US Patent Issued to Chongqing University of Science and Technology on Dec. 2 for "Method for quantitative evaluation of gas seal performance of annular blowout preventer" (Chinese Inventors)

ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,761, issued on Dec. 2, was assigned to Chongqing University of Science and Technology (Chongqing, China).

"Method for quantitative evaluation of gas seal performance of annular blowout preventer" was invented by Honglin Xu (Chongqing, China), Xing Yang (Chongqing, China), Hongfu Mi (Chongqing, China), Shilin Xiang (Chongqing, China), Nian Peng (Chongqing, China), Yufei Li (Chongqing, China), Shiguo Tang (Chongqing, China), Geng Tang (Chongqing, China), Xueyuan Long (Chongqing, China) and Bin Yang (Chongqing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for quantitative evaluation of gas seal performance of an annular blowout prevente...