US Patent Issued to China National Petroleum, CNPC Engineering Technology R&D on Aug. 19 for "Cement slurry system, preparation method therefor and use thereof" (Chinese Inventors)

ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,861, issued on Aug. 19, was assigned to China National Petroleum Corp. (Beijing) and CNPC Engineering Technology R&D Co. Ltd. (Beijing).

"Cement slurry system, preparation method therefor and use thereof" was invented by Jianzhou Jin (Beijing), Yuchao Guo (Beijing), Hong Yue (Chengdu, China), Youcheng Zheng (Chengdu, China), Hua Zhang (Beijing), Lili Chen (Chengdu, China), Shuoqiong Liu (Beijing), Wei Li (Chengdu, China), Yong Ma (Chengdu, China), Feng Zhou (Chengdu, China), Chengquan Li (Chengdu, China), Yao Wang (Chengdu, China), Yongjin Yu (Beijing), Congfeng Qu (Beijing), Fengzhong Qi (Beijing), Yong Li (Beijing), Youzhi Zheng (Chengdu, China), Jianhua Guo (Chengdu, China), Mi...