A side-tracking well liner hanger cementing device

Abstract

The present application relates to the technical field of tail pipe hanger, and provides a side drilling well tail pipe hanger cementing device, which comprises an upper joint, a body and a lower joint connected in sequence, the body is sealingly connected with an expansion sleeve on the outer periphery, a hydraulic cavity is formed between the expansion sleeve and the body, the body is provided with an upper and lower distributed liquid inlet hole groove and a liquid outlet hole groove, the cementing device further comprises an expansion seat and a guide rod, the guide rod is movably arranged on the body in the axial direction, and the expansion seat is movably arranged on the guide rod; the expansion seat can move downward to extrude the inner peripheral wall of the expansion sleeve, so that the expansion sleeve is connected to the outer sleeve; the expansion seat can move upward with the guide rod to block the liquid outlet hole groove. Through the above technical scheme, the expansion seat continuously extrudes the expansion sleeve while blocking the liquid outlet hole groove, thereby solving the technical problems that the expansion seat cannot continuously extrude the expansion sleeve to strengthen the connection between the expansion sleeve and the outer sleeve, and the liquid outlet hole groove is not blocked, which makes it difficult to avoid material leakage.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of tailpipe hanger, in particular, to a side drilling well tailpipe hanger cementing device. BACKGROUND

[0002] The tailpipe hanger is a downhole tool for suspending the tailpipe in the upper casing string. Through the tailpipe hanger, tailpipe cementing can be achieved, the weight of the casing in the deep well can be reduced in one-time downhole operation, the load of the drilling rig lifting system can be improved during casing lowering, and the flow resistance of the cement slurry injection can be reduced, which is conducive to safe construction. At the same time, through the tailpipe tieback, the problem of affecting drilling operation due to wear of the upper casing can be solved. In addition, the use of tailpipe hanger cementing technology can also reduce the casing usage and save the drilling cost.

[0003] Through retrieval, the existing patent (publication number CN117090527A) discloses a closed hydraulic tailpipe hanger. The expansion seat is pressed down by the well killing fluid, so that the expansion seat slides down along the outer wall of the guide rod. The expansion seat in the movement process extrudes and expands the expansion sleeve, so that the expansion sleeve is tightly fixed with the inner wall of the second connecting pipe.

[0004] However, in the above-mentioned scheme, the expansion seat will finally reset, and after resetting, it will not extrude the expansion sleeve again, which is not conducive to the continuous close connection between the expansion sleeve and the upper casing located outside the expansion sleeve. In addition, the drainage hole groove is not plugged, and it is difficult to avoid material leakage from the drainage hole groove by relying on its own inclined setting.

[0005] Therefore, it is necessary to improve the above-mentioned structure to solve the above-mentioned problems. SUMMARY

[0006] In order to overcome the above-mentioned defects, the present application provides a side drilling well tailpipe hanger cementing device, which solves the technical problems that the expansion seat in the prior art cannot continuously extrude the expansion sleeve to strengthen the connection between the expansion sleeve and the external casing, and the drainage hole groove is not plugged, which makes it difficult to avoid material leakage.

[0007] According to one aspect, at least one embodiment of the present application provides a side drilling well tailpipe hanger cementing device, which comprises an upper joint, a body and a lower joint connected in sequence, and a pressure building assembly arranged in the body and sliding along the axial direction of the body. The body is provided with an internal passage, and the sealing sleeve on the outer periphery of the body is provided with an expansion sleeve. A hydraulic chamber is formed between the expansion sleeve and the body. The body is provided with a liquid inlet hole groove and a liquid outlet hole groove for connecting the internal passage and the hydraulic chamber. The liquid inlet hole groove is located above the liquid outlet hole groove. The pressure building assembly is used to move up and down to open or close the liquid inlet hole groove,

[0008] The hydraulic cavity is further provided with an expansion seat and a guide rod, the guide rod extends along the axial direction of the device body and is movably arranged on the device body and connected with the pressure building assembly through a linkage assembly, the expansion seat is sleeved on the guide rod, when the liquid inlet hole groove is in the open state, the hydraulic cavity enters liquid, the expansion seat can move downward along the guide rod under the action of liquid pressure and push the expansion sleeve, so that the expansion sleeve is connected to the outer sleeve; after the expansion seat moves downward below the liquid outlet hole groove, the guide rod can also move upward with the guide rod under the action of the linkage assembly, so as to block the liquid outlet hole groove by means of the expansion seat.

[0009] For example, the side tracking well tailpipe hanging cementing device provided by at least one embodiment of the present disclosure has an outwardly protruding limiting ring part at the lower part of the guide rod, the limiting ring part is located below the liquid outlet hole groove, the limiting ring part can limit the downward movement range of the expansion seat and drive the expansion seat to move upward synchronously with the guide rod.

[0010] For example, the side tracking well tailpipe hanging cementing device provided by at least one embodiment of the present disclosure has a pressure building assembly including a ball plug and an annular clamping seat, the annular clamping seat is slidably arranged in the internal passage along the axial direction of the device body, the annular clamping seat has a spherical surface in contact with the peripheral wall of the ball plug, the annular clamping seat can move downward under the pressing action of the ball plug to open the liquid inlet hole groove.

[0011] The device body is fixedly connected with an annular base, the annular base is provided with an elastic member one, the upper end of the elastic member one can act on the annular clamping seat to elastically push the annular clamping seat to move upward to close the liquid inlet hole groove after the ball plug moves out of the annular clamping seat.

[0012] For example, the side tracking well tailpipe hanging cementing device provided by at least one embodiment of the present disclosure has an axially extending tooth part one on the peripheral wall of the guide rod, the annular clamping seat has a mounting hole radially penetrating and arranged adjacent to the liquid inlet hole groove, the mounting hole is used for mounting the linkage assembly, the linkage assembly includes a plug rod, a reversing gear, a driving rod and an elastic member two, the reversing gear is rotatably arranged in the mounting hole, the plug rod and the driving rod are movably arranged in the mounting hole, the plug rod has a tooth part two, the driving rod has a tooth part three, the plug rod and the driving rod are respectively located on the upper and lower sides of the reversing gear and are in meshing connection with the reversing gear, the driving rod can retract into the mounting hole under the extrusion action of the ball plug and drive the reversing gear to rotate, one end of the elastic member two acts on the plug rod and the other end acts on the inner wall of the mounting hole, so as to provide a force for the tooth part two to approach and mesh with the tooth part one.

[0013] When the ball falls into the annular clamping seat, the insertion rod is configured to move away from the guide rod under the rotation of the reversing gear to separate the tooth part two and the tooth part one; when the ball moves out of the annular clamping seat, the insertion rod is configured to move to the side close to the guide rod under the action of the second elastic piece to the tooth part two and the tooth part one, so as to drive the guide rod and the expansion seat to move up synchronously through the annular clamping seat, and to block the drainage hole groove by means of the expansion seat.

[0014] For example, the side tracking well liner hanging cementing device provided by at least one embodiment of the present disclosure is provided with a plurality of guide rods and a plurality of linkage assemblies corresponding to the plurality of liquid inlet hole grooves.

[0015] For example, the side tracking well liner hanging cementing device provided by at least one embodiment of the present disclosure is provided with a corrugated hose in the first elastic piece, which is connected between the annular clamping seat and the annular base, and is used to isolate the first elastic piece and the internal passage.

[0016] For example, the side tracking well liner hanging cementing device provided by at least one embodiment of the present disclosure is provided with a plurality of liquid inlet hole grooves and a plurality of drainage hole grooves.

[0017] For example, the side tracking well liner hanging cementing device provided by at least one embodiment of the present disclosure is provided with a plurality of liquid inlet hole grooves along the circumference of the device body, a plurality of guide rods and a plurality of linkage assemblies distributed along the circumference of the device body, a plurality of guide rods corresponding to a plurality of liquid inlet hole grooves one by one, and a plurality of linkage assemblies corresponding to a plurality of liquid inlet hole grooves one by one.

[0018] For example, the side tracking well liner hanging cementing device provided by at least one embodiment of the present disclosure is provided with a hollow upper joint and a hollow lower joint, which are in communication with the internal passage.

[0019] For example, the side tracking well liner hanging cementing device provided by at least one embodiment of the present disclosure is provided with an annular groove on the inner circumferential wall of the expansion sleeve, and the expansion seat is provided with an annular recess in contact with the annular groove.

[0020] The embodiment of the present disclosure has the following beneficial effects:

[0021] In the present invention, by setting the liquid inlet slot and the liquid discharge slot, the communication control between the internal channel and the hydraulic chamber is realized, and the opening and closing of the liquid inlet slot by the pressure-building component is coordinated to provide a controllable pressure source for the hydraulic chamber. The expansion seat cooperates with the guide rod so that the expansion seat can not only move downward to squeeze the expansion sleeve to achieve connection with the outer sleeve, but also move upward with the guide rod to block the liquid discharge slot. The two functions are realized through different motion states of the same component, simplifying the overall structure. The setting of the hydraulic chamber provides a closed space for the movement of the expansion seat, ensures the effectiveness of pressure transmission, ensures the stability of the squeezing force of the expansion seat on the expansion sleeve, and thus ensures the reliability of the connection between the expansion sleeve and the outer sleeve. At the same time, the blocking of the liquid discharge slot avoids liquid leakage in the hydraulic chamber and maintains the stability of the connection between the expansion sleeve and the outer sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0023] Figure 1 A schematic structural diagram of a cementing device according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic cross-sectional view of a cementing device in an embodiment of the present invention;

[0025] Figure 3 for Figure 2 A schematic structural diagram of the embodiment of the expansion seat after the expansion sleeve is squeezed and hung;

[0026] Figure 4 for Figure 3 Schematic diagram of the structure with the enlarged part A in the middle;

[0027] Figure 5 for Figure 3 The structural diagram of the enlarged part B in the middle;

[0028] Figure 6 for Figure 3 A schematic structural diagram of the expansion seat blocking the drainage hole groove after the hanging is completed in the embodiment;

[0029] Figure 7 for Figure 6 Schematic diagram of the structure with the enlarged local C in the middle;

[0030] Figure 8 for Figure 6 A schematic structural diagram of the upper half of the embodiment;

[0031] Figure 9 For Figure 8 Structure diagram of partial D amplification;

[0032] Figure 10 For Figure 8 Structure diagram of partial E amplification;

[0033] In the figure: 1, upper joint; 2, body; 21, liquid inlet hole groove; 22, liquid outlet hole groove; 23, internal passage; 24, expansion seat; 25, guide rod; 251, limiting ring part; 252, tooth part one; 253, clamping groove; 26, limiting groove; 261, elastic fin; 3, lower joint; 4, pressure building assembly; 41, ball plug; 42, annular clamping seat; 421, mounting hole; 422, annular recess; 43, elastic member one; 44, annular base; 45, corrugated hose; 5, expansion sleeve; 51, annular groove; 6, hydraulic chamber; 7, linkage assembly; 71, insertion rod; 711, tooth part two; 72, reversing gear; 73, driving rod; 731, tooth part three; 74, elastic member two. DETAILED DESCRIPTION

[0034] The application will be further described below in conjunction with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the application, and are not a limitation on the application.

[0035] In order to make the drawing simple, only the parts related to the application are shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this text, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0036] In this text, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0038] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, in the description of the present application, the terms "first", "second", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] As Figures 1-10As shown, it shows a side tracking well liner hanging cementing device in an embodiment of the present application, in some examples, the upper joint 1, the body 2, the lower joint 3 and the pressure building assembly 4 are connected in turn in the side tracking well liner hanging cementing device, the body 2 is sealingly connected with the expansion sleeve 5 outside the periphery, and the hydraulic cavity 6 is formed between the two. The liquid inlet hole groove 21 and the liquid outlet hole groove 22 on the body 2 are distributed up and down, respectively, to communicate the internal passage 23 of the body 2 with the hydraulic cavity 6, and the pressure building assembly 4 controls the opening or closure of the liquid inlet hole groove 21. The expansion seat 24 and the guide rod 25 are arranged in the hydraulic cavity 6. The guide rod 25 is arranged on the body 2 in the axial direction, and the expansion seat 24 is sleeved on the guide rod 25. When the pressure building assembly 4 opens the liquid inlet hole groove 21, the liquid in the internal passage 23 enters the hydraulic cavity 6 through the liquid inlet hole groove 21, the pressure in the hydraulic cavity 6 rises to push the expansion seat 24 to move downward, and the downward moving expansion seat 24 extrudes the inner wall of the expansion sleeve 5, so that the expansion sleeve 5 expands outward and is connected to the outer sleeve; after the expansion seat 24 moves downward through the liquid outlet hole groove 22, the liquid is discharged from the liquid outlet hole groove 22, the sitting and hanging are completed, then the guide rod 25 is moved upward, the expansion seat 24 moves upward synchronously, and the liquid outlet hole groove 22 is blocked again, so that the material in the internal passage 23 does not leak into the hydraulic cavity 6 to corrode and damage the expansion sleeve 5. The design principle is to adjust the pressure change in the hydraulic cavity 6 through the pressure building assembly 4, drive the expansion seat 24 to move, realize the connection of the expansion sleeve 5 and the outer sleeve and the blocking of the liquid outlet hole groove 22, and the working process is to connect the expansion sleeve 5 by first entering the liquid through the liquid inlet hole groove 21 to make the expansion seat 24 move downward, and then to block the liquid outlet hole groove 22 by moving the expansion seat 24 upward through the guide rod 25.

[0041] The advantages of such arrangement are: by arranging the liquid inlet hole groove 21 and the liquid outlet hole groove 22, the communication control between the internal passage 23 and the hydraulic cavity 6 is realized, the opening and closure of the liquid inlet hole groove 21 by the pressure building assembly 4 provides a controllable pressure source for the hydraulic cavity 6. The cooperation of the expansion seat 24 and the guide rod 25 enables the expansion seat 24 to move downward to extrude the expansion sleeve 5 to realize the connection with the outer sleeve, and to move upward with the guide rod 25 to block the liquid outlet hole groove 22, so that the two functions are realized by different movement states of the same component, simplifying the overall structure. The arrangement of the hydraulic cavity 6 provides a closed space for the movement of the expansion seat 24, ensures the effectiveness of pressure transmission, ensures the stability of the extrusion force of the expansion seat 24 on the expansion sleeve 5, and further ensures the reliability of the connection between the expansion sleeve 5 and the outer sleeve, and the blocking of the liquid outlet hole groove 22 avoids the leakage of the liquid in the hydraulic cavity 6, maintaining the stability of the connection between the expansion sleeve 5 and the outer sleeve.

[0042] As Figures 1-10As shown in FIG. 1, which shows a side-tracking well liner hanging cementing device in an embodiment of the present application, in some examples, the bottom of the guide rod 25 is provided with a limiting ring part 251, which is located below the drainage hole groove 22. When the expansion seat 24 moves downward, the limiting ring part 251 blocks the expansion seat 24 from continuing to move downward, limiting the downward movement range of the expansion seat 24; when the guide rod 25 moves upward, the limiting ring part 251 moves upward synchronously, driving the expansion seat 24, which is sleeved on the guide rod 25, to move upward. The design principle is to use the position setting of the limiting ring part 251 to mechanically limit the downward movement of the expansion seat 24, and at the same time, through the contact between the limiting ring part 251 and the expansion seat 24, the upward movement of the guide rod 25 is transmitted to the expansion seat 24, and the working process is that the expansion seat 24 stops after moving downward to contact the limiting ring part 251, and the expansion seat 24 is driven to move upward by the limiting ring part 251 when the guide rod 25 moves upward.

[0043] The advantage of such a setting is that the limiting ring part 251 limits the downward movement range of the expansion seat 24, and at the same time, the limiting ring part 251 transmits the upward movement of the guide rod 25 to the expansion seat 24, ensuring that the expansion seat 24 can reliably follow the guide rod 25 to move upward to block the drainage hole groove 22, without the need for additional transmission structure, enhancing the synchronization and reliability of the movement of the expansion seat 24, and further ensuring the effectiveness of the drainage hole groove 22 blocking.

[0044] As shown in FIG. 1, which shows a side-tracking well liner hanging cementing device in an embodiment of the present application, in some examples, the bottom of the guide rod 25 is provided with a limiting ring part 251, which is located below the drainage hole groove 22. When the expansion seat 24 moves downward, the limiting ring part 251 blocks the expansion seat 24 from continuing to move downward, limiting the downward movement range of the expansion seat 24; when the guide rod 25 moves upward, the limiting ring part 251 moves upward synchronously, driving the expansion seat 24, which is sleeved on the guide rod 25, to move upward. The design principle is to use the position setting of the limiting ring part 251 to mechanically limit the downward movement of the expansion seat 24, and at the same time, through the contact between the limiting ring part 251 and the expansion seat 24, the upward movement of the guide rod 25 is transmitted to the expansion seat 24, and the working process is that the expansion seat 24 stops after moving downward to contact the limiting ring part 251, and the expansion seat 24 is driven to move upward by the limiting ring part 251 when the guide rod 25 moves upward. Figures 1-10 As shown in FIG. 1, which shows a side-tracking well liner hanging cementing device in an embodiment of the present application, in some examples, the bottom of the guide rod 25 is provided with a limiting ring part 251, which is located below the drainage hole groove 22. When the expansion seat 24 moves downward, the limiting ring part 251 blocks the expansion seat 24 from continuing to move downward, limiting the downward movement range of the expansion seat 24; when the guide rod 25 moves upward, the limiting ring part 251 moves upward synchronously, driving the expansion seat 24, which is sleeved on the guide rod 25, to move upward. The design principle is to use the position setting of the limiting ring part 251 to mechanically limit the downward movement of the expansion seat 24, and at the same time, through the contact between the limiting ring part 251 and the expansion seat 24, the upward movement of the guide rod 25 is transmitted to the expansion seat 24, and the working process is that the expansion seat 24 stops after moving downward to contact the limiting ring part 251, and the expansion seat 24 is driven to move upward by the limiting ring part 251 when the guide rod 25 moves upward.

[0045] The advantage of such arrangement is that the spherical surface of the annular holder 42 matches the outer contour of the ball plug 41, ensuring the sealing effect after the ball plug 41 is attached to the annular holder 42, avoiding liquid leakage from the gap between them, and ensuring that the pressure in the internal channel 23 can be effectively transmitted to the hydraulic cavity 6. The elastic member one 43 provides a restoring force for the annular holder 42, so that the annular holder 42 can automatically close the liquid inlet hole groove 21 after the ball plug 41 is removed, without the need for additional operation, simplifying the operation process. The annular base 44 provides stable support for the elastic member one 43, ensuring stable output of the elastic force of the elastic member one 43, making the movement of the annular holder 42 more reliable, and thus ensuring the stability of the opening and closing of the liquid inlet hole groove 21.

[0046] As shown in Figures 1-10 Fig. 1 shows a side tracking well liner hanging cementing device in an embodiment of the present application. In some examples, the guide rod 25 has an axially extending tooth portion one 252, the annular holder 42 of the pressure building assembly 4 has a radially through mounting hole 421, the mounting hole 421 is provided with a linkage assembly 7, the linkage assembly 7 includes a plug rod 71, a reversing gear 72, a driving rod 73 and an elastic member two 74, the reversing gear 72 is rotatably arranged in the mounting hole 421, the plug rod 71 and the driving rod 73 are radially movably arranged in the mounting hole 421, and are located on both sides of the reversing gear 72 and meshed with the reversing gear 72, and the elastic member two 74 acts on the plug rod 71 and the inner wall of the mounting hole 421 at both ends. Initially, the elastic member one 43 pushes the annular holder 42 upward, the elastic member two 74 pushes the plug rod 71 to extend, and the tooth portion two 711 meshes with the tooth portion one 252; after the ball is thrown, the ball plug 41 presses the annular holder 42 and the driving rod 73, the tooth portion three 731 of the driving rod 73 meshes with the reversing gear 72, driving the plug rod 71 to retract, the tooth portion two 711 is disengaged from the tooth portion one 252, and the liquid inlet hole groove 21 is opened; after the ball plug 41 is removed, the elastic member one 43 pushes the annular holder 42 upward, the elastic member two 74 pushes the plug rod 71 to extend, and the tooth portion two 711 reengages with the tooth portion one 252, the annular holder 42 drives the guide rod 25 to move upward through the cooperation of the plug rod 71 and the tooth portion of the guide rod 25, and then the expansion seat 24 moves upward to block the liquid outlet hole groove 22. The design principle is to use gear transmission to realize the reverse motion of the plug rod 71 and the driving rod 73, and to transfer the upward movement of the annular holder 42 to the guide rod 25 through the meshing of the tooth portions, and the working process is that the plug rod 71 is disengaged from the meshing by the driving rod 73 when the ball is thrown, and the plug rod 71 meshes with the guide rod 25 and drives it to move upward after the ball is removed.

[0047] The advantage of such arrangement is that the insertion rod 71 and the driving rod 73 are matched by the reversing gear 72 to realize the reverse movement of both, so that the downward pressing action of the ball plug 41 can be synchronized to release the engagement of the insertion rod 71 and the guiding rod 25, avoiding the hindering of the guiding rod 25 to the downward movement of the annular clamping seat 42. The elastic member two 74 ensures that the insertion rod 71 can be reliably engaged with the toothed portion one 252 of the guiding rod 25 without external force, so that the guiding rod 25 can be synchronously moved upward by the insertion rod 71 when the annular clamping seat 42 moves upward, realizing the linkage of the annular clamping seat 42 and the guiding rod 25, ensuring that the expansion seat 24 can accurately move upward to block the drainage hole groove 22, and the cooperation of multiple components enhances the synergy of the structure and the reliability of the movement.

[0048] As shown in Figures 1-10 , which shows a side tracking well liner hanging cementing device in an embodiment of the present application. In some examples, the device body 2 has an axially extending limiting groove 26, the top end of the guiding rod 25 extends into the limiting groove 26, and the inner wall of the limiting groove 26 is provided with an elastic fin 261 extending obliquely upward to the axial center side. The top end of the guiding rod 25 has a clamping groove 253 corresponding to the elastic fin 261. When the guiding rod 25 moves upward, the top end pushes the elastic fin 261 to deform. When the guiding rod 25 continues to move upward to the position where the clamping groove 253 corresponds to the elastic fin 261, the elastic fin 261 is snapped into the clamping groove 253 to lock the axial position of the guiding rod 25. The design principle is to realize the axial locking of the guiding rod 25 after moving upward by the elastic deformation of the elastic fin 261 and the cooperation of the clamping groove 253. The working process is to lock by making the elastic fin 261 snap into the clamping groove 253 when the guiding rod 25 moves upward.

[0049] The advantage of such arrangement is that the cooperation of the elastic fin 261 and the clamping groove 253 can lock the axial position of the guiding rod 25 after moving upward to the predetermined position, preventing the guiding rod 25 from moving downward due to external force or hydraulic pressure change, ensuring the continuous blocking of the expansion seat 24 to the drainage hole groove 22, and avoiding the loosening of the connection between the expansion sleeve 5 and the outer sleeve caused by the downward movement of the expansion seat 24, thereby enhancing the stability of the working state of the overall structure. The limiting groove 26 provides movement space and guidance for the top end of the guiding rod 25, ensuring the stability of the upward movement of the guiding rod 25, so that the elastic fin 261 and the clamping groove 253 can be accurately matched.

[0050] As shown in Figures 1-10Figure 2 shows a sidetrack liner suspension cementing device according to one embodiment of the present invention. In some examples, the bellows 45 of the pressure-building assembly 4 is connected between the annular holder 42 and the annular base 44, enclosing the elastic member 1 43. As the annular holder 42 moves up and down, the bellows 45 expands and contracts with it, consistently isolating the elastic member 1 43 from the liquid in the internal passage 23. The design principle utilizes the elasticity of the bellows 45 to isolate the elastic member 1 43 from the liquid without affecting the movement of the annular holder 42. The process is as follows: the movement of the annular holder 42 drives the bellows 45 to expand and contract, continuously maintaining isolation of the elastic member 1 43.

[0051] This arrangement offers the following advantages: the corrugated hose 45 isolates the elastic member 1 43 from the liquid in the internal passage 23, preventing impurities in the liquid from entering the elastic member 1 43 and potentially affecting its elastic properties or causing it to become stuck. This ensures that the elastic member 1 43 can consistently output elastic force, ensuring the proper resetting of the annular retainer 42. Furthermore, the elasticity of the corrugated hose 45 accommodates the vertical movement of the annular retainer 42 without affecting the normal operation of the pressure-building assembly 4, extending the service life of the elastic member 1 43 and improving the reliability of the pressure-building assembly 4.

[0052] like Figures 1-10 Figure 2 shows a sidetracking liner suspension cementing device according to one embodiment of the present invention. In some examples, multiple inlet slots 21 and outlet slots 22 are circumferentially distributed along the body 2. Multiple inlet slots 21 simultaneously direct liquid from the internal channel 23 into the hydraulic chamber 6, while multiple outlet slots 22 simultaneously connect the hydraulic chamber 6 with the internal channel 23. The design principle is to increase the number of liquid circulation paths through the multiple circumferentially distributed slots. Liquid rapidly enters the hydraulic chamber 6 through the multiple inlet slots 21 or is discharged through the multiple outlet slots 22.

[0053] The advantages of this arrangement are: the multiple liquid inlet slots 21 accelerate the rate at which liquid enters the hydraulic chamber 6, rapidly increasing the pressure within the hydraulic chamber 6, shortening the response time for the downward movement of the expansion seat 24, and improving the efficiency of the connection between the expansion sleeve 5 and the outer casing. The multiple liquid drainage slots 22 increase the number of channels for liquid discharge, allowing the liquid in the hydraulic chamber 6 to be quickly discharged, preventing poor drainage from affecting the movement of the expansion seat 24. Furthermore, the circumferential distribution of the multiple slots ensures more uniform pressure across the hydraulic chamber 6, ensuring more uniform compression of the expansion sleeve 5 by the expansion seat 24 and enhancing the strength of the connection between the expansion sleeve 5 and the outer casing.

[0054] like Figures 1-10As shown, a sidetracking liner suspension cementing device according to one embodiment of the present invention is illustrated. In some examples, multiple guide rods 25 and pressure-building assemblies 4 are correspondingly distributed along the circumference of the device body 2. Each pressure-building assembly 4 independently controls the corresponding guide rod 25, and the expansion seats 24 on the multiple guide rods 25 jointly act on the inner circumferential wall of the expansion casing 5. The design principle is to achieve multi-point action on the expansion casing 5 through multiple groups of circumferentially distributed guide rods 25 and pressure-building assemblies 4. The working process is that multiple pressure-building assemblies 4 are activated synchronously, driving the corresponding guide rods 25 and expansion seats 24 to move, jointly completing the connection of the expansion casing 5 and the sealing of the drainage hole 22.

[0055] The advantages of such a setting are: the circumferential distribution of multiple guide rods 25 and pressure-building components 4 makes the squeezing force of the expansion seat 24 on the expansion sleeve 5 more uniform along the circumference, avoiding excessive or insufficient local force on the expansion sleeve 5, and ensuring that the connection between the expansion sleeve 5 and the outer sleeve is tighter and more stable. The setting of multiple groups of components enhances the redundancy of the structure. Even if individual components fail, the remaining components can still maintain the basic functions of the device, thereby improving the reliability of the device. At the same time, multiple pressure-building components 4 work synchronously, making the movement of the guide rods 25 more synchronous, ensuring that the corresponding drainage hole slots 22 can be blocked at the same time when the expansion seat 24 moves upward, thereby improving the coordination of the overall structure.

[0056] like Figures 1-10 FIG. 1 shows a sidetrack liner suspension cementing device according to one embodiment of the present invention. In some examples, an annular groove 51 is formed on the top of the inner circumferential wall of the expansion casing 5, and an annular recess 422 corresponding to the annular groove 51 is formed on the expansion seat 24. In the initial state, the expansion seat 24 is located at the top of the expansion casing 5, and the annular recess 422 is aligned with the annular groove 51, providing a positioning mechanism for the expansion seat 24 and the expansion casing 5.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A side-tracking well liner hanger cementing device, comprising an upper joint (1), a body (2) and a lower joint (3) connected in sequence, and a pressure building assembly (4) arranged in the body (2) along the axial direction of the body (2), characterized in that, The body (2) is internally provided with an internal passage (23), and an expansion sleeve (5) is sealingly sleeved on the outer periphery of the body (2), and a hydraulic cavity (6) is formed between the expansion sleeve (5) and the body (2), the body (2) is provided with a liquid inlet hole groove (21) and a liquid outlet hole groove (22) for communicating the internal passage (23) and the hydraulic cavity (6), the liquid inlet hole groove (21) is located above the liquid outlet hole groove (22), and the pressure building assembly (4) is used for moving up and down to open or close the liquid inlet hole groove (21), Wherein, the hydraulic cavity (6) is further provided with an expansion seat (24) and a guide rod (25), the guide rod (25) extends along the axial direction of the body (2) and is movably arranged on the body (2) and connected with the pressure building assembly (4) through a linkage assembly (7), the expansion seat (24) is sleeved on the guide rod (25), when the liquid inlet hole groove (21) is in an open state, the hydraulic cavity (6) is filled with liquid, the expansion seat (24) can move downward along the guide rod (25) under the action of liquid pressure and push the expansion sleeve (5), so that the expansion sleeve (5) is connected to the outer sleeve; after the expansion seat (24) moves downward to below the liquid outlet hole groove (22), the guide rod (25) can also move upward with the guide rod (25) under the action of the linkage assembly (7), so as to block the liquid outlet hole groove (22) by means of the expansion seat (24).

2. A sidetracking liner hanger cementing system as defined in claim 1, wherein, The lower part of the guide rod (25) has a limiting ring part (251) protruding outward, the limiting ring part (251) is located below the liquid outlet hole groove (22), and the limiting ring part (251) can limit the downward movement amplitude of the expansion seat (24) and drive the expansion seat (24) to move upward synchronously with the guide rod (25).

3. A sidetracking liner hanger cementing system as defined in claim 1, wherein, The pressure building assembly (4) comprises a ball plug (41) and an annular clamping seat (42), the annular clamping seat (42) is slidably arranged in the internal passage (23) along the axial direction of the body (2), the annular clamping seat (42) has a spherical surface in contact with the peripheral wall of the ball plug (41), and the annular clamping seat (42) can move downward under the pressing action of the ball plug (41) to open the liquid inlet hole groove (21); The body (2) is internally fixedly connected with an annular base (44), the annular base (44) is provided with an elastic member (43), and the upper end of the elastic member (43) can act on the annular clamping seat (42) to elastically push the annular clamping seat (42) to move upward to close the liquid inlet hole groove (21) after the ball plug (41) moves out of the annular clamping seat (42).

4. A sidetracking liner hanger cementing system as defined in claim 3, wherein, The circumferential wall of the guide rod (25) has an axially extending tooth portion one (252), the annular clamping seat (42) has a mounting hole (421) radially penetrating and arranged adjacent to the liquid inlet hole groove (21), the mounting hole (421) is used for mounting the linkage assembly (7), the linkage assembly (7) comprises an insertion rod (71), a reversing gear (72), a driving rod (73) and an elastic member two (74), the reversing gear (72) is rotationally arranged in the mounting hole (421), the insertion rod (71) and the driving rod (73) are movably arranged in the mounting hole (421), the insertion rod (71) has a tooth portion two (711), the driving rod (73) has a tooth portion three (731), the insertion rod (71) and the driving rod (73) are respectively located on the upper and lower sides of the reversing gear (72) and are in mesh with the reversing gear (72), the driving rod (73) can be retracted into the mounting hole (421) under the extrusion of the ball plug (41) and drive the reversing gear (72) to rotate, one end of the elastic member two (74) acts on the insertion rod (71) and the other end acts on the inner wall of the mounting hole (421), for providing the force for the tooth portion two (711) to approach and mesh with the tooth portion one (252); When the ball plug (41) falls into the annular clamping seat (42), the insertion rod (71) is configured to move away from the guide rod (25) under the rotation of the reversing gear (72) to separate the tooth portion two (711) and the tooth portion one (252); when the ball plug (41) moves out of the annular clamping seat (42), the insertion rod (71) is configured to move to the side close to the guide rod (25) under the action of the elastic member two (74) to make the tooth portion two (711) and the tooth portion one (252) clamped, so as to drive the guide rod (25) and the expansion seat (24) to move upward synchronously through the annular clamping seat (42), and block the liquid outlet hole groove (22) by means of the expansion seat (24).

5. A sidetracking liner hanger cementing system as defined in claim 1, wherein, The top and bottom of the hydraulic chamber (6) are provided with limiting grooves (26) corresponding to the upper and lower ends of the guide rod (25) in a sliding manner, the inner wall of the limiting groove (26) located at the upper part is provided with an elastic fin (261) extending obliquely upwards to the side of the shaft center of the guide rod (25), the circumferential wall of the guide rod (25) has a clamping groove (253) corresponding to the elastic fin (261), the elastic fin (261) is configured to be clamped into the clamping groove (253) after the guide rod (25) moves upward to lock the axial position of the guide rod (25).

6. A sidetracking liner hanger cementing system as defined in claim 3, wherein, The elastic member one (43) is further provided with a corrugated hose (45), the corrugated hose (45) is connected between the annular clamping seat (42) and the annular base (44), for isolating the elastic member one (43) and the internal passage (23).

7. A sidetracking liner hanger cementing system as defined in claim 1, wherein, The liquid inlet hole groove (21) and the liquid outlet hole groove (22) are both circumferentially distributed with a plurality of.

8. A sidetracking liner hanger cementing system as defined in claim 3, wherein, The inlet hole grooves (21) are arranged in plurality along the circumference of the body (2), the guide rods (25) and the linkage assemblies (7) are distributed in plurality along the circumference of the body (2), the plurality of guide rods (25) are arranged one-to-one corresponding to the plurality of inlet hole grooves (21), and the plurality of linkage assemblies (7) are arranged one-to-one corresponding to the plurality of inlet hole grooves (21).

9. A sidetracking liner hanger cementing system as defined in claim 1, wherein, The upper joint (1) and the lower joint (3) are hollow inside and communicate with the internal channel (23).

10. A sidetracking liner hanger cementing system as defined in claim 1, wherein, The inner circumferential wall of the expansion sleeve (5) has an annular groove (51) located at the top of the expansion sleeve (5), and the expansion seat (24) has an annular recess (422) in contact with the annular groove (51).

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