公开(公告)号：US11773673B2

公开(公告)日：2023-10-03

申请号：US17309239

申请日：2018-11-12

Applicant: SHENZHEN UNIVERSITY ,  SICHUAN UNIVERSITY

Inventor： Heping Xie ,  Mingzhong Gao ,  Ling Chen ,  Zhilong Zhang ,  Jun Guo ,  Zetian Zhang ,  Ru Zhang ,  Yiqiang Lu ,  Cong Li ,  Zhiqiang He

IPC: E21B25/02 ,  E21B23/04 ,  E21B4/02 ,  E21B4/18 ,  E21B10/02 ,  E21B10/26 ,  E21B21/10 ,  E21B25/00

CPC classification number: E21B23/0418 ,  E21B4/02 ,  E21B4/18 ,  E21B10/02 ,  E21B10/26 ,  E21B21/10 ,  E21B25/00

Abstract: A coring drill tool driving structure has a driving motor (7), an outer cylinder (23) and a coring drill tool (8). The driving motor comprises an outer rotor (73) and an inner stator (75), the inner wall of the outer rotor and the outer wall of the inner stator are provided with ribs (77) mutually matched, the outer rotor and inner stator are in clearance fit, the clearance between the outer rotor and the inner stator is a driving liquid flow path (74), the outer rotor length is smaller than the inner stator length, the outer rotor is located between front and rear ends of the inner stator, the outer rotor is connected to the outer cylinder, a front end of the outer cylinder is connected to the coring drill tool, and a rear end of the inner stator is connected to a coupling (76).