Oil & Gas
| Tue 07 May 2024
Beijing, May 8 -- Daqing Oilfield and PetroChina Co Ltd have received a patent for centering correction device for blowout prevention box. This invention was developed by Cong Ridong, Zhou Hengcang, Hu Shengjie, Liu Defeng, Zhao Jinhu, Wu Hongtao, Hu Yanjun, Tan Hongbin, Duan Baochang, Guo Yingjian and Zhang Jinyu.
The patent..