Downhole vector steering sidetrack drilling tool and sidetrack drilling operation method

Abstract

The invention belongs to the technical field of well drilling, and discloses a downhole vector steering sidetrack drilling tool and a sidetrack drilling operation method.The downhole vector steering sidetrack drilling tool comprises a guide mechanism and an anchoring mechanism, the guide mechanism comprises an inclined body, a guide shell and a rotary driving assembly, and the inclined body is axially limited in the guide shell; the rotary driving assembly is located in the guide shell and connected with the slant body, and the rotary driving assembly is configured to drive the slant body to rotate around the axis of the slant body; the anchoring mechanism is connected with an external liquid supply device through a hydraulic oil pipe penetrating through the guide shell and the inclined body, and anchoring and unanchoring of the anchoring mechanism can be achieved by injecting high-pressure hydraulic oil into a fluid channel of the anchoring mechanism or discharging the high-pressure hydraulic oil in the fluid channel. According to the underground vector steering sidetrack drilling tool, a plurality of well holes can be drilled in the preset working well section in the circumferential direction on the premise of one-time well descending, the operation efficiency is high, and the operation cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of drilling, and in particular to a downhole vector steering sidetracking tool and a sidetracking operation method. Background Art

[0002] Radial drilling technology is the product of the in-depth development of conventional horizontal well technology. It can successfully penetrate the contaminated area near the wellbore and significantly expand the oil leakage radius, thereby effectively improving the production capacity of oil and gas wells and the injection efficiency of water injection wells. The principle of radial drilling technology is to first use a drill bit to mill holes on the casing in the oil layer, and then use a hose with a jet drill bit to drill multiple wells in different directions in the oil layer with the help of the hydraulic rock breaking effect of high-pressure jets.

[0003] During radial drilling, the drill bit needs to be guided by a whipstock. However, the whipstock in the prior art can only be used once. When drilling multiple wellbores in different directions of the oil layer, the whipstock needs to be lowered into the well multiple times, resulting in low operating efficiency and high operating costs. Summary of the invention

[0004] The object of the present invention is to provide a downhole vector steering sidetracking tool and a sidetracking operation method, which can solve the problems that the whipstock can only be used once, the operation efficiency is low, and the operation cost is high.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides a downhole vector steering sidetracking tool, including a guide mechanism and an anchoring mechanism, wherein the guide mechanism includes an oblique body, a guide shell and a rotary drive assembly, wherein the oblique body is axially limited at the guide shell, the rotary drive assembly is located in the guide shell and connected to the oblique body, and the rotary drive assembly is configured to drive the oblique body to rotate around its own axis; the anchoring mechanism includes an anchor body, an anchor plate, an elastic member, a first solenoid valve, a second solenoid valve and a hydraulic oil pipe, wherein the anchor body is fixedly connected to the guide shell along the axial direction, and an anchor groove is provided on the periphery of the anchor body The anchor plate is movably arranged in the anchor groove along the radial sealing of the anchor body, and the elastic member provides elastic force to the anchor plate so that the anchor plate maintains a tendency to abut against the bottom of the anchor groove. A fluid channel is also arranged in the anchor body, one end of the fluid channel passes through the bottom of the anchor groove, and the other end of the fluid channel is connected to the hydraulic oil pipe through the first solenoid valve, and the hydraulic oil pipe passes through the guide housing and the oblique body and is connected to an external liquid supply device. The fluid channel also has a drain port connected to the outside of the anchor body, and the second solenoid valve is arranged at the drain port.

[0007] In one embodiment, the guide shell includes a main shell, an end cover and a limit block. A first oil pipe hole for the hydraulic oil pipe to pass through is axially opened on the side wall of the main shell. The end cover is fixed to one end of the main shell facing the inclined body. A limit groove is circumferentially opened at one end of the inclined body that penetrates into the main shell through the end cover. The limit block is embedded in the limit groove and at least partially protrudes from the limit groove.

[0008] In one embodiment, the oblique body is an integrated structure, comprising an oblique body, a guide head and a first straightening block, the guide head is connected to one end of the oblique body away from the guide shell, the guide head is used to connect a launching tool, the first straightening block is arranged on the oblique body, and a second oil pipe hole is opened on the oblique body for the hydraulic oil pipe to pass through.

[0009] In one embodiment, the rotary drive assembly includes a rotary motor and a spline shaft, and the rotary motor is spline-connected to the oblique body via the spline shaft.

[0010] In one embodiment, the rotary drive assembly further includes a planetary gear train, an inner gear ring is provided at one end of the spline shaft away from the oblique body, and the rotary motor is transmission-connected to the spline shaft via the planetary gear train meshing with the inner gear ring.

[0011] In one embodiment, a first mounting groove for mounting the first solenoid valve and a second mounting groove for mounting the second solenoid valve are formed around the anchor body, and both the first mounting groove and the second mounting groove are in communication with the fluid channel.

[0012] In one embodiment, the fluid channel axially penetrates through an end surface of the anchor body connected to the guide housing, and one end of the fluid channel penetrating the anchor body is sealed with a sealing joint.

[0013] In one embodiment, the downhole vector steering side drilling tool also includes a control mechanism, which includes a battery housing, a circuit board, a battery and a pressure sensor. The battery housing is fixed to an end of the anchor body away from the guide mechanism, and the battery and the circuit board are both built into the battery housing. The circuit board is connected to the first solenoid valve, the second solenoid valve and the pressure sensor, and the sensing end of the pressure sensor is exposed from the battery housing.

[0014] In one embodiment, a plurality of second straightening blocks are arranged at intervals in the circumferential direction of the battery housing, and the pressure sensor is arranged between two adjacent second straightening blocks.

[0015] In a second aspect, the present invention provides a sidetracking operation method. Based on the above-mentioned downhole vector steering sidetracking tool operation, the sidetracking operation method comprises the following steps:

[0016] S1. Use a launching tool to lower the downhole vector steering sidetracking tool to a designated position of the working well section, open the first solenoid valve, inject hydraulic oil into the fluid channel, so that the anchor plate is pushed out of the anchor groove, so as to lock the downhole vector steering sidetracking tool at the designated position of the working well section;

[0017] S2, lifting the delivery tool;

[0018] S3, lowering the flexible drilling tool so that the drill bit of the flexible drilling tool abuts against the inclined body, the flexible drilling tool performs side drilling and window opening, and after the window opening, the flexible drilling tool is lifted up;

[0019] S4, the rotation drive assembly drives the oblique body to rotate circumferentially;

[0020] S5, repeating step S3 and step S4 until the side drilling and window opening operations at multiple directions of the designated position of the working well section are completed;

[0021] S6. Open the second solenoid valve to retract the anchor plate into the anchor groove, and use a recovery tool to lift and recover the downhole vector steering sidetracking tool.

[0022] Beneficial effects of the present invention:

[0023] The downhole vector steering side drilling tool and side drilling operation method proposed in the present invention can make the inclined body rotate around its own axis through the arranged rotary drive component, flexibly adjust the side drilling window direction, and can effectively avoid the downhole vector steering side drilling tool from being repeatedly lowered into the well, thereby improving the operation efficiency and greatly reducing the operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a downhole vector steering sidetracking tool according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0026] Figure 3 is a schematic structural diagram of an oblique body in an embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of a spline shaft in an embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram of a guide housing in an embodiment of the present invention;

[0029] Figure 6 is a schematic structural diagram of an anchoring body in an embodiment of the present invention;

[0030] Figure 7 Schematic diagram of the structure of the battery housing in an embodiment of the present invention.

[0031] In the figure:

[0032] 10. Guide mechanism; 11. Oblique body; 111. Guide head; 112. Oblique main body; 1121. Second oil pipe hole; 1122. Limiting groove; 1123. Spline hole; 113. First straightening block; 12. Guide housing; 121. Main housing; 1211. First oil pipe hole; 122. End cover; 123. Limiting block; 13. Rotary drive assembly; 131. Rotary motor; 132. Spline shaft; 1321. Internal gear ring; 133. Planetary gear train; 134. Motor fixing bracket; 135. Limiting cover;

[0033] 20. Anchoring mechanism; 21. Anchoring body; 211. Anchoring groove; 212. Fluid channel; 213. First mounting groove; 214. Second mounting groove; 215. Cable groove; 22. Anchoring plate; 23. Elastic member; 24. Anchoring limit plate; 25. First solenoid valve; 26. Second solenoid valve; 27. Hydraulic oil pipe; 28. Sealing joint;

[0034] 30. Control mechanism; 31. Battery housing; 311. Second straightening block; 312. Third mounting slot; 32. Circuit board; 33. Battery; 34. Pressure sensor. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] refer to Figure 1-Figure 7 As shown, in an embodiment of the present invention, a downhole vector steering sidetracking tool is proposed, including a guide mechanism 10 and an anchoring mechanism 20, wherein the guide mechanism 10 includes an inclined body 11, a guide shell 12 and a rotary drive assembly 13, the inclined body 11 is axially limited in the guide shell 12 and is connected to the rotary drive assembly 13 located in the guide shell 12, the inclined body 11 has an inclined surface for guiding the drill bit, and the rotary drive assembly 13 is configured to drive the inclined body 11 to rotate around its own axis to adjust the orientation of the inclined surface. The anchoring mechanism 20 includes an anchoring body 21, an anchoring plate 22, an elastic member 23, a first solenoid valve 25, a second solenoid valve 26 and a hydraulic oil pipe 27. The anchoring body 21 is fixedly connected to the guide housing 12 along the axial direction. The anchoring body 21 is provided with a plurality of anchoring grooves 211 along the circumferential direction. The anchoring plate 22 is movably arranged in the anchoring groove 211 along the radial direction of the anchoring body 21. The elastic member 23 provides elastic force to the anchoring plate 22 so that the anchoring plate 22 maintains a tendency to abut against the bottom of the anchoring groove 211. The anchoring body 21 is also provided with a connecting member 24. A fluid channel 212 passes through the anchor groove 211, one end of the fluid channel 212 passes through the bottom of the anchor groove 211, and the other end is connected to the hydraulic oil pipe 27 through the first solenoid valve 25. The first solenoid valve 25 is fixed on the anchor body 21, and the hydraulic oil pipe 27 passes through the guide shell 12 and the inclined body 11 to be connected to the external liquid supply device. The fluid channel 212 also has a drain port connected to the outside of the anchor body 21. The second solenoid valve 26 is arranged at the drain port to control the connection and disconnection of the fluid channel 212 and the outside of the anchor body 21.

[0040] The above-mentioned downhole vector steering sidetracking tool can be locked at a designated position of the working well section through the anchoring mechanism 20, and the oblique body 11 can be driven to rotate circumferentially through the rotary drive assembly 13, thereby completing the adjustment of the circumferential position of the oblique surface, that is, one trip down the well can assist in completing multiple sidetracking window openings by the drill bit, thereby improving the operation efficiency and reducing the operation cost. It should be emphasized that since the hydraulic oil pipe 27 passes through the guide housing 12 and the oblique body 11 and is connected to the external fluid supply device, it does not occupy additional downhole space and is not easily damaged during the downhole process, thereby extending the service life of the radial vector steering sidetracking tool.

[0041] In order to achieve the axial limit between the oblique body 11 and the guide housing 12, refer to Figure 1 As shown, the guide housing 12 includes a main housing 121, an end cover 122 and a stopper 123, wherein the main housing 121 is configured as a hollow cylindrical structure with openings at both ends in the axial direction, and a first oil pipe hole 1211 for the hydraulic oil pipe 27 to pass through is axially penetrated on the side wall of the main housing 121, and the end cover 122 is fixedly inserted at one end of the main housing 121 facing the oblique body 11 by means including but not limited to threaded connection and clamping, and a through hole is provided on the end cover 122 for the oblique body 11 to be inserted into the interior of the guide housing 12, and the size of the through hole is adapted to the size of the oblique body 11, and a stopper groove 1122 is provided in the circumference of the oblique body 11, and the stopper block 123 is embedded in the stopper groove 1122 and at least partially protrudes from the stopper groove 1122. Further, in order to make the oblique body 11 completely stationary in the axial direction relative to the guide housing 12, the stopper block 123 abuts against the end cover 122.

[0042] Exemplarily, the end cover 122 is threadedly connected to the main housing 121 .

[0043] refer to Figure 3 As shown, the oblique body 11 is an integrated structure, including an oblique main body 112, a guide head 111 and a first straightening block 113, wherein the guide head 111 is used to connect a launching tool or a recovery tool, the oblique surface and the limit groove 1122 are both arranged on the oblique main body 112, the guide head 111 is connected to one end of the oblique main body 112 away from the guide shell 12 and is arranged as a cylindrical structure with open axial ends, the first straightening block 113 is arranged at one end of the oblique main body 112 away from the guide head 111 and is located outside the guide shell 12, so as to straighten the oblique body 11 during the process of going down into the well, and multiple first straightening blocks 113 are arranged at intervals along the circumference of the oblique main body 112. At the same time, a second oil pipe hole 1121 is also provided on the inclined main body 112. The end of the second oil pipe hole 1121 away from the guide shell 12 passes through the end face of the inclined main body 112 and coincides with the axis of the inclined main body 112. A spline hole 1123 for spline connection with the rotating drive assembly 13 is provided on the end face of the inclined main body 112 away from the guide head 111.

[0044] refer to Figure 2 As shown, the rotary drive assembly 13 includes a rotary motor 131 and a spline shaft 132 . One end of the spline shaft 132 is inserted into a spline hole 1123 provided on the inclined body 11 , and the other end is transmission-connected to the rotary motor 131 . The rotary motor 131 is fixed in the guide housing 12 via a motor fixing bracket 134 .

[0045] Optionally, the rotary drive assembly 13 also includes a planetary gear train 133, and an inner gear ring 1321 is provided at one end of the spline shaft 132 away from the inclined body 11. The rotary motor 131 is connected to the spline shaft 132 through the planetary gear train 133 meshing with the inner gear ring 1321, thereby driving the spline shaft 132 to drive the inclined body 11 to rotate.

[0046] More specifically, the rotary drive assembly 13 also includes a limit cover 135 threadedly connected to the motor fixing frame 134. One end of the spline shaft 132 is provided with an inner gear ring 1321 which passes through the limit cover 135 and meshes with the planetary gear train 133. The outer peripheral contour size of the inner gear ring 1321 is larger than the size of the through hole on the limit cover 135 for the spline shaft 132 to pass through. The limit cover 135 limits the axial position of the spline shaft 132 to prevent the spline shaft 132 from detaching from the planetary gear train 133.

[0047] Optionally, the anchor body 21 is fixedly connected to the guide housing 12 by means including but not limited to bolt connection and clamping. Specifically, the anchor body 21 is provided with a first mounting groove 213 for mounting the first solenoid valve 25 and a second mounting groove 214 for mounting the second solenoid valve 26 in the circumference thereof, and the first mounting groove 213 and the second mounting groove 214 are both in communication with the fluid channel 212.

[0048] Exemplarily, in order to allow multiple anchor plates 22 to extend synchronously from the anchor body 21, the fluid channel 212 is arranged at the axis of the anchor body 21. At the same time, in order to reduce the difficulty of processing the fluid channel 212, the fluid channel 212 axially penetrates the end face of the anchor body 21 connected to the guide shell 12, and the end of the fluid channel 212 connected to the end face is sealed with a sealing joint 28.

[0049] In addition, the elastic member 23 is a spring, and two ends of the spring are respectively connected and fixed to the anchoring limit plate 24 and the anchoring plate 22 in the anchoring groove 211 . The anchoring plate 22 is provided with an avoidance groove for avoiding the anchoring limit plate 24 .

[0050] The downhole vector steering side drilling tool also includes a control mechanism 30, which includes a battery housing 31, a circuit board 32, a battery 33 and a pressure sensor 34. The battery housing 31 is fixed to the axial end of the anchor body 21 away from the guide mechanism 10 by means including but not limited to threaded connection. The battery 33 and the circuit board 32 are both built into the battery housing 31. The circuit board 32 is connected to the first solenoid valve 25, the second solenoid valve 26 and the pressure sensor 34 through cables, and at least the sensing end of the pressure sensor 34 is exposed to the battery housing 31.

[0051] Specifically, the battery housing 31 is provided with a third installation groove 312 for installing the pressure sensor 34 . In order to reduce the possibility of cable damage, the anchor body 21 is also provided with a cable groove 215 for the cable connecting the first solenoid valve 25 and the second solenoid valve 26 to pass through.

[0052] Optionally, a plurality of second straightening blocks 311 are arranged at circumferential intervals on the battery casing 31 to guide the battery casing 31 during the process of going down into the well. On this basis, in order to avoid damage to the pressure sensor 34 , a third mounting groove 312 is arranged between two adjacent second straightening blocks 311 .

[0053] The embodiment of the present invention further provides a method for sidetracking operation based on the downhole vector steering sidetracking tool, comprising the following steps:

[0054] S1. The launching tool is securely connected to the downhole vector steering sidetracking tool through the shear pin, and then lowered together to the designated position of the working well section. During this process, the hydraulic oil supply interface of the launching tool is tightly connected to the hydraulic oil pipe 27, ensuring that the high-pressure hydraulic oil in the external fluid supply device can be smoothly pumped into the fluid channel 212 through the hydraulic oil pipe 27. With the injection of hydraulic oil, the anchoring mechanism 20 is activated, and the anchoring plate 22 is partially pushed out of the anchoring groove 211, firmly locking the downhole vector steering sidetracking tool at the designated position of the working well section.

[0055] S2. After anchoring is completed, the shear pin is disconnected by shearing operation, and then the delivery tool is lifted up. During this lifting action, the hydraulic oil supply interface and the hydraulic oil pipe 27 are automatically separated, so that the delivery tool is smoothly recovered. The entire operation process ensures the accuracy and efficiency of the tool lowering, anchoring, separation and recovery.

[0056] S3. The flexible drilling tool is lowered, and the drill bit of the flexible drilling tool passes through the guide head 111 and abuts against the inclined surface. The inclined body 11 maintains the overall orientation of the drilling tool during drilling, and cooperates with the anchoring mechanism 20 to ensure the overall stability of the drilling tool for side drilling and window opening. After the window opening operation at the predetermined orientation is completed, the flexible drilling tool is lifted up.

[0057] S4, the oblique body 11 turns: the rotating motor 131 drives the inner gear ring 1321 on the spline shaft 132 to rotate circumferentially, thereby driving the oblique body 11 to rotate circumferentially to another predetermined direction;

[0058] S5. Repeat steps S3 and S4 until the side drilling and window opening operations in multiple directions of the designated position of the working well section are completed.

[0059] S6. The recovery tool is lowered to the upper end of the oblique body 11, the anchor claws on the recovery tool anchor and grasp the guide head 111 of the oblique body 11 of the downhole vector steering sidetracking tool, the wellhead releases a hydraulic signal, the pressure sensor 34 receives the supply signal, drives the second solenoid valve 26 to open and release the hydraulic oil to relieve pressure, the anchor plate 22 retracts into the anchor groove 211, and the recovery tool is lifted up to recover the downhole vector steering sidetracking tool.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Downhole vector steering sidetracking tool, characterized in that: include: A guide mechanism (10), the guide mechanism (10) comprising an oblique body (11), a guide housing (12) and a rotation drive assembly (13), the oblique body (11) being axially limited in the guide housing (12), the rotation drive assembly (13) being located in the guide housing (12) and connected to the oblique body (11), the rotation drive assembly (13) being configured to drive the oblique body (11) to rotate around its own axis; The anchoring mechanism (20) comprises an anchoring body (21), an anchoring plate (22), an elastic member (23), a first electromagnetic valve (25), a second electromagnetic valve (26) and a hydraulic oil pipe (27); the anchoring body (21) is fixedly connected to the guide housing (12) along the axial direction; an anchoring groove (211) is arranged on the outer periphery of the anchoring body (21); the anchoring plate (22) is arranged in the anchoring groove (211) along the radial direction of the anchoring body (21) for sealing movement; the elastic member (23) provides elastic force to the anchoring plate (22) so that the anchoring plate (22) is kept in contact with the anchoring groove (211); The anchor body (21) has a tendency to move toward the bottom of the groove (211), and a fluid channel (212) is also arranged in the anchor body (21). One end of the fluid channel (212) passes through the bottom of the anchor groove (211), and the other end of the fluid channel (212) is connected to the hydraulic oil pipe (27) through the first solenoid valve (25). The hydraulic oil pipe (27) passes through the guide housing (12) and the inclined body (11) and is connected to an external liquid supply device. The fluid channel (212) also has a drain port connected to the outside of the anchor body (21), and the second solenoid valve (26) is arranged at the drain port.

2. The downhole vector steering sidetracking tool according to claim 1, characterized in that: The guide housing (12) comprises a main housing (121), an end cover (122) and a limit block (123); a first oil pipe hole (1211) for the hydraulic oil pipe (27) to pass through is axially provided on a side wall of the main housing (121); the end cover (122) is fixed to one end of the main housing (121) facing the inclined body (11); a limit groove (1122) is circumferentially provided on one end of the inclined body (111) that penetrates into the main housing (121) through the end cover (122); and the limit block (123) is embedded in the limit groove (1122) and at least partially protrudes from the limit groove (1122).

3. The downhole vector steering sidetracking tool according to claim 1, characterized in that: The oblique body (11) is an integrated structure, comprising an oblique main body (112), a guide head (111) and a first straightening block (113); the guide head (111) is connected to an end of the oblique main body (112) away from the guide housing (12); the guide head (111) is used to connect a launching tool and a recovery tool; the first straightening block (113) is arranged on the oblique main body (112); and a second oil pipe hole (1121) for the hydraulic oil pipe (27) to pass through is provided on the oblique main body (112).

4. The downhole vector steering sidetracking tool according to claim 1, characterized in that: The rotary drive assembly (13) comprises a rotary motor (131) and a spline shaft (132), and the rotary motor (131) is connected to the spline of the oblique body (11) via the spline shaft (132).

5. The downhole vector steering sidetracking tool according to claim 4, characterized in that: The rotary drive assembly (13) further comprises a planetary gear train (133); an inner gear ring (1321) is provided at one end of the spline shaft (132) away from the oblique body (11); and the rotary motor (131) is transmission-connected to the spline shaft (132) via the planetary gear train (133) meshing with the inner gear ring (1321).

6. The downhole vector steering sidetracking tool according to claim 1, characterized in that: The anchor body (21) is provided with a first mounting groove (213) for mounting the first solenoid valve (25) and a second mounting groove (214) for mounting the second solenoid valve (26) on its circumference, and both the first mounting groove (213) and the second mounting groove (214) are in communication with the fluid channel (212).

7. The downhole vector steering sidetracking tool according to claim 1, characterized in that: The fluid channel (212) axially penetrates an end surface of the anchor body (21) connected to the guide housing (12), and the end of the fluid channel (212) penetrating the anchor body (21) is sealed with a sealing joint (28).

8. The downhole vector steering sidetracking tool according to any one of claims 1 to 7, characterized in that: The downhole vector steering sidetracking tool further comprises a control mechanism (30), wherein the control mechanism (30) comprises a battery housing (31), a circuit board (32), a battery (33) and a pressure sensor (34); the battery housing (31) is fixed to an end of the anchor body (21) away from the guide mechanism (10); the battery (33) and the circuit board (32) are both built into the battery housing (31); the circuit board (32) is connected to the first solenoid valve (25), the second solenoid valve (26) and the pressure sensor (34); and the sensing end of the pressure sensor (34) is exposed from the battery housing (31).

9. The downhole vector steering sidetracking tool according to claim 8, characterized in that: A plurality of second straightening blocks (311) are arranged at intervals in the circumferential direction of the battery housing (31), and the pressure sensor (34) is arranged between two adjacent second straightening blocks (311).

10. A side drilling method, characterized in that: Based on the downhole vector steering sidetracking tool operation according to any one of claims 1 to 9, the sidetracking operation method comprises the following steps: S1. Using a launching tool, lower the downhole vector steering sidetracking tool to a designated position of the working well section, open the first solenoid valve (25), and inject hydraulic oil into the fluid channel (212), so that the anchor plate (22) is partially pushed out of the anchor groove (211), so as to lock the downhole vector steering sidetracking tool at the designated position of the working well section; S2, lifting the delivery tool; S3, lowering the flexible drilling tool so that the drill bit of the flexible drilling tool abuts against the inclined body (11), and the flexible drilling tool performs side drilling to open a window, and after the window is opened, the flexible drilling tool is lifted up; S4, the rotation drive assembly (13) drives the oblique body (11) to rotate circumferentially; S5, repeating step S3 and step S4 until the side drilling and window opening operations at multiple directions of the designated position of the working well section are completed; S6. Open the second solenoid valve (26) to retract the anchor plate (22) into the anchor groove (211), and use a recovery tool to lift and recover the downhole vector steering sidetracking tool.

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