Pipe
| Wed 22 Apr 2026
Beijing, April 22 -- China Oilfield Services has sought patent for Electric Pump and Gas Lift Combined Lifting Separate Production Pipe Column. This invention was developed by Feng Rendong, Peng Zhengqiang, Han Fang, Hua Zejun, Huang Jie, Wang Weijun, Zhang Yunqiang, Guo Jing, Li Futang, Huang Wen'ao, Ikenobu, Liu Wei, Sun Huado..