michealselvam - Oil & Gas companies

§ American Eagle Oilfield Services & Supplies, Inc., Katy, Texas, United States of America; Independent

§ Anadarko Petroleum Corporation, The Woodlands, Texas, United States of America; Independent

§ Apache Corporation, Houston, Texas, United States of America; Independent

§ Arabian Gulf Oil Company (AGOCO), Libya

§ Arbusto Energy, dba: Spectrum 7, United States of America, Saudi Arabian, and possibly Swiss ownership. Bought out by Harken Oil & Gas in 1986

§ Assam Oil Company Ltd. (ACL), India

§ Assama Oil Services (Tripoli), Libya

§ Al-Obaid Oil Services (Dhanbad),India

§ Atlantic Petroleum, Faroe Islands

§ Athlone Group, United Kingdom

§ Bharat Petroleum Corporation Limited, India

§ BG Group, United Kingdom

§ BHP Billiton, Australia

§ BreitBurn Energy, California, United States of America

§ Buzachi Petroleum Operating, Kazakhstan

§ British Petroleum (BP), United Kingdom

§ Cairn Energy, United Kingdom

§ Canadian Natural Resources, Canada

§ Chevron Corporation, San Ramon, California, United States of America

§ Chem-Energy Corporation, United States of America

§ Chestnut Petroleum, Inc., Richardson, Texas, United States of America

§ Chief Oil and Gas, Dallas, Texas, United States of America

§ Citgo, Venezuela

§ CNOOC Ltd., China

§ ConocoPhillips, United States of America

§ Cooper Energy, Australia

§ Cosmo Oil Company, Japan

§ Crown Central Petroleum, United States of America

§ Cupet, Cuba

§ Denbury Resources, Inc., United States of America

§ Det Norske Oljeselskap ASA, Norway

§ Devon Energy, United States of America

§ Dong, Denmark

§ Ecopetrol, Colombia

§ Edoardo Raffinerie Garrone, Italy

§ Empresa Nacional del Petróleo (ENAP), Chile

§ Enbridge, Canada

§ EnCana, Canada

§ Energi Mega Persada, Indonesia

§ Energopetrol, Bosnia

§ ENSCO International, United States of America

§ Eni, Italy

§ ENX, Switzerland

§ ENXRU, Russia

§ Essar oil ltd., India

§ Entreprise Tunisienne d'Activites Petroliere (ETAP), Tunisia

§ Eser Corporation, United States of America

§ ExxonMobil, United States of America

§ First Texas Energy Corporation, United States of America

§ Flying Jadooo (for sale), United States of America

§ Galp Energia, Portugal

§ Gazprom, Russia

§ Geoexploration india, IN, India

§ Global Energy Swiss AG, ZUG, Swizterland

§ Greka Energy, United States of America

§ Grupa LOTOS, Poland

§ Gujarat Gas Co. Ltd., India

§ Gujarat State Petroleum Corporation, India

§ Gulf Oil, Luxembourg

§ Harken Energy Corporation, dba: HKN Southlake, Texas, United States of America of America

§ Hellenic Petroleum, Greece

§ Hess Corporation, United States of America

§ Hindustan Petroleum Corporation Ltd, India

§ Husky Energy, Canada

§ IB Daiwa, Japan

§ Imperial Oil, Canada

§ INA – Industrija Nafte, Croatia

§ Indian Oil Corporation, India

§ Inpex, Japan

§ Irkutsk Oil Company, Russia

§ Irving Oil, Canada

§ IQ Petroleum, USA

§ Japan Energy, Japan

§ Japan Petroleum Exploration Company Limited (JAPEX), Japan

§ Jay Oil, Iran

§ Kaz-Munay Gaz, Kazakhstan

§ Karazhanbas Munay, Kazakhstan

§ Korea National Oil Corporation(KNOC), South Korea

§ Koch Industries, United States of America

§ Kuwait German Petroleum Company, Canada

§ Kuwait Gulf Oil Company, Kuwait

§ Kuwait National Petroleum Company Kuwait.

§ Kuwait Oil Company, Kuwait

§ Kuwait Petroleum Corporation, Kuwait

§ Leowit Group Ltd, Hong Kong

§ LUKoil, Russia

§ M3nergy Gamma SDN. BHD., Malaysia

§ Maersk, Denmark

§ Marathon Oil Corporation, United States of America

§ Maurel & Prom, France

§ Mari Gas Company Limited, Pakistan

§ Maxol Group, Republic of Ireland

§ MedcoEnergi, Indonesia

§ Misc, Malaysia

§ MOL Group, Hungary

§ Naftna Industrija Srbije, Serbia

§ Naftogas of Ukraine, Ukraine

§ National Iranian Oil Company (NIOC), Iran

§ National Oil Corporation, Libya

§ Neste Oil, Finland

§ Nexen, Canada

§ Nippon Oil, Japan

§ NNPC, Nigeria

§ Northern Resources [1], Canada

§ Northern Oil and Gas [2], United States of America

§ Nusantara Oilfield Sdn. Bhd., Malaysia

§ Oil Planet International Corporation OPIC united States of America www.oilplanetinternationcorp.com

§ Oil and Gas Development Company Limited [3], Pakistan

§ Occidental Petroleum, United States of America

§ Oil India Limited, India

§ Oil and Natural Gas Corporation, India

§ OilandGasSuppliers.com [4], United States of America

§ Oman Oil Company (OOC), Oman

§ OMV, Austria

§ ONGC, India

§ PKN Orlen S.A., Poland

§ Pacific Rubiales Energy, Canada

§ PSO, Pakistan

§ Pakistan Petroleum Pakistan

§ Pasargad Oil, Iran

§ Petroleos Mexicanos, Mexico

§ Pertamina, Indonesia

§ Petróleos de Venezuela, Venezuela

§ PetroAlam, Egypt

§ Petroleum Development Oman,(PDO)

§ Perenco, France, United Kingdom

§ Petro-Canada, Canada

§ Petrobras, Brazil

§ PetroChina, China

§ PetroKazakhstan, Kazakhstan

§ Petrom, Romania

§ Petron Corporation, Philippines

§ PETRONAS, Malaysia

§ Petronet LNG Limited, India

§ Petropars Ltd., Iran

§ Petroperu, Peru

§ PETROTRIN, Trinidad and Tobago

§ PetroVietnam, Vietnam

§ Polish Oil and Gas Company, Poland

§ Plains Exploration & Production Company (PXP), United States of America

§ PTT Public Company Limited, Thailand

§ Qatar Petroleum, Qatar

§ Questar, United States of America

§ Reliance Industries Limited, India

§ Repsol YPF, Spain

§ Revus, Norway

§ Rompetrol Group N.V., Romania

§ Rosneft, Russia

§ Royal Dutch Shell, Netherlands, United Kingdom

§ RWE Dea AG, Germany

§ Sagiz Petroleum, Kazakhstan

§ Samir (Société Anonyme Marocaine de l'Industrie du Raffinage), Morocco

§ San-Ai Oil, Japan

§ Santos Limited, Australia

§ Sasol, South Africa

§ Saudi Aramco, Saudi Arabia (the largest in the world)

§ Schlumberger solutions France

§ Shell Canada, Canada (subsidiary of Royal Dutch Shell)

§ Shell Oil Company, United States of America (subsidiary of Royal Dutch Shell)

§ Sinclair Oil, United States of America

§ Sinopec, China

§ Snpc, Congo-Brazzaville

§ Sonangol, Angola

§ Sonatrach, Algeria

§ Sovereign Group, USA, Russia

§ Singapore Petroleum Company, Singapore

§ Statoil, Norway

§ State Oil Company of Azerbaijan, SOCAR Azerbaijan

§ Somerset Refinery, United States of America

§ St. Mary Land & Exploration, United States of America

§ State Oil Company of Suriname, Suriname

§ Suncor Energy, Canada

§ Surgutneftegaz, Russia

§ Syncrude, Canada

§ Talisman Energy, Canada

§ Tesoro, United States of America

§ Texaco, United States of America

§ THUMS, United States of America

§ Todd Energy, New Zealand

§ Total, France

§ Tullow Oil, United Kingdom

§ Türkiye Petrolleri Anonim Ortaklığı (TPAO), Turkey

§ United Refining Company, United States of America

§ Ucimet Ltd, UK

§ Vaalco Energy Inc., United States of America

§ Valero Energy Corporation, United States of America

§ Vegas Oil and Gas (Kriti), Egypt

§ Venoco Inc., United States of America

§ Wintershall, Germany

§ Woodside Petroleum, Australia

§ XTO Energy, United States of America

§ YPF, Argentina

§ YPFB, Bolivia

§ Zorro Oil, Jember

§ Halliburton, United States of America

OIL COMPANIES

A.O.Taftnet

A.P. Moller Group

Abraxas Petroleum

Abu Dhabi National Oil Company (ADNOC)

Adair International Oil and Gas, Inc.

Adda Resources Ltd.

AGIP Petroleum Co. Inc.- English

AgipPetroli - Italian

Alberta Energy Company

Amadeus Petroleum NL

Ambra Resources Group Inc.

Amerada Hess Corporation

American Shoreline, Inc.

Amity Oil N.L.

Amoco

AMSOIL

Anadarko Petroleum Corporation

Anderson Exploration Ltd.

ARCO (Atlantic Richfield Company)

Aruba Petroleum Incorporated

Ashland

Aspen Integrated Oil & Gas LLC

ASTRA Compañia Argentina de Petróleo S.A.

Australian Oil & Gas Corporation

Avid Oil & Gas Ltd.

Ayrex Resources Ltd.

Barnwell Industries, Inc.

Barrett Resources

Barrington Petroleum Ltd.

Bay State Gas Company

Baytex Energy

Bearcat Explorations Limited

Belair Energy Corporation

Belco Oil & Gas Corp.

Bellwether Exploration Company

Benson Petroleum Ltd.

Benton Oil and Gas Company

Benz Energy Ltd

Berkley Petroleum Corp.

Berry Petroleum Company

Best Pacific Resources Ltd.

BHP Hawaii

BHP Petroleum Company

Black Hills Exploration and Production

Black Star Oil Company

Bligh Oil and Minerals N.L

Blue Dolphin Energy Company

Boral Energy

Bow Valley Energy Ltd.

Bridgetown Energy Corporation

Brigham Exploration Company

British Gas

Broken Hill Proprietary Company (BHP)

Brooklyn Union Group

Burlington Resources Inc.

BXL Energy Ltd.

Cabot Oil & Gas Corporation

Caithness Petroleum

Cairn Energy PLC

Callon Petroleum Company

Camac Holdings, Inc.

Camberly Energy Ltd.

Cambrian Group

Canada Southern Petroleum

Canadian 88 Energy Corporation

Canadian Blackhawk Energy Inc.

Canadian Hunter Exploration Ltd.

Canadian Occidental Petroleum (CanadianOxy)

Canadian Occidental Petroleum Ltd.

Canargo Energy

Canbaikal Resources Inc

Canop Worldwide Corp.

Canrise Resources

CanScot Energy Corp.

Carnarvon Petroleum NL

Causeway Energy Corporation

Cavell Energy Corporation

CEC Resources, Ltd.

Centrica plc

Centurion Energy International, Inc

CEP International Petroleum

CGX Energy, Inc.

Chauvco Resources

Chesapeake Energy Corporation

Chevron Corporation

Chieftain International

Chiles Offshore

China National Offshore Oil Corporation (CNOOC)

China National Petroleum Corporation (CNPC)

China National Petroleum Corporation(CNPC)

Chinese Petroleum Corporation

Circumpacific Energy Corporation

Clayton Williams Energy, Inc.

Clyde Petroleum

CMS Energy Corporation

Coastal Corporation

Colorado Interstate Gas Company

Colt Energy

Columbia Energy Group

Compton Petroleum Corporation

Conoco

Conquest Resources Corporation

Consolidated Natural Gas Company

Continental Energy Corporation

Contour Energy Co.

Coplex Resources NL

Corridor Resources Inc.

Cortez Oil & Gas, Inc.

Costilla Energy

Courage Energy Inc.

Crest Petroleum Berhad

Crestar Energy Inc.

Crispin Energy Inc.

Cross Timbers Oil Company

Crown Petroleum LLC

Curlew Lake Resources Inc.

Daniel Explorations, Inc.

Danoil Energy Ltd.

Del Roca Energy Inc.

Denbury Resources Inc.

Derek Resources

Devlan Exploration Company

Devon Energy Corporation

DevX Energy, Inc.

Diamond Shamrock

Diaz Resources

Dominion Resources Inc.

DONG

Doreal Energy Corporation

Duke Energy Corporation

Dundee Petroleum Corp.

Dynamic Oil & Gas Inc.

Dynamic Ventures

Dynegy, Inc.

Eastway Petroleum Ltd.

Eaton Industries

Eckel

EEX Corporation

Edge Petroleum Corporation

Edgehill Exploration

El Paso Energy Corporation

Elf Aquitaine Group

Elf Exploration, Inc.

Empiric Energy, Inc.

Empresa Colombiana de Petroleos (Ecopetrol)

Encal Energy

Energen Corporation

Energie Baden-Wuerttemberg AG

Energy Africa

Energy Innovations Group

Energy Search Incorporated

Eni S.p.A. (AGIP)

Enron Oil & Gas Company

Enron Oil & Gas Company (EOG Resources)

Enterprise Oil Plc

EOG Resources

EOTT Energy Partners, L.P.

Equitable Resources, Inc.

Equity Oil Company

Esenjay Exploration, Inc.

Evergreen Resources, Inc.

Fletcher Challenge Energy

Foothills Oil and Gas Ltd.

Foreland Corporation

Forest Oil Corporation

Fortum Oil & Gas

Founders Energy Ltd.

Fox Energy Corporation

Frontier Natural Gas Corporation

Gentry Resources Ltd.

Gibraltar Energy Company

Givot Olam Oil Ltd.

Global Marine

Globex Resources Energy Company

Golden Gate Resources Ltd

Goodrich Petroleum Corporation

Greka Energy Corporation

Grenley Stewart Resources

Grey Wolf Exploration Inc.

Gulf Canada Resources Ltd.

Gulf Stream Resources

Gulfport Energy, Inc.

Gulfstream Resources Canada Limited

Hanwha Energy Company

Harbour Petroleum Company

HARC Geotechnology

Hardy Oil & Gas

Harken Energy Corporation

Hegyi GeoTechnologies International

Highland Energy Inc.

Hindustan Petroleum Corporation Ltd.

Houston Exploration Company

HS Resources Inc.

Huber Energy

Hurricane Hydrocarbons Ltd.

Husky Oil

Iceland Oil

Icon Oil N.L.

Imperial Oil Ltd. (Esso)

Indo-Pacific Energy Ltd.

INKOMI

Integra Resources Ltd.

Interaction Resources Ltd.

InterCorr International, Inc.

Interpex

Intevep

Inuvialuit Petroleum Corporation

Invader Exploration Inc.

J. M. Huber Corporation

Kerr-McGee Corporation

Kestrel Energy

Key West Energy Corporation

KeySpan Energy Delivery

Kinder Morgan Energy Partners, L.P.

Kismet Enery Corporation

KN Energy

Koch Industries, Inc.

Korea Gas Corporation (KOGAS)

Korea National Oil Company

Krosno Oil & Gas Enterprise

Kuwait National Petroleum Company

Lakes Oil N.L.

Lario Oil & Gas Company

LASMO plc

Lexam Explorations

Louis Dreyfus Natural Gas Corp.

Louisiana Land and Exploration Company

Lubriplate Lubricants

Lucas Energy

LUKOIL

Lundin Oil AB

M. E. Operating and Services, Inc.

Maersk Olie og Gas

Magellan Petroleum Corporation

Magin Energy

Magnum Petroleum, Inc.

Manti Resources, Inc.

Marathon Oil

MarkWest Hydrocarbon, Inc.

Maverick Energy & Development Corporation

Maverick Energy, Inc.

McFarland Energy, Inc.

McMoRan Oil & Gas Co.

McMoran Oil and Gas (MOXY)

MCN Energy Group Inc.

MDU Resources Group, Inc.

Mera Petroleums Inc.

Meridian Resource Corporation (TMRC)

Miller Energy, Inc.

Miller Exploration Company

Ministry of Energy and Infrastructure

Mitchell Energy & Development Corp.

MMS Petroleum PLC

Mobil Oil Corporation

Mosaic Oil

Mosaic Oil N.L.

Mueller Exploration

Murphy Oil Corporation

National-Oilwell

NCE Resources Group

Neste Oil & Gas

New Horizon Exploration Inc.

Newfield Exploration Company

Newquest Energy, Inc.

North Coast Energy, Inc.

Northstar Energy, Inc.

Northwest Natural Gas Company

Norwegian Energy (UK) Ltd.

Nova

Novus Petroleum Limited

Obele Oil Corporation

Occidental Petroleum Corporation

Ocean Energy, Inc.

Oil & Natural Gas Corporation Limited

PanAfrican Energy Corporation Ltd PanCanadian

PanCanadian Petroleum Limited

PanOil Resources Ltd.

Parallel Petroleum Corporation

PECO Energy

Penneco Oil Company, Inc.

Pennzoil Company

Perez Companc S.A.

Pertamina

Petrobank Energy and Resources Ltd.

Petrobras

Petro-Canada

PetroCorp Inc.

Petroleo Brasileiro (PETROBRAS)

Petróleos de Venezuela (PDVSA)

Petróleos Mexicanos (Pemex)

Petroleum Authority of Thailand

Petroleum Development Corporation

Petroliam Nasional Berhad (PETRONAS)

Petromet Resources Limited

Petrominerals Corporation

PetroQuest Energy, Inc.

Petroz NL

Petro Vietnam

Petsec Energy Ltd.

Phillips Petroleum Company

Phoenix Resources LLC

Pinnacle Oil International Inc.

Pioneer Natural Resources Canada Inc.

Pioneer Natural Resources, USA

Pioneer Oil and Gas

PIRA Energy Group

Place Resources Corporation

PLEXUS Energy Ltd.

Polish Oil and Gas Company

Portfolio Oil & Gas, Inc

Power Exploration, Inc.

Prairie Pacific Energy Corporation

Premier Oil

Prima Energy Corporation

PrimeWest Energy Trust

Primo Resources Ltd.

Production Gathering Company, LLC

Qatar General Petroleum Corporation

Questar Corporation

Quicksilver Resources

Raider Resources Ltd.

Rapidfire Resources Ltd.

Raptor Capital Corporation

Regent Resources Ltd.

REPSOL YPF

Repsol-YPF S. A.

Ridel Resources Ltd.

RIO Nevada Energy Inc.

Rising Star Energy

River Oil & Gas Inc.

ROCO Petroleum, Incorporated

Rosewood Resources

Royale Energy Inc.

Ruhrgas AG

Ruwco Oil and Gas Corporation

Ruwwe and Glasscock

RWE-DEA

RWE-DEA Norge

Sable Offshore Energy

Saga Petroleum

Samson Investment Company

Sasol Petroleum International (Pty) Ltd.

Saudi Aramco

Scandpower

Schwanberg International

Scimitar Hydrocarbons Corporation

Scotia Group

Search Energy Corp.

Seine River Resources, Inc.

Seneca Resources Corporation

Servo-Dynamics, Inc.

Seven Seas Petroleum Inc.

Seventh Energy Ltd.

Sharpe Resources Corporation

Shell Europe (euroShell)

Sinochem International Oil Co.

Slovene Oil Company

SOCDET Management Limited

Solv-Ex Corporation

Sonat Exploration

South Jersey Industries, Inc.

Southern Mineral Corporation

Southward Energy Ltd.

Southwestern Energy Company

Spire Energy Ltd.

St. Mary Land & Exploration Company

Statoil

Stewart Petroleum Corporation

Storm Energy Inc.

Stratic Energy Corporation

Summit Resources

Suncor Energy

Sunoco, Inc.

Surge Petroleum, Inc.

Swift Energy Company

Sydney Oil Company Drilling and Exploration Trust
(SOCDET)

Syncrude Canada Ltd.

Synergos International Oil & Gas, LLC

Syntroleum Corporation

Syntron

Talisman Energy

Talon Development Company

Talon Production, Inc.

Tejas Power

Tengasco, Inc.

Tethys Energy Inc.

Texaco, Inc.

Texas Meridian Resources Corporation

Texican Natural Gas

Texoil Oil and Gas

The American Energy Group

Thunder Energy Inc.

Tipperary Corporation

Tokyo Gas Company

Tom Brown, Inc.

Torch Energy Advisors Incorporated

Toreador Royalty Corporation

Torino Oil & Gas Limited

Tracer Petroleum Corporation

Trans-Dominion Energy Corporation

TransGlobe Energy Corporation

Trans-Orient Petroleum Ltd.

TransTexas Gas Corporation

Triton Energy

Triumph Energy Corporation

Tri-Valley Corporation

Turkish Petroleum

Turkish Petroleum Corporation (TPAO)

Tusk Energy Inc.

U.S. Crude Ltd.

U.S. Energy Corp.

U.S. Oil and Gas Inc.

Ulster Petroleum Ltd.

Ultra Petroleum Corp.

Ultramar Diamond Shamrock Corporation

Union Texas Petroleum

Unit Corporation

United Heritage Corporation

United Meridian Corporation

Valero Energy Corporation

Valvoline

Van Meurs & Associates

Vanco Energy Company

Vangaurd Oil Corporation

Vastar Resources, Inc.

VEBA Oel AG

Vector Energy Corporation

Velvet Exploration Ltd.

Venus Exploration

Veritas Associates

Vermilion Resources Ltd.

Victoria Petroleum N.L.

Vital Visions

Vortex Energy & Minerals Ltd.

Ward Petroleum Corporation

West Oil NL

Westcoast Energy Inc.

Western Gas Resources, Inc.

Westminster Resources Ltd.

Westside Energy Corp.

WhitMar Exploration Company

Williams Companies

Wintershall

Wiser Oil Company, The

Wolverine Energy Corp.

Woodside Petroleum Ltd.

Yukong

Zarara Oil & Gas Limited

Zavanna, LLC

DRILLING COMPANIES

Alexander Drilling Inc., USA

Atwood Oceanics, Inc., USA

Aztec International Inc., Thailand

Bandera Drilling, USA

Big 6 Drilling, USA

Bulf Drilling & Oil Servicii SRL, Romania

Caza Drilling, Inc., USA

Challenger International, USA

Chiles Offshore - USA

Compagnie Tunisienne de Forage, Tunisia

CROSCO Integrated Drilling & Well Services Company, Ltd., Croatia

Cyclone Drilling, Inc., USA

Dewanchand Ramsaran Industries (P) Ltd., India

Diamond Offshore Drilling, Inc., USA

Dolphin Drilling Ltd., Norway/United Kingdom

Egyptian Drilling Company, Egypt

ENSCO International Inc., USA

Felderhoff Brothers Drilling, USA

Frigstad Offshore Pte. Ltd., Singapore

Frontier Drilling ASA, Norway

George N. Mitchell Drilling Co, USA

GlobalSantaFe Corp, USA

Grant Prideco, USA

Great Wall Drilling Company, P.R. China

Grey Wolf Inc, USA

Gunnebo Johnson Corporation, USA

Heart Land Drilling, Inc., USA

Helmerich & Payne International Drilling Co., USA

Image Drilling

ITAG Tiefbohr GmbH & Co., Germany

IRoilRigs International LTD, China

Japan Drilling Co., Ltd., Japan

Jindal Drilling & Industries Ltd., India

Justiss Oil Co., USA

KCA Deutag Drilling Ltd., United Kingdom

Kenai Drilling, USA

Maersk Contractors, Denmark

Martex Drilling, USA

MB Petroleum Services, Sultanate of Oman

MND Servisni a.s., Czech Republic

Mesa Drilling, USA

Moncla Wellservice, USA

Nabors Industries Inc, USA

Nicklos Drilling Company, USA

Noble Corp., USA

Oil & Gas Explorations Company, Cracow LTD, Poland

Oil & Natural Gas Corporation Limited, India

Parker Drilling Company, USA

Patterson - UTI Energy Inc, USA

Paul Graham Drilling, USA

Pergemine S.p.A., Italy

Petcon (M.) Sdn. Bhd., Malaysia

Petroleos de Venezuela, S.A. (PDVSA), Venezuela

Petrorama Trading LLC, United Arab Emirates

Pioneer Drilling Company, USA

Poszukiwania Nafty i Gazu "NAFTA" Sp. z o.o., Poland

Precision Drilling International, Canada

Pride International, USA

Rompetrol, Romania

Rotary Drilling Services Company Ltd., Thailand

Rowan Companies Inc., USA

Saudi Aramco, Saudi Arabia

Scandrill Inc., USA

Schlumberger, France/USA

Spradling Oil Inc., USA

SST Energy Corporation, USA

Superior Energy Services, USA

S W Jack Drilling Company, USA

Technicoil Integrated Services, Inc., USA

Tesco Corporation (US), USA

Transocean Inc., USA

True Drilling L.L.C., USA

Union Drilling, Inc., USA

Unit Corporation, USA

Western Drilling, USA

Wisco-Moran Drilling Company, USA

Zaklad Robot Gorniczych, Poland