Security & Protection
| Fri 06 Mar 2026
Beijing, March 7 -- GD Power Dev Co Ltd and Guoneng Jinjie Energy Co Ltd have submitted a patent application for Safety Helmet for Downhole Operation. Dong Huadong, Feng Xuefeng, Yang Fenlin, Bai Zhijun, Lei Kaichun, Qiao Long, Zhou Haiping, Yang Yu, She Hailong, Xu Jie and Liu Jiwei developed the invention.
The patent applic..