Open hole well packer rubber sleeve

Abstract

The utility model relates to the technical field of packer rubber sleeves, and discloses an open hole well packer rubber sleeve which comprises a rubber sleeve body, a wear-resisting layer and a water blocking layer are fixedly connected in the rubber sleeve body, dispersion assemblies are arranged in the wear-resisting layer and the water blocking layer, each dispersion assembly comprises a plurality of aramid fiber ropes, and the aramid fiber ropes are arranged in the rubber sleeve body. The multiple aramid fiber ropes are fixedly connected to the interiors of the wear-resistant layer and the waterproof layer correspondingly, a compression-resistant layer is fixedly connected to the interior of the rubber barrel and used for increasing the compression-resistant degree of the rubber barrel, and a corrosion-resistant layer is fixedly connected to the interior of the rubber barrel. According to the utility model, the plurality of aramid ropes are arranged in the wear-resistant layer, the water-resistant layer, the compression-resistant layer and the corrosion-resistant layer, so that the wear-resistant layer, the water-resistant layer, the compression-resistant layer and the corrosion-resistant layer are firmer and more compression-resistant, and meanwhile, the rubber sleeve has wear resistance, water resistance, skid resistance and compression resistance as a whole under the action of the wear-resistant layer, the water-resistant layer, the compression-resistant layer and the corrosion-resistant layer.

Description

Technical Field

[0001] This utility model relates to the field of packer sleeve technology, and in particular to a packer sleeve for open-hole wells. Background Technology

[0002] Currently, packers are widely used in oilfield operations such as oil production, water injection, and fracturing to achieve downhole setting and isolation functions. A packer is an important downhole tool that effectively seals the annular space between the tubing and casing, thereby achieving the purpose of isolating different formations, stratified water injection, or stratified fracturing. In the working principle of a packer, its key component—the rubber sleeve—applies pressure by expanding outwards, tightly adhering to the well wall to achieve a seal in the annular space. Therefore, the performance of the rubber sleeve is crucial to the sealing effect of the packer, especially in high-pressure downhole operations, where the rubber sleeve not only needs to withstand the high pressure difference between the inside and outside of the well, but also needs to resist wear, deformation, or aging that occurs during long-term use.

[0003] Existing rubber packers generally suffer from poor durability in practical use, making it difficult to meet the demands of long-term, high-intensity operations under complex well conditions. Due to limitations in material properties and structural design, typical rubber packers are prone to aging, cracking, deformation, or damage under high pressure, high temperature, and corrosive environments. These problems directly affect the sealing performance of the packer, leading to sealing failure or frequent replacements during operation. This not only increases equipment maintenance costs but also causes operational interruptions, impacting oilfield production efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a packer sleeve for open-hole wells, aiming to improve the poor durability of the existing sleeves, which leads to easy aging, cracking, deformation and damage of the sleeves under high pressure, high temperature and corrosive environments.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A packer sleeve for open hole wells includes a sleeve with a wear-resistant layer and a water-blocking layer fixedly connected inside the sleeve, and both the wear-resistant layer and the water-blocking layer are provided with dispersion components.

[0007] The dispersion component includes aramid ropes, and multiple aramid ropes are specifically provided, with the multiple aramid ropes respectively fixedly connected to the interior of the wear-resistant layer and the water-blocking layer;

[0008] As a further description of the above technical solution:

[0009] The inside of the rubber tube is fixedly connected to a pressure-resistant layer, which is used to increase the pressure resistance of the rubber tube;

[0010] As a further description of the above technical solution:

[0011] The inside of the rubber tube is fixedly connected with a corrosion-resistant layer, which is used to increase the corrosion resistance of the rubber tube;

[0012] As a further description of the above technical solution:

[0013] The rubber tube is internally fixedly connected with a pressure-resistant layer and a corrosion-resistant layer;

[0014] As a further description of the above technical solution:

[0015] Both ends of the rubber tube are fixedly connected to connecting blocks, and multiple anti-slip textures are fixedly connected to the outer periphery of both connecting blocks.

[0016] As a further description of the above technical solution:

[0017] Multiple cushioning cotton bodies are fixedly connected inside the rubber tube;

[0018] As a further description of the above technical solution:

[0019] The outer wall of the rubber tube has multiple anti-slip grooves, which are used to make the rubber tube more airtight during use.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by installing multiple aramid ropes inside the wear-resistant layer, water-blocking layer, pressure-resistant layer, and corrosion-resistant layer, the wear-resistant layer, water-blocking layer, pressure-resistant layer, and corrosion-resistant layer are made more robust and pressure-resistant. At the same time, through the action of the wear-resistant layer, water-blocking layer, pressure-resistant layer, and corrosion-resistant layer, the rubber tube as a whole has wear resistance, water resistance, anti-slip and pressure resistance, thereby improving the overall durability of the rubber tube, thus improving the overall applicability and improving work efficiency.

[0022] 2. In this utility model, the connecting block and the anti-slip texture make the rubber tube more stable when connected and fixed, and make the connection stronger, thereby improving the stability of the packer during use and reducing the labor intensity of the operator. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of a packer sleeve for open-hole wells proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the anti-slip textured outer surface of the packer sleeve for open-hole wells proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the aramid rope structure of the packer sleeve for an open-hole well, as proposed in this utility model.

[0026] Legend:

[0027] 1. Rubber tube; 2. Anti-slip texture; 3. Connecting block; 5. Anti-slip outer texture; 6. Wear-resistant layer; 7. Water-blocking layer; 8. Pressure-resistant layer; 9. Corrosion-resistant layer; 10. Cushioning cotton body; 11. Aramid rope. Detailed Implementation

[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] Reference Figures 1-3 One embodiment of this utility model is a packer sleeve for open-hole wells, comprising a sleeve 1, wherein a wear-resistant layer 6 and a water-blocking layer 7 are fixedly connected inside the sleeve 1, and both the wear-resistant layer 6 and the water-blocking layer 7 are provided with dispersion components.

[0030] The wear-resistant layer 6 is made of polyurethane, which improves the overall high strength, wear resistance and tear resistance of the rubber sleeve 1, while the water-blocking layer 7 is made of fluororubber, which enables the rubber sleeve 1 to maintain long-term stability in high-pressure water and corrosive liquids.

[0031] The wear-resistant layer 6 is made of polyurethane. Polyurethane has excellent tear resistance and impact resistance, which can effectively resist wear and deformation caused by mechanical action in the high pressure and high friction environment downhole. Especially when the well wall is in long-term contact and frequent friction with the rubber sleeve 1, the high wear resistance of polyurethane ensures that the outer layer of the rubber sleeve 1 will not fail prematurely due to wear, thereby extending the service life of the packer.

[0032] The water-blocking layer 7 is made of fluororubber. Fluororubber can maintain long-term stability and impermeability in harsh environments such as downhole high-pressure water and corrosive media, preventing external liquids from corroding the internal materials of the rubber sleeve 1, thus preventing aging or failure. At the same time, fluororubber has excellent high-temperature resistance and can maintain good physical and chemical properties under high-temperature and high-pressure operating conditions, thereby ensuring that the function of the water-blocking layer 7 is not affected by environmental factors.

[0033] Reference Figure 3 The dispersion component includes aramid ropes 11, and multiple aramid ropes 11 are specifically provided. The multiple aramid ropes 11 are respectively fixedly connected to the inside of the wear-resistant layer 6 and the water-blocking layer 7.

[0034] Aramid rope 11 specifically uses aramid fiber as its main material. Aramid fiber is five times stronger than steel wire, exhibiting extremely excellent tensile strength. Even under high pressure and high load environments, it can withstand enormous tensile forces without breaking or deforming. At the same time, its modulus is more than ten times higher than that of ordinary fibers, which means it has extremely high rigidity and stability. When subjected to external forces, it can effectively disperse and resist stress, preventing local failure or overall damage to the structure.

[0035] Reference Figure 3 The rubber tube 1 has a pressure-resistant layer 8 fixedly connected inside, which increases the pressure resistance of the rubber tube 1. The rubber tube 1 also has a corrosion-resistant layer 9 fixedly connected inside, which increases the corrosion resistance of the rubber tube 1. The rubber tube 1 has both a pressure-resistant layer 8 and a corrosion-resistant layer 9 fixedly connected inside.

[0036] The compression layer 8 is made of carbon fiber composite material. Carbon fiber is a high-performance fiber material with carbon as the main component. It has extremely high strength and rigidity. Its tensile strength is much higher than that of traditional metal materials, while its density is only one-quarter that of steel. This high strength and low density characteristic allows the carbon fiber composite material to provide extremely high load-bearing capacity for the compression layer 8 without significantly increasing the overall weight of the rubber sleeve 1.

[0037] The corrosion-resistant layer 9 is made of polytetrafluoroethylene (PTFE), a highly chemically inert material that is almost completely unresponsive to most corrosive substances, including strong acids, strong alkalis, salt solutions, organic solvents, and hydrogen sulfide and carbon dioxide commonly found in oilfield environments.

[0038] Reference Figures 1-3 Both ends of the rubber tube 1 are fixedly connected to connecting blocks 3. Multiple anti-slip textures 5 are fixedly connected to the outer periphery of the two connecting blocks 3. Multiple buffer cotton bodies 10 are fixedly connected inside the rubber tube 1. Multiple anti-slip textures 2 are opened on the outer wall of the rubber tube 1, which are used to make the rubber tube 1 more airtight when in use.

[0039] The connecting block 3 and the anti-slip texture 5 facilitate the connection of the rubber cylinder 1 to the construction site. At the same time, the connecting block 3 and the anti-slip texture 5 make the rubber cylinder 1 more stable when it is connected and fixed, making the connection stronger and improving the stability of the packer during use, thereby reducing the labor intensity of the operators.

[0040] Working principle: By installing a wear-resistant layer 6, a water-blocking layer 7, a pressure-resistant layer 8, and a corrosion-resistant layer 9 inside the rubber tube 1, the rubber tube 1 becomes more durable during use. At the same time, multiple aramid ropes 11 are installed inside the wear-resistant layer 6, water-blocking layer 7, pressure-resistant layer 8, and corrosion-resistant layer 9. Under the action of the multiple aramid ropes 11, the wear-resistant layer 6, water-blocking layer 7, pressure-resistant layer 8, and corrosion-resistant layer 9 can be further supported and stabilized. The rubber tube 1 can be connected and installed as a whole through the connecting block 3 and the anti-slip texture 5. At the same time, the connection of the rubber tube 1 is more secure and durable under the action of the connecting block 3 and the anti-slip texture 5.

[0041] 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 packer sleeve for open-hole wells, comprising a sleeve (1), characterized in that: The rubber sleeve (1) is fixedly connected with a wear-resistant layer (6) and a water-blocking layer (7), and both the wear-resistant layer (6) and the water-blocking layer (7) are provided with dispersion components. The dispersion component includes aramid ropes (11), and there are multiple aramid ropes (11). The multiple aramid ropes (11) are respectively fixedly connected inside the wear-resistant layer (6) and the water-blocking layer (7).

2. The packer sleeve for open-hole wells according to claim 1, characterized in that: The rubber tube (1) is fixedly connected to an anti-compression layer (8), which is used to increase the compressive strength of the rubber tube (1).

3. The packer sleeve for open-hole wells according to claim 1, characterized in that: The rubber tube (1) has a corrosion-resistant layer (9) fixedly connected inside, which increases the corrosion resistance of the rubber tube (1).

4. The packer sleeve for open-hole wells according to claim 1, characterized in that: The rubber tube (1) is fixedly connected with a pressure-resistant layer (8) and a corrosion-resistant layer (9).

5. The packer sleeve for open-hole wells according to claim 1, characterized in that: Both ends of the rubber tube (1) are fixedly connected to connecting blocks (3), and multiple anti-slip textures (5) are fixedly connected to the outer periphery of the two connecting blocks (3).

6. The packer sleeve for open-hole wells according to claim 1, characterized in that: Multiple cushioning cotton bodies (10) are fixedly connected inside the rubber tube (1).

7. The packer sleeve for open-hole wells according to claim 1, characterized in that: The outer wall of the rubber tube (1) is provided with multiple anti-slip textures (2), which are used to make the rubber tube (1) more airtight during use.

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