Recyclable hydraulic wall-integrated sidetracking tool

Abstract

A retrievable, well-wall-adhering integrated hydraulic sidetracking tool includes a hollow milling cone, a guide wedge, and a setting and anchoring device connected in sequence. A well-wall-adhering device is located between the guide wedge and the setting and anchoring device. This device includes a plunger sleeve, support slips, a plunger, and an upper limit tube. The upper end of the plunger sleeve is connected to the guide wedge, and the lower end is connected to the cylinder liner of the setting and anchoring device via a core connector. The two ends of the central hole of the core connector are connected to the upper limit tube and the central tube of the setting and anchoring device, respectively. The upper limit tube has evenly distributed strip-shaped holes. The support slips are wedge-shaped and fixed in a wedge-shaped groove at the lower end of the guide wedge with shear screws. The lower end is inserted into the plunger sleeve and rests against the top surface of the plunger. A jet tube is located between the plunger and the guide wedge. This tool facilitates milling cone windowing operations, avoiding collisions and obstructions to drill bits, drilling tools, logging instruments, and completion casings as they pass over the top of the guide wedge during subsequent sidetracking operations, thus improving sidetracking efficiency.

Description

Technical Field

[0001] This invention pertains to well workover tools, and specifically relates to a retrievable, integrated hydraulic side-drilling tool that rests against the well wall. Background Technology

[0002] Sidetracking tools are workover tools used for window-opening sidetracking in wells. Existing sidetracking tools can be divided into two types: separate and integrated. Separate sidetracking tools consist of a guide vane and a milling cone, which are independent and must be lowered into the well separately during operation, resulting in low efficiency. Integrated sidetracking tools combine the guide vane and milling cone into one unit, allowing them to be lowered into the well simultaneously during operation, thus increasing efficiency. Integrated sidetracking tools are further divided into non-recoverable and recoverable types. Non-recoverable types, such as the integrated window-opening sidetracking tool disclosed in publication number CN102364029A, cannot be recovered after window-opening sidetracking, leading to high operating costs.

[0003] Recyclable tools include, for example, a recyclable integrated window-opening side-drilling tool disclosed in CN216446880U. This side-drilling tool comprises a hollow milling cone, a guide wedge, and a setting and anchoring device connected in sequence. The setting and anchoring device includes a cylinder liner, a conical body, a limiting tube, and slips disposed within the cylinder liner. The conical body has a smaller outer diameter at the top and a larger outer diameter at the bottom. A ball seat with an internal setting edge is fixed at the lower end within the cylinder liner, and a setting steel ball is disposed within the ball seat. The lower end of the limiting tube is fixedly connected to the ball seat, and the upper part of the limiting tube is movably connected to the conical body via a fine-pitch thread, allowing drilling fluid to enter the annular cavity below the conical body within the cylinder liner and push the conical body upwards. The slips are divided into multiple longitudinal slips and radial slips, which are alternately arranged and evenly connected to the upper edge of the conical body along the circumferential direction via shear screws.

[0004] While this retrievable integrated sidetracking tool boasts high efficiency, complete recovery after sidetracking completion, wide applicability, and low operating costs due to its simple processing and reusability after recovery, a significant drawback is its location. Because the tool is centered within the wellbore after setting, a gap exists between the top outer edge of the guide wedge and the wellbore wall. This creates a prominent jamming edge at the top of the guide wedge within the wellbore. During subsequent sidetracking operations, drill bits, drilling tools, logging instruments, and completion casing may collide with or be obstructed when passing through this area. This is particularly problematic when using cylindrical fishing tools to handle complex downhole conditions or coring tools, as these tools may be unable to pass through this jamming edge. Therefore, the application of this retrievable guide wedge is somewhat limited. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a recoverable, well-wall integrated hydraulic side-drilling tool that is both beneficial for milling cone window opening operations and can avoid collisions and obstructions of tools such as drill bits, drilling tools, logging instruments and completion casings when passing the top of the guide wedge during subsequent side-drilling operations, thereby improving side-drilling efficiency.

[0006] The technical solution of the present invention is as follows:

[0007] A retrievable, wall-hugging integrated hydraulic side-drilling tool includes a hollow milling cone, a guide wedge, and a setting and anchoring device connected in sequence. Its key feature is the wall-hugging device connected between the guide wedge and the setting and anchoring device. This wall-hugging device includes a plunger sleeve and supporting slips. The plunger sleeve contains an interconnected plunger and an upper limit tube. The upper end of the plunger sleeve is fixedly connected to the guide wedge, and the lower end is fixedly connected to the cylinder liner of the setting and anchoring device via a core connector. The two ends of the central hole are fixedly connected to the lower end of the upper limit tube and the upper end of the central tube of the setting and anchoring device, respectively. Multiple strip-shaped holes are evenly distributed on the outer wall of the upper limit tube to guide drilling fluid into the plunger sleeve and push the plunger upward. The support slip is wedge-shaped and fixed in the wedge-shaped groove at the lower end of the guide wedge with shear screws. The center line of the inclined surface of the support slip is aligned with the center line of the inclined surface of the guide wedge and the lower end is inserted into the plunger sleeve and rests against the top surface of the plunger. A jet tube is inserted between the plunger and the central hole of the guide wedge.

[0008] As a further preferred embodiment, the plunger is connected to the upper limit tube by a fine-tooth sawtooth thread, and the fine-tooth sawtooth thread tip at the upper end of the upper limit tube faces upward, so that the plunger will not retract after jumping and moving upward under the push of the drilling fluid, thereby ensuring that the support slip is firmly supported.

[0009] As a further preferred embodiment, a rectangular notch is provided at the upper end of the plunger sleeve corresponding to the support slip, and the lower end of the support slip is inserted into the plunger sleeve through the rectangular notch and has locking teeth on its outer edge.

[0010] As a further preferred embodiment, the outer edge of the plunger is in sliding clearance fit with the plunger sleeve, and a sealing ring is provided between the outer edge of the plunger and the plunger sleeve.

[0011] As a further preferred option, a T-shaped opening is provided on the wedge of the guide to facilitate hooking and retrieving the guide.

[0012] As a further preferred embodiment, the setting and anchoring device includes a cylinder liner, within which are provided a conical body, a central tube, a lower limiting tube, and setting slips; a ball seat with an internal setting edge is provided at the lower end of the cylinder liner, and a setting steel ball is provided inside the ball seat; the lower end of the lower limiting tube is fixedly connected to the ball seat, and the upper part of the lower limiting tube is movably connected to the conical body through a fine thread, so that after the drilling fluid enters the annular cavity located below the conical body in the cylinder liner, it can push the conical body upward.

[0013] As a further preferred embodiment, the setting slips are divided into multiple alternating longitudinal slips and radial slips, which are evenly connected to the upper part of the outer edge of the conical body along the circumferential direction by shear screws, and are used to extend from the outer wall of the cylinder liner under the push of the conical body to realize the longitudinal and radial positioning of the guide.

[0014] As a further preferred embodiment, the lower end of the central tube is sealed and inserted into the conical body.

[0015] As a further preferred embodiment, the outer diameter of the cone is smaller at the top and larger at the bottom.

[0016] The beneficial effects of this invention are:

[0017] 1. During the pressure setting of this side-drilling tool, drilling fluid is introduced into the plunger sleeve through the strip hole on the upper limit tube, pushing the plunger upward. This pushes the support slips to shear the shear screw, allowing the support slips to move upward along the wedge-shaped groove until they contact the well wall. The entire side-drilling tool can then be pushed to the other side of the well wall, ensuring the back of the guide wedge is flush against the well wall. This eliminates the gap between the guide wedge and the well wall, preventing the top of the guide wedge from forming an abrupt jamming edge in the wellbore. This not only reduces the amplitude of the guide wedge's inclined surface during taper window opening operations, but also improves the window opening process. The process is more stable, avoiding failure of the guide rail's wedge setting and milling cone tooth breakage, and improving the speed and efficiency of window opening; moreover, it can avoid collisions and obstructions of drill bits, drilling tools, logging instruments and completion casings when passing over the top of the guide rail during subsequent sidetracking operations. Especially when it is necessary to use cylindrical fishing tools to deal with complex downhole conditions or to use coring tools to obtain cores, it can ensure that the cylindrical fishing tools or coring tools can pass smoothly through the top of the guide rail to enter the window and the new sidetracking wellbore without encountering obstruction problems. There is no need for additional operations such as well cleaning and window repair, which can significantly reduce sidetracking costs.

[0018] 2. Because the support slips are pressed between the wedge-shaped groove at the lower end of the guide wedge and the well wall under the push of the plunger, when the guide wedge is lifted by the retrieval tool after the window side-drilling is completed, the support slips are on a downward slope relative to the wedge-shaped groove, so the support slips are easy to release. Moreover, since there is only one cone inside the cylinder sleeve of the setting and anchoring device, after the window side-drilling is completed, the longitudinal and radial slips of the setting and anchoring device can be driven upward by the plunger sleeve and core joint, and the lower limit tube can be driven to slide into the cone, thereby loosening and releasing the longitudinal and radial slips stuck on the well wall, and then the entire side-drilling tool can be pulled out. This allows for complete recovery after the side-drilling operation is completed, and after simple processing, it can be reused, resulting in low operating costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 yes Figure 1 AA sectional view.

[0021] Figure 3 yes Figure 1 A partial top view.

[0022] In the diagram: 1. Milling cone, 101. Secondary water hole, 2. Locating key, 3. Locating screw, 4. Locating block, 5. Fastening screw, 6. Milling cone head, 7. Liquid guide tube, 8. Inclined guide wedge, 801. T-shaped opening, 9. Support slip, 10. Shearing screw, 11. Jet tube, 12. Plunger sleeve, 13. Plunger, 14. Upper limit tube, 141. Strip hole, 15. Core connector, 16. Center tube, 17. Setting slip, 18. Shearing screw, 19. Cone, 20. Lower limit tube, 201. Strip hole, 21. Cylinder liner, 22. Ball seat, 23. Setting steel ball. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-3 As shown, the present invention relates to a retrievable hydraulic guide tool that rests against the well wall, comprising a hollow milling cone 1, a guide tool wedge 8, a well wall resting device, and a setting and anchoring device connected in sequence. A positioning key 2 is provided radially on the milling cone 1. The positioning key 2 protrudes from the inner wall of the milling cone 1 and is aligned with the center line of the inclined surface of the guide tool wedge 8. The positioning key 2 matches the keyway on the logging tool that determines the orientation of the inclined surface of the guide tool wedge 8, so as to facilitate the positioning of the logging tool.

[0025] The milling cone 1 is pressed against the upper part of the inclined surface of the guide wedge 8. The upper end of the inclined surface of the guide wedge 8 and the positioning key 2 are located on both sides of the axis of the milling cone 1, respectively. A liquid guide tube 7 is provided inside the guide wedge 8, which connects the inner hole of the milling cone 1 and the inner cavity of the setting and anchoring device. A positioning block 4 is inserted and welded radially into the upper part of the guide wedge 8. The guide wedge 8 is secured in the arc-shaped dovetail groove set in the lower part of the milling cone 1 by the positioning block 4. A fastening screw 5 is connected radially between the positioning block 4 and the milling cone 1. A positioning screw 3 is connected radially between the upper end of the guide wedge 8 and the milling cone 1.

[0026] A secondary water hole 101 is provided radially on the milling cone 1 at the location corresponding to the positioning screw 3. A blind hole communicating with the secondary water hole 101 is provided on the positioning screw 3. When the guide wedge 8 is not disengaged from the milling cone 1, the positioning screw 3 blocks the secondary water hole 101. When the guide wedge 8 is disengaged from the milling cone 1, that is, after the positioning screw 3 is sheared, the inner hole of the milling cone 1 communicates with the outside through the secondary water hole 101 and the blind hole of the positioning screw 3.

[0027] A milling cone head 6 is threadedly connected to the lower end of the milling cone 1. The milling cone head 6 has a nozzle hole that communicates with the inner hole of the milling cone 1. The upper end of the liquid guide tube 7 extends from the upper part of the inclined surface of the guide wedge 8 and is inserted into the nozzle hole. The guide wedge 8 is provided with a T-shaped opening 801 below the milling cone head 6 to facilitate retrieval after side drilling is completed.

[0028] The wellbore wall support device includes a plunger sleeve 12 and a support slip 9. Inside the plunger sleeve 12, there is a plunger 13 and an upper limit tube 14 that are connected to each other. The upper end of the plunger sleeve 12 is fixedly connected to the lower end of the guide wedge 8 by a thread. The lower end of the plunger sleeve 12 is fixedly connected to the cylinder liner 21 of the setting and anchoring device by a core connector 15. The two ends of the outer edge of the core connector 15 are respectively connected to the plunger sleeve 12 and the cylinder liner 21 by a thread. The two ends of the center hole of the core connector 15 are respectively fixedly connected to the lower end of the upper limit tube 14 and the upper end of the center tube 16 of the setting and anchoring device by a thread.

[0029] Multiple strip-shaped holes 141 are evenly distributed along the circumferential direction on the outer wall of the upper limit tube 14 to give the upper limit tube 14 a certain elasticity and to guide the drilling fluid into the plunger sleeve 12 to push the plunger 13 upward. The support slip 9 is a wedge shape that is thin at the top and thick at the bottom and is fixed in the wedge-shaped groove 802 located at the lower end of the guide wedge 8 by shear screws 10. The support slip 9 is aligned with the center line of the inclined surface of the guide wedge 8 and the lower end is inserted into the plunger sleeve 12 and rests against the top surface of the plunger 13. A jet tube 11 is sealed and inserted between the center hole of the plunger 13 and the guide wedge 8. The inner hole of the upper end of the jet tube 11 is inserted into the lower end of the fluid guide tube 7.

[0030] The center hole of the plunger 13 is movably connected to the upper limit tube 14 through a fine tooth sawtooth thread, and the tip of the fine tooth sawtooth thread at the upper end of the upper limit tube 14 faces upward, so that the plunger 13 will not retract after jumping and moving upward under the push of the drilling fluid, thereby ensuring that the support slip 9 is firmly supported.

[0031] A rectangular notch is provided at the upper end of the plunger sleeve 12 corresponding to the support slip 9. The lower end of the support slip 9 is inserted into the plunger sleeve 12 through the rectangular notch, and the outer edge is provided with locking teeth. The outer edge of the plunger 13 is in sliding clearance fit with the plunger sleeve 12, and a sealing ring is provided between the outer edge of the plunger 13 and the plunger sleeve 12.

[0032] The setting and anchoring device includes a cylinder liner 21 fixed to the lower end of the core connector 15. Inside the cylinder liner 21 are a hollow conical body 19, a central tube 16, a lower limiting tube 20, and a setting slip 17. A ball seat 22 with an internal setting edge is fixed to the lower end of the cylinder liner 21. A setting steel ball 23, which is engaged with the setting edge, is located inside the ball seat 22. The lower end of the lower limiting tube 20 is threadedly connected to the central hole of the ball seat 22, and the upper part of the lower limiting tube 20 is connected to the conical body 19. The cone 19 is movably connected by a fine-tooth sawtooth thread, and the sawtooth thread tip on the lower limit tube 20 faces upward, so that after the drilling fluid enters the annular cavity below the cone 19 in the cylinder liner 21, it can push the cone 19 to slide upward on the lower limit tube 20; the lower end of the central tube 16 is fitted into the central hole of the cone 19 with a clearance fit, and sealing rings are provided between the central tube 16 and the cone 19 and between the lower end of the cone 19 and the cylinder liner 21 respectively;

[0033] The conical body 19 has a smaller outer diameter at the top and a larger outer diameter at the bottom, with its lower part slidingly fitted with the cylinder liner 21. Multiple axially arranged strip-shaped holes 201 are evenly distributed on the outer wall of the lower limiting tube 20 for introducing drilling fluid into the annular cavity located below the conical body 19 within the cylinder liner 21. The setting slips 17 consist of multiple alternating longitudinal and radial slips, which are evenly connected to the upper edge of the conical body's outer edge via shear screws 18. The inner walls of the longitudinal and radial slips are arc-shaped conical surfaces that engage with the outer conical surface of the conical body 19, allowing them to extend from the outer wall of the cylinder liner 21 under the push of the conical body 19, thus achieving longitudinal and radial setting and positioning of the guide vane. In this embodiment, there are two longitudinal slips and two radial slips. A rectangular opening is provided on the outer wall of the cylinder liner 21 for each slip. The radial slips and longitudinal slips are respectively embedded in the corresponding rectangular openings, so that the radial slips and longitudinal slips can be extended out of the outer wall of the cylinder liner 21 under the upward compression of the conical body 19.

[0034] The specific operating steps for performing the task are as follows:

[0035] 1. Connect the sidetracking tool to the drill string via the milling cone 1 and lower it to the predetermined position in the well. For sidetracking wells requiring directional drilling, directly lower the logging tool. Place the logging tool on the positioning key 2 via the keyway of the logging tool guide to begin the directional operation. After completing the orientation of the guide wedge 8, remove the logging tool (wireless logging tools do not need to be removed). Connect the angular drill pipe or top drive via the drill string to start the pump and pressurize.

[0036] 2. After the pump is started and pressurized, the high-pressure drilling fluid passes through the milling cone 1, the fluid guide pipe 7, the jet pipe 11, the upper limit pipe 14, the core connector 15, the center pipe 16, and the inner hole of the lower limit pipe 20 in sequence, reaching the setting steel ball 23 in the ball seat 22 to start pressurization, so that the drill string is filled with high-pressure drilling fluid. The drilling fluid enters the plunger sleeve 12 through the strip hole 141 and the strip hole 201 respectively, located between the plunger 13 and the core connector 15, and in the cylinder liner located between the cone body 19 and the ball seat 22. At this time, since there is only one support slip 9 on the plunger 13, the resistance of the plunger 13 pushing the support slip 9 to shear the shear screw 10 is small. Therefore, the drilling fluid pushes the plunger 13 and the upper limit pipe 14 to "slip" upward, so that the plunger 13 first pushes the support slip 9 to shear the shear screw 10 and squeeze it out between the guide wedge 8 and the well wall.

[0037] As the drilling fluid pressure continues to rise, the plunger 13 pushes the support slips upward, allowing the inclined back of the guide wedge 8 to press tightly against the well wall. Simultaneously, the drilling fluid entering the cylinder liner pushes the cone 19 to squeeze the setting slips. When the drilling fluid pressure reaches the point where the cone 19 pushes the setting slips 17 to shear the shear screw 18, the cone 19 begins to rise and "slips" with the lower limit tube 20, thus shearing the shear screw 18. The cone 19 continues to rise until the radial and longitudinal slips are squeezed out of the cylinder liner and locked onto the well wall. When the pump pressure reaches the predetermined value, the pump is stopped and the pressure is stabilized for 30 seconds to complete the setting of the guide wedge.

[0038] 3. After depressurization, rotate the drill bit forward. The drill bit drives the milling cone 1 to rotate and shear off the fastening screw 5 and the positioning screw 3, thereby opening the auxiliary water hole 101. At the same time, the arc-shaped dovetail groove on the milling cone disengages from the positioning block 4. Continue to rotate the drill bit so that the fluid guide tube 7 is twisted off at the outlet of the milling cone nozzle hole, and the nozzle hole naturally forms the milling cone 1 nozzle. At this time, the guide wedge 8 and the milling cone 1 are completely disengaged, and the pump can be restarted to circulate the drilling fluid. Rotate the drill bit and apply drilling pressure to perform window side drilling.

[0039] During the window opening process, if the nozzle hole of milling cone 1 becomes blocked by formation or soil, a portion of the drilling fluid will be released through the auxiliary water hole 101, thus preventing pump blockage. After window opening is completed, milling cone 1 is pulled out, and then the drill bit is lowered to proceed with subsequent sidetracking operations. Since the guide wedge is only subjected to pressure and torque during the entire window opening and sidetracking process, the circumferential and longitudinal positions of the guide wedge can be fixed by the support slips, radial slips, and longitudinal slips, ensuring the smooth completion of sidetracking.

[0040] 4. After the side drilling is completed, if the side drilling tool needs to be retrieved, it can be retrieved using a retrieval tool. For example, a special retrieval hook can be used. When the retrieval hook hooks onto the T-shaped opening 801 on the guide wedge 8, it is lifted. Because the wedge-shaped groove on the guide wedge 8 is shallow at the top and deep at the bottom, lifting the guide wedge 8 can smoothly release the support slip 9. During the release process, the support slip 9 can force the plunger 13 to slip against the upper limit tube 14, achieving full release of the guide wedge 8 and the support slip 9. At the same time, the guide wedge 8 pulls the cylinder liner 21 and ball seat 22 upward through the plunger sleeve 12 and core connector 15. 22 pushes the lower limit tube 20 to slide within the conical body 19, causing it to "slip". Meanwhile, the cylinder liner 21 drives the setting slip 17 upward. Since the small end of the conical body 19 is on top, the longitudinal and radial slips slide upward towards the small end of the conical body 19, thereby loosening the longitudinal and radial slips stuck on the well wall and releasing them. After releasing them, the guide wedge 8, along with the well wall-adhesive device and the setting anchoring device, can be completely removed, realizing the recovery of the side-drilling tool. After recovery, the main components can be reused after simple processing.

[0041] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A retrievable, well-wall-integrated hydraulic side-drilling tool, comprising a hollow milling cone, a guide wedge, and a setting and anchoring device connected in sequence, characterized in that: in A wellbore-adhesive device is connected between the guide wedge and the setting and anchoring device. The wellbore-adhesive device includes a plunger sleeve and a support slip. Inside the plunger sleeve, there is a plunger and an upper limit tube that are connected to each other. The upper end of the plunger sleeve is fixedly connected to the guide wedge, and the lower end is fixedly connected to the cylinder sleeve of the setting and anchoring device through a core connector. The two ends of the central hole of the core connector are fixedly connected to the lower end of the upper limit tube and the upper end of the central tube of the setting and anchoring device, respectively. Multiple strip-shaped holes are evenly distributed on the outer wall of the upper limit tube for introducing drilling fluid into the plunger sleeve to push the plunger upward. The support slip is wedge-shaped and fixed in the wedge-shaped groove at the lower end of the guide wedge with a shear screw. The center line of the inclined surface of the support slip is aligned with the center line of the guide wedge, and the lower end is inserted into the plunger sleeve and rests against the top surface of the plunger. A jet tube is inserted between the center hole of the plunger and the guide wedge. The plunger is connected to the upper limit tube by a fine-tooth sawtooth thread, and the fine-tooth sawtooth thread tip at the upper end of the upper limit tube faces upward, so that the plunger will not retract after jumping and moving upward under the push of the drilling fluid, thereby ensuring that the support slip is firmly supported. A rectangular notch is provided at the upper end of the plunger sleeve corresponding to the support slip. The lower end of the support slip is inserted into the plunger sleeve through the rectangular notch and has locking teeth on its outer edge.

2. The retrievable, well-wall-mounted integrated hydraulic side-drilling tool according to claim 1, characterized in that: The outer edge of the plunger slides with the plunger sleeve with a clearance fit, and a sealing ring is provided between the outer edge of the plunger and the plunger sleeve.

3. The retrievable, well-wall-integrated hydraulic side-drilling tool according to claim 1 or 2, characterized in that: The guide wedge has a T-shaped opening to facilitate hooking and retrieving the guide wedge.

4. The retrievable, well-wall-mounted integrated hydraulic side-drilling tool according to claim 3, characterized in that: The setting and anchoring device includes a cylinder liner, inside which are a conical body, a central tube, a lower limit tube, and setting slips; at the lower end of the cylinder liner, there is a ball seat with an inner setting slip edge, and a setting steel ball is provided inside the ball seat. The lower end of the lower limit tube is fixedly connected to the ball seat, and the upper part of the lower limit tube is movably connected to the conical body through a fine thread, so that after the drilling fluid enters the annular cavity located below the conical body in the cylinder liner, it can push the conical body upward.

5. The retrievable, well-wall-mounted integrated hydraulic side-drilling tool according to claim 4, characterized in that: The seat slips are divided into multiple alternating longitudinal slips and radial slips, which are evenly connected to the upper part of the outer edge of the conical body along the circumferential direction by shear screws. They are used to extend from the outer wall of the cylinder liner under the push of the conical body to realize the longitudinal and radial positioning of the guide.

6. The retrievable, well-wall-integrated hydraulic side-drilling tool according to claim 4, characterized in that: The lower end of the central tube is sealed and inserted into the conical body.

7. The retrievable, wall-mounted, integrated hydraulic side-drilling tool according to any one of claims 4-6, characterized in that: The outer diameter of the cone is smaller at the top and larger at the bottom.

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