy

• Murex Petroleum 

• Mustang Resources, LLC

• National Pride Operating Co

• Natrona County Holdings, LLC

• Navigation Powder River 

• Newfield Exploration Co 

• New Woods Petroleum 

• Newport Gas Partners, LLC

Operators 

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• NGL Water Solutions 

• Nine Point Energy 

• Northwestern Energy 

• Northwoods Operating

• Nonsuch Natural Gas, Inc

• North Plains Energy, LLC

• Northern Production Co, Inc

• NP Energy Corp

• Oasis Petroleum North America

• Occidental Oil & Gas Corp

• Panther Energy 

• Patriot Well Services

• Peak Exploration & Production, LLC

• Peak Powder River Resources

• Peregrine Petroleum

• PetroShale Inc.

• Providence Oil Development, LLC

• QEP Energy Company

• Quantum Resources Man. Co 

• Ranch Oil Company

• Resolute Natural Resources

• Rim Operating, Inc

• Rimrock Oil & Gas 

• RKI Energy Services

• RKI Exploration & Production, LLC 

• RM Resources, LLC 

• RSP Permian, LLC 

• Samson Exploration, LLC

• Samson Resources Company

• Seventy Seven Operating 

• Sheridan Production Co

• Skylar Exploration 

• SM Energy Company

• Southland Royalty Company 

• Synergy Resource

• TAQA North USA, Inc

• TC Oil Company

• Tesoro Companies, Inc

• Tesoro Logistics Operations, LLC

• Thunder Basin Resources 

• Titan Exploration 

• Triangle USA Petroleum Corp

• True Oil, LLC

• Ultra Resources, Inc

• Vanguard Operating, LLC

• Verdad Oil & Gas Company

• Vermilion Energy USA, LLC

• Vertex Energy Partners, LLC

​

• Wave Petroleum Operating, LLC

• Wellstar Corporation

• Western Energy Prod & Services

• Wexpro Company

• Wexpro Development Company

• Whiting Oil & Gas Corp

• Windsor Energy

• Wold Energy Partners, LLC 

• WPX Energy, LLC 

• XTO Energy, Inc 

• Yates Petroleum

• Zavanna, LLC 

Drilling/Workover

Rental/Motors 

Other 

• Akita Drilling 

• Basic Energy Services, LP

• Capstar Drilling, Inc

• Cyclone Drilling, Inc

• Elkhorn Services, Inc

• Ensign Energy Services, Inc

• Frontier Drilling, LLC

• Helmerich & Payne, Inc

• Independence Contract Drilling

• Key Energy 

• MBI Energy Services

• Nabors Corporate Services, Inc

• Noble Drilling Services, Inc

• Nomac Drilling Western Division

• Patterson-UTI Drilling Co

• Pinnacle Drilling Products, LP

• Pioneer Energy Services Corp

• Precision Drilling Corp

• Savanna Energy Services Corp

• Sidewinder Drilling

• SST Energy Corp

• Stoneham Drilling Corp

• Trinidad Drilling, Ltd

• True Drilling, LLC

• Unit Drilling Company

• White Mountain Operating 

• Xtreme Drilling Corporation 

​

• Baker Hughes, Inc

• Diablo Mud Motors

• Discovery Downhole 

• Flotek Industries

• KLX Energy Services, LLC

• Quail Tools, LP

• Redneck Pipe Rental

• Scientific Drilling International

• Sub Surface Tools

• Thomas Tools, Inc

• Tower Tools, LLC

• Tubular Solutions, Inc.

• Weatherford F & R 

• Baker Consulting, LLC 

• Bakken Thread Repair

• Bulldog Energy Services

• Casing Specialties, Inc

• Dakota Energy Technologies

• Dakota Prairie Refinery 

• Kennedy Fabrication 

• LEAM Drilling Systems, LLC

• MBI Energy

• Montana Dakota Utility 

• Precision Machine & Welding 

• Silver Creek Midstream 

• Sioux Ranch Inc.

• Titan Casing, LLC 

• WBI Energy