Monolithic high temperature and high pressure liner hanger and pipe string cementing system incorporating same

Abstract

The application discloses a whole high-temperature and high-pressure resistant liner hanger, which comprises a setting system and a running tool. The setting system comprises a setting system body, a back-connection cylinder, a cone sleeve and a slip which are sleeved outside the setting system body, and the outer taper surface of the cone sleeve is matched with the inner taper surface of the slip. The running tool comprises a driving mechanism body and a movable element which is located in the driving mechanism body and can slide in the axial direction, a guide groove is arranged on the side wall of the driving mechanism body, a clamping block is connected to the movable element, the clamping block is slidably connected in the guide groove, and a part of the clamping block extends beyond the outer side surface of the driving mechanism body to abut against the back-connection cylinder. The liner hanger can not only effectively solve the problem of "premature suspension failure" of the liner hanger, but also meet the liner cementing demand under harsh conditions such as high pressure and high temperature, and reduce the risk in the liner running and the whole operation process. The application further discloses a pipe string type cementing system comprising the whole high-temperature and high-pressure resistant liner hanger.

Description

Technical Field

[0001] This invention belongs to the field of cementing and completion tool technology, and particularly relates to an integral high-temperature and high-pressure tailpipe hanger and a tubular cementing system including the same. Background Technology

[0002] Tail-end cementing via a tail-end hanger reduces the weight of casing run into deep wells per operation, improves the load on the drilling rig's hoisting system during casing run-in, reduces the flow resistance of the cement slurry, and promotes safer construction. Tail-end reconnection can resolve drilling operations affected by upper casing wear; furthermore, tail-end suspension cementing technology reduces casing usage and saves drilling costs.

[0003] In existing technologies, the most commonly used hanger is the hydraulic tailpipe hanger. Its mounting system generally consists of multiple layers, including the body, hydraulic cylinder, and piston, and achieves tailpipe mounting by pressurizing the pipe. However, due to the sealing of the multi-layered structure and the openness of the hydraulic cylinder's pressure transmission channels, the pump pressure may easily exceed the hydraulic cylinder's starting pressure when the pump is started for circulation before the on-site mounting operation, leading to "premature mounting failure." Especially under high temperature and high pressure conditions, the seals are prone to failure or the mounting system body may deform, affecting the overall sealing of the wellbore and increasing the risks during tailpipe lowering and the entire operation.

[0004] Therefore, based on these issues, providing an integrated high-temperature and high-pressure resistant tailpipe hanger that effectively solves the problem of "premature suspension failure" of the hanger, meets the tailpipe cementing requirements under harsh conditions such as high pressure and high temperature, and reduces the risks during tailpipe running and the entire operation process is of great practical significance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated high-temperature and high-pressure resistant tailpipe hanger that can effectively solve the problem of "premature suspension failure" of the hanger, meet the tailpipe cementing requirements under harsh conditions such as high pressure and high temperature, and reduce the risks of tailpipe running and the entire operation process.

[0006] According to a first aspect of the present invention, an integral high-temperature and high-pressure tailpipe hanger is provided, comprising a mounting system and an insertion tool. The mounting system includes: a mounting system body; a return sleeve, a conical sleeve, and a slip sleeve sleeved on the body of the mounting system along a first direction, wherein the outer conical surface of the conical sleeve engages with the inner conical surface of the slip sleeve; the insertion tool includes: a drive mechanism, the drive mechanism including a drive mechanism body and a movable member located within the drive mechanism body and slidable relative to the drive mechanism body along an axial direction, wherein a guide groove extending along an axial direction and penetrating the side wall of the drive mechanism body is provided, and the movable member is connected to a slip sleeve. The block, wherein the locking block is slidably engaged in the guide groove and a portion thereof extends beyond the outer surface of the drive mechanism body; wherein the return tube of the mounting system is located outside the drive mechanism body, before the drive mechanism is activated, the movable member is in a locked state, the return tube abuts against the portion of the locking block extending beyond the outer surface of the drive mechanism body, after the drive mechanism is activated, the movable member slides in the axial direction, pushing the locking block to move along the guide groove, causing the return tube and the cone sleeve to move relative to the mounting system body in the first direction, so that the slip opens and the tailpipe hanger is mounted.

[0007] According to one embodiment of the present invention, before sitting and hanging, the cone sleeve is connected to the main body of the sitting and hanging system by a first shear pin, and during the sitting and hanging process, the first shear pin is cut off.

[0008] According to one embodiment of the present invention, the seat hanging system further includes a push rod and a push rod fixing sleeve. The push rod fixing sleeve is sleeved on the body of the seat hanging system and is located downstream of the slip in the first direction. One end of the push rod is connected to the slip, and the other end is connected to the push rod fixing sleeve.

[0009] According to one embodiment of the present invention, before sitting and hanging, the push rod fixing sleeve is connected to the main body of the sitting and hanging system by a second shear pin, and during the sitting and hanging process, the second shear pin is cut off.

[0010] According to one embodiment of the present invention, the seat-hanging system body includes a main body section and a thickened section, and a stepped surface is formed between the main body section and the thickened section. Before being seated, the push rod fixing sleeve abuts against the stepped surface, and after being seated, the push rod fixing sleeve is spaced apart from the stepped surface.

[0011] According to one embodiment of the present invention, multiple push rods are provided, and the multiple push rods are evenly distributed around the circumference of the seat hanging system body. The push rod fixing sleeve is provided with push rod grooves for accommodating the push rods, and the number of push rod grooves corresponds to the number of push rods.

[0012] According to one embodiment of the invention, the chuck includes a first portion containing the inner conical surface and a second portion connected to the first portion, the outer surface of the second portion being inwardly tapered relative to the outer surface of the first portion, thereby forming a stepped surface between the first portion and the second portion, the push rod abutting against the stepped surface.

[0013] According to one embodiment of the present invention, the seat hanging system includes a connecting sleeve and a lower connecting sleeve sequentially sleeved on the body of the seat hanging system along the first direction and located between the return sleeve and the cone sleeve. One end of the connecting sleeve is connected to the return sleeve, and the opposite end of the connecting sleeve is connected to one end of the lower connecting sleeve. The end face of the opposite end of the lower connecting sleeve abuts against the cone sleeve.

[0014] According to one embodiment of the present invention, the seat hanging system further includes a retaining spring disposed between the connecting sleeve and the lower connecting sleeve, the retaining spring being sleeved on the outer wall of the seat hanging system body and partially engaged with the inner wall of the lower connecting sleeve.

[0015] According to one embodiment of the present invention, the inner wall of the retaining ring is provided with a first reverse tooth, and the outer wall of the seat hanging system body is provided with a second reverse tooth that cooperates with the first reverse tooth.

[0016] According to one embodiment of the present invention, the seat-hanging system includes a reverse-threaded connector sleeved within the return sleeve, one end of the inner wall of the reverse-threaded connector being connected to the seat-hanging system body; the feeding tool includes a reverse-threaded sleeve that mates with the reverse-threaded connector; before seat-hanging, the reverse-threaded sleeve is locked to the reverse-threaded connector to lock the feeding tool to the seat-hanging system; when it is necessary to remove the feeding tool, the connection between the reverse-threaded sleeve and the reverse-threaded connector is released to release the feeding tool.

[0017] According to one embodiment of the present invention, the feeding tool includes a central tube, and the inner wall of one end of the drive mechanism body is connected to the central tube through a connecting module; the connecting module includes: a connecting joint, a connecting sleeve, and a torque shaft, one end of the drive mechanism body is fixedly connected to one end of the connecting sleeve through the connecting joint, the other end of the connecting sleeve is fixedly connected to one end of the torque shaft through a coupling, and the other end of the torque shaft is connected to the central tube.

[0018] According to one embodiment of the present invention, the reverse threaded sleeve, the spring and the thrust bearing are sequentially mounted on the torque shaft along a second direction, the second direction being opposite to the first direction.

[0019] According to one embodiment of the present invention, the drive mechanism includes a retractable split ball seat, the movable member being connected to the retractable split ball seat, the retractable split ball seat retracting to form a ball seat in the initial state.

[0020] According to one embodiment of the present invention, before the drive mechanism is started, the movable part is connected to the drive mechanism body by a third shear pin, and after the drive mechanism is started, the third shear pin is cut off.

[0021] According to one embodiment of the present invention, a sealing element is provided below the third shear pin between the movable member and the inner wall of the drive mechanism body.

[0022] According to one embodiment of the present invention, the feeding tool includes a lifting section connected to the drive mechanism body and a conversion joint connected to the lifting section, wherein the conversion joint is used to connect to the feeding rotating rod; the seat hanging system includes a straightening sleeve sleeved on the body of the seat hanging system.

[0023] According to one embodiment of the present invention, the mounting system remains in the well after the downhole construction operation, and the delivery tool is brought out of the wellhead after the downhole construction operation.

[0024] According to a second aspect of the present invention, a tubular cementing system is provided, comprising the integral high-temperature and high-pressure tailpipe hanger described above.

[0025] By adopting the above technical solution, the present invention has at least the following beneficial effects:

[0026] The integrated high-temperature and high-pressure tailpipe hanger provided by this invention adopts an integrated design for the seat-hanging system body. The hydraulic cylinder, pressure transmission hole and internal rubber sealing structure of the hydraulic seat-hanging system in the conventional hydraulic tailpipe hanger are removed from the seat-hanging system body. This not only eliminates the risk of pressure leakage and improves the overall temperature and pressure resistance, but also prevents the hanger from "premature suspension failure".

[0027] The integrated high-temperature and high-pressure tailpipe hanger provided by this invention has an independent drive mechanism designed on the delivery tool. After the setting is completed and the delivery tool (converter joint, lifting sub, hydraulically driven setting mechanism body, retractable split ball seat, movable sleeve, locking block, connecting joint, connecting sleeve, coupling, torsion shaft, central tube, etc.) is removed, what remains in the well is a complete integrated structure without any pressure leakage risk, ensuring the integrity of the wellbore.

[0028] The integrated high-temperature and high-pressure tailpipe hanger provided by this invention features a drive mechanism with a split ball seat and movable sleeve structure. It has no differential pressure surface, and will not actuate prematurely regardless of the circulating pressure. It only actuates under pressure after the setting ball is inserted into the tube string. Compared to conventional piston-hydraulic cylinder structures (which have pressure transmission and relief holes, and if the circulating pump pressure exceeds the cylinder shear pin pressure before insertion or mounting, the drive mechanism actuates prematurely, leading to premature mounting), this design provides better protection against premature hanger failure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural diagram of the initial state of the integral high temperature and high pressure tailpipe hanger provided in the embodiment of the present invention. For clarity, the tailpipe hanger is shown in three sections: (A) is the upper part of the integral high temperature and high pressure tailpipe hanger, (B) is the middle part of the integral high temperature and high pressure tailpipe hanger, and (C) is the lower part of the integral high temperature and high pressure tailpipe hanger.

[0031] Figure 2 This is a structural diagram of the integral high-temperature and high-pressure tailpipe hanger provided in the embodiment of the present invention after it is mounted. For clarity, the tailpipe hanger is shown in three sections: (A) is the upper part of the integral high-temperature and high-pressure tailpipe hanger, (B) is the middle part of the integral high-temperature and high-pressure tailpipe hanger, and (C) is the lower part of the integral high-temperature and high-pressure tailpipe hanger. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0033] First, it should be noted that the specific structure, features, and advantages of the present invention will be described in detail below by way of examples. However, all descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, can still be arbitrarily combined or deleted among these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned herein. Additionally, for the sake of simplifying the drawings, the same or similar technical features may be indicated only in one place in the same drawing.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0035] The following will combine Figure 1-2 The embodiments of the present invention will be described in detail below.

[0036] This embodiment provides an integral high-temperature and high-pressure tailpipe hanger, including a mounting system and a delivery tool. The mounting system and the delivery tool are initially connected together. After downhole operations, they are separated, with the mounting system remaining in the well and the delivery tool being pulled out of the wellhead.

[0037] The seat-mounting system includes a conical sleeve 27, a slip 28, a push rod 30, and a reconnecting sleeve 14, a reverse-threaded connector 20, a connecting sleeve 22, a seat-mounting system body 24, a lower connecting sleeve 25, and a push rod fixing sleeve 31, all of which are tubular structures. The lower inner wall of the reverse-threaded connector 20 is fixedly connected to the outer wall of the seat-mounting system body 24 via threads. The reconnecting sleeve 14, connecting sleeve 22, lower connecting sleeve 25, conical sleeve 27, and slip 28 are sequentially fitted onto the reverse-threaded connector 20 and the outer wall of the seat-mounting system body 24 from top to bottom, and the reconnecting sleeve 14, connecting sleeve 22, and lower connecting sleeve 25 are sequentially fixedly connected. One end face of the conical sleeve 27 (the upper end face in the figure) contacts the other end face of the lower connecting sleeve 25 (the lower end face in the figure), and before seat mounting, this end is connected to the seat-mounting system body 24 via a first shear pin 26. The outer conical surface of the conical sleeve 27 mates with the inner conical surface of the slip. Before being seated, the push rod fixing sleeve 31 is fixed to the outer wall of the seat-hanging system body 24 below the slip 28 by the second shear pin 32, and its downward movement is restricted by the stepped structure on the outer wall of the seat-hanging system body 24. Specifically, the seat-hanging system body 24 includes a main body section and a thickened section, with a stepped surface formed between the main body section and the thickened section. Before being seated, the push rod fixing sleeve 31 abuts against this stepped surface; after being seated, the push rod fixing sleeve 31 is spaced apart from the stepped surface. The two ends of the push rod 30 are fixedly connected to the slip 28 and the push rod fixing sleeve 31, respectively. Specifically, in this embodiment, the two ends of the push rod 30 are fixedly connected to the slip 28 and the push rod fixing sleeve 31, respectively, by screws. In addition, in this embodiment, the slip includes an upper part and a lower part containing an inner conical surface. The outer surface of the lower part tapers inward relative to the outer surface of the upper part, thereby forming a stepped surface between the upper and lower parts. The push rod 30 abuts against the stepped surface to more reliably maintain the position of the slip.

[0038] The feeding tool includes a drive mechanism and a central tube 3. The drive mechanism includes a sleeve-shaped drive mechanism body 3 and a movable component located within the drive mechanism body 3 and slidable relative to the drive mechanism body 3 in the axial direction. In this embodiment, the movable component takes the form of a movable sleeve 8. Several guide grooves 301 extending axially and penetrating the sidewall are provided on the lower end sidewall of the drive mechanism body 3. The end of the drive mechanism body 3 is fixedly connected to the central tube 21 via a connecting module, and the upper inner wall of the reverse-clamping connector 20 is fixedly connected to the connecting module. A locking block 9 is installed within the guide grooves 301; the inner side of the locking block 9 is fixedly connected to the movable sleeve 8, and the outer side of the locking block 9 limits the upward movement of the return sleeve 14. Specifically, as shown... Figure 1 As shown, the locking block 9 has a protrusion that extends beyond the outer side of the drive mechanism body, locking the return tube 14 below the protrusion, limiting the upward movement of the return tube 14, and making the return tube 14 located at the outermost side of the tailpipe hanger.

[0039] The return sleeve 14 of the seat-hanging system is located outside the drive mechanism body 3. Before the drive mechanism is started, the movable sleeve 8 is locked and the locking block 9 is at the upper end of the guide groove 301. The upper end face of the return sleeve 14 abuts against the boss of the locking block 9. After the drive mechanism is started, the movable sleeve 8 slides downward along the axial direction, pushing the locking block 9 to move downward along the guide groove 301, thereby driving the return sleeve 14, connecting sleeve 22, lower connecting sleeve 25, and cone sleeve 27 to move downward as a whole. The cone sleeve 27 causes the slip 28 to open, thereby allowing the tailpipe hanger to sit on the inner wall of the sleeve.

[0040] Specifically, in this embodiment, the driving mechanism is a hydraulic drive mechanism, including a retractable split ball seat 4 and a movable sleeve 8. One end (i.e., the lower end) of the movable sleeve 8 is fixedly connected to the inner side of the locking block 9, and the other end (i.e., the upper end) is fixedly connected to the inner wall of the driving mechanism body 3 in the initial state through a third shear pin 5, thereby keeping the movable sleeve 8 in a locked state in the initial state. Below the third shear pin 5, a first seal 6 and a second seal 7 are installed between the movable sleeve 8 and the inner wall of the driving mechanism body 3. Before the ball is seated, due to the presence of the third shear pin 5, the first seal 6, and the second seal 7, there is no pressure difference surface between the upper and lower parts of the movable sleeve 8. Under the action of the pressure inside the tubing, it cannot move up and down, thus preventing premature action. The lower end of the retractable split ball seat 4 is threadedly connected to the movable sleeve 8. The retractable split ball seat 4 employs a split structure design. In its initial state, it contracts under the pressure of the inner wall of the drive mechanism body 3 to form a ball seat, achieving a sealing effect. After being seated, its inner diameter is the same as that of other components, not affecting the subsequent passage of the drill pipe plug. Specifically, in this embodiment, the movable sleeve 8 and the locking block 9 are connected by a limiting block 10 and a fixing screw 11. The limiting block 10 is embedded in the outer wall of the movable sleeve 8, and the fixing screw 11 securely connects the limiting block 10 and the locking block 9. In another embodiment, the locking block 9 can be an integral structure with the movable sleeve 8.

[0041] The seat suspension system also includes a retaining ring 23. The inner wall of the retaining ring 23 is provided with a first reverse tooth. The retaining ring 23 is sleeved on the outer wall of the seat suspension system body 24 and partially engaged with the inner wall of the lower connecting sleeve 25. The outer wall of the seat suspension system body 24 is provided with a second reverse tooth that cooperates with the first reverse tooth, so that after the tailpipe hanger is seated on the inner wall of the sleeve, the retaining ring 23 cooperates with the seat suspension system body 24 to restrict the retraction of the lower connecting sleeve 25.

[0042] The connection module includes a connection joint 12, a connection sleeve 13, and a torque shaft 18. The end of the hydraulic drive mechanism body 3 is fixedly connected to one end of the connection sleeve 13 through the connection joint. The other end of the connection sleeve 13 is fixedly connected to one end of the torque shaft 18 through a coupling 15. The other end of the torque shaft 18 is fixedly connected to the center tube 21.

[0043] From bottom to top, a reverse threaded sleeve 19, a spring 17, and a thrust bearing 16 are sequentially mounted on the torque shaft 18. Before mounting, the reverse threaded sleeve 19 is fixedly connected to the reverse threaded connector 20 to lock the feed tool into the mounting system. When it is necessary to remove the feed tool, the connection between the reverse threaded sleeve 19 and the reverse threaded connector 20 is released to release the feed tool. It should be noted that the reverse threaded connector 20 is designed with reverse threads that mate with the threads of the reverse threaded sleeve 19. The reverse threaded connector 20, the reverse threaded sleeve 19, the spring 17, and the thrust bearing 16 can all be existing products, and their mutual connection structure is well known to those skilled in the art, and will not be described in detail here.

[0044] Several push rods 30 can be provided and evenly distributed on the outer wall of the seat hanging system body 24. In this embodiment, three sets of push rod slots and screw holes are designed on the push rod fixing sleeve 31. After the push rod 30 is inserted into the push rod slot, it is fixed by screws. The upper end of the push rod 30 is also fixedly connected to the latch 28 by screws.

[0045] The upper end of the drive mechanism body 3 is sequentially fixedly connected to the lifting sub 2 and the conversion joint 1. The upper end of the conversion joint 1 can be connected to the feed drill pipe; therefore, the upper end of the conversion joint 1 is provided with a drill pipe thread that mates with the thread of the feed drill pipe. The lower inner wall of the conversion joint 1 is connected to the outer wall of the lifting sub 2; therefore, the lower inner wall of the conversion joint 1 is provided with a sleeve thread that mates with the thread of the outer wall of the lifting sub 2. The end of the mounting system body 24 is fixedly connected to the tailpipe; therefore, the outer wall of the end of the mounting system body 24 is designed with a sleeve thread that mates with the thread of the inner wall of the tailpipe. In addition, the end of the center tube 21 is fixedly connected to a tailpipe rubber plug connecting clamp 34; and the lower end of the mounting system body 24 is fitted with a centering sleeve 33.

[0046] The working principle and operation process of the integral high-temperature and high-pressure tailpipe hanger provided in this embodiment of the invention are as follows:

[0047] First, assemble the tailpipe hanger. Specifically, sequentially mount the push rod fixing sleeve 31, push rod 30, slip 28, cone sleeve 27, lower connecting sleeve 25, connecting sleeve 22, and return sleeve 14 onto the outer wall of the mounting system body to assemble the mounting system; sequentially connect the rotary joint 1, lifting sub 2, drive mechanism body 3, connecting joint 12, connecting sleeve 13, coupling 15, torque shaft 18, and center tube 21 to assemble the feed tool; place the feed tool into the mounting system, so that the boss of the slip block 9 abuts against the upper end face of the return sleeve, and rotate the feed tool by the feed drill pipe to lock the feed tool into the mounting system.

[0048] Next, the tailpipe hanger is fed in. Specifically, the tailpipe plug is connected to the tailpipe plug connecting coupling 34, the tailpipe is connected to the end of the mounting system body 24, and the feed drill pipe is connected to the adapter 1 to feed in the tailpipe.

[0049] Next, the tailpipe suspension is mounted. Specifically, after the tailpipe reaches the designed position, a top-through circulation is performed; then, a setting ball is inserted into the pipe column. When the setting ball falls into the upper end of the retractable split ball seat 4, a seal is formed, and the pressure inside the pipe column increases. When the pressure inside the pipe column reaches the pressure value of the third shear pin 5, the third shear pin 5 is sheared. At this time, the pressure inside the pipe column will suddenly drop and then continue to rise. This indicates that the hydraulic drive mounting mechanism is operating normally. The shearing of the third shear pin 5 will cause the movable sleeve 8 to separate from the drive mechanism body 3. The retractable split ball seat 4 and the movable sleeve 8 descend together, driving the locking block 9 to descend along the guide groove 301. The locking block 9 pushes the return sleeve 14, the connecting sleeve 22, and the lower connecting sleeve 25 down as a whole. Okay, the first shear pin 26 is cut off, and the cone sleeve 27 continues to descend under the thrust of the return sleeve 14, entering the slip 28, causing the slip 28 to open and sit on the inner wall of the casing; then, by sending in the drill pipe and pressing down the tubing string, the second shear pin 32 is cut off, the push rod fixing sleeve 31 separates from the sitting system body 24, and continues to sit, so that the weight of the tailpipe is fully applied to the slip 28, and the tailpipe hanger is firmly seated, preventing the entire tubing string from sliding down due to improper sitting and loss of control; after sitting, due to the contraction of the retractable split ball seat 4, the sealing ball falls through the ball seat onto the bottom casing accessory, and opens under its own elasticity, with the inner diameter being the same as the inner diameter of other components (e.g., the lifting sub 2).

[0050] Subsequently, the tailpipe hanger can be reversed and cementing can be carried out as usual.

[0051] After the operation is completed, the connection between the delivery tool and the mounting system (i.e., the connection between the reverse threaded sleeve 19 and the reverse threaded connector 20) is released by rotating the delivery drill pipe. After the delivery tool is released, what remains in the well is a complete integral structure without any pressure leakage risk, thus ensuring the integrity of the wellbore.

[0052] The above are exemplary embodiments disclosed in this invention. The order of the disclosed embodiments is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. However, it should be noted that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the disclosed embodiments of this invention (including the claims) is limited to these examples. Various changes and modifications can be made without departing from the scope defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular.

[0053] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of the different aspects of the invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. An integral high-temperature and high-pressure resistant tailpipe hanger, characterized in that, include: Seat-hanging system, the seat-hanging system comprising: The main body of the seat-mounted system; A return sleeve, a conical sleeve, and a slip are fitted onto the body of the seat hanging system along the first direction, wherein the outer conical surface of the conical sleeve mates with the inner conical surface of the slip; The feeding tool includes: A drive mechanism, comprising a drive mechanism body and a movable member located within the drive mechanism body and slidable relative to the drive mechanism body in an axial direction, wherein a guide groove is provided on the side wall of the drive mechanism body extending in an axial direction and penetrating the side wall, and the movable member is connected to a locking block, the locking block being slidably engaged in the guide groove and a portion thereof extending beyond the outer surface of the drive mechanism body. In this configuration, the return sleeve of the mounting system is located outside the drive mechanism body. Before the drive mechanism is activated, the movable component is locked, and the return sleeve abuts against the portion of the locking block extending beyond the outer side of the drive mechanism body. After the drive mechanism is activated, the movable component slides axially, pushing the locking block along the guide groove, which in turn moves the return sleeve and the cone sleeve relative to the mounting system body along the first direction, causing the slips to open and enabling the tailpipe hanger to be mounted. The drive mechanism includes a retractable split ball seat. The movable member is connected to the retractable split ball seat. In the initial state, the retractable split ball seat is retracted to form a ball seat. Before the drive mechanism is started, the movable member is connected to the drive mechanism body through a third shear pin. After the drive mechanism is started, the third shear pin is sheared off.

2. The integral high-temperature and high-pressure tailpipe hanger according to claim 1, characterized in that, Before the seat is hung, the cone sleeve is connected to the seat hanging system body through a first shear pin. During the seat hanging process, the first shear pin is cut off.

3. The integral high-temperature and high-pressure tailpipe hanger according to claim 1, characterized in that, The seat suspension system also includes a push rod and a push rod fixing sleeve. The push rod fixing sleeve is fitted outside the seat suspension system body and is located downstream of the slip in the first direction. One end of the push rod is connected to the slip, and the other end is connected to the push rod fixing sleeve.

4. The integral high-temperature and high-pressure tailpipe hanger according to claim 3, characterized in that, Before the seat is hung, the push rod fixing sleeve is connected to the seat hanging system body through the second shear pin. During the seat hanging process, the second shear pin is cut off.

5. The integral high-temperature and high-pressure tailpipe hanger according to claim 3, characterized in that, The main body of the seat-hanging system includes a main body section and a thickened section, with a stepped surface formed between the main body section and the thickened section. Before being seated, the push rod fixing sleeve abuts against the stepped surface, and after being seated, the push rod fixing sleeve is spaced apart from the stepped surface.

6. The integral high-temperature and high-pressure tailpipe hanger according to claim 3, characterized in that, The system has multiple push rods, which are evenly distributed around the circumference of the seat hanging system body. The push rod fixing sleeve is provided with push rod grooves for accommodating the push rods, and the number of push rod grooves corresponds to the number of push rods.

7. The integral high-temperature and high-pressure tailpipe hanger according to claim 3, characterized in that, The chuck includes a first portion containing the inner conical surface and a second portion connected to the first portion, the outer surface of the second portion tapering inward relative to the outer surface of the first portion, thereby forming a stepped surface between the first portion and the second portion, the push rod abutting against the stepped surface.

8. The integral high-temperature and high-pressure tailpipe hanger according to claim 1, characterized in that, The seat hanging system includes a connecting sleeve and a lower connecting sleeve, which are sequentially sleeved on the body of the seat hanging system along the first direction and located between the return cylinder and the cone sleeve. One end of the connecting sleeve is connected to the return cylinder, and the opposite end of the connecting sleeve is connected to one end of the lower connecting sleeve. The end face of the opposite end of the lower connecting sleeve abuts against the cone sleeve.

9. The integral high-temperature and high-pressure tailpipe hanger according to claim 8, characterized in that, The seat hanging system also includes a retaining spring disposed between the connecting sleeve and the lower connecting sleeve. The retaining spring is sleeved on the outer wall of the seat hanging system body and partially snaps into the inner wall of the lower connecting sleeve.

10. The integral high-temperature and high-pressure tailpipe hanger according to claim 9, characterized in that, The inner wall of the snap ring is provided with a first reverse tooth, and the outer wall of the seat hanging system body is provided with a second reverse tooth that cooperates with the first reverse tooth.

11. The integral high-temperature and high-pressure tailpipe hanger according to claim 1, characterized in that, The seat-hanging system includes a reverse-fastening connector sleeved inside the return cylinder, with one end of the inner wall of the reverse-fastening connector connected to the seat-hanging system body. The feeding tool includes a reverse threaded sleeve that mates with the reverse threaded connector; Before mounting, the reverse threaded sleeve is locked to the reverse threaded connector to lock the feeding tool to the mounting system. When it is necessary to remove the feeding tool, the connection between the reverse threaded sleeve and the reverse threaded connector is released to release the feeding tool.

12. The integral high-temperature and high-pressure tailpipe hanger according to claim 11, characterized in that, The feeding tool includes a central tube, and the inner wall of one end of the drive mechanism body is connected to the central tube through a connecting module; The connection module includes: a connecting joint, a connecting sleeve, and a torque shaft. One end of the drive mechanism body is fixedly connected to one end of the connecting sleeve through the connecting joint. The other end of the connecting sleeve is fixedly connected to one end of the torque shaft through a coupling. The other end of the torque shaft is connected to the central tube.

13. The integral high-temperature and high-pressure tailpipe hanger according to claim 12, characterized in that, The reverse threaded sleeve, spring, and thrust bearing are sequentially mounted on the torque shaft along a second direction, which is opposite to the first direction.

14. The integral high-temperature and high-pressure tailpipe hanger according to claim 1, characterized in that, Below the third shear pin, a sealing element is provided between the movable element and the inner wall of the drive mechanism body.

15. The integral high-temperature and high-pressure tailpipe hanger according to claim 1, characterized in that, The feeding tool includes a lifting section connected to the drive mechanism body and a conversion joint connected to the lifting section, wherein the conversion joint is used to connect to the feeding rod. The seat suspension system includes a support sleeve fitted over the body of the seat suspension system.

16. The integral high-temperature and high-pressure tailpipe hanger according to claim 1, characterized in that, The mounting system remains in the well after the downhole construction operation, and the delivery tool is pulled out of the wellhead after the downhole construction operation.

17. A tubular cementing system, characterized in that, The integral high-temperature and high-pressure tailpipe suspension included in any one of claims 1-16.

Images