High-stability righting positioning device and righting positioning method

Abstract

This invention relates to the field of oil and gas field development technology, and is a highly stable centering and positioning device and method. The device includes an upper connector, a first sleeve, a second sleeve, a movable sleeve, a connecting rod centering mechanism, and a positioning module. The first sleeve is installed in the middle of the upper connector, and the second sleeve is installed at the lower end of the upper connector. A sealing ring is installed in the middle of the second sleeve, and a movable sleeve is located below the sealing ring. A first annular platform is located at the lower end of the second sleeve, and a second annular platform is located at the lower end of the movable sleeve. The upper part of the first sleeve has several first connecting holes, and a flow-blocking device is located inside the first sleeve below the first connecting holes. The second sleeve, corresponding to the position below the sealing ring, has several second connecting holes. The connecting rod centering mechanism and the positioning module are located at the lower part of the first sleeve. This invention improves the stability and durability of the positioner, and enhances the flexibility and safety of positioning operations.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development technology, and is a highly stable centering and positioning device and method. Background Technology

[0002] In the field of oil and gas exploration and development, the application of locators is very important in downhole oil and gas reserve exploration, especially in horizontal well sections in complex geological structures. The stability and durability of locators have become key factors affecting the efficiency and success rate of horizontal well stimulation.

[0003] Extreme downhole environments pose a core challenge to the stability of positioners. First, the high-pressure environment is paramount; high pressure tests the sealing and deformation resistance of the mechanical structure, and even minor leaks or deformations can lead to positioning malfunctions. Second, downhole fluid turbulence and formation variations create a continuous and unpredictable mechanical environment that easily causes loosening, wear, or fatigue fracture of precision components within the positioner. This is particularly true for traditional positioners relying on mechanical slips or spring mechanisms, significantly reducing the success rate of locking and releasing. Furthermore, complex media environments, such as high-salinity drilling fluids, corrosive gases like hydrogen sulfide, and sediment particles, increase the positioner's forward resistance, impacting positioning efficiency.

[0004] Therefore, developing a centering locator with high stability and strong adaptability is crucial for improving the overall efficiency of horizontal well stimulation operations. The problem of locator instability has become a technical challenge that oil and gas exploration and development companies urgently need to solve. Summary of the Invention

[0005] This invention provides a highly stable centering and positioning device and method, which overcomes the shortcomings of the prior art and can effectively solve the problems of poor stability and low durability of existing oil and gas field exploration and positioning devices.

[0006] One of the technical solutions of this invention is achieved through the following measures: a high-stability straightening and positioning device, comprising an upper connector, a first sleeve, a second sleeve, a movable sleeve, a connecting rod straightening mechanism, and a positioning module. A first sleeve with its lower end below it is fixedly installed on the inner side of the middle portion of the upper connector. A second sleeve located outside the first sleeve and with its lower end outside the middle portion of the first sleeve is fixedly installed on the inner side of the lower end of the upper connector. A sealing ring located at the lower end of the upper connector is installed on the outer side of the middle portion of the second sleeve. A movable sleeve with its lower end outside the lower portion of the sealing ring is provided on the outer side of the lower portion of the second sleeve. A first annular platform that contacts the first sleeve is provided on the inner side of the lower end of the second sleeve. A first annular platform that contacts the first sleeve is provided on the inner side of the lower end of the movable sleeve. The second annular platform is formed by the contact of the two sleeves. A first annular cavity is formed between the first sleeve and the second sleeve. The upper part of the first sleeve is provided with several first connecting holes that can communicate with the first annular cavity. The inner side of the first sleeve below the first connecting holes is provided with a flow-blocking device that can release the blockage under liquid pressure. A second annular cavity is formed between the second sleeve and the movable sleeve. The second sleeve below the sealing ring is provided with several second connecting holes that can communicate with the first annular cavity. The lower outer side of the first sleeve is provided with a linkage straightening mechanism that can buffer and guide the movable sleeve when it moves up and down. The lower outer side of the first sleeve below the linkage straightening mechanism is provided with a positioning module.

[0007] The following are further optimizations and / or improvements to one of the above-mentioned technical solutions:

[0008] The aforementioned linkage straightening mechanism includes a first linkage, a second linkage, a sliding block, a limiting ring, and a fixing ring. A limiting ring is provided on the outer side of the lower end of the second sleeve. A fixing ring is fixedly installed on the outer side of the lower part of the first sleeve corresponding to the position below the limiting ring. A third ring platform is provided on the outer side of the lower end of the fixing ring. At least three sliding blocks are fixedly installed at even intervals along the circumference on the lower side of the second ring platform. A linkage fixing block is fixedly installed on the upper side of the third ring platform corresponding to the position of each sliding block. A first linkage with its lower end located below it is hinged to each sliding block. A second linkage is hinged to each linkage fixing block and is horizontally arranged. The lower end of the first linkage is hinged to the middle part of the second linkage at the corresponding position.

[0009] The aforementioned linkage straightening mechanism also includes rollers, with each second linkage having a roller at its outer end.

[0010] The aforementioned linkage straightening mechanism also includes a scraper, with a scraper fixedly installed on the upper side of the outer end of the second linkage to remove mud and debris from the surface of the roller.

[0011] The aforementioned linkage straightening mechanism also includes a baffle fixing seat and a baffle. A baffle fixing seat with its lower end located below it is fixedly installed on the lower side of the middle part of the second linkage, and a baffle with its outer end located below the roller is fixedly installed on the baffle fixing seat.

[0012] The aforementioned positioning module includes positioning blocks and positioning devices. Several positioning blocks are spaced apart along the circumference on the outer side of the first sleeve, and positioning devices are respectively provided on the outer side of the positioning blocks.

[0013] The aforementioned flow-blocking device includes a rupture disc and support blocks. The first sleeve, located below the first connecting hole, is provided with several rupture discs spaced vertically and capable of being released from blockage under liquid pressure. The first sleeve, located below each rupture disc, is provided with several support blocks spaced circumferentially on its inner side.

[0014] The above also includes O-rings, with a number of O-rings spaced vertically between the upper outer side of the second sleeve and the upper inner side of the sealing ring, a number of O-rings spaced vertically between the upper outer side of the sealing ring and the upper inner side of the movable sleeve, and an O-ring between the inner side of the first ring platform and the outer side of the first sleeve.

[0015] The second technical solution of the present invention is achieved through the following measures: a highly stable positioning and alignment method, comprising:

[0016] S01, the upper connector is fixedly connected to the upper pipe string. After the high-stability straightening and positioning device is introduced into the horizontal well, the flowing medium in the horizontal well pushes the device to move, and the positioner touches the inner wall of the horizontal well to perform positioning.

[0017] S02, when the high-stability straightening and positioning device deviates from the center of the horizontal well, the flowing medium in the horizontal well flows from the upper pipe string to the upper joint and the first casing for injection pressure. After the rupture plate intercepts the flowing medium, the flowing medium enters the first annular cavity through the first connecting hole on the first casing.

[0018] S03, the medium in the first annular cavity enters the second annular cavity through the second connecting hole on the second sleeve, and the pressure of the medium in the second annular cavity pushes the moving sleeve to move towards the positioning block;

[0019] S04, the moving casing drives the sliding block to transmit power to all the first links and the corresponding second links. The outer ends of the second links are all supported by the horizontal well wall. The rollers contact the well wall surface and roll, reducing the hard collision damage between the positioner and the well wall surface, and straightening the highly stable positioning device.

[0020] This invention provides a highly stable positioning device that significantly improves positioning stability, reduces friction damage, and has good adaptability. A retractable linkage positioning mechanism, slightly larger than the positioning component, is installed behind the positioning component. Driven by the pressure of the well media flow, the linkage positioning mechanism expands to contact the well wall when the tubing string hangs naturally, thus positioning the device. Rollers on the linkage positioning mechanism reduce collisions between the positioner and the well wall, minimizing damage. A pressure-reducing buffer channel is also provided; when encountering narrowing or slit sections in the well wall, the linkage positioning mechanism retracts, facilitating the device's passage through these sections. This improves the stability and durability of the positioner, enhancing the flexibility and safety of positioning operations. Attached Figure Description

[0021] Appendix Figure 1 This is a schematic diagram of the main structure of the present invention.

[0022] Appendix Figure 2 For the appendix Figure 1 A schematic diagram of the central linkage straightening mechanism.

[0023] Appendix Figure 3 For the appendix Figure 2 A schematic diagram of the structure of the second connecting rod, roller, scraper, and baffle.

[0024] Appendix Figure 4 This is a schematic diagram of the structure of the fracture disc after it is broken according to the present invention.

[0025] The codes in the attached diagram are as follows: 1 is the upper connector, 2 is the first sleeve, 3 is the second sleeve, 4 is the movable sleeve, 5 is the connecting rod straightening mechanism, 6 is the positioning block, 7 is the first ring platform, 8 is the first ring cavity, 9 is the first connecting hole, 10 is the sealing ring, 11 is the second ring platform, 12 is the second ring cavity, 13 is the locator, 14 is the second connecting hole, 17 is the first connecting rod, 18 is the second connecting rod, 19 is the sliding block, 20 is the limiting ring, 21 is the fixing ring, 22 is the third ring platform, 23 is the connecting rod fixing block, 24 is the rupture disc, 25 is the support block, 26 is the roller, 27 is the scraper, 28 is the baffle, 29 is the O-ring seal, and 31 is the baffle fixing seat. Detailed Implementation

[0026] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0027] Unless otherwise specified, all equipment and apparatus used in this invention are existing and commonly known in the art. For ease of description, the descriptions of the relative positions of the components are based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1The orientation of the layout is determined by the direction of the map.

[0028] The present invention will be further described below with reference to embodiments:

[0029] Example 1: As shown in the attached document Figure 1 As shown, the high-stability straightening and positioning device includes an upper connector 1, a first sleeve 2, a second sleeve 3, a movable sleeve 4, a connecting rod straightening mechanism 5, and a positioning module. The first sleeve 2, with its lower end located below it, is fixedly installed on the inner side of the middle portion of the upper connector 1. The second sleeve 3, located outside the first sleeve 2 and with its lower end located outside the middle portion of the first sleeve 2, is fixedly installed on the inner side of the lower end of the upper connector 1. A sealing ring 10, located at the lower end of the upper connector 1, is installed on the outer side of the middle portion of the second sleeve 3. A movable sleeve 4, with its lower end located outside the lower portion of the second sleeve 3, is provided on the inner side of the lower end of the second sleeve 3. A first annular platform 7, in contact with the first sleeve 2, is provided on the inner side of the lower end of the second sleeve 3. A second annular platform 1, in contact with the second sleeve 3, is provided on the inner side of the lower end of the movable sleeve 4. 1. A first annular cavity 8 is formed between the first sleeve 2 and the second sleeve 3. The upper part of the first sleeve 2 is provided with several first connecting holes 9 that can communicate with the first annular cavity 8. The inner side of the first sleeve 2, corresponding to the position below the first connecting holes 9, is provided with a flow-blocking device that can release the blockage under liquid pressure. A second annular cavity 12 is formed between the second sleeve 3 and the movable sleeve 4. The second sleeve 3, corresponding to the position below the sealing ring 10, is provided with several second connecting holes 14 that can communicate between the first annular cavity 8 and the second annular cavity 12. The lower outer side of the first sleeve 2 is provided with a connecting rod straightening mechanism 5 that can achieve buffering guidance when the movable sleeve 4 moves up and down. The lower outer side of the first sleeve 2, corresponding to the position below the connecting rod straightening mechanism 5, is provided with a positioning module.

[0030] This invention is primarily applicable to the location exploration of horizontal wells (where the medium inside the well is liquid).

[0031] This invention provides a highly stable positioning device that significantly improves positioning stability and reduces frictional damage. The device also exhibits good adaptability to complex environments. A retractable linkage positioning mechanism 5, with a maximum support height slightly higher than the positioning module, is located behind the positioning module. Driven by the pressure of the well media flow, the linkage positioning mechanism 5 expands circumferentially and elastically contacts the well wall when the tubing hangs naturally, smoothly positioning the device and reducing hard collision damage between the positioning module and the well wall. Simultaneously, a pressure-reducing buffer channel (flow-stopping device) is provided. When encountering a narrowing or slit in the well wall, the linkage positioning mechanism 5 retracts, facilitating the device's passage through narrow or slit sections, thus improving the stability and durability of the positioning module.

[0032] As required, the upper connector 1 and the sealing ring 10 are both casing equipment in the field of oil and gas field development technology. The connection between the upper connector 1 and the first casing 2, and between the upper connector 1 and the second casing 3, can all be threaded connections, which can ensure the effective sealing of the medium flowing in the pipe cavity and avoid leakage of the medium in the pipe cavity. The sealing is crucial for maintaining the pressure and normal operation of the pipe cavity system.

[0033] The movable casing 4 slides up and down relative to the sealing ring 10 (at the same time, the second ring platform 11 slides up and down relative to the second casing 3). The movable casing 4 can be driven by the connecting rod straightening mechanism 5. The connecting rod straightening mechanism 5 straightens the invention and reduces the friction force of the invention moving in the horizontal well, so that the invention can smoothly follow the tubing string to move in the horizontal well. This flexibility enhances the adaptability of the invention in complex environments and improves positioning efficiency.

[0034] Example 2: As an optimization of the above examples, as shown in the appendix Figure 1 , 2 As shown, the linkage straightening mechanism 5 includes a first link 17, a second link 18, a sliding block 19, a limiting ring 20, and a fixing ring 21. A limiting ring 20 is provided on the outer side of the lower end of the second sleeve 3. A fixing ring 21 is fixedly installed on the outer side of the lower part of the first sleeve 2 corresponding to the lower position of the limiting ring 20. A third ring platform 22 is provided on the outer side of the lower end of the fixing ring 21. At least three sliding blocks 19 are fixedly installed at even intervals along the circumference on the lower side of the second ring platform 11. A linkage fixing block 23 is fixedly installed on the upper side of the third ring platform 22 corresponding to the position of each sliding block 19. A first link 17 with its lower end located below it is hinged to each sliding block 19. A second link 18 with a horizontal arrangement is hinged to each linkage fixing block 23. The lower end of the first link 17 is hinged to the middle part of the second link 18 at the corresponding position.

[0035] As required, both the limiting ring 20 and the fixing ring 21 are casing equipment in the field of oil and gas field development technology.

[0036] The linkage mechanism formed between the first link 17, the second link 18, the sliding block 19 and the fixed ring 21, with the sliding block 19 driven by the first link 17, the first link 17 being the driving member and the second link 18 being the driven member, the second link 18 swings up and down relative to the axis of the first sleeve 2 under the drive of the first link 17, and several second links 18 perform circumferential contraction or circumferential expansion relative to the axis of the first sleeve 2, forming the linkage straightening mechanism 5.

[0037] The sliding block 19 and the limiting ring 20 enable the present invention to automatically adjust its radial offset position when it encounters pipe wall joints or tilting, allowing the present invention to pass smoothly through narrow areas.

[0038] Among them, the limiting ring 20 restricts the sliding block 19 to move downward to the maximum stroke, so that the top of all the second connecting rods 18 swings to the radial position of the first casing 2, and the top of the second connecting rods 18 fully contacts the inner wall of the horizontal well, achieving a stronger straightening effect and effectively preventing the invention from sliding or getting stuck in the well, thus improving the safety and reliability of the positioning operation.

[0039] Example 3: As an optimization of the above examples, as shown in the appendix Figure 2 , 3 As shown, the linkage straightening mechanism 5 also includes rollers 23, and each second link 18 has a roller 23 at its outer end.

[0040] Depending on the requirements, the roller 23 can also be a ball or a roller. The roller 23 rolls in contact with the well wall. The rotational contact reduces the frictional resistance caused by the offset and collision with the wall when the invention moves forward in the well, thereby reducing the wear of the positioning module and improving the service life and positioning efficiency of the invention.

[0041] Example 4: As an optimization of the above embodiments, as shown in the appendix Figure 2 , 3 As shown, the linkage straightening mechanism 5 also includes a scraper 27, which is fixedly installed on the upper side of the outer end of the second linkage 18 to scrape off mud and debris from the surface of the roller 23.

[0042] As needed, the scraper 27 can effectively remove sand and gravel debris adhering to the surface of the roller 23, ensuring that the roller 23 rotates normally.

[0043] Example 5: As an optimization of the above embodiments, as shown in the appendix Figure 2 , 3 As shown, the linkage straightening mechanism 5 also includes a baffle fixing seat 31 and a baffle 28. The baffle fixing seat 31 with its lower end located below it is fixedly installed on the lower side of the middle part of the second linkage 18, and the baffle 28 with its outer end located below the roller 23 is fixedly installed on the baffle fixing seat 31.

[0044] As needed, neither the scraper 27 nor the baffle 28 obstructs the rotation of the roller 23, and ensures that the roller 23 can effectively contact the well wall surface when the second connecting rod 18 is radially spread along the outside of the first casing 2.

[0045] As needed, the maximum distance that the outer side of the roller 23 at the top of the second connecting rod 18 is spread relative to the axis of the first casing 2 is greater than the distance that the outer side of the locator 13 is relative to the axis of the first casing 2, so as to ensure that the outer side of any roller 23 has priority in contacting the inner wall of the horizontal well before the locator 13, thereby reducing the hard collision damage between the locator 13 and the inner wall of the horizontal well.

[0046] Example 6: As an optimization of the above embodiments, as shown in the appendix Figure 1 , 4As shown, the positioning module includes positioning blocks 6 and locators 13. Several positioning blocks 6 are arranged at intervals along the circumference on the outer side of the first sleeve 2, and locators 13 are arranged on the outer side of the positioning blocks 6 respectively.

[0047] As needed, such as Figure 4 As shown, the protective plate is located on the underside of the roller 23 (between the roller 23 and the positioner 13), which provides protection for both the roller 23 and the positioner 13.

[0048] Example 7: As an optimization of the above embodiments, as shown in the appendix Figure 1 , 4 As shown, the interception device includes a rupture disc 24 and a support block 25. The first sleeve 2, located below the first connecting hole 9, is provided with several rupture discs 24 that are spaced vertically and can be unblocked under liquid pressure. The first sleeve 2, located below each rupture disc 24, is provided with several support blocks 25 spaced circumferentially on its inner side.

[0049] As required, as attached Figure 1 As shown, the rupture disc 24 effectively restricts the flow of medium within the first casing 2, preventing excessive medium pressure from causing impact damage to the invention. When the locator 13 detects proximity to the target position (abnormal reduction in the cross-section of the wellbore channel), and the pressure within the first casing 2 exceeds the flow-blocking strength of the rupture disc 24, as shown in the attached diagram... Figure 4 As shown, the high-pressure medium impacts the rupture disc 24 until it breaks, the pressure in the first annular cavity 8 and the second annular cavity 12 is released (instability), and the second connecting rod 18 swings upward and is in a contracted state, ensuring that the invention can smoothly pass through the abnormally narrowed well section, enhancing the flexibility and safety of the positioning operation.

[0050] Example 8: As an optimization of the above embodiments, as shown in the appendix Figure 1 , 4 As shown, the high-stability straightening and positioning device also includes O-rings 29. Several O-rings 29 with vertical spacing are provided between the upper outer side of the second sleeve 3 and the upper inner side of the sealing ring 10. Several O-rings 29 with vertical spacing are provided between the upper outer side of the sealing ring 10 and the upper inner side of the movable sleeve 4. An O-ring 29 is provided between the inner side of the first ring platform 7 and the outer side of the first sleeve 2.

[0051] As needed, the O-ring 29 can enhance the sealing between the upper outer side of the second sleeve 3 and the upper inner side of the sealing ring 10, and can also enhance the sealing between the upper outer side of the sealing ring 10 and the upper inner side of the movable sleeve 4, and ensure that the movable sleeve 4 slides up and down relative to the sealing ring 10.

[0052] Unless otherwise specified, all equipment and devices used in this invention are existing and commonly known in the art.

[0053] Example 9: As attached Figure 1 , 2 As shown in Figures 3 and 4, this highly stable uprighting and positioning method includes:

[0054] S01, the upper connector 1 is fixedly connected to the upper pipe string. After the high-stability straightening and positioning device is introduced into the horizontal well, the flowing medium in the horizontal well pushes the device to move, and the positioner 13 touches the inner wall of the horizontal well for positioning.

[0055] S02, when the high-stability straightening and positioning device deviates from the center of the horizontal well, the flowing medium in the horizontal well flows from the upper pipe string to the upper connector 1 and the first casing 2 for injection pressure. After the rupture plate 24 cuts off the flowing medium, the flowing medium enters the first annular cavity 8 through the first connecting hole 9 on the first casing 2.

[0056] S03, the medium in the first annular cavity 8 enters the second annular cavity 12 through the second connecting hole 14 on the second sleeve 3, and the pressure of the medium in the second annular cavity 12 pushes the moving sleeve 4 to move towards the positioning block 6.

[0057] S04, the moving sleeve 4 drives the sliding block 19 to transmit power to all the first connecting rods 17 and the corresponding second connecting rods 18. The outer ends of the second connecting rods 18 are all supported by the horizontal well wall. The rollers 23 roll in contact with the well wall surface, reducing the hard collision damage between the positioner 13 and the well wall surface, and straightening the high-stability straightening positioning device.

[0058] Among them, the high-stability straightening and positioning device is deviated from the center of the horizontal well. When the positioner 13 touches the well wall, the roller 23 contacts the inner wall of the horizontal well and rolls, which reduces the forward resistance of the invention in the horizontal well and reduces the hard collision damage between the positioner 13 and the inner wall of the horizontal well.

[0059] The present invention has the following advantages:

[0060] (1) Effective sealing and support: The connection between the upper connector 1 and the first sleeve 2, and between the upper connector 1 and the second sleeve 3, can all be threaded connections, which can ensure the effective sealing of the medium flowing in the pipe cavity and avoid leakage of the medium in the pipe cavity. The sealing is crucial for maintaining the pressure and normal operation of the pipe cavity system.

[0061] (2) Flexible mobility: The movable casing 4 slides up and down relative to the sealing ring 10 (at the same time, the second ring platform 11 slides up and down relative to the second casing 3). The movable casing 4 can be driven by the connecting rod straightening mechanism 5. The connecting rod straightening mechanism 5 straightens the invention and reduces the friction force of the invention moving in the horizontal well, so that the invention can smoothly follow the pipe string to move in the horizontal well. This flexibility enhances the adaptability of the invention in complex environments.

[0062] (3) Enhanced straightening effect: The linkage mechanism formed between the first connecting rod 17, the second connecting rod 18, the sliding block 19, and the fixed ring 21 can fully contact the well wall for support, providing a stronger straightening effect. This invention can effectively prevent the danger of slippage or jamming in the well, and improve the safety and reliability of positioning operations.

[0063] (4) Automatic adjustment and adaptability: The limiting ring 20 restricts the sliding block 19 to move downward to the maximum stroke, so that the top of all the second connecting rods 18 swings to the radial position of the first casing 2, and the roller 23 contacts the well wall and rolls. The rotational contact reduces the frictional resistance caused by the offset and collision with the wall when the invention moves forward in the well, thereby reducing the wear of the invention and improving the service life and positioning efficiency of the invention.

[0064] (5) Pressure control and safety release: The rupture disc 24 can effectively restrict the flow of medium in the first casing 2, avoiding excessive medium pressure from causing impact damage to the invention. When the locator 13 detects that it is close to the target position (the cross-section of the well wall channel is abnormally reduced), when the pressure in the first casing 2 is higher than the interception strength of the rupture disc 24, the high-pressure medium impacts the rupture disc 24 until it breaks, the pressure in the first annular cavity 8 and the second annular cavity 12 is released (instability), and the second connecting rod 18 swings upward and is in a contracted state, ensuring that the invention can pass smoothly through the abnormally reduced well section, and enhancing the flexibility and safety of the positioning operation.

[0065] (6) Reduce friction and wear: The connecting rod straightening mechanism 5 transforms hard friction contact into rotational contact, which can significantly reduce the frictional resistance between the present invention and the well wall during the movement of the well, thereby reducing wear and improving the service life and efficiency of the equipment.

[0066] In summary, the above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A highly stable uprighting and positioning device, characterized in that... The system includes an upper connector, a first sleeve, a second sleeve, a movable sleeve, a connecting rod straightening mechanism, and a positioning module. A first sleeve with its lower end below it is fixedly installed on the inner side of the middle portion of the upper connector. A second sleeve located outside the first sleeve and with its lower end outside the middle portion of the first sleeve is fixedly installed on the inner side of the lower end of the upper connector. A sealing ring located at the lower end of the upper connector is installed on the outer side of the middle portion of the second sleeve. A movable sleeve with its lower end outside the lower portion of the sealing ring is located on the outer side of the lower portion of the second sleeve. A first annular platform that contacts the first sleeve is located on the inner side of the lower end of the second sleeve. A second annular platform that contacts the second sleeve is located on the inner side of the lower end of the movable sleeve. A first annular cavity is formed between the first sleeve and the second sleeve. The upper part of the first sleeve has several first connecting holes that communicate with the first annular cavity. A flow-blocking device is provided on the inner side of the first sleeve below the first connecting holes, which can release the seal under liquid pressure. A second annular cavity is formed between the second sleeve and the movable sleeve. Several second connecting holes are provided on the second sleeve below the sealing ring, which allow communication between the first and second annular cavities. A linkage straightening mechanism is provided on the lower outer side of the first sleeve, which provides buffering guidance when the movable sleeve moves up and down. A linkage straightening mechanism is provided on the lower outer side of the first sleeve below the linkage straightening mechanism. A positioning module is provided on the side; the linkage straightening mechanism includes a first linkage, a second linkage, sliding blocks, a limiting ring, and a fixing ring. A limiting ring is provided on the outer side of the lower end of the second sleeve, and a fixing ring is fixedly installed on the outer side of the lower part of the first sleeve corresponding to the lower side of the limiting ring. A third ring platform is provided on the outer side of the lower end of the fixing ring; at least three sliding blocks are fixedly installed at circumferential intervals on the lower side of the second ring platform, and a linkage fixing block is fixedly installed on the upper side of the third ring platform corresponding to the position of each sliding block. A first linkage with its lower end located below it is hinged to each sliding block, and a second linkage horizontally arranged is hinged to each linkage fixing block. The lower end is hinged to the middle of the corresponding second link; the link straightening mechanism also includes rollers, and each second link has a roller at its outer end; the link straightening mechanism also includes a scraper, and a scraper capable of scraping off mud and debris from the roller surface is fixedly installed on the upper side of the outer end of the second link; the link straightening mechanism also includes a baffle fixing seat and a baffle, and a baffle fixing seat with its lower end located below it is fixedly installed on the lower side of the middle of the second link, and a baffle with its outer end located below the roller is fixedly installed on the baffle fixing seat; the positioning module includes positioning blocks and positioners, and several positioning blocks are spaced around the circumference on the outer side of the first sleeve, and positioners are respectively provided on the outer side of the positioning blocks.

2. The high-stability straightening and positioning device according to claim 1, characterized in that... The flow-blocking device includes a rupture disc and a support block. The first sleeve, located below the first connecting hole, is provided with several rupture discs that are spaced vertically and can be released from the blockage under liquid pressure. The first sleeve, located below each rupture disc, is provided with several support blocks spaced circumferentially on its inner side.

3. The high-stability straightening and positioning device according to claim 2, characterized in that... It also includes O-rings, with several O-rings spaced vertically between the upper outer side of the second sleeve and the upper inner side of the sealing ring, several O-rings spaced vertically between the upper outer side of the sealing ring and the upper inner side of the movable sleeve, and an O-ring between the inner side of the first ring platform and the outer side of the first sleeve.

4. A method for positioning a high-stability centering and positioning device according to any one of claims 1 to 3 within a horizontal well, characterized in that... include: S01, the upper connector is fixedly connected to the upper pipe string. After the high-stability straightening and positioning device is introduced into the horizontal well, the flowing medium in the horizontal well pushes the device to move, and the positioner touches the inner wall of the horizontal well to perform positioning. S02, when the high-stability straightening and positioning device deviates from the center of the horizontal well, the flowing medium in the horizontal well flows from the upper pipe string to the upper joint and the first casing for injection pressure. After the rupture plate intercepts the flowing medium, the flowing medium enters the first annular cavity through the first connecting hole on the first casing. S03, the medium in the first annular cavity enters the second annular cavity through the second connecting hole on the second sleeve, and the pressure of the medium in the second annular cavity pushes the moving sleeve to move towards the positioning block; S04, the moving casing drives the sliding block to transmit power to all the first links and the corresponding second links. The outer ends of the second links are all supported by the horizontal well wall. The rollers contact the well wall surface and roll, reducing the hard collision damage between the positioner and the well wall surface, and straightening the highly stable positioning device.

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