Printing & Publishing
| Tue 11 Aug 2026
Beijing, Aug. 12 -- China National Petroleum has applied Chinese patent for Gas Well Swabbing, Liquid Discharging and Gas Production Method for Discharging Accumulated Liquid in Whole Shaft. Han Qiaorong, Chang Yongfeng, Liang Wanyin, Wang Zhiguo, Wang Xianwen, Zhou Shaowei, Lee Jae-soon, Wang Xiongxiong, Fan Lianlian, Wang Ge, ..