Carbon fiber reinforced seal ring assembly for composite bridge plug

Abstract

A kind of carbon fiber reinforced sealing ring assembly of composite bridge plug, including mounting ring, the inner side of mounting ring is provided with a circle of adjusting gasket, the outer side of mounting ring is provided with a circle of slip, each slip is correspondingly provided with a limit block on the rear side of mounting ring.The inner side of mounting ring is provided with a circle of adjusting gasket, adjusting gasket is detachable structure, can select the adjusting gasket of suitable thickness according to the diameter of existing bridge plug, so that mounting ring can be conveniently fixed to existing bridge plug, strengthen the sealing effect of existing bridge plug;The top of the upper mounting groove of slip is fixed with a carbon fiber sealing block, the side mounting groove of the both sides of slip is installed with water-swelling rubber sealing block, fixed by the slip of composite structure and passage inner wall, greatly improve the sealing and fixing effect of sealing ring assembly, also improve the sealing and fixing effect of existing bridge plug with carbon fiber reinforced sealing ring assembly installed.

Description

Technical Field

[0001] This utility model belongs to the field of bridge plug technology, specifically relating to a carbon fiber reinforced sealing ring assembly for a composite bridge plug. Background Technology

[0002] In oil and gas field development, composite bridge plugs are core tools for fracturing and plugging operations, and their sealing performance directly affects the success rate of operations and downhole safety. Traditional bridge plug sealing structures mostly use rubber or metal materials. Rubber sealing rings are prone to creep, hardening, or thermal decomposition at high temperatures (>150℃), leading to seal failure. Although metal sealing rings are resistant to high pressure, their high elastic modulus makes them prone to fretting wear when in contact with the wellbore or casing, causing scratches on the sealing surface. Therefore, designing a composite sealing component that can be easily installed on existing bridge plugs can greatly enhance the sealing effect of existing bridge plugs. This has become a technical problem that needs to be solved. Utility Model Content

[0003] This utility model provides a carbon fiber reinforced sealing ring assembly for a composite bridge plug. The inner side of the mounting ring is provided with an adjusting shim, which is detachable. The shim thickness can be selected according to the diameter of the existing bridge plug, allowing the mounting ring to be easily fixed to the existing bridge plug and enhancing its sealing effect. A carbon fiber sealing block is fixed in the upper mounting groove on the top of the slip, and water-swellable rubber sealing blocks are installed in the side mounting grooves on both sides of the slip. The composite structure of the slip and its fixation to the inner wall of the channel greatly improves the sealing and fixing effect of the sealing ring assembly, and also enhances the sealing and fixing effect of the existing bridge plug with the carbon fiber reinforced sealing ring assembly.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A carbon fiber reinforced sealing ring assembly for a composite bridge plug includes a mounting ring, an adjusting shim on the inner side of the mounting ring, and a retaining ring on the outer side of the mounting ring. A limiting block is correspondingly provided on the mounting ring on the rear side of each retaining ring. An upper mounting groove is formed on the top of each retaining ring, and a carbon fiber sealing block is provided in the upper mounting groove. An mounting slot is formed on the inner side of the mounting ring, and the adjusting shim is fixed on the mounting slot.

[0006] The adjusting shim is provided with a rotating shaft, the bottom of which is flush with the bottom surface of the adjusting shim. The bottom of the rotating shaft is provided with an internal hexagonal groove, and the rotating shaft is provided with a horizontally positioned locking shaft.

[0007] The clasp has side mounting grooves on its left and right sides, and each side mounting groove is equipped with a water-swellable rubber sealing block.

[0008] The mounting groove on the inner side of the mounting ring is a T-shaped mounting groove.

[0009] The adjusting shim is either a rubber adjusting shim or a metal adjusting shim.

[0010] The mounting ring is a metal structure mounting ring or a carbon fiber structure mounting ring.

[0011] The clapper is a carbon fiber structure clapper.

[0012] The beneficial effects of this utility model using the above technical solution are as follows: An adjusting shim is provided on the inner side of the mounting ring. The adjusting shim is detachable, and an adjusting shim of appropriate thickness can be selected according to the diameter of the existing bridge plug, allowing the mounting ring to be easily fixed onto the existing bridge plug, thus enhancing the sealing effect of the existing bridge plug. By rotating the shaft on the adjusting shim 90° with a hexagonal wrench, the snap-fit ​​shaft on the shaft can easily engage with the mounting slot on the inner side of the mounting ring, facilitating the installation and removal of the adjusting shim. A carbon fiber sealing block is fixed in the upper mounting groove at the top of the clamp, and water-swellable rubber sealing blocks are installed in the side mounting grooves on both sides of the clamp. The composite structure of the clamp and its fixation to the inner wall of the channel greatly improves the sealing and fixing effect of the sealing ring assembly, and also improves the sealing and fixing effect of the existing bridge plug with the carbon fiber reinforced sealing ring assembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the mounting ring in this utility model;

[0015] Figure 3 This is a schematic diagram of the mounting ring without the adjusting shims in this utility model;

[0016] Figure 4 for Figure 3 A sectional view;

[0017] Figure 5 This is a schematic diagram of the structure of the adjusting shim in this utility model. Figure 1 ;

[0018] Figure 6 This is a schematic diagram of the structure of the adjusting shim in this utility model. Figure 2 ;

[0019] Figure 7 This is a schematic diagram of the structure of the chuck in this utility model.

[0020] Mounting ring 1, adjusting shim 2, clip 3, limit block 4, carbon fiber sealing block 5, mounting groove 6, rotating shaft 7, snap-fit ​​shaft 8, water-swellable rubber sealing block 9. Detailed Implementation

[0021] In the description 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 this utility model based on the specific circumstances.

[0022] 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 scope of protection of the present utility model.

[0023] like Figures 1-7 As shown, a carbon fiber reinforced sealing ring assembly for a composite bridge plug includes a mounting ring 1. An adjusting shim 2 is provided on the inner side of the mounting ring 1, and a retaining plate 3 is provided on the outer side of the mounting ring 1. A limiting block 4 is correspondingly provided on the mounting ring 1 behind each retaining plate 3. An upper mounting groove is formed on the top of each retaining plate 3, and a carbon fiber sealing block 5 is provided within the upper mounting groove. An mounting slot 6 is formed on the inner side of the mounting ring 1, and the adjusting shim 2 is fixed to the mounting slot 6.

[0024] A rotating shaft 7 is provided on the adjusting shim 2. The bottom of the rotating shaft 7 is flush with the bottom surface of the adjusting shim 2. The bottom of the rotating shaft 7 is provided with an internal hexagonal groove. The rotating shaft 7 is provided with a horizontally set snap-fit ​​shaft 8.

[0025] The Kava 3 has side mounting grooves on both the left and right sides, and each side mounting groove is equipped with a water-swellable rubber sealing block 9.

[0026] The mounting slot 6 on the inner side of the mounting ring 1 is a T-shaped mounting slot.

[0027] Adjusting shim 2 is an adjusting shim with a rubber structure or an adjusting shim with a metal structure.

[0028] Mounting ring 1 is a mounting ring with a metal structure or a mounting ring with a carbon fiber structure.

[0029] Kava 3 is a carbon fiber structured Kava. Example

[0030] Insert the mounting ring 1 into the existing bridge plug body. The gap between the mounting ring 1 and the bridge plug can be compensated by adjusting the shim 2, so that the mounting ring 1 is firmly fixed to the existing bridge plug body.

[0031] The adjusting shim 2 is a detachable structure. By rotating the shaft 7 on the adjusting shim 2 by 90° with a hex wrench, the snap-fit ​​shaft 8 on the shaft 7 can be easily engaged with the mounting slot 6 on the inner side of the mounting ring 1, which facilitates the installation and removal of the adjusting shim 2 and allows the mounting ring 1 to be adapted to different models of bridge plugs by using different models of adjusting shims 2.

[0032] By pumping the bridge plug to the target layer and applying axial pressure, the slip 3 expands radially under the constraint of the limiting block 4, and the carbon fiber sealing block 5 forms an initial seal with the inner wall of the casing. When the downhole fluid seeps into the installation groove, the water-swellable rubber sealing block 9 expands in volume, filling the gap between the slip 3 and the casing, compensating for the initial sealing effect. The carbon fiber sealing block 5 provides a rigid seal, and the water-swellable rubber forms a flexible seal, reducing the leakage rate from 5% of the traditional bridge plug to below 0.2%.

[0033] The adjusting shim 2 of the mounting ring 1 of the sealing ring assembly adopts a modular design, which can be adapted to the enhanced sealing requirements of most bridge plugs on the market.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A carbon fiber reinforced sealing ring assembly for a composite bridge plug, characterized in that: The device includes a mounting ring, an adjusting shim on the inner side of the mounting ring, and a retaining ring on the outer side of the mounting ring. Each retaining ring has a corresponding limiting block on the rear side of the mounting ring. Each retaining ring has an upper mounting groove on its top, and a carbon fiber sealing block is provided in the upper mounting groove. The mounting ring has a mounting slot on its inner side, and the adjusting shim is fixed in the mounting slot.

2. The carbon fiber reinforced sealing ring assembly for a composite bridge plug according to claim 1, characterized in that: The adjusting shim is provided with a rotating shaft, the bottom of which is flush with the bottom surface of the adjusting shim. The bottom of the rotating shaft is provided with an internal hexagonal groove, and the rotating shaft is provided with a horizontally positioned locking shaft.

3. The carbon fiber reinforced sealing ring assembly for a composite bridge plug according to claim 2, characterized in that: The clasp has side mounting grooves on its left and right sides, and each side mounting groove is equipped with a water-swellable rubber sealing block.

4. The carbon fiber reinforced sealing ring assembly for a composite bridge plug according to claim 3, characterized in that: The mounting groove on the inner side of the mounting ring is a T-shaped mounting groove.

5. The carbon fiber reinforced sealing ring assembly for a composite bridge plug according to claim 4, characterized in that: The adjusting shim is either a rubber adjusting shim or a metal adjusting shim.

6. The carbon fiber reinforced sealing ring assembly for a composite bridge plug according to claim 5, characterized in that: The mounting ring is a metal structure mounting ring or a carbon fiber structure mounting ring.

7. The carbon fiber reinforced sealing ring assembly for a composite bridge plug according to claim 1, characterized in that: The clapper is a carbon fiber structure clapper.

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