Integrated casing hanger and packoff running tool

Abstract

The utility model relates to oil and gas well mouth mounting equipment technical field, concretely relates to integrated casing hanger and PACKOFF's send and take tool, it includes casing hanger, PACKOFF main part, send and take casing, excitation compression ring and locking assembly, casing hanger's upper end inner ring and send and take casing's lower end outer ring screw thread match connection, casing hanger sets up in well hole, and the upper end casing hanger is equipped with PACKOFF main part, is used for sending casing hanger and PACKOFF main part together into well hole, be provided with excitation compression ring on send and take casing, and the upper end PACKOFF main part is provided with locking assembly, locking assembly includes excitation ring and locking snap ring, excitation compression ring is fixed on send and take casing outer ring and is located PACKOFF main part top, excitation ring slidingly sets up on PACKOFF main part outer ring, and is located locking snap ring top, the outer ring of PACKOFF main part still is equipped with locking snap ring, and the bottom end locking snap ring abuts PACKOFF main part's outer ring end face, the utility model discloses realized casing hanger and PACKOFF integrated quick send and take.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas wellhead installation equipment technology, and more specifically, to an integrated casing hanger and a PACKOFF delivery and retrieval tool. Background Technology

[0002] Casing hangers are key pieces of equipment installed inside the casing head during oil and gas drilling and completion. They are primarily used to suspend and support the downhole casing string, ensuring casing stability and providing a sealing function to prevent fluid leakage from the well. Packoffs, on the other hand, are devices used in oil and gas wells to isolate different formations or fluids. They seal the annular space between the casing and tubing, providing an outlet for pressure that may accumulate between the two casing strings. Generally, during oil and gas well construction, packoffs are installed on the casing hangers to ensure interlayer isolation and pressure control.

[0003] Currently, there are still some problems with the installation of casing hangers. The traditional installation method involves first sending the casing hanger into the wellhead separately using the casing hanger delivery tool, and then using the packoff delivery tool to send the packoff above the casing hanger and connect and secure it. However, because the delivery tools for the two methods have different movements, the casing hanger and the packoff cannot be delivered into the wellhead simultaneously and must be delivered separately. This installation method is not only cumbersome and costly in terms of labor and time, but also increases the difficulty of installation.

[0004] To solve the above problems, a delivery and retrieval tool is needed that can quickly install casing hangers and packoffs inside oil and gas wells. Summary of the Invention

[0005] The purpose of this application is to provide an integrated casing hanger and PACKOFF delivery tool, which solves the technical problem of integrated and rapid delivery of the casing hanger and PACKOFF.

[0006] To solve the above-mentioned technical problems, the solution adopted in this application is as follows: The integrated bushing hanger and packoff delivery tool includes the bushing hanger, packoff body, delivery bushing, excitation pressure ring, and locking assembly.

[0007] Preferably, the upper inner ring of the sleeve hanger and the lower outer ring of the delivery sleeve are threadedly matched.

[0008] Preferably, the casing hanger is installed inside the wellbore.

[0009] Preferably, the upper end of the sleeve hanger is fitted with a PACKOFF body.

[0010] Preferably, the delivery sleeve is provided with an excitation pressure ring, and the upper end of the PACKOFF body is provided with a locking component.

[0011] Preferably, the locking assembly includes an excitation ring and a locking retaining ring.

[0012] Preferably, the excitation pressure ring is fixed on the outer ring of the delivery sleeve and located above the PACKOFF body.

[0013] Preferably, the excitation ring is slidably disposed on the outer ring of the PACKOFF body, located above the locking ring.

[0014] Preferably, a locking ring is also fitted on the outer ring of the PACKOFF body, with the bottom end of the locking ring abutting against the end face of the outer ring of the PACKOFF body.

[0015] Preferably, the bottom end of the PACKOFF body is fixedly provided with multiple positioning pins, and the upper end of the sleeve hanger is correspondingly provided with multiple pin holes, with the positioning pins and pin holes vertically corresponding and matching.

[0016] Preferably, a protrusion is fixed on the inner ring surface of the excitation ring, and the protrusion is vertically slidably connected to a vertical groove provided on the outer ring of the PACKOFF body. The excitation ring restricts its circumferential rotation relative to the PACKOFF body through the protrusion.

[0017] Preferably, the top end of the inner ring of the locking ring is an inclined surface, which abuts against the bottom end of the excitation ring, and the inclined bottom end of the inclined surface is close to the outer ring of the PACKOFF body.

[0018] Preferably, the locking ring is configured as a C-shaped open-loop structure.

[0019] Preferably, the outer side of the PACKOFF body is close to the inner wall of the shaft, and the inner wall of the shaft has a ring groove, the position of which matches the position of the locking ring on the PACKOFF body after delivery.

[0020] Preferably, a ring groove is provided on both the inner ring surface of the excitation pressure ring and the outer ring surface of the delivery sleeve, and a number of rolling balls are rolled in the ring groove.

[0021] Preferably, a sealing ring is fixedly fitted on the bottom outer ring of the delivery sleeve, and the sealing ring is located below the thread of the outer ring of the delivery sleeve.

[0022] Preferably, the sealing ring of the outer ring of the casing abuts against the inner ring surface of the casing hanger.

[0023] The technical solution of this application has at least the following advantages and beneficial effects: In this utility model, in order to solve the problem of installing the casing hanger and PACKOFF separately into the oil and gas well, a threadable delivery and retrieval casing is set up as a common delivery and retrieval tool for both the casing hanger and PACKOFF, so that both can be put into the well together without multiple delivery and retrieval, reducing installation time and installation difficulty. In this utility model, in order to install and fix the casing hanger and PACKOFF that are sent into the wellbore together, an excitation pressure ring is provided on the delivery casing, and a locking component is provided on the upper end of the PACKOFF. When the PACKOFF is fixed, the casing hanger below it is suspended and fixed in the wellbore. At this time, the excitation pressure ring can press down the locking component, and the locking component is used to press and fix the upper end of the PACKOFF in the wellbore. After the upper and lower ends of the PACKOFF are restricted, it can be fixed in the wellbore. In this invention, in order to reduce installation time and difficulty, after the casing hanger and PACKOFF are sent into the wellbore and fixedly installed by the delivery and take-off casing, there is no need to remove the delivery and take-off casing. At this time, the delivery and take-off casing, the casing hanger and PACKOFF form an integrated structure, which can maintain normal oil and gas wellbore operation. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the present invention when it is seated or hung.

[0025] Figure 2 This is a cross-sectional view of the excitation pressure ring fixed on the delivery sleeve in this utility model.

[0026] Figure 3 This is a cross-sectional view of the sleeve hanger in this utility model.

[0027] Figure 4 This is a cross-sectional view of the PACKOFF main body in this utility model.

[0028] In the diagram: 1-Feeding and unloading sleeve, 2-Excitation pressure ring, 3-Excitation ring, 4-Locking retaining ring, 5-PACKOFF body, 6-Sleeve hanger, 7-Ball bearing, 8-Positioning pin, 9-Sealing ring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "center," "upper," "lower," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the figures, or the orientation or positional relationships commonly used when the product is in use, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this application. It should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example

[0031] Please refer to Figures 1-4 In order to achieve integrated delivery and fixation of the bushing hanger and the PACKOFF, this utility model provides an integrated bushing hanger and PACKOFF delivery tool in this embodiment, including a bushing hanger 6, a PACKOFF body 5, a delivery bushing 1, an excitation pressure ring 2, and a locking assembly.

[0032] Furthermore, the inner ring at the upper end of the casing of the casing hanger 6 is provided with threads, and the delivery casing 1 is also a hollow cylindrical structure with threads on the outer ring at its lower end, so that the upper end of the casing hanger 6 and the lower end of the delivery casing 1 are threadedly matched and connected.

[0033] When it is necessary to send the casing hanger 6 into the wellhead, the delivery and take-up casing 1 can be threaded to the casing hanger 6, and then the delivery and take-up casing 1 can be extended into the wellhead to send the casing hanger 6 into the wellhead and achieve suspension and fixation.

[0034] Furthermore, the upper end of the casing hanger 6 is fitted with a PACKOFF body 5, and the bottom end of the PACKOFF body 5 is fixedly provided with multiple positioning pins 8. The upper end of the casing hanger 6 is correspondingly provided with multiple pin holes. When the PACKOFF body 5 is fitted onto the upper end of the casing hanger 6, the positioning pins 8 at the bottom of the PACKOFF body 5 will be inserted into the pin holes to position the two together and prevent the PACKOFF body 5 from rotating freely relative to the casing hanger 6, causing installation errors and affecting subsequent wellbore operations.

[0035] When performing delivery and retrieval operations, the operator first matches and connects the casing hanger 6 and the delivery and retrieval casing 1. Then, the PACKOFF body 5 is passed through the delivery and retrieval casing 1, fitted onto the upper end of the casing hanger 6 and positioned to form an integrated structure. At this time, the casing hanger 6 and the PACKOFF body 5 can be simultaneously delivered into the wellbore by extending the delivery and retrieval casing 1 into the wellbore.

[0036] Furthermore, in order to secure the casing hanger 6 and the PACKOFF body 5 together within the wellbore after they are inserted into the wellbore, an excitation pressure ring 2 is provided on the delivery casing 1, and a locking assembly is provided on the upper end of the PACKOFF body 5. During the securing of the PACKOFF body 5, the casing hanger 6 below it is suspended and fixed within the wellbore. At this time, the excitation pressure ring 2 can press down on the locking assembly, using the locking assembly to press and fix the upper end of the PACKOFF body 5 within the wellbore. With both the upper and lower ends of the PACKOFF body 5 restricted, it is thus secured within the wellbore.

[0037] The locking assembly includes an excitation ring 3 and a locking retaining ring 4.

[0038] Specifically, the excitation pressure ring 2 is fixed on the outer ring of the delivery sleeve 1 and is located above the PACKOFF body 5.

[0039] The excitation ring 3 is slidably mounted on the outer ring of the PACKOFF body 5, and a protrusion is fixed on the inner ring surface of the excitation ring 3. The protrusion is slidably connected to the vertical groove on the outer ring of the PACKOFF body 5, so that the excitation ring 3 can slide along the pipe length direction of the PACKOFF body 5, but cannot rotate, thereby reducing the wear caused by rotation to the PACKOFF body 5.

[0040] A locking ring 4 is also fitted on the outer ring of the PACKOFF main body 5. The bottom end of the locking ring 4 abuts against the end face of the outer ring of the PACKOFF main body 5, restricting its vertical displacement. The top end of the inner ring of the locking ring 4 is an inclined surface, which abuts against the bottom end of the excitation ring 3. The inclined bottom end of the inclined surface is close to the outer ring of the PACKOFF main body 5. As a result, when the excitation ring 3 slides downward, the excitation ring 3 will apply a force to the inclined surface of the locking ring 4, so that the inner side of the locking ring 4 is subjected to a radial force, causing the locking ring 4 to open radially.

[0041] To ensure the locking ring 4 can open under radial force, it is designed with a C-shaped open-loop structure. Because the outside of the PACKOFF body 5 is close to the inner wall of the shaft, a ring-shaped groove is also formed on the inner wall of the shaft. The position of the groove matches the position of the locking ring 4 on the PACKOFF body 5 after delivery. When the locking ring 4 is subjected to an inward radial force, it gradually opens outward until the outer ring of the locking ring opens into the groove on the inner wall of the shaft, restricting the vertical position of the locking ring 4 and thus limiting the upward displacement of the PACKOFF body 5.

[0042] The excitation ring 3 is subjected to the excitation pressure ring 2. Since the delivery and take-up casing 1 is threadedly connected to the casing hanger 6, after the casing hanger 6 is installed and fixed in the wellbore through the delivery and take-up casing 1, the operator can rotate the delivery and take-up casing 1 so that the delivery and take-up casing 1 can be vertically displaced relative to the casing hanger 6.

[0043] When the tubing hanger is in place and the PACKOFF body 5 needs to be secured, the operator twists the delivery casing 1, causing the excitation pressure ring 2 fixed on the delivery casing 1 to move downward, thereby pressing down the excitation ring 3 on the outer ring of the lower PACKOFF body 5. This causes the locking ring 4 to open and engage with the inner wall of the wellbore, restricting the upper end of the PACKOFF body 5 through the locking ring 4, thus securing the PACKOFF body 5 inside the wellbore.

[0044] However, since the feed sleeve 1 needs to rotate (thread matching) when it makes vertical displacement, it will also drive the excitation pressure ring 2 on it to rotate. When the excitation pressure ring 2 moves down with the feed sleeve 1 and presses down on the excitation ring 3, it is always in a rotating state. This can easily cause the excitation pressure ring 2 to rotate and wear the excitation ring 3 and the PACKOFF body 5 on the inner side of the excitation ring 3, affecting its integrity and safety.

[0045] Therefore, a ring groove is provided on the inner ring surface of the excitation pressure ring 2 and the outer ring surface of the delivery sleeve 1. Several balls 7 are rolled in the ring groove, so that the excitation pressure ring 2 can rotate freely relative to the delivery sleeve 1. When the delivery sleeve 1 is vertically displaced, the excitation pressure ring 2 directly presses down on the excitation ring 3 and no longer rotates.

[0046] It is worth noting that the inner ring surface at the bottom of the excitation pressure ring 2 slides against the outer ring surface of the PACKOFF body 5, so that the excitation pressure ring 2 will not interfere with the PACKOFF body 5 when it moves downward relative to it.

[0047] Furthermore, in this embodiment, after the specific delivery and fixing process is completed, it is not necessary to disassemble the delivery sleeve 1. At this time, the inner diameter channel of the delivery sleeve 1 is connected to the inner diameter channel of the sleeve hanger 6, so that the delivery sleeve 1 also becomes part of the pipe structure of the sleeve hanger 6, forming an integrated structure.

[0048] As the pipeline structure connecting the sleeve hanger 6 and the PACKOFF body 5, it is also necessary to seal the connection between the delivery sleeve 1 and the sleeve hanger 6 to reduce the leakage of oil, gas and other media inside the pipeline structure when the sleeve hanger 6 is working.

[0049] Specifically, a sealing ring 9 is fixedly fitted on the outer ring at the bottom end of the delivery sleeve 1. The sealing ring 9 is located below the thread. When the delivery sleeve 1 is threadedly connected to the sleeve hanger 6, the sealing ring 9 on the outer ring of the delivery sleeve 1 will abut against the inner ring surface of the sleeve hanger 6, sealing the connection gap between the two, thereby reducing the leakage of oil and gas media in the pipe.

[0050] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solution of this utility model based on the above description. The scope of this utility model is defined by the appended claims.

Claims

1. An integrated sleeve hanger and a PACKOFF delivery tool, characterized in that, It includes a bushing hanger (6), a PACKOFF body, a delivery and take-up bushing (1), an excitation pressure ring (2), and a locking assembly; The upper inner ring of the sleeve hanger (6) and the lower outer ring of the delivery sleeve (1) are threadedly matched. The casing hanger (6) is installed inside the shaft; The upper end of the sleeve hanger (6) is fitted with a PACKOFF body; An excitation pressure ring (2) is provided on the delivery sleeve (1), and a locking component is provided on the upper end of the PACKOFF main body; The locking assembly includes an excitation ring (3) and a locking retaining ring (4); The excitation pressure ring (2) is fixed on the outer ring of the delivery sleeve (1) and located above the PACKOFF body; The excitation ring (3) is slidably disposed on the outer ring of the PACKOFF main body, above the locking ring (4); A locking ring (4) is also fitted on the outer ring of the PACKOFF body, and the bottom end of the locking ring (4) abuts against the outer ring end face of the PACKOFF body.

2. The integrated sleeve hanger and PACKOFF delivery tool according to claim 1, characterized in that, The bottom of the PACKOFF body is fixedly provided with multiple positioning pins (8), and the upper end of the sleeve hanger (6) is provided with multiple pin holes. The positioning pins (8) and the pin holes are vertically matched.

3. The integrated sleeve hanger and PACKOFF delivery tool according to claim 1, characterized in that, The inner ring surface of the excitation ring (3) is fixed with a protrusion, which is vertically slidably connected to the vertical groove provided on the outer ring of the PACKOFF body. The excitation ring (3) restricts its circumferential rotation relative to the PACKOFF body through the protrusion.

4. The integrated sleeve hanger and PACKOFF delivery tool according to claim 1, characterized in that, The top of the inner ring of the locking ring (4) is an inclined surface, which abuts against the bottom of the excitation ring (3), and the inclined bottom of the inclined surface is close to the outer ring of the PACKOFF body.

5. The integrated sleeve hanger and PACKOFF delivery tool according to claim 1, characterized in that, The locking ring (4) is configured as a C-shaped open ring structure; The outer side of the PACKOFF body is close to the inner wall of the shaft. The inner wall of the shaft has a ring groove. The position of the ring groove matches the position of the locking ring (4) on the PACKOFF body after delivery.

6. The integrated sleeve hanger and PACKOFF delivery tool according to claim 1, characterized in that, A ring groove is provided on the inner ring surface of the excitation pressure ring (2) and the outer ring surface of the delivery sleeve (1), and a number of rolling balls (7) are rolled in the ring groove.

7. The integrated sleeve hanger and PACKOFF delivery tool according to claim 1, characterized in that, A sealing ring (9) is fixedly sleeved on the outer ring of the bottom end of the delivery sleeve (1), and the sealing ring (9) is located below the thread of the outer ring of the delivery sleeve (1). The sealing ring (9) of the outer ring of the delivery sleeve (1) abuts against the inner ring surface of the sleeve hanger (6).

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