| Daqing Harvest Longwall High Pressure FRP Pipe Co., Ltd. | Jiangsu Yaxing Anchor Chain Co., Ltd |
| Baoda Tubular Goods Producing Ltd., Co. | Baogang Group Shanghai Steel Pipe Co., Ltd |
| Shanghai Baoshun Steel Tube Co., Ltd. | Wuxi Seamless Steel Pipe Co.,Ltd |
| Suzhou Friend Tubing and Casing Pipe Co., Ltd. | Shanghai Baofu Steel Tube Co.,Ltd |
| Shanghai Hongshun Tube Manufacturing Co., Ltd | Shanghai Fanzhengrong Steel Pipe Co.,Ltd |
| Wuhan Wugang Group Hanyang Steel Factory | Tonghua Iron & Steel (Group) Panshi Seamless Steel Tube Co., Ltd |
| Shanghai Yuezhou Steel Pipe Co., Ltd | Benxi Northern Steel Pipe Co. Ltd. |
| Wuxi Seamless Steel Pipe Co.,Ltd | Daqing Yilang Site Petroleum Special Pipe Co., Ltd. |
| Zhejiang Weiqixin Oil and Mechanical Co., Ltd. | Wuxi Seamless Steel Pipe Co.,Ltd |
| Jiangyin City Seamless Steel Tube Factory | Hebei Zhongyuan Steel Pipe Manufacturing Co., Ltd. |
| Wuxi Zhenda Special Steel Tube Manufacturing Co., Ltd | Changzhou Darun Steel Tube Co., Ltd. |
| Shanghai Yueyuechao Manufacture Tube Co., Ltd | Jiangsu Huashun Steel Pipe Co., Ltd. |
| Jiangyin Jieda Shaped Tube Co., Ltd. | Suzhou Seamless Steel Tube Works |
| Wuxi Dexin Steel Pipe Co., Ltd. | Cangzhou Xinyida Steel Pipe Co., Ltd. |
| Ningbo Jun-Cheng Metal Pipe Co., Ltd | Zhejiang Xinda Electric Power Steel Tube Co., Ltd |
| Zhejiang Baolong Valve Manufacturing Co.,Ltd | Yancheng Jigao Petroleum Machinery Co., Ltd. |
| Nantong High & Medium Pressure Valve Co., Ltd | Shanghai Lixing Valve Manufacture Factory |
| Boteli Valve Group Co., Ltd. | Nanjing Enport Valve Manufacture Co., Ltd |
| Shanghai JF Petroleum Machinery Co., Ltd. | Zhejiang Wuzhou Valve Co.,Ltd |
| Boteli Valve Group Co., Ltd. | Frvalve (Suzhou) Corp. Ltd. |
| Shanghai Valve factory | Shuangda Valve Co., LTD |
| Shanghai Zhengfeng Valve Co., Ltd | Zhejiang Ouqiu Valve Co.,Ltd |
| Yancheng Dianzhan Valve factory | Shanghai Koko Valve Co., Ltd. |
| Kaifeng Ruifa High & Middle Pressure Valve Factory | Nanjing Enport Valve Manufacture Co., Ltd |
| Jianhu East Valve Manufacturing Co., Ltd. | Suzhou Industrial Park Stard Valve Co., Ltd. |
| Wuhan Boiler Group Valve Co., Ltd | Shanghai Kaigong Valve Co.,Ltd |
| Shanghai Mecco Valve Co., Ltd | Shanghai Far East High & Medium Pressure Valve Co., Ltd. |
| Hubei High & Middle Pressure Valve Co., Ltd | Sichuan Saier Valve MFG Co., Ltd |
| Tianjin Tiansheng Petroleum Pipe Manufacturing Co. | Liaoning Zhonghe Science and technology Industry Co.,Ltd |
| Jiangsu Province Changzhou Global Valve Plant | Ningbo Xinsheng Valve Co.,Ltd |
| Shanghai (Jinji Group) Jinji Valve Piping Mfg. Co., Ltd. | Henan Gaoshan Valve Co., Ltd. |
| Zhejiang Jingjia Valve Co., Ltd. | Shoulong metals Foundry Co.,Ltd |
| Henan Kaifeng High Pressure Valve Co., Ltd. | China Hebei Canghai Pipe Fitting Group Co. Ltd |
| Mudanjiang Universal Downhole Tools Dier Factory | Mudanjiang Hongda Petroleum Tools Co., Ltd |
| Northwest General Rubber Factory | Shanghai Weilun Machinery Co., Ltd. |
| Shengli Oil Field Highland Petroleum Equipment Co., Ltd. | Tianjin Pengzhan Steel Pipes Co., Ltd. |
| Jiangsu Xinxiang Petroleum Machinery Co., Ltd | Jiangsu Xinxiang Share Co., Ltd. |
| Jiangsu Huaneng Cable Co., Ltd. | Jiangsu Shenwang Metal Products Co., Ltd |
| Angang Group Steel Wire Rope Co.,Ltd | Jiangsu Fasten Co., Ltd |
| Baotou Liande Oil and Mechanical Co., Ltd. | Ruian Jusheng Machinery Co., Ltd. |
| Shandong Laizhou Meizhong Machinery Co.,Ltd | Zhejiang Weiqixin Oil and Mechanical Co., Ltd. |
| MSP/Drilex | Shengli Oil Field Highland Drill Tool Co., Ltd. |
| Drilling Technology Research Institute, Shengli Petroleum Administrative Bureau, SINOPEC | Zhejiang Weiqixin Oil and Mechanical Co., Ltd. |
| Lianyungang Zhongfu Lianzhong Composites Group Co., Ltd | Shengli Oilfield Supply Fangyuan Petroleum Facility Co., Ltd. |
| Yancheng Jigao Petroleum Machinery Co., Ltd | Shanghai JF Petroleum Machinery Co., Ltd |
| Wuxi Zhenda Special Steel Tube Manufacturing Co., Ltd | Jiangsu Yaxing Anchor Chain Co., Ltd |
| Zhejiang Ouqiu Valve Co.,Ltd | Jinan Magang Steel Pipe Manufacturing Co., Ltd. |
| Yingkou Double Dragon Petroleum Equipment Co., Ltd. | Dafeng Anfei Cast Steel Factory |
| Wuxi Zhenda Special Steel Tube Manufacturing Co., Ltd | Hubei Hongcheng General Machinery Co., Ltd |
| China Hebei Canghai Pipe Fitting Group Co. Ltd. | Wuxi Xuelang Steel Group Co., Ltd |
