Oil & Gas
| Thu 23 Apr 2026
Beijing, April 24 -- PetroChina has sought patent for Sand-filled Model Compacting Device and Compacting Method. This invention was developed by Chen Chao, Wen Haixia, Zhang Lidong, Li Xiaohui, Zhang Jianhua, Zhou Xiaosong, Ding Guoqing, Wang Peng, Li Qian, Guo Feifei, Liu Yong, Liu Xiaojun, Song Liangye, Zhang Jun, Huang Peng, ..