公开(公告)号：US10233694B2

公开(公告)日：2019-03-19

申请号：US15323104

申请日：2015-06-23

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Wei Li ,  Hongxiang Lei ,  Qingyou Liu ,  Shihong Xiao ,  Xu Si ,  Tieshan Zhang ,  Qing Tu ,  Xiao Tan ,  Fanyao Jin ,  Xingming Wang ,  Yuan Zhong ,  Hang Li ,  Jianchuan Wu ,  Dengwei Li

IPC: E21B7/06 ,  E21B7/04 ,  E21B34/06

Abstract: A rotation guidance apparatus belonging to the technical field of oil drilling equipment. An end part of a lower connector has a ball-socketed ball-joint rod, and a drill bit is connected to the ball-socketed ball-joint rod. Several circumferentially and evenly distributed piston holes are provided in a side wall of the lower connector, wherein a piston matches each piston hole and a piston rod connected to the piston is movably connected to the ball-socketed ball-joint rod. An eccentrically-placed valve core is connected to a controller provided in an upper connector, wherein a working face of the eccentrically-placed valve core is opposite to the piston holes and rotation of the eccentrically-placed valve core makes the pistons in the piston holes move to control the rotation guidance of the ball-socketed ball-joint rod.