Oil & Gas
| Sat 13 Jun 2026
Beijing, June 13 -- PetroChina Co Limited has submitted a patent application for Fracturing Propping Agent Metering Device and Method. Li Chuan, Lu Hongjun, Qi Yin, Xue Xiaojia, Chen Wenbin, Zhang Yanjun, Shan Shumin, Lyu Changsheng, Yu Xingguo and Zhang Yangyang developed the invention.
The patent application number is CN202..