Oil & Gas
| Sat 27 Jun 2026
Beijing, June 27 -- Petrochina Co Limited and Changqing Eng Design Co Ltd have sought patent for Method for Extracting Lithium from Oil and Gas Field Produced Water. This invention was developed by Lu Feng, Shan Qiaoli, Yang Tao, Zhu Guocheng, Li Yanfang, Liu Jing, Zha Guangping, Zhang Fan, Zhang Qiaosheng, Bai Hongsheng, Xu Jun..