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Samsung Heavy Industries Co., Ltd.DAEWOO SHIPBUILDING & MARINE ENGINEERING Co., Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Halliburton Co.Petróleo Brasileiro SAChina Oilfield Services Ltd.Vetco Gray, Inc.Varco International, Inc.Oceaneering International, Inc.Vallourec SADril-Quip, Inc.National-Oilwell, Inc.Yantai CIMC Raffles Offshore Ltd.Transocean Sedco Forex Ventures Ltd.Bluewater Energy Services BVScientific Drilling International, Inc.Twister BVTrican Well Service Ltd.Anadarko Petroleum Corp.Maersk Drilling A/SInnovex Downhole Solutions, Inc.Bergstrom, Inc.Centek Ltd.Worldwide Oilfield Machine, Inc.MODEC, Inc.Japan Drilling Co., Ltd.Stena Drilling Ltd.Calfrac Well Services Ltd.Trendsetter Engineering, Inc.
BASF SEPetroChina Co., Ltd.Idemitsu Kosan Co., Ltd.Exxon Mobil Corp.Mobil Corp.Standard Oil Co.Osaka Gas Co., Ltd.Saudi Arabian Oil Co.Schlumberger Technologies, Inc.Standard Oil Co.Tokyo Gas Co., Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Schlumberger Canada Ltd.JSWChina General Nuclear Power Corp.China General Nuclear Power Corp.Chevron U.S.A., Inc.Voith GmbH & Co. KGaADuksan Co., Ltd.Dresser Industries, Inc.Dresser Industries, Inc.Beijing Yanshan Petrochemical Co., Ltd.Électricité de France SAElf Atochem SAHalliburton Co.Messer SE & Co. KGaA (Germany)Conoco, Inc.ConocoPhillipsSinopec Oilfield Service Corp.
Hilti AGSamsung Heavy Industries Co., Ltd.Makita Corp.Snap-On, Inc.Sandvik AktiebolagAlpha Corp. (Yokohama)Alpha Corp. (Yokohama)Mabuchi Motor Co., Ltd.Chicago Pneumatic Tool Co.China National Petroleum Corp. Drilling Research InstituteMetabowerke GmbHOSG Corp. (6136)Atlas Copco Industrial Technique ABVarco International, Inc.Caterpillar SARLFestool GmbHDePuy Mitek LLCCaterpillar SARLAssa Abloy Australia Pacific Pty Ltd.Harnischfeger Corp.US Synthetic Corp.Robert Bosch Tool Corp.Tornier SASGuhring, Inc.Mobiletron Electronics Co., Ltd.Shanghai SK Petroleum & Chemical Equipment Corp. Ltd.Truth Hardware Corp.Henan Huanghe Whirlwind Co., Ltd.Zahoransky AGKen Holding Co. Ltd.
Halliburton Energy Services, Inc.Halliburton Co.ConocoPhillipsSmith International, Inc.Marathon Oil Co.CNPC Bohai Drilling Engineering Co. Ltd.CNPC Bohai Drilling Engineering Co. Ltd.China Oilfield Services Ltd.Ceca SATracto Technik GmbH & Co. KGHerrenknecht AGElliott Co.Membrane Technology & Research, Inc.Scientific Drilling International, Inc.Trican Well Service Ltd.Hammelmann GmbHAnadarko Petroleum Corp.Maersk Drilling A/SApache Corp.Gyrodata, Inc.Yantai Jereh Oilfield Services Group Co. Ltd.Beijing Liuhe Greatness Technology Co., Ltd.Netzsch Gertebau GmbHNexen Corp.Leistritz AGDI Corp.Motive Drilling Technologies, Inc.Devon Energy Corp.Eco-Tec Ltd.TAM International, Inc.
PetroChina Co., Ltd.Idemitsu Kosan Co., Ltd.Exxon Mobil Corp.Mobil Corp.Standard Oil Co.W.R. Grace & Co.Osaka Gas Co., Ltd.Shell Oil Co.Standard Oil Co.China University of Petroleum (East China)Tokyo Gas Co., Ltd.China University of Petroleum (East China)Kolon Industries, Inc.Sanyo Chemical Industries Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Chevron U.S.A., Inc.Angang Steel Co., Ltd.Dresser Industries, Inc.Dresser Industries, Inc.Beijing Yanshan Petrochemical Co., Ltd.Albemarle Corp.ConocoPhillipsStorz GmbH & Co. KGTonen General Sekiyu KKElf Aquitaine FertilisantsElf Aquitaine FertilisantsEni SpASK Innovation Co., Ltd.TotalEnergies SE
Samsung Heavy Industries Co., Ltd.DAEWOO SHIPBUILDING & MARINE ENGINEERING Co., Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Halliburton Co.China Oilfield Services Ltd.Oceaneering International, Inc.Vallourec SADril-Quip, Inc.Yantai CIMC Raffles Offshore Ltd.Bluewater Energy Services BVScientific Drilling International, Inc.Twister BVTrican Well Service Ltd.Maersk Drilling A/STransocean Offshore Deepwater Drilling, Inc.MODEC, Inc.Helix Energy Solutions Group, Inc.Matrix Composites & Engineering Ltd.Calfrac Well Services Ltd.Trendsetter Engineering, Inc.Friede & Goldman Ltd.Technip USA, Inc.Diamond Offshore Drilling, Inc.Precision Drilling Corp.Sembcorp Marine Ltd.MISC Bhd.Altus Intervention Ltd.
ConocoPhillipsChina Oilfield Services Ltd.Suncor Energy, Inc.Bucyrus International, Inc.CARBO Ceramics, Inc.Syncrude Canada Ltd.Imperial Oil Ltd.Scientific Drilling International, Inc.Trican Well Service Ltd.Anadarko Petroleum Corp.RPC, Inc.Gyrodata, Inc.Devon Energy Corp.MTS Co., Ltd.Calfrac Well Services Ltd.Canadian Natural Resources Ltd.MEG Energy Corp.Osum Oil Sands Corp.Equinor Canada Ltd.Wild Well Control, Inc.Total E&P Canada Ltd.EOG Resources, Inc.Blue Spark Energy, Inc.STEP Energy Services Ltd.CVW CleanTech Inc.Diamond Offshore Drilling, Inc.Canadian Oil Sands Investments, Inc.Conval, Inc.Athabasca Oil Corp.Canadian Oil Sands Ltd.