US Patent Issued to CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) on June 17 for "Well-killing system for ultra-deep well drilling with co-existence of overflow and lost circulation and operation method thereof" (Chinese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,602, issued on June 17, was assigned to CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) (Dongying, China).

"Well-killing system for ultra-deep well drilling with co-existence of overflow and lost circulation and operation method thereof" was invented by Bangtang Yin (Dongying, China), Kai Feng (Dongying, China), Baojiang Sun (Dongying, China), Zhiyuan Wang (Dongying, China), Yonghai Gao (Dongying, China), Hao Li (Dongying, China), Jianbo Zhang (Dongying, China) and Guizhen Xin (Dongying, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A well-killing system for ultra-deep well drilling with co-existence of overflow and lost circulation is provided. A...