Wellhead eccentric tubing hanger device

Abstract

The utility model discloses a kind of wellhead eccentric oil pipe hanger devices, it is related to wellhead oil pipe field, including connecting ring body and the multiple rubber ring grooves of being opened in the outer wall of connecting ring body, the upper end of connecting ring body is equipped with upper interface end, and the bottom end of connecting ring body is integrally connected with lower interface, and the center of upper interface end and lower interface is coincident, the inner wall of upper interface end is threadedly connected with inner adapter sleeve.In the utility model, through the connection of inner adapter sleeve and upper interface end, the inner adapter sleeve and connecting ring body can be flexibly disassembled, which makes it easy for users to adjust the position of the rotating plate through the inner adapter sleeve. Moreover, under the rotating action of the rotating plate below the inner adapter sleeve, users can flexibly rotate the eccentric port position through the rotating plate, which facilitates the connection and sealing of the eccentric oil pipe at the synchronous position. The utility model has wide applicability and ensures the positional accuracy of the eccentric port below the upper interface end, facilitating the accurate connection and sealing of the eccentric oil pipe and ensuring the sealing effect of the formation pressure and the eccentric wellhead.

Description

Technical Field

[0001] This utility model relates to the field of wellhead tubing technology, and in particular to a wellhead eccentric tubing hanger device. Background Technology

[0002] A tubing hanger is a device that supports tubing and seals the annular space between the tubing and casing. The sealing method utilizes the weight of the tubing to seal the connection between the hanger and the tubing onto the large four-way cone of the hanger. It is easy to operate, allows for rapid wellhead changes, and is safe. It is a crucial device in oil and gas well production for suspending the weight of the tubing string and preventing it from falling. Its core function is to seal the annular space between the tubing and casing to isolate it from formation pressure and wellhead equipment. Current wellhead tubing hangers have certain limitations in structure and function. When connecting tubing and casing, they can usually only connect concentric tubing and casing of the same diameter. When using eccentric tubing, the different positions of the annular space between the two tubing sections make it difficult to guarantee an effective seal. This necessitates modifications to the tubing during use, resulting in a large workload and potentially poor sealing. Utility Model Content

[0003] This invention provides a wellhead eccentric tubing hanger, which solves the problems in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An eccentric tubing hanger at the wellhead includes a connecting ring body and multiple rubber ring grooves formed on the outer wall of the connecting ring body. The upper end of the connecting ring body is provided with an upper end, and the bottom end of the connecting ring body is integrally connected with a lower interface. The center of the upper end and the center of the lower interface coincide. The inner wall of the upper end is threadedly connected with an inner cylinder, and a rotating plate is rotatably connected to the lower part of the inner cylinder.

[0006] The bottom end of the rotating plate is fixedly connected with multiple fixing bolts, and the fixing bolts are threadedly connected to the bottom end of the inner cylinder. The interior of the rotating plate is fixedly connected with an eccentric opening, which is eccentrically set on one side of the rotating plate.

[0007] As a further description of the above technical solution:

[0008] The outer wall of the inner tube is fixedly connected with an external threaded groove, and the external threaded groove is threaded to the inner wall of the upper end, and the inner wall of the upper end is provided with a threaded line corresponding to the external threaded groove.

[0009] As a further description of the above technical solution:

[0010] The inner cylinder has an annular groove at its lower interior that can accommodate the rotation of the rotating plate, and multiple threaded holes are equally spaced inside the annular groove, with the multiple threaded holes corresponding to multiple fixing bolts.

[0011] As a further description of the above technical solution:

[0012] The rotating plate is arranged parallel to the bottom of the inner cylinder, and the center of the rotating plate coincides with the center of the inner cylinder.

[0013] As a further description of the above technical solution:

[0014] The inner wall of the lower interface is provided with an internal thread groove, which is arranged parallel to the thread line below, and the center of the lower interface coincides with the center of the inner cylinder.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] In this invention, the connection between the inner tube and the upper end allows for flexible disassembly of the inner tube and the connecting ring, facilitating user adjustment of the rotating plate position via the inner tube. Furthermore, the rotation of the rotating plate below the inner tube allows for flexible rotation of the eccentric port position, facilitating the connection and sealing of the eccentric tubing at the synchronous position. This design offers wide applicability, ensures the accuracy of the eccentric port position below the upper end, facilitates precise connection and sealing of the eccentric tubing, and guarantees the sealing effect of the formation pressure and the eccentric wellhead. Attached Figure Description

[0017] Figure 1 A schematic diagram of a wellhead eccentric tubing hanger;

[0018] Figure 2 This is a cross-sectional structural diagram of the wellhead eccentric tubing hanger of this utility model;

[0019] Figure 3 This is an exploded structural diagram of the wellhead eccentric tubing hanger of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the inner tube and the rotating plate in this utility model;

[0021] Figure 5 This is a bottom view of the inner tube and rotating plate in this utility model.

[0022] Legend:

[0023] 1. Connecting ring body; 2. Rubber ring groove; 3. Upper end; 4. Lower interface; 5. Internal thread groove; 6. Inner sleeve; 7. External thread groove; 8. Rotating plate; 9. Eccentric opening; 10. Threaded hole; 11. Fixing bolt. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-5 An eccentric tubing hanger for wellheads includes a connecting ring 1, multiple rubber ring grooves 2 formed on the outer wall of the connecting ring 1, an upper end 3, a lower interface 4, an internal thread groove 5, an inner sleeve 6, an external thread groove 7, a rotating plate 8, an eccentric opening 9, threaded holes 10, and fixing bolts 11. The upper end 3 is provided at the upper end of the connecting ring 1, and the lower interface 4 is integrally connected to the bottom end of the connecting ring 1. The centers of the upper end 3 and the lower interface 4 coincide. This arrangement facilitates a stable connection between the connecting ring 1 and the tubing head four-way connector. An inner sleeve 6 is threadedly connected to the inner wall of the upper end 3. Specifically, an external thread groove 7 is fixedly connected to the outer wall of the inner sleeve 6, and the external thread groove 7 is threaded to the inner wall of the upper end 3. The inner wall of the upper end 3 is provided with a threaded line corresponding to the external thread groove 7. With this setting, the inner sleeve 6 can be flexibly disassembled inside the upper end 3 through the external thread groove 7 and the threaded line, which improves the connection stability and flexibility above the connecting ring body 1 and facilitates the rotation plate 8 below to connect eccentric oil pipes at different positions.

[0026] In addition, in order to achieve the overall pipe connection effect of the connecting ring 1, an internal thread groove 5 is provided on the inner wall of the lower interface 4. The internal thread groove 5 is set parallel to the lower thread line, and the center of the lower interface 4 coincides with the center of the inner sleeve 6. With this setting, the lower sleeve can be stably connected to the connecting ring 1 through the internal thread groove 5, ensuring the working effect of the oil pipe hanging device.

[0027] Furthermore, to achieve the connection effect of eccentric oil pipes at different positions, a rotating plate 8 is rotatably connected below the inner connecting cylinder 6. The rotating plate 8 is arranged parallel to the lower part of the inner connecting cylinder 6, and the center of the rotating plate 8 coincides with the center of the inner connecting cylinder 6. An eccentric port 9 is fixedly connected inside the rotating plate 8, and the eccentric port 9 is eccentrically set on one side of the rotating plate 8. In order to fix the rotating plate 8, multiple fixing bolts 11 are fixedly connected to the bottom end of the rotating plate 8, and the fixing bolts 11 are threaded to the bottom end of the inner connecting cylinder 6. Specifically, an annular groove is opened inside the lower part of the inner connecting cylinder 6 to accommodate the rotation of the rotating plate 8. Through the setting of the annular groove, the user can place the rotating plate 8 in the inner connecting cylinder 6. The lower part of the cylinder 6 rotates, allowing the user to adjust the position of the eccentric port 9 by rotating the plate 8. This enables the connection of tubing at different eccentric positions. Furthermore, multiple threaded holes 10 are equidistantly opened inside the annular groove, and these threaded holes 10 are correspondingly set with multiple fixing bolts 11. The setting of the threaded holes 10 and fixing bolts 11 ensures that the rotating plate 8 is stably fixed after the angle is adjusted below the inner cylinder 6, ensuring the positional stability of the eccentric port 9 driven by the rotating plate 8. This setting ensures the accuracy of the position of the eccentric port 9 below the upper end 3, facilitating precise connection and sealing of the eccentric tubing, and ensuring the sealing effect of the formation pressure and the wellhead.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wellhead eccentric tubing hanger, comprising a connecting ring body (1) and a plurality of rubber ring grooves (2) formed on the outer wall of the connecting ring body (1), characterized in that: The upper end of the connecting ring (1) is provided with an upper end (3), and the bottom end of the connecting ring (1) is integrally connected with a lower interface (4). The center of the upper end (3) and the center of the lower interface (4) coincide. The inner wall of the upper end (3) is threaded with an inner cylinder (6), and a rotating plate (8) is rotatably connected below the inner cylinder (6). The bottom end of the rotating plate (8) is fixedly connected with a plurality of fixing bolts (11), and the fixing bolts (11) are threadedly connected to the bottom end of the inner tube (6). The interior of the rotating plate (8) is fixedly connected with an eccentric opening (9), and the eccentric opening (9) is eccentrically set on one side of the rotating plate (8).

2. The wellhead eccentric tubing hanger according to claim 1, characterized in that: The outer wall of the inner tube (6) is fixedly connected with an external threaded groove (7), and the external threaded groove (7) is threadedly connected to the inner wall of the upper end (3), and the inner wall of the upper end (3) is provided with a threaded line corresponding to the external threaded groove (7).

3. The wellhead eccentric tubing hanger according to claim 2, characterized in that: The inner tube (6) has an annular groove at the bottom that can accommodate the rotation of the rotating plate (8), and multiple threaded holes (10) are equally spaced inside the annular groove. The multiple threaded holes (10) are correspondingly arranged with respect to multiple fixing bolts (11).

4. The wellhead eccentric tubing hanger according to claim 3, characterized in that: The rotating plate (8) is arranged parallel to the bottom of the inner tube (6), and the center of the rotating plate (8) coincides with the center of the inner tube (6).

5. The wellhead eccentric tubing hanger according to claim 1, characterized in that: The inner wall of the lower interface (4) is provided with an internal thread groove (5), which is arranged parallel to the thread line below, and the center of the lower interface (4) coincides with the center of the inner cylinder (6).

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