A rotary guiding device

Abstract

A rotary guiding device comprises a rotating shaft, the rotating shaft is used to drive a tool head to rotate, and the rotating shaft includes at least one steerable portion; a first non-rotating body and a second non-rotating body, the first non-rotating body and the second non-rotating body are substantially in a non-rotating state in a circumferential direction thereof relative to the rotating shaft when the rotating shaft drives the tool head to rotate; a guide driving mechanism, the guide driving mechanism is configured to connect the first non-rotating body and the second non-rotating body, the guide driving mechanism is adapted to generate a substantially axial driving force to change the relative direction between the first non-rotating body and the second non-rotating body, thereby changing the orientation of the tool head.

1 . A rotary guiding device, wherein comprising:
 a rotating shaft, the rotating shaft is used to drive a tool head to rotate, and the rotating shaft includes at least one steerable portion;   a first non-rotating body and a second non-rotating body, the first non-rotating body and the second non-rotating body are substantially in a non-rotating state in a circumferential direction thereof relative to the rotating shaft when the rotating shaft drives the tool head to rotate;   a guide driving mechanism, the guide driving mechanism is configured to connect the first non-rotating body and the second non-rotating body, the guide driving mechanism is adapted to generate a substantially axial driving force to change the relative direction between the first non-rotating body and the second non-rotating body, thereby changing the orientation of the tool head.   
     
     
         2 . The rotary guiding device of  claim 1 , wherein the steerable portion includes a universal transmission member or a flexible shaft. 
     
     
         3 . The rotary guiding device of  claim 1 , wherein the guide driving mechanism includes at least three hydraulic drive mechanisms which are evenly distributed in the circumferential direction. 
     
     
         4 . The rotary guiding device of  claim 1 , wherein the guide driving mechanism is further adapted to generate a substantially radial driving force to change the relative direction between the first non-rotating body and the second non-rotating body, thereby changing the orientation of the tool head. 
     
     
         5 . The rotary guiding device of  claim 4 , wherein the guide driving mechanism comprises at least three pushing members, each one of the pushing members is adapted to move in a radial direction of the rotating shaft to push against the wall of the well, thereby changing the orientation of the tool head. 
     
     
         6 . The rotary guiding device of  claim 5 , wherein the guide driving mechanism includes a first piston cylinder disposed in the first non-rotating body and a second piston cylinder disposed in the second non-rotating body, the first piston cylinder and the second piston cylinder are connected by a connecting rod, and the second piston cylinder is adapted to drive the pushing member to move. 
     
     
         7 . The rotary guiding device of  claim 6 , wherein the connecting rod is respectively hinged with the first piston cylinder and the second piston cylinder, one end of the second piston cylinder is connected to the connecting rod, and the other end of the second piston cylinder is connected to the pushing member. 
     
     
         8 . A hybrid rotary guiding device, the hybrid rotary guiding device, wherein comprising:
 a rotating shaft, the rotating shaft is used to drive a tool head to rotate, and the rotating shaft includes at least one steerable portion;   a first non-rotating body and a second non-rotating body, the first non-rotating body and the second non-rotating body are substantially in a non-rotating state in a circumferential direction thereof relative to the rotating shaft when the rotating shaft drives the tool head to rotate;   both inside of the first non-rotating body and the second non-rotating body are provided with piston cylinders; each one of the piston cylinder in the first non-rotating body and each one of the piston cylinder in the second non-rotating body are respectively hinged to both ends of a connecting rod; the piston cylinder disposed in the second non-rotating body is adapted to drive some pushing members to move between a first position and a second position, in the second position, the resultant force of the pushing members pushing against the well wall generates a first guiding force, and the resultant force of the connecting rods acting on the second non-rotating body generates a second guiding force.