US Patent Issued to CCTEG Chongqing Research Institute on Dec. 30 for "Combined drilling system with double rotary driving devices and control method therefor" (Chinese Inventors)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,943, issued on Dec. 30, was assigned to CCTEG Chongqing Research Institute Co. Ltd. (Chongqing, China).

"Combined drilling system with double rotary driving devices and control method therefor" was invented by Hang Chen (ChongQing, China), Dezhong Xin (ChongQing, China), Jun Wan (ChongQing, China), Lin Yang (ChongQing, China), Xiaohua Liu (ChongQing, China), Yuqing Xiao (ChongQing, China), Jian Pu (ChongQing, China), Shizhai Zhang (ChongQing, China), Min Tang (ChongQing, China), Jinjun Lv (ChongQing, China), Zhengang Ma (ChongQing, China), Yuan Wan (ChongQing, China), Xin Dou (ChongQing, China), Fujia Zhou (ChongQing, China), Xing Wang (ChongQing, China), Shiping Lu (ChongQing, Ch...