Tools and Machinery
| Tue 31 Mar 2026
Beijing, March 31 -- CNOOC Energy Technology & Services has filed a patent application for Low-torque Reamer While Drilling. This invention was developed by Zhao Jincheng, Wang Pan, Guan Yanlei, Sun Xiaofeng, Li Yaning, Zhu Guoning, Ji Guangqi, Ren Zhiwei, Feng Yuekai, Cai Yugui, Liu Xiaojun and Li Shilei.
The patent applicat..