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Oil and Gas Field Exploration Services (7,044)

Aerial Geophysical Exploration, Oil and Gas (35)

   Screaming Eagle Aviation

   Transatlantic Exploration Ltd

   Bean, Chris Oil & Gas Service

   Jay Management Company, LLC

   Secure Energy LLC

   Nustar Joint Ventures

   Midwest Custom Chemicals Inc

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Drilling Consultants (4)

   Rock Run Enterprises LLC

   KELLID LIFTING SYSTEMS

   Tri State Oilfield Services LLC

   P.I. Castro Inc.

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Geological Exploration, Oil and Gas Field (253)

   Core Laboratories L P

   Havens Oil Co

   Hansen Exploration

   Vaughan Exploration Inc

   Cairn Petroleum LLC

   Harvest Oil & Gas, LLC

   Heck Exploration CO

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Geophysical Exploration, Oil and Gas Field (113)

   Denke Oil Company

   Fairfield Industries

   Alpine Ocean Seismic Survey, Inc

   Hill Geophysical Consulting

   Ocean Geophysical Services, Inc

   Genesis

   Strategic Exploration Inc

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Natural Explorers Resources (13)

   Lab Pros Inc

   Lab Pros Inc

   World Resources Group LLC

   Longbow LLC

   Gibson Exploration LLC

   Mclean Plunger Lift Inc

   Eco-Me

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Oil Reports (17)

   Drilling Reports

   Manna Services

   Hpdi

   Ihs Energy

   Subsurface Library

   B L Resources

   Ihs Energy

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Oil and Gas Consultant (96)

   Pitchfork Oil & Gas CO

   Quantum Resources Management

   Rockcastle Energy Corp

   Sanders, Larry

   Cleroy Inc

   Chesapeake Operating Inc

   Demar Oil & Gas Consultants

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Oil and Gas Exploration and Development (6,239)

   Bay State Exploration, Inc

   Belden & Blake Corp

   Strat Petroleum, Ltd

   Watkins, Douglas B

   Dominion Exploration & Prdctn

   Dcp Midstream

   Petrohawk

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Seismic Data Brokers (10)

   Frontier Petroleum Service Inc

   Geophysical Pursuit Inc

   Petroleum Geo-Services Inc

   Seismic Exchange Inc

   Willisco

   Behnam & Assoc. Inc.

   Seismic Assistants Ltd

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Seismograph Service (264)

   Seismic Exchange Inc

   Echo Geophysical Inc

   Seismic Ventures, Inc

   Schlumberger Western Geco

   Mccolgan Seismic Interpretatio

   Omni Energy Service Corp

   Seismic Resources Inc

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