公开(公告)号：US20180100352A1

公开(公告)日：2018-04-12

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

CPC classification number: E21B7/064 ,  E21B7/04 ,  E21B7/068 ,  E21B34/06

Abstract: Disclosed is a rotation guidance apparatus belonging to the technical field of oil drilling equipment. An end part of a lower connector (3) has a ball-socketed ball-joint rod (12), and a drill bit (1) is connected to the ball-socketed ball-joint rod (12); several circumferentially and evenly distributed piston holes are provided in a side wall of the lower connector (3), a piston matches each piston hole, and a piston rod (11) connected to the piston is movably connected to the ball-socketed ball-joint rod (12); and a eccentrically-placed valve core (17) is connected to a controller provided in an upper connector (4), a working face of the eccentrically-placed valve core (17) is opposite to the piston holes, and rotation of the eccentrically-placed valve core (17) makes the pistons in the piston holes move to control the rotation guidance of the ball-socketed ball-joint rod (12).