Tools and Machinery
| Fri 24 Jul 2026
Beijing, July 24 -- CNPC Greatwall Drilling and China National Petroleum have sought patent for Coring Drilling Equipment. This invention was developed by Zhang Zengqiang, Su Yang, Xie Mengyu, Dong Chenchen, Sun Shaoliang, Wang Kewei, Shi Lin, Lu Yuzhou, Liu Haohong, Xu Weishou, Ping Shanhai, Peng Huixin, Dang Yufeng, Jiao Yang,..