Self-sealing well plugging device for well repair in oil field

Abstract

The utility model relates to the technical field of oil field well repair, and discloses a self-sealing well plugging device for oil field well repair, which comprises a flange connecting assembly, a mounting shell is fixedly mounted at the upper end of the outer wall of the flange connecting assembly, an automatic plugging mechanism is arranged on the inner wall of the mounting shell, and the flange connecting assembly comprises a flange plate. A movable groove is formed in the left side wall face of the flange plate, the automatic plugging mechanism comprises a servo motor, and the right side wall face of the servo motor is fixedly connected with the left side wall face of the mounting shell. The automatic plugging mechanism can drive the first plugging plate and the first rubber sealing gasket to be close to the second plugging plate and the second rubber sealing gasket to seal the inner wall of the flange plate, so that the purpose of automatic well plugging is achieved, and the well repairing and plugging efficiency of an oil field is improved; and the wellhead can be sealed through the first rubber sealing gasket and the second rubber sealing gasket, and the requirement for well repair of an oil field is met.

Description

Technical Field

[0001] This utility model relates to the field of oilfield well workover technology, and in particular to a self-sealing well sealing device for oilfield well workover. Background Technology

[0002] With the rapid development of my country's national economy, the demand for crude oil has increased exponentially, and more and more devices are being used at wellheads. At the same time, more and more oil fields are being developed and constructed, and the running and retrieval of tubing and downhole tools are becoming more and more frequent. Well sealing devices have been specially designed and manufactured for this working condition.

[0003] Existing well sealing devices require manual disassembly and assembly of multiple bolts during well sealing, which is not only time-consuming and labor-intensive, reducing the efficiency of well workover and sealing in oilfields, but also prone to incomplete sealing, posing certain safety hazards and failing to meet the needs of well workover in oilfields.

[0004] Therefore, we propose a self-sealing well sealing device for oilfield well workover. Utility Model Content

[0005] The present invention aims to solve the technical problems existing in the prior art and provide a self-sealing well sealing device for oilfield well workover.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a self-sealing well sealing device for oilfield well workover, comprising a flange connection assembly, an installation shell fixedly installed on the upper end of the outer wall of the flange connection assembly, an automatic sealing mechanism provided on the inner wall of the installation shell, the flange connection assembly including a flange, a movable groove opened on the left side wall of the flange, the automatic sealing mechanism including a servo motor, and the right side wall of the servo motor being fixedly connected to the left side wall of the installation shell, the output end of the servo motor movably penetrating through the left side of the inner wall of the installation shell, a first gear being fixedly installed on the output end of the servo motor through a connecting shaft, a second gear being movably meshed at the front end of the outer wall of the first gear, and the left side wall of the second gear being movably connected to the left side of the inner wall of the installation shell through a connecting shaft.

[0007] Preferably, a first positive and negative lead screw is fixedly installed on the right side wall of the second gear, and a first sealing plate is threadedly connected to the left side of the outer wall of the first positive and negative lead screw, and the outer wall of the first sealing plate is movably connected to the inner wall of the flange at the movable groove.

[0008] Preferably, a first rubber sealing gasket is fixedly installed on the right side wall of the first sealing plate, and a second sealing plate is threadedly connected to the right side of the outer wall of the first positive and negative screw rod, and the outer wall of the second sealing plate is movably connected to the inner wall of the flange at the movable groove.

[0009] Preferably, a second rubber sealing gasket is fixedly installed on the left side wall of the second sealing plate.

[0010] Preferably, a third gear is fixedly installed on the right side wall of the first positive and negative lead screw, and the right side wall of the third gear is movably connected to the right side of the inner wall of the mounting housing via a connecting shaft.

[0011] Preferably, the rear end of the outer wall of the third gear is movably engaged with the fourth gear, and the right side wall of the fourth gear is movably connected to the right side of the inner wall of the mounting housing via a connecting shaft.

[0012] Preferably, the rear end of the outer wall of the fourth gear is movably engaged with the fifth gear, and the right side wall of the fifth gear is movably connected to the right side of the inner wall of the mounting housing via a connecting shaft.

[0013] Preferably, a second positive and negative lead screw is fixedly installed on the left side wall of the fifth gear, and the right side of the outer wall of the second positive and negative lead screw is threadedly connected to the rear end of the inner wall of the second sealing plate, and the left side of the outer wall of the second positive and negative lead screw is threadedly connected to the rear end of the inner wall of the first sealing plate.

[0014] Preferably, a sixth gear is fixedly installed on the left side wall of the second positive and negative lead screw, and the front end of the outer wall of the sixth gear is movably meshed with the rear end of the outer wall of the first gear. The left side wall of the sixth gear is movably connected to the left side of the inner wall of the mounting housing through a connecting shaft.

[0015] This utility model provides a self-sealing well sealing device for oilfield well workover. It has the following beneficial effects:

[0016] 1. This self-sealing well sealing device for oilfield well workover includes a flange connection assembly and an automatic sealing mechanism. The automatic sealing mechanism drives the first sealing plate, the first rubber sealing gasket, the second sealing plate, and the second rubber sealing gasket to move closer together to seal the inner wall of the flange, thereby achieving automatic well sealing and improving the efficiency of well workover in oilfields. The first and second rubber sealing gaskets also achieve a sealing effect on the wellhead, meeting the needs of oilfield well workover.

[0017] 2. This self-sealing well-sealing device for oilfield well workover has a first positive and negative screw and a second positive and negative screw. The first positive and negative screw and the second positive and negative screw have a self-locking function and can drive the first sealing plate and the second sealing plate to move closer or further apart. This not only improves the stability of the entire device operation, but also saves a lot of installation space.

[0018] 3. This self-sealing well-sealing device for oilfield well workover has a first gear, a second gear, a sixth gear, a third gear, a fourth gear, and a fifth gear. The combination of the first gear, the second gear, the sixth gear, the third gear, the fourth gear, and the fifth gear can drive the first and second forward and reverse screws to rotate in the same direction simultaneously through a single servo motor, thereby making the entire automatic sealing mechanism operate more stably. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the left wall structure of the flange connection assembly of this utility model;

[0021] Figure 3 This is a front view of the automatic sealing mechanism of this utility model.

[0022] Legend: 10. Flange connection assembly; 11. Mounting housing; 12. Automatic sealing mechanism; 13. Flange; 14. Movable groove; 15. Servo motor; 16. First gear; 17. Second gear; 18. First forward and reverse screw; 19. First sealing plate; 20. First rubber sealing gasket; 21. Second sealing plate; 22. Second rubber sealing gasket; 23. Third gear; 24. Fourth gear; 25. Fifth gear; 26. Second forward and reverse screw; 27. Sixth gear. Detailed Implementation

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] It should be noted that similar labels 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.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "inner," "outer," and "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0028] 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.

[0029] Example 1: A self-sealing well sealing device for oilfield well workover, such as... Figures 1-2 As shown, the assembly includes a flange connection assembly 10. An installation shell 11 is fixedly installed on the upper end of the outer wall of the flange connection assembly 10. An automatic sealing mechanism 12 is provided on the inner wall of the installation shell 11. The flange connection assembly 10 includes a flange 13. A movable groove 14 is opened on the left side wall of the flange 13. By setting the flange connection assembly 10 and the automatic sealing mechanism 12, the automatic sealing mechanism 12 can drive the first sealing plate 19, the first rubber sealing gasket 20, the second sealing plate 21, and the second rubber sealing gasket 22 to move closer to each other, so as to seal the inner wall of the flange 13, thereby achieving the purpose of automatic well sealing, improving the efficiency of well repair and sealing in oilfields, and the first rubber sealing gasket 20 and the second rubber sealing gasket 22 can achieve the sealing effect on the wellhead, meeting the needs of well repair in oilfields.

[0030] Example 2: Based on Example 1, as follows Figure 3As shown, the automatic sealing mechanism 12 includes a servo motor 15, and the right side wall of the servo motor 15 is fixedly connected to the left side wall of the mounting housing 11. The output end of the servo motor 15 movably passes through the left side of the inner wall of the mounting housing 11. A first gear 16 is fixedly mounted on the output end of the servo motor 15 via a connecting shaft. A second gear 17 is movably meshed with the front end of the outer wall of the first gear 16, and the left side wall of the second gear 17 is movably connected to the left side of the inner wall of the mounting housing 11 via a connecting shaft. A first positive and negative lead screw 18 is fixedly mounted on the right side wall of the second gear 17. A first sealing plate 19 is threadedly connected to the left side of the outer wall of the first positive and negative lead screw 18, and the outer wall of the first sealing plate 19 is movably connected to the inner wall of the flange 13 at the movable groove 14. A first sealing plate 19 is fixedly mounted on the right side wall of the first sealing plate 19. The first rubber sealing gasket 20 and the second sealing plate 21 are threadedly connected to the right side of the outer wall of the first positive and negative screw 18. The outer wall of the second sealing plate 21 is movably connected to the inner wall of the flange 13 at the movable groove 14. The second rubber sealing gasket 22 is fixedly installed on the left side of the second sealing plate 21. The third gear 23 is fixedly installed on the right side of the first positive and negative screw 18. The right side of the third gear 23 is movably connected to the right side of the inner wall of the mounting shell 11 through a connecting shaft. By setting the first positive and negative screw 18 and the second positive and negative screw 26, the first positive and negative screw 18 and the second positive and negative screw 26 have a self-locking function and can drive the first sealing plate 19 and the second sealing plate 21 to move closer or further apart. This not only improves the stability of the entire device operation, but also saves a lot of installation space.

[0031] Example 3: Based on Examples 1 and 2, as follows... Figure 3As shown, the rear end of the outer wall of the third gear 23 is movably engaged with the fourth gear 24, and the right side wall of the fourth gear 24 is movably connected to the right side of the inner wall of the mounting housing 11 via a connecting shaft. The rear end of the outer wall of the fourth gear 24 is movably engaged with the fifth gear 25, and the right side wall of the fifth gear 25 is movably connected to the right side of the inner wall of the mounting housing 11 via a connecting shaft. The left side wall of the fifth gear 25 is fixedly installed with the second positive and negative screw 26, and the right side of the outer wall of the second positive and negative screw 26 is threadedly connected to the rear end of the inner wall of the second sealing plate 21. The left side of the outer wall of the second positive and negative screw 26 is threadedly connected to the rear end of the inner wall of the first sealing plate 19. The left side wall of the second positive and negative screw 26 is fixedly installed with... The sixth gear 27 has its outer front end engaging with the outer rear end of the first gear 16. The left side of the sixth gear 27 is movably connected to the left side of the inner wall of the mounting housing 11 via a connecting shaft. By setting the first gear 16, the second gear 17, the sixth gear 27, the third gear 23, the fourth gear 24, and the fifth gear 25, the combination of the first gear 16, the second gear 17, the sixth gear 27, the third gear 23, the fourth gear 24, and the fifth gear 25 can simultaneously drive the first positive and negative lead screw 18 and the second positive and negative lead screw 26 to rotate in the same direction through a single servo motor 15, thereby making the entire automatic sealing mechanism 12 operate more stably.

[0032] The working principle of this utility model is as follows: The flange connection assembly 10 is fixed to the well base by bolts. By turning on the switch of the servo motor 15, the output end of the servo motor 15 drives the first gear 16 to start rotating. The first gear 16 drives the second gear 17 and the sixth gear 27 to start rotating. The second gear 17 and the sixth gear 27 drive the first forward and reverse screw 18 and the second forward and reverse screw 26 to start rotating. The left ends of the first forward and reverse screw 18 and the second forward and reverse screw 26 drive the first sealing plate 19 and the first rubber sealing gasket 20 to move to the right along the movable groove 14. The right ends of the first forward and reverse screw 18 and the second forward and reverse screw 26 drive the second sealing plate 21 and the second rubber sealing gasket 22 to move to the left along the movable groove 14. The first rubber sealing gasket 20 and the second rubber sealing gasket 22 come into close contact with each other, sealing the inner wall of the flange 13, thereby achieving the purpose of sealing the well.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-sealing well sealing device for oilfield well workover, comprising a flange connection assembly (10), characterized in that: An installation shell (11) is fixedly installed on the upper part of the outer wall of the flange connection assembly (10). An automatic sealing mechanism (12) is provided on the inner wall of the installation shell (11). The flange connection assembly (10) includes a flange (13). An movable groove (14) is opened on the left side wall of the flange (13). The automatic sealing mechanism (12) includes a servo motor (15). The right side wall of the servo motor (15) is fixedly connected to the left side wall of the installation shell (11). The output end of the servo motor (15) moves through the left side of the inner wall of the installation shell (11). A first gear (16) is fixedly installed on the output end of the servo motor (15) through a connecting shaft. A second gear (17) is movably meshed on the front end of the outer wall of the first gear (16). The left side wall of the second gear (17) is movably connected to the left side of the inner wall of the installation shell (11) through a connecting shaft.

2. The self-sealing well sealing device for oilfield well workover according to claim 1, characterized in that: The right side wall of the second gear (17) is fixedly installed with a first positive and negative screw (18). The left side of the outer wall of the first positive and negative screw (18) is threaded with a first sealing plate (19), and the outer wall of the first sealing plate (19) is movably connected to the inner wall of the flange (13) at the movable groove (14).

3. The self-sealing well sealing device for oilfield well workover according to claim 2, characterized in that: The first rubber sealing gasket (20) is fixedly installed on the right side wall of the first sealing plate (19), and the second sealing plate (21) is threadedly connected to the right side of the outer wall of the first positive and negative screw (18), and the outer wall of the second sealing plate (21) is movably connected to the inner wall of the flange (13) at the movable groove (14).

4. The self-sealing well sealing device for oilfield well workover according to claim 3, characterized in that: A second rubber sealing gasket (22) is fixedly installed on the left side wall of the second sealing plate (21).

5. The self-sealing well sealing device for oilfield well workover according to claim 2, characterized in that: A third gear (23) is fixedly installed on the right side wall of the first positive and negative lead screw (18), and the right side wall of the third gear (23) is movably connected to the right side of the inner wall of the mounting shell (11) through a connecting shaft.

6. The self-sealing well sealing device for oilfield well workover according to claim 5, characterized in that: The rear end of the outer wall of the third gear (23) is movably engaged with the fourth gear (24), and the right side wall of the fourth gear (24) is movably connected to the right side of the inner wall of the mounting shell (11) through a connecting shaft.

7. The self-sealing well sealing device for oilfield well workover according to claim 6, characterized in that: The rear end of the outer wall of the fourth gear (24) is movably engaged with the fifth gear (25), and the right side wall of the fifth gear (25) is movably connected to the right side of the inner wall of the mounting shell (11) through a connecting shaft.

8. The self-sealing well sealing device for oilfield well workover according to claim 7, characterized in that: The second positive and negative screw (26) is fixedly installed on the left side wall of the fifth gear (25), and the right side of the outer wall of the second positive and negative screw (26) is threadedly connected to the rear end of the inner wall of the second sealing plate (21), and the left side of the outer wall of the second positive and negative screw (26) is threadedly connected to the rear end of the inner wall of the first sealing plate (19).

9. The self-sealing well sealing device for oilfield well workover according to claim 8, characterized in that: The sixth gear (27) is fixedly installed on the left side wall of the second positive and negative lead screw (26), and the front end of the outer wall of the sixth gear (27) is movably meshed with the rear end of the outer wall of the first gear (16). The left side wall of the sixth gear (27) is movably connected to the left side of the inner wall of the mounting shell (11) through a connecting shaft.

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