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Daqing Honggang Drilling Tool Factory
Daqing Petroleum Equipment Group
Daqing Rijiu Centralizer Plant
Deyang Huadi Petroleum Equipment Co., Ltd.
Drilling & Production Equipment Plant of Sichuan Petroleum Administration
Drilling Engineering Technology Research Institute of Daqing Petroleum Administration Bureau
Drilling Technology Research Institute, Shengli Petroleum Administrative Bureau, SINOPEC
Drilling Tool Sub-company of Daqing Drilling Technology Services Company
Enflow Industries Inc.
Fenghua City High-Middle Pressure Valves Manufacture Co., Ltd.
Fenghua Hengtong Valves Co. Ltd
Fujian Sanming High & Middle Pressure Valve Factory
Fushun Cement Co. Ltd.
Gaoyou Huaxing Petroleum Manufacturing Co., Ltd.
General Machinery Plant of Shengli Petroleum Administration
Gezhouba Holding Company Cement Plant
Great Valve Manufacturing Co., Ltd.
Guanghan Petroleum Well-Control Equipment Co., Ltd.
Guangzhou Panyu District Dongsu Machinery Co., Ltd.
GuiZhou GaoFeng Machinery Factory
Guizhou Wire Rope Incorporated Company
Hangzhou Donghua Chain General Factory
Hebei Cangzhou Hengtong Tubing Co. Ltd
Heibei Zhongyuan Steel Pipe Manufacture Co., Ltd.
Heilongjiang North Shuangjia Drilling Tools Co., Ltd.
Henan Gaoshan Valve Co., Ltd.
Henan Petroleum Exploration Bureau Machinery Plant
Henan Shangdie Valve Co., Ltd.
Henan Zhongyuan Special Steel Works
Henan Zyzj Petroleum Equipment Co., Ltd.
Hubei Fuxing Science and Technology Co., Ltd.
Hunan Hengyang Steel Tube (Group) Co. Ltd.
Inner Mongolia No. 1 Machinery (Group) Co., Ltd.
Integrated Equipment, Inc.
Jiang Yin Eastern Valve Company, Ltd.
Jianghan Petroleum Machinery Plant
Jiangsu Chang-Bao Steel Tube Limited Co.
Jiangsu Chengde Steel Tube Share Co. Ltd.
Jiangsu Huaneng Cable Co., Ltd.
Jiangsu Jin Shi Machinery Group Co., Ltd.
Jiangsu Rudong General Machinery Company Limited
Jiangsu Rushi Machinery Co. Ltd
Jiangsu Shuguang Drilling Tool Co., LTD.
Jiangsu Shuguang Grant Prideco Tubular Co., Ltd.
Jiangsu Suyan Valve & Pipe Plant
Jiangsu Xianzhong Petroleum Machinery Co., Ltd.
Jiangsu Xinxiang Share Co., Ltd.
Jiangsu Yulong Steel Pipe Co., Ltd.
Jiangyin Chuangxin Oil Pipe Company Ltd.
Jiangyin Xingcheng Special Steel Works Co., Ltd.
Jianhu County Hongda Valve & Pipe Co., Ltd.
Jingbo Petroleum Machinery Plant
Jinxi Steel Pipe Co. Ltd of Lingyuan Iron and Steel Group
Jiyuan Petroleum Machinery Co., Ltd
Ju Long Steel Pipe Co. Ltd.
JUN Valve (Kunshan) Co., Ltd.
KF Industries, Inc.
Kingdom Precision Casting Co., Ltd.
KingDream Public Limited Company
KingDream Public Ltd Company Shanghai Branch
KTM Ball Valve Manufacturing (Sichuan) Co., Ltd.
Kunshan AB Valve Co. Ltd.
Kunshan Valve Co., Ltd.
Lanzhou General Machinery Plant
Lanzhou High Pressure Valve Limited Company
Lanzhou LS-National Oilwell Petroleum Engineering Company Limited
Lanzhou Petroleum & Chemical Machinery Works
Lianyungang Ocean Liquid Loading & Unloading Machine Co., Ltd.
Liaohe Oilfield General Machine Factory
Liaoning Dongyu Oil Pipe Manufacturing Co., Ltd.
Liaoning Jinxi (ASP) Steel Pipe Co. Ltd.
Liaoyang Spiral and Straight Seam Steel Tube Factory
Liaoyang Steel Tube Co., Ltd.
Liaoyang Xingde Large Steel Pipe Plant
Machinery Factory of Jilin Petroleum Group Co., Ltd.
Machinery Factory of Tuha Petroleum Exploration and Development Corporation
Machinery Factory of Tuha Petroleum Exploration and Development Corporation
MSP/Drilex
Mudanjiang City Oriental Diamond Bits Co., Ltd.
Mudanjiang Construction Material Petroleum Machinery Plant
Mudanjiang Petroleum Machinery Co., Ltd.
Mudanjiang Petroleum Tools Co., Ltd.
Mudanjiang Zhongyuan Drilling Co., Ltd.
Nanjing Luzhou Machine Works
Nantong Colves Fluid Control Co., Ltd.
Nantong High & Medium Pressure Valve Factory
Nantong Wire Rope (Group) Co., Ltd.
Nanyang Petroleum Machine Plant
Neway Valve (Suzhou) Co., Ltd.
Ningbo Mayer Steel Pipe Ltd.
Ningbo Sanding Steel Pipe Engineering Co., Ltd.
Ningxia Hengli Steel Wire Rope Co., Ltd.
Norms Engineering Co., Ltd.
North China Petroleum Steel Pipe Co. Ltd.
Northern Steel Pipe Co., Ltd.
Offshore Oil Engineering Co., Ltd.
Oil Well Cement Development Company, Zibo Zhongchang Special Cement Co, Ltd
Outong Group Co., Ltd. (Zhejiang Petrochemistry Valve Co., Ltd.)
P.T. Kvaerner Oilfield Products
Pangang Group Beihai Steel Pipe Corporation
Pangang Group Chengdu Iron & Steel Co., Ltd.
Panyu Chukong Steel Pipe Co., Ltd.
Power Machinery Works of Shengli Petroleum Administration
Precision Pipe Manufacturing Branch of Liaoning Tianyi Industry Co. Ltd.
Puyang City Shuangfa Industry Co., Ltd.
Puyang Zhongshi Group Co., Ltd.
Rongsheng Machinery Manufacture Ltd of Huabei Oilfield, Hebei
Sanmenxia Xinghe Petroleum Equipment Manufacture Co., Ltd.
Seamless Pipe Plant of Angang New Iron & Steel Co., Ltd., Angang Group Co.
Seamless Tube Mill of Baotou Steel Union Co., Ltd.
Shandong Huayin Special Cement Co. Ltd.
Shandong Longkou Special Rubber Hose Co., Ltd.
Shandong Molong Petroleum Machinery Co., Ltd.
Shanghai KVC Valve Co., Ltd.
Shanghai (Jinji Group) Jinji Valve Piping Mfg. Co., Ltd.
Shanghai Alison Steel Pipe Co., Ltd.
Shanghai Dalong Chains Works
Shanghai Fudi Valve Co., Ltd.
Shanghai Gaoneng High Pressure Valve Factory
Shanghai Huatong Valve Co., Ltd.
Shanghai Jinlun Mechanical Industry Co., Ltd.
Shanghai Kai-gong Valve Co., Ltd.
Shanghai Koko Valve Co., Ltd.
Shanghai Liang Gong Valve Factory
Shanghai Lixing Valve Manufacture Factory
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