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Halliburton Energy Services, Inc.JFE Steel Corp.Marathon Oil Co.CNPC Bohai Drilling Engineering Co. Ltd.CNPC Bohai Drilling Engineering Co. Ltd.Ceca SAVallourec SACARBO Ceramics, Inc.Elliott Co.Membrane Technology & Research, Inc.Grant Prideco, Inc.Wuxi Seamless Oil Pipe Co. Ltd.Scientific Drilling International, Inc.Trican Well Service Ltd.Hammelmann GmbHIntelliserv, Inc.Gyrodata, Inc.Yantai Jereh Oilfield Services Group Co. Ltd.Netzsch Gertebau GmbHNexen Corp.Chimec SpALeistritz AGDI Corp.Tianhe Oil Group Huifeng Petroleum Equipment Co. Ltd.Devon Energy Corp.voestalpine Tubulars GmbH & Co. KGEco-Tec Ltd.TAM International, Inc.Shanxi Fenglei Drilling Tools Co. Ltd.Hilong Group of Companies Ltd.
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.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.Conoco, Inc.
NIPPON STEEL Stainless Steel Corp.JFE Steel Corp.NKK Corp.NKK Corp.Sumitomo Metal Mining Co. Ltd.Schlumberger Technologies, Inc.JX Nippon Mining & Metals Corp.JX Nippon Mining & Metals Corp.Baoshan Iron & Steel Co., Ltd.Baoshan Iron & Steel Co., Ltd.NIPPON STEEL Stainless Steel Corp.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.Dresser Industries, Inc.Halliburton Co.Jinchuan Group Co., Ltd.Armstrong Ceiling Solutions (Australia) Pty Ltd.Sinopec Oilfield Service Corp.Toyo Kohan Co., Ltd.thyssenkrupp Steel Europe AGUsui Co. Ltd.Senju Metal Industry Co., Ltd.Shanxi Taigang Stainless Steel Co., Ltd.Shougang Group Co., Ltd.Wuhan Iron & Steel Group Corp.Nanjing Iron & Steel Co., Ltd.