Pipe
| Mon 29 Jun 2026
Beijing, June 29 -- Offshore Oil Engineering has submitted a patent application for Safety Device for Operation on Upper Portion of Pipe. This invention was developed by Yan Shujun, Yu Lifeng, Ji Anguo, Xie Zeming, Su Jianxin, Fan Zhiyong, Wang Qian, He Fengshan, Li Sen and Shen Lanwei.
The patent application number is CN202511..