Tools and Machinery
| Sun 15 Nov 2026
Alexandria, Nov. 14 -- CNPC Greatwall Drilling Co and China National Petroleum have received a patent for Pressure-preserved Coring Tool, Use Method, and Reservoir Analysis Method. This invention was developed by Su Yang, Zhou Shangwen, Jiao Yang, Dong Chenchen, Wen Li, Xia Boyi, Xie Mengyu, Sun Shaoliang, Luo Jun, Wang Ren, Dua..