Pressure-resistant sealing assembly of bridge plug

Abstract

The utility model discloses a pressure-resistant sealing assembly of a bridge plug, and particularly relates to the technical field of bridge plug sealing. The protection part comprises an outer rubber barrel arranged outside the bridge plug in a sleeving mode and two fixing barrels, the two fixing barrels are arranged at the top end and the bottom end of the outer rubber barrel correspondingly, and multiple sets of positioning parts used for enhancing stability are arranged on the sides, close to the outer rubber barrel, of the fixing barrels; each group of positioning pieces comprises a positioning hole, the positioning hole is formed in one side, close to the outer rubber barrel, of the fixing barrel, and a touch plate is rotationally connected into the positioning hole. According to the utility model, the contact plate is rotationally connected with the fixed cylinder, so that when the contact plate and the outer top ring do relative motion, the contact plate drives the pressing plate to be in contact with the outer rubber cylinder, the pressing plate can apply an extrusion force from outside to inside to the outer rubber cylinder, and the outer rubber cylinder can be synchronously subjected to radial pressure and longitudinal pressure by virtue of fixed limiting of the limiting ring seat; therefore, the stability and the sealing performance of the outer rubber sleeve are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of bridge plug sealing technology, and more specifically to a pressure-resistant sealing component for bridge plugs. Background Technology

[0002] In the fields of oil and natural gas extraction and various pipeline transportation systems, bridge plugs are widely used as a key sealing tool in wellbore plugging, pipeline maintenance, and other operations. Their main function is to effectively seal wellbores or pipelines at specific locations to achieve purposes such as isolating different sections, controlling fluid flow direction, and facilitating subsequent construction operations.

[0003] With the continuous development of the energy extraction industry and the increasing demands for the safety and reliability of pipeline systems, more stringent challenges are being placed on the performance of bridge plugs. Especially under high-pressure environments, it is essential to ensure the pressure resistance of the sealing components on the bridge plug.

[0004] As shown in the prior art published in CN208858322U, although this prior art seals the channel by compressing the sealing component, fixing the bridge plug position with the slip component, preventing the sealing component from rebounding, using high-strength aluminum for the central tube which has high strength and pressure resistance at high temperatures, using composite materials for other components except the central tube, and having an easy-grinding structure between each component to make the bridge plug easy to grind, and having a large-diameter central tube with a small tool outer diameter for greater reliability during insertion, the large diameter allows for normal production without drilling in the early stages. However, the rubber sleeve in this prior art is only subjected to force in one direction, making it prone to shaking, which in turn affects the sealing performance and stability of the rubber sleeve. Utility Model Content

[0005] Therefore, this utility model provides a pressure-resistant sealing component for a bridge plug to solve the problem in the prior art that the rubber tube is still prone to shaking due to only unidirectional force, which affects stability and sealing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure-resistant sealing assembly for a bridge plug, including a protective component installed on the bridge plug for sealing;

[0007] The protective component includes an outer rubber sleeve fitted over the bridge plug and two fixing sleeves. The two fixing sleeves are respectively located at the top and bottom of the outer rubber sleeve, and multiple sets of positioning elements for enhancing stability are provided on the side of the fixing sleeves close to the outer rubber sleeve.

[0008] Each positioning component includes a positioning hole, which is located on the side of the fixed cylinder near the outer rubber cylinder. A contact plate is rotatably connected inside the positioning hole, and a pressure plate is installed on the side of the contact plate away from the positioning hole.

[0009] The outer rubber tube is equipped with a top pressure member for actuating the contact plate on the side near the fixed tube.

[0010] Furthermore, the top pressing component includes an inner sealing ring and an outer top ring, the outer top ring being sleeved on the outside of the inner sealing ring near the end of the outer rubber tube, and both the inner sealing ring and the outer top ring being installed on the side of the outer rubber tube near the fixed tube;

[0011] The inner sealing ring and the outer top ring are both located inside the fixed cylinder at the ends away from the outer rubber cylinder, and the end of the outer top ring away from the rubber cylinder is in contact with the contact plate.

[0012] Furthermore, a fixing shaft is installed on both sides of the touch plate, and a fixing hole is opened on one side of the fixing cylinder corresponding to the fixing shaft. The fixing hole is connected to the positioning hole, and the end of the fixing shaft away from the touch plate extends into the fixing hole.

[0013] Furthermore, the outer rubber cylinder is provided with a support ring installed outside the bridge plug, and a support ring groove is provided on one side of the outer rubber cylinder corresponding to the support ring, and the support ring is located inside the support ring groove.

[0014] Furthermore, a limiting ring seat is provided on the side of the fixed cylinder away from the outer rubber cylinder, and the limiting ring seat is installed outside the bridge plug.

[0015] Furthermore, the outer rubber tube has multiple partition ring grooves on its exterior, and the multiple partition ring grooves are evenly spaced apart.

[0016] Furthermore, the cross-section of the positioning hole is L-shaped.

[0017] Furthermore, both the fixing cylinder and the outer rubber cylinder are made of carbon fiber reinforced polymer material.

[0018] This utility model has the following advantages:

[0019] By rotating the contact plate and the fixed cylinder, when the contact plate moves relative to the outer top ring, the contact plate drives the pressure plate to contact the outer rubber cylinder, so that the pressure plate can apply a squeezing force from the outside to the inside to the outer rubber cylinder. Then, by the fixed limit of the limiting ring seat, the outer rubber cylinder can be subjected to radial pressure and longitudinal pressure simultaneously, thereby enhancing the stability and sealing of the outer rubber cylinder. Attached Figure Description

[0020] 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.

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is an exploded view of the outer rubber tube of this utility model;

[0024] Figure 3 This is a side sectional view of the fixing cylinder of this utility model;

[0025] Figure 4 This is a side sectional view of the positioning hole of this utility model;

[0026] Figure 5 This is a side sectional view of the outer rubber tube of this utility model.

[0027] In the diagram: 1. Outer rubber sleeve; 2. Fixed sleeve; 3. Positioning hole; 4. Contact plate; 5. Pressure plate; 6. Inner sealing ring; 7. Outer top ring; 8. Fixed shaft; 9. Fixed hole; 10. Support ring; 11. Support ring groove; 12. Limiting ring seat; 13. Separating ring groove. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Refer to the instruction manual appendix Figure 1-5 This utility model provides a pressure-resistant sealing assembly for a bridge plug, including a protective component installed on the bridge plug for sealing;

[0030] The protective component includes an outer rubber sleeve 1 fitted over the bridge plug and two fixed sleeves 2. The two fixed sleeves 2 are respectively located at the top and bottom of the outer rubber sleeve 1, and multiple sets of positioning elements for enhancing stability are provided on the side of the fixed sleeve 2 near the outer rubber sleeve 1. Each set of positioning elements includes a positioning hole 3, which is located on the side of the fixed sleeve 2 near the outer rubber sleeve 1. A contact plate 4 is rotatably connected inside the positioning hole 3, and a pressure plate 5 is installed on the side of the contact plate 4 away from the positioning hole 3. A pressing element for actuating the contact plate 4 is installed on the side of the outer rubber sleeve 1 near the fixed sleeve 2. The pressing element includes an inner sealing ring 6 and an outer top ring 7. The outer top ring 7 is fitted over the outer end of the inner sealing ring 6 near the outer rubber sleeve 1, and both the inner sealing ring 6 and the outer top ring 7 are installed on the side of the outer rubber sleeve 1 near the fixed sleeve 2. The ends of the inner sealing ring 6 and the outer top ring 7 away from the outer rubber sleeve 1 are located inside the fixed sleeve 2, and the end of the outer top ring 7 away from the rubber sleeve contacts the contact plate 4.

[0031] In use, when the fixed cylinder 2 is pressed, it causes the contact plate 4 to contact the outer top ring 7 on the outer rubber cylinder 1. The outer top ring 7 and the rotatably connected contact plate 4 move relative to each other, causing the contact plate 4 to rotate and causing the pressure plate 5 to contact the outside of the outer top ring 7. Thus, the pressure plate 5 can apply a compressive force from the outside to the inside to the outer rubber cylinder 1. The setting of multiple positioning parts can limit the outer rubber cylinder 1 in multiple directions. Among them, since the fixed cylinder 2 is provided with a limiting ring seat 12 on the side away from the outer rubber cylinder 1, and the limiting ring seat 12 is installed outside the bridge plug, the limiting ring seat 12 can limit the fixed cylinder 2 and the outer rubber cylinder 1. In this way, the outer rubber cylinder 1 can be subjected to radial pressure and longitudinal pressure simultaneously, which enhances the stability and sealing performance of the outer rubber cylinder 1. Furthermore, since multiple partition ring grooves 13 are opened on the outside of the outer rubber cylinder 1, and the multiple partition ring grooves 13 are evenly distributed, the outer rubber cylinder 1 can achieve a multi-layer sealing effect, thereby enhancing the sealing performance.

[0032] In order to achieve the effect of the contact plate 4 driving the pressure plate 5 to apply pressure to the outer rubber cylinder 1, the contact plate 4 needs to be able to drive the pressure plate 5 to rotate, such as... Figure 3 and 4 As shown, fixed shafts 8 are installed on both sides of the contact plate 4, and a fixed hole 9 is opened on one side of the fixed cylinder 2 corresponding to the fixed shaft 8. The fixed hole 9 is connected to the positioning hole 3. The end of the fixed shaft 8 away from the contact plate 4 extends into the fixed hole 9. Because the fixed shafts 8 are installed on both sides of the contact plate 4 and the fixed shafts 8 are movably connected to the fixed hole 9, the contact plate 4 can rotate around the fixed shaft 8 as the center, thereby allowing the contact plate 4 to drive the pressure plate 5 to squeeze and limit the outer rubber cylinder 1. Furthermore, because the cross-section of the positioning hole 3 is L-shaped, the pressure plate 5 has space to rotate, ensuring the smooth rotation of the pressure plate 5. Both the fixed cylinder 2 and the outer rubber cylinder 1 are made of carbon fiber reinforced polymer material, which has high strength and modulus, and can effectively improve the pressure resistance of the fixed cylinder 2 and the outer rubber cylinder 1.

[0033] To ensure the stability of the outer rubber sleeve 1, it is necessary to enhance the tightness of the connection between the outer rubber sleeve 1 and the bridge plug, such as... Figure 5 As shown, the outer rubber cylinder 1 has a support ring 10 installed on the outside of the bridge plug inside, and a support ring groove 11 is opened on one side of the outer rubber cylinder 1 corresponding to the support ring 10. The support ring 10 is located inside the support ring groove 11. Through the connection between the support ring 10 and the bridge plug, the outer rubber cylinder 1 can be engaged with the support ring 10 through the support ring groove 11, thereby limiting the position of the outer rubber cylinder 1 and ensuring the stability of the outer rubber cylinder 1.

[0034] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A pressure-resistant sealing assembly for a bridge plug, characterized in that: This includes protective components installed on the bridge plug for sealing; The protective component includes an outer rubber sleeve (1) sleeved on the outside of the bridge plug and two fixed sleeves (2). The two fixed sleeves (2) are respectively located at the top and bottom of the outer rubber sleeve (1), and multiple sets of positioning components for enhancing stability are provided on the side of the fixed sleeve (2) close to the outer rubber sleeve (1). Each positioning component includes a positioning hole (3), which is located on the side of the fixed cylinder (2) near the outer rubber cylinder (1). A contact plate (4) is rotatably connected inside the positioning hole (3), and a pressure plate (5) is installed on the side of the contact plate (4) away from the positioning hole (3). The outer rubber tube (1) is equipped with a top pressure member for actuating the touch plate (4) on the side near the fixed tube (2).

2. The pressure-resistant sealing assembly for the bridge plug according to claim 1, characterized in that: The top pressing component includes an inner sealing ring (6) and an outer top ring (7). The outer top ring (7) is sleeved on the outside of the inner sealing ring (6) near the outer rubber cylinder (1), and both the inner sealing ring (6) and the outer top ring (7) are installed on the side of the outer rubber cylinder (1) near the fixed cylinder (2). The inner sealing ring (6) and the outer top ring (7) are both located inside the fixed cylinder (2) at the ends away from the outer rubber tube (1), and the end of the outer top ring (7) away from the rubber tube is in contact with the contact plate (4).

3. The pressure-resistant sealing assembly for the bridge plug according to claim 1, characterized in that: The touch plate (4) is equipped with a fixing shaft (8) on both sides, and the fixing cylinder (2) has a fixing hole (9) on one side corresponding to the fixing shaft (8). The fixing hole (9) is connected to the positioning hole (3), and the end of the fixing shaft (8) away from the touch plate (4) extends into the fixing hole (9).

4. The pressure-resistant sealing assembly for the bridge plug according to claim 1, characterized in that: The outer rubber cylinder (1) is provided with a support ring (10) installed outside the bridge plug, and a support ring groove (11) is provided on one side of the outer rubber cylinder (1) corresponding to the support ring (10), and the support ring (10) is located inside the support ring groove (11).

5. The pressure-resistant sealing assembly for the bridge plug according to claim 1, characterized in that: The fixed cylinder (2) is provided with a limiting ring seat (12) on the side away from the outer rubber cylinder (1), and the limiting ring seat (12) is installed on the outside of the bridge plug.

6. The pressure-resistant sealing assembly for the bridge plug according to claim 1, characterized in that: The outer rubber tube (1) has multiple partition ring grooves (13) on its outside, and the multiple partition ring grooves (13) are evenly spaced apart.

7. The pressure-resistant sealing assembly for the bridge plug according to claim 1, characterized in that: The cross-section of the positioning hole (3) is L-shaped.

8. The pressure-resistant sealing assembly for the bridge plug according to claim 1, characterized in that: Both the fixed cylinder (2) and the outer rubber cylinder (1) are made of carbon fiber reinforced polymer material.

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