US Patent Issued to CNPC USA, Beijing Huamei, China National Petroleum on Oct. 7 for "Hydraulic control apparatus and method for a downhole tool" (Chinese, American Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,585, issued on Oct. 7, was assigned to CNPC USA Corp. (Houston), Beijing Huamei Inc. (Beijing) and China National Petroleum Corp. (Beijing).

"Hydraulic control apparatus and method for a downhole tool" was invented by Jinjun Wang (Houston), Chris Cheng (Houston), Jiaqing Yu (Houston), Hems Mada (Houston), Kevin Waddell (Houston), Xiongwen Yang (Beijing), Xu Zhao (Beijing), Ming Yi (Beijing), Xin Zhang (Beijing), Yanping Zhang (Beijing), Yong Luo (Beijing), Fuxiang Hou (Beijing) and Tito Zabala (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention is a hydraulic control apparatus that activates and deactivates a downhole tool, ...