Static push-the-bit rotary guiding device

Abstract

A static push-the-bit rotary guiding device includes: a mandrel having a central passage, wherein a circumferential groove is provided on an outer wall of the mandrel; a sleeve, which is sleeved in the circumferential groove and able to rotate independently; and a clutch, for cutting off or transferring a power from the mandrel to the sleeve. When it is unnecessary for the static push-the-bit rotary guiding device to provide a deviating force in a steady inclined section, a vertical section and a horizontal section, a rotational inertia and an interior energy storage of the rotary guiding device are not decreased, which is beneficial to highly-efficient and stable drilling of a downstream drill bit.

1 .- 10 . (canceled) 
     
     
         11 : A static push-the-bit rotary guiding device, comprising: a mandrel having a central passage, wherein a circumferential groove is provided on an outer wall of the mandrel; a sleeve, which is sleeved in the circumferential groove and able to rotate independently; and a clutch, for cutting off or transferring a power from the mandrel to the sleeve. 
     
     
         12 : The static push-the-bit rotary guiding device, as recited in  claim 11 , wherein the clutch comprises: a driving member and a driven member, which are arranged between the mandrel and the sleeve and for respectively actuating the mandrel and the sleeve to rotate; and a pushing unit, which is arranged in the sleeve and for actuating the driven member to separate from or connect with the driving member. 
     
     
         13 : The static push-the-bit rotary guiding device, as recited in  claim 12 , wherein the pushing unit comprises at least one linear motor or at least one clutch hydraulic cylinder which is able to be driven by a hydraulic power supply. 
     
     
         14 : The static push-the-bit rotary guiding device, as recited in  claim 13 , wherein the driving member and the driven member are two gears which mesh with each other, two splines which cooperate with each other, or two friction wheels which rub against each other. 
     
     
         15 : The static push-the-bit rotary guiding device, as recited in  claim 14 , wherein: the driven member is fixed outside an end of the sleeve through a piston rod of the clutch hydraulic cylinder in the sleeve, and the driving member is fixed to a side wall of the circumferential groove, so that the piston rod of the clutch hydraulic cylinder is able to actuate the driven member to separate from or connect with the driving member after a stretch movement. 
     
     
         16 : The static push-the-bit rotary guiding device, as recited in  claim 12 , wherein: a radial bearing is arranged between an inner wall of the sleeve and a bottom surface of the circumferential groove of the mandrel; two thrust bearings are respectively arranged between a left end of the sleeve and a left side wall of the circumferential groove, and between a right end of the sleeve and a right side wall of the circumferential groove; and both of the driving member and the driven member are located outside or inside a radial direction of the thrust bearings. 
     
     
         17 : The static push-the-bit rotary guiding device, as recited in  claim 13 , wherein: a radial bearing is arranged between an inner wall of the sleeve and a bottom surface of the circumferential groove of the mandrel; two thrust bearings are respectively arranged between a left end of the sleeve and a left side wall of the circumferential groove, and between a right end of the sleeve and a right side wall of the circumferential groove; and both of the driving member and the driven member are located outside or inside a radial direction of the thrust bearings. 
     
     
         18 : The static push-the-bit rotary guiding device, as recited in  claim 14 , wherein: a radial bearing is arranged between an inner wall of the sleeve and a bottom surface of the circumferential groove of the mandrel; two thrust bearings are respectively arranged between a left end of the sleeve and a left side wall of the circumferential groove, and between a right end of the sleeve and a right side wall of the circumferential groove; and both of the driving member and the driven member are located outside or inside a radial direction of the thrust bearings. 
     
     
         19 : The static push-the-bit rotary guiding device, as recited in  claim 15 , wherein: a radial bearing is arranged between an inner wall of the sleeve and a bottom surface of the circumferential groove of the mandrel; two thrust bearings are respectively arranged between a left end of the sleeve and a left side wall of the circumferential groove, and between a right end of the sleeve and a right side wall of the circumferential groove; and both of the driving member and the driven member are located outside or inside a radial direction of the thrust bearings. 
     
     
         20 : The static push-the-bit rotary guiding device, as recited in  claim 13 , wherein the static push-the-bit rotary guiding device further comprises: a biasing guiding mechanism, for providing a lateral force; a measurement and control mechanism for controlling the biasing guiding mechanism and the clutch; and a power supply mechanism for providing an electric power. 
     
     
         21 : The static push-the-bit rotary guiding device, as recited in  claim 15 , wherein the static push-the-bit rotary guiding device further comprises: a biasing guiding mechanism, for providing a lateral force; a measurement and control mechanism for controlling the biasing guiding mechanism and the clutch; and a power supply mechanism for providing an electric power. 
     
     
         22 : The static push-the-bit rotary guiding device, as recited in  claim 19 , wherein the static push-the-bit rotary guiding device further comprises: a biasing guiding mechanism, for providing a lateral force; a measurement and control mechanism for controlling the biasing guiding mechanism and the clutch; and a power supply mechanism for providing an electric power. 
     
     
         23 : The static push-the-bit rotary guiding device, as recited in  claim 20 , wherein: the biasing guiding mechanism comprises multiple swing ribs which are circumferentially arranged in an outer wall of the sleeve with an interval, for providing the required lateral force when guiding. 
     
     
         24 : The static push-the-bit rotary guiding device, as recited in  claim 21 , wherein: the biasing guiding mechanism comprises multiple swing ribs which are circumferentially arranged in an outer wall of the sleeve with an interval, for providing the required lateral force when guiding. 
     
     
         25 : The static push-the-bit rotary guiding device, as recited in  claim 22 , wherein: the biasing guiding mechanism comprises multiple swing ribs which are circumferentially arranged in an outer wall of the sleeve with an interval, for providing the required lateral force when guiding. 
     
     
         26 : The static push-the-bit rotary guiding device, as recited in  claim 23 , wherein: the biasing guiding mechanism further comprises a rib hydraulic cylinder, which is able to be driven by the hydraulic power supply and actuate swing ribs to swing. 
     
     
         27 : The static push-the-bit rotary guiding device, as recited in  claim 24 , wherein: the biasing guiding mechanism further comprises a rib hydraulic cylinder, which is able to be driven by the hydraulic power supply and actuate swing ribs to swing. 
     
     
         28 : The static push-the-bit rotary guiding device, as recited in  claim 25 , wherein: the biasing guiding mechanism further comprises a rib hydraulic cylinder, which is able to be driven by the hydraulic power supply and actuate swing ribs to swing. 
     
     
         29 : The static push-the-bit rotary guiding device, as recited in  claim 26 , wherein the measurement and control mechanism comprises: a rib control unit which is connected between the hydraulic power supply and the rib hydraulic cylinder; a clutch control unit which is connected between the hydraulic power supply and the clutch hydraulic cylinder; a first pressure sensor for measuring a pressure of a fluid in the clutch hydraulic cylinder; and a second pressure sensor for measuring a pressure of a fluid in the rib hydraulic cylinder. 
     
     
         30 : The static push-the-bit rotary guiding device, as recited in  claim 28 , wherein the measurement and control mechanism comprises: a rib control unit which is connected between the hydraulic power supply and the rib hydraulic cylinder; a clutch control unit which is connected between the hydraulic power supply and the clutch hydraulic cylinder; a first pressure sensor for measuring a pressure of a fluid in the clutch hydraulic cylinder; and a second pressure sensor for measuring a pressure of a fluid in the rib hydraulic cylinder.