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Dresser Industries, Inc.Petrolite Corp.Weatherford U.S. LPGuizhou Gaofeng Petroleum Machinery Co., Ltd.Thermax Ltd.Baker Hughes ESP, Inc.U.S. Well Services LLCUfa State Petroleum Technological UniversityLubrizol Oilfield Solutions, Inc.Gulf Canada Resources Ltd.The Petroleum Oil & Gas Corporation of South Africa (Pty) Ltd.Essef Corp.Teleco Oilfield Services, Inc.Essef Corp.Enpro Subsea Ltd.Fracmaster Ltd.AVA International CorpShengli Petroleum Administrative BureauTuboscope Vetco International, Inc.Tuboscope Vetco International, Inc.Ruhrpumpen GmbHForchem OyAbrado, Inc.POM, Inc.HYUNDAI Corp.Weatherford Canada Ltd.Control Flow, Inc.Shengli Oil Field Dongsheng Precision Petroleum Dev Co., Ltd.Xinjiang Zhundong Petroleum Technology Co. Ltd.Shengli Oil Field Dongsheng Precision Petroleum Dev Co., Ltd.
PetroChina Co., Ltd.Idemitsu Kosan Co., Ltd.Mobil Corp.Exxon Mobil Corp.Standard Oil Co.Saudi Arabian Oil Co.China National Petroleum Corp.Osaka Gas Co., Ltd.Schlumberger Technologies, Inc.Standard Oil Co.Tokyo Gas Co., Ltd.Elf Atochem SAChina National Offshore Oil Corp.China National Offshore Oil Corp.JSWChina General Nuclear Power Corp.Voith GmbH & Co. KGaADuksan Co., Ltd.Beijing Yanshan Petrochemical Co., Ltd.Dresser Industries, Inc.Dresser Industries, Inc.Électricité de France SAElf Aquitaine FertilisantsHalliburton Co.Shell Deepwater Development, Inc.Messer SE & Co. KGaA (Germany)Eni SpAConoco, Inc.ConocoPhillipsSinopec Oilfield Service Corp.
NIPPON STEEL Stainless Steel Corp.JFE Steel Corp.NKK Corp.NKK Corp.China National Petroleum Corp.Schlumberger Technologies, Inc.JX Nippon Mining & Metals Corp.Baoshan Iron & Steel Co., Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Tanaka Kikinzoku Kogyo KKTanaka Holdings Co. Ltd.Sankyo Aluminum Industry Co., Ltd.Dresser Industries, Inc.Shanghai Huahong Grace Semiconductor Manufacturing Corp.Halliburton Co.Jinchuan Group Co., Ltd.Armstrong Ceiling Solutions (Australia) Pty Ltd.Sinopec Oilfield Service Corp.thyssenkrupp Steel Europe AGToyo Kohan Co., Ltd.Senju Metal Industry Co., Ltd.Usui International Industry Co., LtdVallourec Oil & Gas France SASCNOOC Energy Technology & Services Ltd.Shougang Group Co., Ltd.Nanjing Iron & Steel Co., Ltd.Heraeus Precious Metals GmbH & Co. KGWuhan Iron & Steel Group Corp.Nippon Steel Metal Products Co., Ltd
Halliburton Co.CNPC Bohai Drilling Engineering Co. Ltd.CNPC Bohai Drilling Engineering Co. Ltd.Varco International, Inc.Daido Kogyo Co., Ltd.Dril-Quip, Inc.C. & J. Clark International Ltd.Anton Oilfield Services (Group) Ltd.Trican Well Service Ltd.DynaEnergetics GmbH & Co. KGRPC, Inc.Innovex Downhole Solutions, Inc.Gyrodata, Inc.Valaris PlcTuboscope Vetco International, Inc.Tuboscope Vetco International, Inc.Centek Ltd.Tong Oil Tools Co., Ltd.Premier Coil Solutions, Inc.Bilco Tools, Inc.Calfrac Well Services Ltd.Stimline ASSchoeller-Bleckmann Oilfield Equipment AGAnTech Ltd.Rosneft Oil Co.Magnum Oil Tools International Ltd.Wenzel Downhole Tools Ltd.FHE USA LLCHydra-Rig, Inc.Beijing Yilong Hengye Petroleum Engineering Tech Co., Ltd.
Varco International, Inc.Nokia of America Corp.Lantiq Beteiligungs GmbH & Co. KGBCE, Inc.Diseño de Sistemas en Silicio SACisco Systems, Inc.Reeves Wireline Technologies Ltd.Geoservices SASondex Ltd.Sondex Wireline Ltd.Optiva, Inc.RadiSys Corp.Wireline Engineering Ltd.Cudd Pressure Control, Inc.Sierra Monolithics, Inc.Netrake Corp.Metanoia Communication, Inc.Accurate Technologies, Inc.Turin Networks, Inc.Symbolic Logic, Inc.Veraz Networks, Inc.General Communication, Inc.Balance Point Control BVFrequency Electronics, Inc.Express Energy Services Operating LPTier 1 Energy Solutions, Inc.Hunting Energy Services (Well Intervention) Ltd.ECtel Ltd.Ditech Networks, Inc.UET United Electronic Technology AG
Hitachi Construction Machinery Co., Ltd.Idemitsu Kosan Co., Ltd.Taiyuan University of TechnologyAngang Steel Co., Ltd.Xi'an University of Science & TechnologyChina Shenhua Energy Co., Ltd.China Energy Investment Corp., Ltd.Wuhan Iron & Steel Group Corp.Aluminium Pechiney SASUHuaneng Power International, Inc.Huainan Mining (Group) Co., Ltd.Sany Heavy Equipment Co., Ltd.China National Heavy Machinery Research Institute Co., Ltd.Tokai Carbon Co., Ltd.Heilongjiang University of Science & TechnologyGuangdong Zhongnan Iron & Steel Co., Ltd.Joy Manufacturing Co.Vale SAChina Shenhua Coal to Liquid & Chemical Co., Ltd.SGIS Songshan Co., Ltd.Tiandi Science & Technology Co., Ltd.Charbonnages de FranceBaosteel Group Xinjiang Bayi Iron & Steel Co., Ltd.Wengfu (Group) Co., Ltd.Wengfu (Group) Co., Ltd.Jinneng Holding Equipment Manufacturing Group Co. Ltd.Hydril Co.Phillips 66Hydril Co.Jinneng Holdings Coal Industry Group Co., Ltd.
Sany Heavy Equipment Co., Ltd.China National Heavy Machinery Research Institute Co., Ltd.Joy Manufacturing Co.Hydril Co.Hydril Co.Bucyrus International, Inc.China Coal Beijing Coal Mining Machinery Co. Ltd.ABB Vetco Gray, Inc.Tone Boring Co., Ltd.Rex Industries Co., Ltd.Bosun Co., Ltd.Lubrizol Oilfield Solutions, Inc.Shinhan Diamond Industrial Co., Ltd.Shinhan Diamond Industrial Co., Ltd.CONSEC CORP.MAN TAKRAF Frdertechnik GmbHMAN TAKRAF Frdertechnik GmbHFriedrich Duss Maschinenfabrik GmbH & Co. KGInterwell Norway ASNational Mine Service Co.Kelamayi Keli New Technology Industrial Development Co. Ltd.National Mine Service Co.Chengdu Ouxun Technology Co., Ltd.Boart Longyear, Inc.Petreco International, Inc.Minova Australia Pty Ltd.Henan Energy Chemical Group Heavy Equipment Co., Ltd.CLEANTEK Industries, Inc. /Old/Oilflow Solutions, Inc.Oilflow Solutions, Inc.