ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,569, issued on Oct. 7, was assigned to SOUTHWEST PETROLEUM UNIVERSITY (Chengdu, China), NANTONG XIEMING TECHNOLOGY Co. LTD. (Nantong, China) and SICHUAN XIEMING TECHNOLOGY Co. LTD. (Chengdu, China).

"Directional well hydraulic clutch drill string full rotation controller" was invented by Jialin Tian (Chengdu, China), Lei Cha (Chengdu, China), Lin Teng (Chengdu, China) and Lanhui Mao (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure is in the technical field of oil drilling, and in particular relates to a directional well hydraulic clutch drill string full rotation controller, including a rotary assembly, a power assembly a...