Multi-point support for wellbore posture control and high deflection directional drilling tool

Abstract

The present invention discloses a high-inclination guide drilling tool for controlling the posture of the wellbore with multiple supporting points, and belongs to the technical field of oil drilling equipment. The high-inclination guide drilling tool for controlling the posture of the wellbore with multiple supporting points includes a drill pipe, a core shaft and a drill bit, and also includes: an upper supporting mechanism, which can abut against the wellbore wall to apply a force along the radial direction of the core shaft to the shell assembly; a lower supporting mechanism, which can abut against the wellbore wall to apply a force along the radial direction of the core shaft to the shell assembly; a hydraulic control circuit, which is used to supply hydraulic oil to the upper supporting mechanism and the lower supporting mechanism, so that the directions of the forces applied to the wellbore by the upper supporting mechanism and the lower supporting mechanism are opposite. The high-inclination guide drilling tool for controlling the posture of the wellbore with multiple supporting points of the present invention can make the wellbore wall apply supporting forces in opposite directions to both ends of the shell assembly at the same time, thereby improving the inclination capability of the entire drilling tool, so as to carry out short radius and ultra-short radius large curvature inclination and directional horizontal drilling.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling equipment, and in particular to a multi-support point supported well wall posture controlled high-inclination guide drilling tool. Background Art

[0002] With the deepening of the development of old oil fields, the water content of oil fields has gradually increased, the crude oil production has gradually decreased, and the development situation has become more severe. In addition, with the continuous construction of infill wells, the distance between wells has become shorter and shorter. Under the constraints of long deflection sections and short well spacing in conventional horizontal wells, the short horizontal section affects the oil production effect. For this reason, in recent years, short-radius and ultra-short-radius horizontal well technologies have been used to carry out large-curvature deflection and directional horizontal drilling, which can achieve directional potential tapping and transformation of the target layer, expand the oil leakage area, improve the production conditions of oil wells, and further improve the crude oil recovery rate. Compared with conventional horizontal wells, it has the characteristics of short target front distance, short construction period, and low cost. It requires a high deflection rate (more than 60° / 30m) and a small curvature radius (within 50m), which causes great difficulties for on-site construction. In particular, the directional section has higher requirements for deflection tools, requiring smaller size, larger deflection rate, and higher power deflection tools. Conventional bent screws are used for directional drilling, and the bending angles are mostly 0.75°, 1°, 1.25°, 1.5°, 1.75°, etc., and the highest can reach 16° / 30m; rotary steering is used for directional drilling. Currently, various rotary steering tools such as push-on-well wall type, push-on-mandrel pointing type, and hybrid type have a slope rate of 6°-15° / 30m;

[0003] Conventional rotary steerable drilling tools are mostly single-pivot type, which only have multiple supporting blades evenly distributed along the circumference of the drilling tool near the drill bit. The different sizes of supporting forces generated by each supporting blade and the combined force formed by the multiple supporting blades can apply a deflecting force to the entire steerable drilling tool. The deflecting ability of the steerable drilling tool is improved by increasing the supporting force applied to the steerable drilling tool by several of the supporting blades. However, the ability of the single-pivot type steerable drilling tool to increase the deflecting force is limited, which limits the deflecting ability of the steerable tool. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems in the prior art and to provide a high-inclination guiding drill bit with multi-point support for well wall posture control, which can improve the inclination capacity of the entire drill bit to carry out short-radius and ultra-short-radius large-curvature inclination and directional horizontal drilling, thereby realizing directional potential tapping and transformation of the target layer.

[0005] The present invention provides a multi-support point support well wall posture control high deflection guide drilling tool, comprising a drill pipe, a mandrel and a drill bit, wherein the drill bit is connected to the drill pipe through the mandrel, and further comprising:

[0006] The housing assembly is sleeved on the outer side of the mandrel near one end of the drill bit, and the housing assembly is pivotally connected to the outer wall of the mandrel;

[0007] An upper support mechanism is arranged at an end of the housing assembly away from the drill bit, and the upper support mechanism can abut against the well wall;

[0008] A lower support mechanism is arranged at one end of the housing assembly close to the drill bit, and the lower support mechanism can abut against the well wall;

[0009] A hydraulic control circuit is connected to the upper support mechanism and the lower support mechanism, and the hydraulic control circuit is used to control the actions of the upper support mechanism and the lower support mechanism so that the force applied by the upper support mechanism to the shell assembly is opposite in direction to the force applied by the lower support mechanism to the shell assembly.

[0010] Preferably, the upper support mechanism and the lower support mechanism have the same structure and both include a plurality of hydraulic cylinders, wherein the plurality of hydraulic cylinders are evenly distributed on the side wall of the shell assembly along the circumference of the shell assembly, each hydraulic cylinder is connected to a control valve, each control valve is connected to the hydraulic control circuit, and a support wing is connected to the hydraulic piston of each hydraulic cylinder. When the control valve is opened, the hydraulic control circuit allows hydraulic oil to flow into the hydraulic cylinder, and the hydraulic piston drives the support wing to move radially along the core shaft, so that the support wing applies extrusion force to the well wall.

[0011] Preferably, the hydraulic control circuit includes a plunger pump, a high-pressure oil chamber and a hydraulic power mechanism, the hydraulic power mechanism is connected to a drilling fluid supply device, the plunger pump is connected to the output end of the hydraulic power mechanism, the high-pressure oil chamber is connected to the plunger pump, and each control valve is connected to the high-pressure oil chamber. When the drilling fluid supply device supplies drilling fluid to the hydraulic power mechanism, the hydraulic power mechanism drives the plunger pump to move to pass high-pressure hydraulic oil into the high-pressure oil chamber.

[0012] Preferably, the plunger pump includes a rotating shaft, a swash plate and a plurality of plunger cylinders, the hydraulic mechanism is connected to the rotating shaft, a first through hole is provided in the core shaft, the rotating shaft is pivotally connected to the first through hole and is arranged concentrically with the core shaft, a plurality of plunger cylinders are arranged along the circumference of the core shaft, the cylinder body of each plunger cylinder is connected to the rotating shaft, the axial direction of the cylinder body of each plunger cylinder is parallel to the axial direction of the core shaft, the swash plate is fixedly connected to the inner wall of the core shaft, the swash plate is provided with a working surface which is at an acute angle to the axial direction of the core shaft, and the working surface abuts against the plunger of the plunger cylinder.

[0013] Preferably, the hydraulic power mechanism includes a hydraulic pump, a turbine stator and a turbine rotor, the turbine stator is arranged on the inner wall of the first through hole, the turbine rotor is arranged on the rotating shaft, the input end of the hydraulic pump is connected to the drilling fluid supply device, and the first through hole is connected to the output end of the hydraulic pump. When the drilling fluid flows through the first through hole, the drilling fluid drives the turbine rotor to rotate.

[0014] Preferably, the turbine rotor is arranged in the middle of the rotating shaft, a second through hole is arranged on the core shaft near one end of the drill bit, a liquid injection port is arranged on the drill bit, and the liquid injection port is connected with the first through hole through the second through hole.

[0015] Preferably, the support wing is a trapezoidal block structure, the small end surface of the support wing abuts against the well wall, and the length direction of the support wing is in the same direction as the length direction of the core shaft.

[0016] Preferably, an upper joint is provided at the upper end of the core shaft, and the upper joint is detachably connected to the drill rod. A lower joint is provided at the lower end of the core shaft, and the lower joint is detachably connected to the drill bit.

[0017] Preferably, the core shaft is pivotally connected to the housing assembly via a bearing assembly.

[0018] Preferably, the rotating shaft is pivotally connected to the first through hole via a high-speed bearing.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: a multi-point supported well wall attitude controlled high-inclination guide drilling tool of the present invention controls the movement of the upper support mechanism and the lower support mechanism through a hydraulic control circuit until the upper support mechanism and the lower support mechanism abut against the well wall, the upper support mechanism and the lower support mechanism are respectively supported on the well walls on both sides of the shell assembly, the directions of the forces applied to the well wall by the upper support mechanism and the lower support mechanism are opposite, and the upper support mechanism and the lower support mechanism are respectively arranged at the front and rear ends of the shell assembly, the supporting force applied by the well wall to the two ends of the shell assembly causes the shell assembly to form a certain torque, thereby causing the shell assembly to deflect to a certain extent, thereby driving the drill bit to deflect, so that the entire drilling tool has a higher inclination ability, so as to carry out short radius and ultra-short radius large curvature inclination and directional horizontal drilling, thereby realizing directional potential tapping and transformation of the target layer.

[0020] The upper support mechanism and the lower support mechanism of the drilling tool use the support wings on both sides to apply a stable extrusion force to the well wall. Under the support of the well wall, a stable support force in opposite directions can be simultaneously applied to both ends of the shell assembly to improve the deflection ability of the entire drilling tool. Through multiple plunger cylinders, the support wings on both sides of the mandrel axis can be driven to move at the same time, thereby driving the drill bit to deflect to one side. By controlling different plunger cylinder movements, the support wings in different directions can be controlled, thereby controlling the deflection direction of the drill bit to achieve directional potential tapping and transformation of the target layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the plunger pump of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the lower supporting structure of the present invention.

[0025] Description of reference numerals:

[0026] 101. Mandrel, 102. Housing assembly, 103. Upper support mechanism, 104. Lower support mechanism, 201. Hydraulic cylinder, 202. Hydraulic piston, 203. Support wing, 204. Control valve, 3. Plunger cylinder, 4. Plunger pump, 401. Hydraulic power mechanism, 402. Rotating shaft, 403. Swash plate, 404. First through hole, 501. Turbine stator, 502. Turbine rotor, 6. Second through hole, 701. Upper joint, 702. Lower joint, 8. Bearing assembly. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-Figure 4 , the specific implementation of the present invention is described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific implementation. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] like Figure 1-Figure 4 As shown, the multi-support point support well wall posture control high deflection guide drilling tool provided by the present invention includes a drill pipe, a core shaft 101 and a drill bit, wherein the drill bit is connected to the drill pipe through the core shaft 101, and further includes: a shell assembly 102, an upper support mechanism 103, a lower support mechanism 104 and a hydraulic control circuit, wherein the shell assembly 102 is sleeved on the outer side of the core shaft 101 near the drill bit, and the shell assembly 102 is pivotally connected to the outer wall of the core shaft 101; the upper support mechanism 103 is arranged at the end of the shell assembly 102 away from the drill bit, and the upper support mechanism 103 is arranged at the end of the shell assembly 102 away from the drill bit, and the upper support mechanism 104 ... The supporting mechanism 103 can abut against the well wall; the lower supporting mechanism 104 is arranged at one end of the shell assembly 102 close to the drill bit, and the lower supporting mechanism 104 can abut against the well wall; the hydraulic control circuit is connected with the upper supporting mechanism 103 and the lower supporting mechanism 104, and the hydraulic control circuit is used to control the action of the upper supporting mechanism 103 and the lower supporting mechanism 104, so that the force applied by the upper supporting mechanism 103 to the shell assembly 102 is opposite in direction to the force applied by the lower supporting mechanism 104 to the shell assembly 102.

[0029] The working principle of the above embodiment is briefly described:

[0030] When the drilling tool is in use, one end of the mandrel 101 is connected to the drill pipe, and the other end of the mandrel 101 is connected to the drill bit. Then the drill rig is used to drive the drill pipe to rotate, thereby driving the mandrel 101 and the drill bit to rotate, and the drill bit moves into the wellbore. The mandrel 101 rotates relative to the shell assembly 102. During the process of the drill bit drilling into the wellbore, the upper support mechanism 103 and the lower support mechanism 104 are controlled to move through the hydraulic control circuit until the upper support mechanism 103 and the lower support mechanism 104 abut against the well wall. The upper support mechanism 103 and the lower support mechanism 104 are respectively supported on the well walls on both sides of the shell assembly 102. The directions of the forces applied to the well wall by the upper support mechanism 103 and the lower support mechanism 104 are opposite, and the upper support mechanism 103 and the lower support mechanism 104 are opposite. The support mechanism 104 is disposed at the front and rear ends of the shell assembly 102. Therefore, the support force applied by the well wall to the two ends of the shell assembly 102 causes the shell assembly 102 to form a certain torque, thereby causing the shell assembly 102 to deflect to a certain extent, thereby driving the drill bit to deflect, so as to utilize the entire drilling tool to drill inclined holes, and under the action of the upper support mechanism 103 and the lower support mechanism 104, the well wall can apply support forces in opposite directions to the two ends of the shell assembly 102, thereby improving the inclination capability of the entire drilling tool, so as to carry out short radius and ultra-short radius large curvature inclination and directional horizontal drilling, thereby realizing directional potential tapping and transformation of the target layer.

[0031] The multi-point supported well wall posture controlled high-inclination guide drilling tool of the present invention can make the well wall simultaneously apply supporting forces in opposite directions to both ends of the shell assembly 102, thereby improving the inclination ability of the entire drilling tool, so as to carry out short-radius and ultra-short-radius large-curvature inclination and directional horizontal drilling, thereby realizing directional potential tapping and transformation of the target layer.

[0032] On the basis of the above-mentioned embodiment, in order to simultaneously apply stable supporting forces in opposite directions to both ends of the housing assembly 102, the deflection capability of the entire drilling tool is improved.

[0033] like Figure 1-Figure 4 As shown, the upper support mechanism 103 and the lower support mechanism 104 have the same structure and both include a plurality of hydraulic cylinders 201. The plurality of hydraulic cylinders 201 are evenly distributed on the side wall of the shell assembly 102 along the circumference of the shell assembly 102. Each hydraulic cylinder 201 is connected to a control valve 204. Each control valve 204 is connected to the hydraulic control circuit. A support wing 203 is connected to the hydraulic piston 202 of each hydraulic cylinder 201. When the control valve 204 is opened, the hydraulic control circuit introduces hydraulic oil into the hydraulic cylinder 201, and the hydraulic piston 202 drives the support wing 203 to move radially along the core shaft 101, so that the support wing 203 applies extrusion force to the well wall.

[0034] During the process of the drilling rig driving the drill bit to drill, when it is necessary to control the drill bit to deflect toward the target area, the control valve 204 of the upper support mechanism 103 on the side deflected toward the target area and the control valve 204 of the lower support mechanism 104 on the side away from the target area are opened, and the remaining control valves 204 are closed. At this time, hydraulic oil is introduced into the hydraulic cylinder 201 of the upper support mechanism 103 and the hydraulic cylinder 201 of the lower support mechanism 104 through the hydraulic control circuit. The cylinders 201 are disposed on both sides of the core shaft 101. When hydraulic oil is introduced into the hydraulic cylinders 201 on both sides of the core shaft 101, the hydraulic cylinders 201 on both sides drive the support wings 203 connected to them to move toward the side away from the axis of the core shaft 101 until the support wings 203 on both sides abut against the well wall. The support wings 203 on both sides are used to apply a stable extrusion force to the well wall. With the support of the well wall, stable supporting forces in opposite directions can be applied to both ends of the shell assembly 102 at the same time, so as to drive the drill bit to deflect toward the side close to the target area, thereby improving the deflection capability of the entire drilling tool.

[0035] As a preferred solution, Figure 2 and Figure 3 As shown, the hydraulic control circuit includes a plunger pump 4, a high-pressure oil chamber and a hydraulic power mechanism 401, the hydraulic power mechanism 401 is connected to a drilling fluid supply device, the plunger pump 4 is connected to the output end of the hydraulic power mechanism 401, the high-pressure oil chamber is connected to the plunger pump 4, and each control valve 204 is connected to the high-pressure oil chamber. When the drilling fluid supply device supplies drilling fluid to the hydraulic power mechanism 401, the hydraulic power mechanism 401 drives the plunger pump 4 to move to pass high-pressure hydraulic oil into the high-pressure oil chamber. The drilling fluid supply device is used to pass drilling fluid into the hydraulic mechanism 401. When the drilling fluid flows through the hydraulic mechanism 401, the hydraulic mechanism 401 drives the plunger pump 4 to operate, thereby allowing high-pressure hydraulic oil to be passed into the high-pressure oil chamber. When it is necessary to control the drill bit to deflect toward the target area, the control valve 204 is opened, and the high-pressure hydraulic oil in the high-pressure oil chamber is passed into the hydraulic cylinder 201 of the upper support mechanism 103 or the lower support mechanism 104, thereby driving the support wings 203 of the upper support mechanism 103 or the lower support mechanism 104 to operate, thereby applying sufficient squeezing force to the support wings 203, thereby ensuring the deflection capability of the entire drilling tool.

[0036] As a preferred solution, Figure 2-Figure 4As shown, the plunger pump 4 includes a rotating shaft 402, a swash plate 403 and a plurality of plunger cylinders 3, the hydraulic mechanism 401 is connected to the rotating shaft 402, a first through hole 404 is provided in the core shaft 101, the rotating shaft 402 is pivotally connected in the first through hole 404 and is concentrically arranged with the core shaft 101, a plurality of plunger cylinders 3 are arranged along the circumferential direction of the core shaft 101, the cylinder body of each plunger cylinder 3 is connected to the rotating shaft 402, the axial direction of the cylinder body of each plunger cylinder 3 is parallel to the axial direction of the core shaft 101, the swash plate 403 is fixedly connected to the inner wall of the core shaft 101, the swash plate 403 is provided with a working surface which is at an acute angle to the axial direction of the core shaft 101, and the working surface abuts against the plunger of the plunger cylinder 3. When the drilling fluid flows through the hydraulic power mechanism 401, the hydraulic power mechanism 401 drives the rotating shaft 402 to rotate, and the rotating shaft 402 drives the cylinder bodies of multiple plunger cylinders 3 to rotate. Since the plunger of each plunger cylinder 3 abuts against the working surface of the swash plate 403, and the working surface of the swash plate 403 is at an acute angle to the axial direction of the core shaft 101, when the multiple plunger cylinders 3 rotate at a high speed relative to the swash plate 403, the working surface of the swash plate 403 will drive the plunger of each plunger cylinder 3 to reciprocate. The cylinder body of each plunger cylinder 3 is connected to an oil storage cylinder or a hydraulic oil supply device, and the plunger cylinder 3 reciprocates to pump and discharge oil. The plunger cylinder 3 draws low-pressure hydraulic oil from the oil storage cylinder or the hydraulic oil supply device and discharges high-pressure hydraulic oil into the high-pressure oil chamber. The high-pressure hydraulic oil is stored in the high-pressure oil chamber, thereby ensuring the stability of the high-pressure hydraulic oil supply, ensuring that the hydraulic piston 202 of the hydraulic cylinder 201 can provide stable hydraulic pressure to the support wing 203, and ensuring the deflection capability of the drilling tool.

[0037] As a preferred solution, Figure 2 and Figure 3 As shown, the hydraulic power mechanism 401 includes a hydraulic pump, a turbine stator 501 and a turbine rotor 502, the turbine stator 501 is arranged on the inner wall of the first through hole 404, the turbine rotor 502 is arranged on the rotating shaft 402, the input end of the hydraulic pump is connected to the drilling fluid supply device, the first through hole 404 is connected to the output end of the hydraulic pump, and when the drilling fluid flows through the first through hole 404, the drilling fluid drives the turbine rotor 502 to rotate. The hydraulic pump passes the drilling fluid provided by the drilling fluid supply device into the first through hole 404. When the drilling fluid passes through the first through hole 404, under the action of the turbine stator 501, the turbine rotor 502 and the rotating shaft 402 are driven to rotate. The rotating shaft 402 drives the swash plate 403 to rotate, thereby driving the multiple plunger cylinders 3 to move. The hydraulic power mechanism 401 of the drill tool relies on the hydraulic force of the drilling fluid to drive the rotating shaft 402 to rotate, and does not need to rely on electric components such as motors to drive it. It can provide a sufficiently large torque to the rotating shaft 402 in a smaller space, thereby ensuring that the swash plate 403 can continuously and stably drive the plunger movement of multiple plunger cylinders 3.

[0038] As a preferred solution, Figure 2-Figure 4As shown, the turbine rotor 502 is arranged in the middle of the rotating shaft 402, a second through hole 6 is arranged on the core shaft 101 near one end of the drill bit, and a liquid spraying port is arranged on the drill bit, and the liquid spraying port is communicated with the first through hole 404 through the second through hole 6. By providing the second through hole 6 and the liquid spraying port, the drilling fluid can not only drive the rotating shaft 402 to rotate when passing through the first through hole 404, but also the drilling fluid in the first through hole 404 can enter the liquid spraying port at the drill bit through the second through hole 6 after passing through the second through hole 6, and then be sprayed out through the liquid spraying port to cool the drill bit, thereby improving the drilling ability of the entire drilling tool.

[0039] As a preferred solution, Figure 4 As shown, the support wing 203 is a trapezoidal block structure, the small end face of the support wing 203 abuts against the well wall, and the length direction of the support wing 203 is in the same direction as the length direction of the core shaft 101. When the support wing 203 is set as a trapezoidal block structure, the drill bit drives the support wing 203 to move along the length direction of the wellbore when feeding. Since the length direction of the trapezoidal block is in the same direction as the length direction of the core shaft 101, and the small end face of the trapezoidal block abuts against the well wall, the friction between the support wing 203 and the well wall along the length direction of the wellbore can be reduced, thereby improving the drilling ability of the entire drilling tool.

[0040] As a preferred solution, Figure 1 and Figure 2 As shown, an upper joint 701 is provided at the upper end of the mandrel 101, and the upper joint 701 is detachably connected to the drill rod, and a lower joint 702 is provided at the lower end of the mandrel 101, and the lower joint 702 is detachably connected to the drill bit. By providing the upper joint 701 and the lower joint 702, the upper joint 701 is detachably connected to the drill rod, and the lower joint 702 is detachably connected to the drill bit, which can facilitate the disassembly and installation between the mandrel 101 and the housing assembly 102, thereby facilitating the use of the entire drilling tool.

[0041] As a preferred solution, Figure 1 and Figure 2 As shown, the mandrel 101 is pivotally connected to the housing assembly 102 via the bearing assembly 8. The mandrel 101 is pivotally connected to the housing assembly 102 via the bearing assembly 8, which can improve the stability of the rotation of the mandrel 101 when the housing assembly 102 is subjected to a supporting force in the opposite direction during the rotation of the mandrel 101 relative to the housing assembly 102, thereby ensuring the stability of the deflection of the drilling tool.

[0042] As a preferred solution, Figure 2 and Figure 3 As shown, the rotating shaft 402 is pivotally connected to the first through hole 404 via a high-speed bearing. The rotating shaft 402 is pivotally connected to the first through hole 404 via a high-speed bearing, which can ensure that the rotating shaft 402 rotates stably and at high speed.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-point support well wall posture control high deflection guide drilling tool, comprising a drill pipe, a core shaft (101) and a drill bit, wherein the drill bit is connected to the drill pipe through the core shaft (101), characterized in that: Also includes: A housing assembly (102) is sleeved on the outside of the core shaft (101) near one end of the drill bit, and the housing assembly (102) is pivotally connected to the outer wall of the core shaft (101); An upper support mechanism (103) is arranged at an end of the housing assembly (102) away from the drill bit, and the upper support mechanism (103) can abut against the well wall; A lower support mechanism (104) is arranged at one end of the housing assembly (102) close to the drill bit, and the lower support mechanism (104) can abut against the well wall; a hydraulic control circuit, connected to the upper support mechanism (103) and the lower support mechanism (104), the hydraulic control circuit being used to control the movement of the upper support mechanism (103) and the lower support mechanism (104), so that the force applied by the upper support mechanism (103) to the housing assembly (102) is in the opposite direction to the force applied by the lower support mechanism (104) to the housing assembly (102); The upper support mechanism (103) and the lower support mechanism (104) have the same structure and both include a plurality of hydraulic cylinders (201). The plurality of hydraulic cylinders (201) are evenly distributed on the side wall of the housing assembly (102) along the circumference of the housing assembly (102). Each hydraulic cylinder (201) is connected to a control valve (204). Each control valve (204) is in communication with the hydraulic control circuit. A support wing (203) is connected to the hydraulic piston (202) of each hydraulic cylinder (201). When the control valve (204) is opened, the hydraulic control circuit allows hydraulic oil to flow into the hydraulic cylinder (201), and the hydraulic piston (202) drives the support wing (203) to move radially along the core shaft (101), so that the support wing (203) applies extrusion force to the well wall. The hydraulic control circuit comprises a plunger pump (4), a high-pressure oil chamber and a hydraulic power mechanism (401); the hydraulic power mechanism (401) is connected to a drilling fluid supply device; the plunger pump (4) is connected to an output end of the hydraulic power mechanism (401); the high-pressure oil chamber is connected to the plunger pump (4); each control valve (204) is connected to the high-pressure oil chamber; when the drilling fluid supply device supplies drilling fluid to the hydraulic power mechanism (401), the hydraulic power mechanism (401) drives the plunger pump (4) to move so as to introduce high-pressure hydraulic oil into the high-pressure oil chamber; The plunger pump (4) comprises a rotating shaft (402), a swash plate (403) and a plurality of plunger cylinders (3); the hydraulic mechanism (401) is connected to the rotating shaft (402); a first through hole (404) is provided in the core shaft (101); the rotating shaft (402) is pivotally connected to the first through hole (404) and is arranged concentrically with the core shaft (101); the plurality of plunger cylinders (3) are arranged along the circumference of the core shaft (101); the cylinder body of each plunger cylinder (3) is connected to the rotating shaft (402); the axial direction of the cylinder body of each plunger cylinder (3) is parallel to the axial direction of the core shaft (101); the swash plate (403) is fixedly connected to the inner wall of the core shaft (101); the swash plate (403) is provided with a working surface which is at an acute angle to the axial direction of the core shaft (101); the working surface abuts against the plunger of the plunger cylinder (3); The hydraulic power mechanism (401) comprises a hydraulic pump, a turbine stator (501) and a turbine rotor (502); the turbine stator (501) is arranged on the inner wall of the first through hole (404); the turbine rotor (502) is arranged on the rotating shaft (402); the input end of the hydraulic pump is connected to the drilling fluid supply device; the first through hole (404) is connected to the output end of the hydraulic pump; when the drilling fluid flows through the first through hole (404), the drilling fluid drives the turbine rotor (502) to rotate.

2. The multi-support point support well wall posture control high deflection guide drilling tool according to claim 1, characterized in that: The turbine rotor (502) is arranged in the middle of the rotating shaft (402); a second through hole (6) is arranged on the core shaft (101) near one end of the drill bit; a liquid spraying port is arranged on the drill bit; and the liquid spraying port is connected to the first through hole (404) through the second through hole (6).

3. The multi-support point support well wall posture control high deflection guide drilling tool as claimed in claim 1, characterized in that: The support wing (203) is a trapezoidal block structure, the small end surface of the support wing (203) is in contact with the well wall, and the length direction of the support wing (203) is in the same direction as the length direction of the core shaft (101).

4. The multi-support point support well wall posture control high deflection guide drilling tool as claimed in claim 1, characterized in that: An upper joint (701) is provided at the upper end of the mandrel (101), and the upper joint (701) is detachably connected to the drill rod. A lower joint (702) is provided at the lower end of the mandrel (101), and the lower joint (702) is detachably connected to the drill bit.

5. The multi-support point support well wall posture control high deflection guide drilling tool as claimed in claim 1, characterized in that: The core shaft (101) and the housing assembly (102) are pivotally connected via a bearing assembly (8).

6. The multi-support point support well wall posture control high deflection guide drilling tool as claimed in claim 1, characterized in that: The rotating shaft (402) is pivotally connected to the first through hole (404) via a high-speed bearing.

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