| Consultant companies starting with the letter A - 27 companies | | Abalt solutions Limited, United Kingdom | Aberdeen Drilling Consultants, United Kingdom | | Aberdeen Drilling Consultants, United Kingdom | Acute Technological Services, LLC, United States (USA) | | AcuTech Consulting Group, United States (USA) | Addiscombe Environmental Consultants Limited (AECL), United Kingdom | | Advanced Geotechnology, Canada | Advanced Resources International, Inc, United States (USA) | | Advanced Well Technologies ( Australia ), Australia | Advanced Well Technologies ( India ), India | | Advanced Well Technologies ( Malaysia ), Malaysia | Advanced Well Technologies ( Scotland ), United Kingdom | | AJM Petroleum Consultants, Canada | Alconsult International Ltd, Canada | | Alliance Drilling Consultants, L.L.C. | Alpine Environmental Ltd., Canada | | Altachem, Belgium | AMC Petroleum & Roadside, United Kingdom | | Ammonite Resources, United States (USA) | APEX Energy Consultants Inc., Canada | | Applied Economics Consulting Group, Inc., United States (USA) | Applied Geo Consultants, United Kingdom | | Applied Petroleum Technology AS, Norway | ARG Services Inc., Canada | | Argonauta Energy Services, United States (USA) | Associated Petroleum Consultants Ltd, United Kingdom |
| Consultant companies starting with the letter B - 24 companies | | B and R Co., United Kingdom | Badgwell & Associates, United States (USA) | | Baker & O'Brien, United States (USA) | Barnes & Click, Inc., United States (USA) | | Barrel Consultants Limited, United Kingdom | Battelle (USA), United States (USA) | | Bayphase Limited, United Kingdom | BC&T Consultants | | Beard Engineering, Inc., United States (USA) | Beardall, Parry & Associates, United Kingdom | | Beicip-Franlab, France | Berger/Abam Engineers Inc., United States (USA) | | Berwanger, Inc, United States (USA) | Blackbourn Geoconsulting, United Kingdom | | BLACKMIDAS (RS-ETC) | BOMEL Limited, United Kingdom | | Boost Consulting, United States (USA) | Boreas Consultants Ltd (UK), United Kingdom | | Boykiw & Company Ltd, Canada | BPP Technical Services, United Kingdom | | Brent & Trading, Spain | British Bulldogs (Consultants) Pte Ltd, Singapore | | BSI Industries, Inc., United States (USA) | BV Land Consulting Ltd., Canada |
| Consultant companies starting with the letter G - 9 companies | | Gaffney, Cline & Associates (Consultants) Pte. Ltd., Singapore | Gaffney, Cline & Associates Ltd (UK), United Kingdom | | GED Consulting Ltd, Canada | GED Consulting Ltd, Canada | | Genesis Oil & Gas Consultants Ltd, United Kingdom | Genesis Oil and Gas Consultants, United Kingdom | | Geoform Ltd, Switzerland | GLJ Petroleum Consultants Ltd., Canada |
| Consultant companies starting with the letter J - 0 companies |
| Consultant companies starting with the letter K - 1 companies |
| Consultant companies starting with the letter M - 9 companies | | Mad Rock Marine Solutions Inc, Canada | Marine Oil Transportation Consultants Inc., United States (USA) | | MatthewsDaniel, Norway | MBA Petroleum Consultants, Australia | | McDaniel & Associates Consultants Ltd, Canada | MHA Petroleum Consulting, Inc., United States (USA) | | Miller and Lents, Ltd., United States (USA) | MSE Consultants Ltd, United Kingdom |
| Consultant companies starting with the letter P - 24 companies | | P?yry Energy (Aberdeen) Ltd., United Kingdom | P?yry Energy AS, Norway | | P?yry Energy Pty Ltd, Australia | P?yry Energy Sdn Bhd, Malaysia | | PA Consulting Group, United Kingdom | PanTerra Geoconsultants B.V., Netherlands | | Pegasus International (UK) Ltd, United Kingdom | Penspen, United Kingdom | | Penspen International, United Arab Emirates | Penspen Limited (Indonesia), Indonesia | | Penspen Ltd (Greece), Greece | Performance Sciences, Inc., United States (USA) | | PetroAsian Energy Limited, Hong Kong | PetroDynamics Inc., United States (USA) | | Petroleum Consultant International, Pakistan | Petroleum Development Consultants (PDC), United Kingdom | | PetroStudies Consultants Inc., Canada | Petrox Energy Corp., United States (USA) | | PFC Energy, United States (USA) | Phasis Consulting, Canada | | PHH Petroleum Consultants Ltd., Canada | Platt, Sparks & Associates Consulting Petroleum Engineers, Inc, United States (USA) | | PMA Consultants | Process Solution Group (PSA) - NATCO Group, United States (USA) |
| Consultant companies starting with the letter Q - 0 companies |
| Consultant companies starting with the letter T - 10 companies | | Talburg Oil & Gas Consultants BV., Netherlands | Technocean AS, Norway | | Technology Trade International, Inc., United States (USA) | Technomanage Consultants, India | | TerraDat UK Ltd., United Kingdom | The Oil Marketer, United Kingdom | | TRACS International (UK), United Kingdom | Triangle Petroleum Corporation, Canada | | Trident Consultants, United Kingdom | TUV NEL Ltd, United Kingdom |
| Consultant companies starting with the letter V - 1 companies |
| Consultant companies starting with the letter X - 0 companies |
| Consultant companies starting with the letter Y - 0 companies |
| Consultant companies starting with the letter Z - 0 companies |
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