US Patent Issued to China National Petroleum, CNPC Engineering Technology R&D on Oct. 21 for "Mud pressure wave signal modulation apparatus and method" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,885, issued on Oct. 21, was assigned to China National Petroleum Corp. (Beijing) and CNPC Engineering Technology R&D Co. Ltd. (Beijing).

"Mud pressure wave signal modulation apparatus and method" was invented by Jiajin Wang (Beijing), Weimin Mao (Beijing), Weiping Ai (Beijing), Yifeng Fan (Beijing), Xiurong Dou (Beijing), Hengtian Jia (Beijing), Peng Wang (Beijing), Zhigang Wei (Beijing), Lei Wang (Beijing) and Xianwei Guo (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a mud pressure wave signal modulation apparatus and method, which relate to the technical field of petroleum drilling engineering. The appara...