Thermal stress compensator of oil exploitation equipment

Abstract

The thermal stress compensator of the oil exploitation equipment comprises a first sleeve and a second sleeve, the first sleeve is inserted into the second sleeve, connecting flanges are arranged at the two ends of the first sleeve and the two ends of the second sleeve respectively, mounting bases are arranged on the surfaces of the connecting flanges, glands are arranged in the mounting bases, and the glands are connected with the first sleeve and the second sleeve respectively. And the gland is fixedly connected with the mounting seat through a bolt. A plurality of mesh pad bodies and mesh pad base bodies are arranged between a first end cover and a second end cover, inner holes are formed between the first end cover and the second end cover, inner sleeves are installed in the inner holes, certain connecting gaps exist between the two ends of each inner sleeve and a connecting pipeline, and the mesh pad base bodies are composed of a plurality of mesh pads. The two ends of each mesh pad are provided with a clamping groove and a clamping block which are embedded with each other respectively, so that mesh pad base bodies of columnar structures are formed among the mesh pads, compensation gaps are formed among the mesh pad base bodies of the embedded structures, and thermal strain can be effectively resisted.

Description

Technical Field

[0001] This utility model relates to the field of thermal stress compensators, and more specifically to a thermal stress compensator for oil extraction equipment. Background Technology

[0002] Oil extraction primarily refers to the process of extracting crude oil from underground reservoirs. This crude oil is typically stored in porous rock layers, known as reservoirs. The core objective of oil extraction is to efficiently and safely extract as much crude oil as possible from these reservoirs. Oil extraction faces numerous challenges, including geological complexity, environmental sensitivity, and economic feasibility. Geological complexity is reflected in the significant differences in reservoir characteristics across different regions, such as permeability, porosity, and fluid properties, all of which directly affect the difficulty and efficiency of extraction. Simultaneously, oil extraction activities can also impact the local environment, such as land degradation, water pollution, and air pollution, thus requiring strict environmental protection measures.

[0003] During crude oil extraction, casing damage is severe in heavy and extra-heavy oil thermal recovery wells or wells with high sand content, necessitating the use of pipeline compensators. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to provide a thermal stress compensator for oil extraction equipment, which solves the problem of severe casing damage in heavy oil and extra-heavy oil thermal extraction wells or oil wells with high sand content during crude oil extraction.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a thermal stress compensator for oil extraction equipment, comprising: a first sleeve and a second sleeve, the first sleeve being inserted into the interior of the second sleeve and having connecting flanges at both ends of the first and second sleeves, a mounting seat being provided on the surface of the connecting flange and a pressure cap being provided inside the mounting seat, the pressure cap being fixedly connected to the mounting seat by bolts, and a connecting pipe being provided inside the pressure cap, a first end cap being provided inside the first sleeve and a second end cap being provided inside the second sleeve, a plurality of sets of mesh pads being provided between the first end cap and the second end cap, and an inner hole being provided between the mesh pad base, the first end cap, and the second end cap, with an inner sleeve installed in the inner hole, the mesh pad base being composed of a plurality of sets of mesh pads, and each end of the mesh pad being provided with a mutually interlocking snap-fit ​​groove and a snap-fit ​​block, the plurality of sets of mesh pads forming a columnar structure of the mesh pad base.

[0006] In a preferred embodiment of this utility model, the connecting flange is provided with a connecting column inside, and the two ends of the connecting column are provided with fixing nuts.

[0007] In a preferred embodiment of the present invention, the mounting base is provided with a sealing ring inside and the sealing ring wraps around the connecting end surface of the pressure cap.

[0008] In a preferred embodiment of this utility model, the connecting pipe and the gland are threaded together.

[0009] In a preferred embodiment of this utility model, the surfaces of the first end cap and the second end cap are provided with slots and snap-fit ​​protrusions that match the mesh pad.

[0010] In a preferred embodiment of this utility model, there is a certain connection gap between the two ends of the inner sleeve and the connecting pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model includes a first sleeve and a second sleeve. The first sleeve is inserted into the second sleeve, and connecting flanges are provided at both ends of the first and second sleeves. A mounting seat is provided on the surface of the connecting flange, and a pressure cap is provided inside the mounting seat. The pressure cap is fixedly connected to the mounting seat by bolts. A connecting pipe is provided inside the pressure cap. A first end cap is provided inside the first sleeve, and a second end cap is provided inside the second sleeve. Several sets of mesh pads are provided between the first end cap and the second end cap. An inner hole is provided between the mesh pad base, the first end cap, and the second end cap, and an inner sleeve is installed in the inner hole. There is a certain connection gap between the two ends of the inner sleeve and the connecting pipe. The several sets of mesh pad bases are composed of several sets of mesh pads. The two ends of the mesh pads are respectively provided with interlocking snap grooves and snap blocks, so that the several sets of mesh pads form a columnar structure mesh pad base. The interlocking structure of the mesh pad bases forms a compensating gap, which can effectively resist thermal strain. Attached Figure Description

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

[0014] Figure 2 This is a front view structural diagram of the present invention;

[0015] Figure 3 This is a schematic cross-sectional view of the present invention.

[0016] Figure 4 This is a schematic diagram of the end cap structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the mesh substrate structure of this utility model.

[0018] In the diagram: 1. First sleeve; 2. Second sleeve; 3. Connecting flange; 4. Connecting column; 5. Fixing nut; 6. Gland; 7. Connecting pipe; 8. Mounting seat; 9. First end cap; 10. Second end cap; 11. Sealing ring; 12. Mesh pad base; 13. Inner sleeve; 14. Slot; 15. Snap-fit ​​protrusion; 16. Snap-fit ​​groove; 17. Snap-fit ​​block; 18. Inner hole. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-5This utility model provides a technical solution: a thermal stress compensator for oil extraction equipment, comprising: a first sleeve 1 and a second sleeve 2, the first sleeve 1 being inserted into the interior of the second sleeve 2, and connecting flanges 3 being provided at both ends of the first sleeve 1 and the second sleeve 2, the surface of the connecting flange 3 being provided with a mounting seat 8, and a pressure cap 6 being provided inside the mounting seat 8, the pressure cap 6 being fixedly connected to the mounting seat 8 by bolts, and a connecting pipe 7 being provided inside the pressure cap 6, the interior of the first sleeve 1 being provided with a first end cap 9, and the interior of the second sleeve 2 being provided with a second end cap 10, a plurality of sets of mesh pads being provided between the first end cap 9 and the second end cap 10, and an inner hole 18 being provided between the mesh pad base 12, the first end cap 9, and the second end cap 10, with an inner sleeve 13 installed in the inner hole 18, the mesh pad base 12 being composed of a plurality of sets of mesh pads, the two ends of the mesh pads being respectively provided with interlocking snap grooves 16 and snap blocks 17, the plurality of sets of mesh pads forming a columnar structure in the mesh pad base 12, including the first sleeve 1. The first sleeve 1 is inserted into the second sleeve 2, and both ends of the first sleeve 1 and the second sleeve 2 are provided with connecting flanges 3. A mounting seat 8 is provided on the surface of the connecting flange 3, and a pressure cap 6 is provided inside the mounting seat 8. The pressure cap 6 is fixedly connected to the mounting seat 8 by bolts. A connecting pipe 7 is provided inside the pressure cap 6. A first end cap 9 is provided inside the first sleeve 1, and a second end cap 10 is provided inside the second sleeve 2. Several meshes are provided between the first end cap 9 and the second end cap 10. The mat body 12, the first end cap 9, and the second end cap 10 are all provided with an inner hole 18, and an inner sleeve 13 is installed in the inner hole 18. There is a certain connection gap between the two ends of the inner sleeve 13 and the connecting pipe 7. The mat body 12 is composed of several sets of mats. The two ends of the mats are respectively provided with interlocking snap grooves 16 and snap blocks 17, so that the mat body 12 with columnar structure is formed between the several sets of mats. The interlocking structure of the mat body 12 forms a compensation gap, which can effectively resist thermal strain.

[0021] Further improvements, such as Figure 1 As shown: The connecting flange 3 is provided with a connecting column 4 inside, and the two ends of the connecting column 4 are provided with fixing nuts 5. The connection tightness can be easily adjusted by fixing nuts 5 to ensure that the equipment will not loosen due to vibration or external force during operation.

[0022] Further improvements, such as Figure 3 As shown: The mounting base 8 is provided with a sealing ring 11 inside, and the sealing ring 11 wraps around the connecting end surface of the pressure cover 6. The sealing ring 11 effectively improves the sealing performance between the pressure cover 6 and the mounting base 8, preventing the leakage of oil or gas, thereby ensuring the normal operation of the thermal stress compensator.

[0023] Further improvements, such as Figure 2 As shown: The connecting pipe 7 and the pressure cap 6 are connected by a thread. The threaded connection makes it easier and faster to disassemble and assemble the connecting pipe 7 and the pressure cap 6, which facilitates the maintenance and replacement of the equipment.

[0024] Further improvements, such as Figure 4 As shown: The surfaces of the first end cover 9 and the second end cover 10 are provided with slots 14 and snap-fit ​​protrusions 15 that match the mesh pad. The mesh pad can be firmly snapped between the first end cover 9 and the second end cover 10, preventing the mesh pad from falling off or shifting due to vibration or external force during equipment operation.

[0025] Further improvements, such as Figure 3 As shown: There is a certain connection gap between the two ends of the inner sleeve 13 and the connecting pipe 7. The existence of the connection gap allows the inner sleeve 13 to have a certain degree of freedom during equipment operation, thereby adapting to the thermal strain caused by temperature changes.

[0026] Working principle: The thermal stress compensator is installed in the pipeline system of the oil extraction equipment through the connecting flange 3 and the fixing nut 5, ensuring a tight and stable connection. The connecting pipe 7 is connected to the gland 6 through a threaded connection, and the sealing ring 11 is checked to ensure it is intact and tightly fitted between the gland 6 and the mounting seat 8. During oil extraction, when thermal strain occurs in heavy oil or extra-heavy oil thermal recovery wells and oil wells with high sand content, the connection gap at both ends of the inner sleeve 13 allows it a certain degree of freedom to adapt to this change. Several sets of mesh pads are attached to the substrate 12, which consists of several sets of mesh pads. The mesh pads are connected by a series of... The interlocking snap-fit ​​grooves 16 and snap-fit ​​blocks 17 form a columnar structure, and a compensation gap is formed between the mesh pad bases 12 of the interlocking structure. This gap can effectively absorb and disperse the thermal stress caused by temperature changes. After the thermal stress is effectively compensated, the thermal stress compensator can maintain the stable operation of the pipeline system of the oil extraction equipment and avoid pipeline rupture, leakage and other failures caused by excessive thermal stress. The design of the sealing ring 11, the snap-fit ​​groove 14, the snap-fit ​​protrusion 15 and other components also ensures the sealing performance and structural strength of the equipment, enabling the equipment to operate stably for a long time in harsh working environments.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc., are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0029] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A thermal stress compensator for oil extraction equipment, characterized in that: include: A first sleeve (1) and a second sleeve (2) are provided. The first sleeve (1) is inserted into the second sleeve (2), and both ends of the first sleeve (1) and the second sleeve (2) are provided with connecting flanges (3). The surface of the connecting flange (3) is provided with a mounting seat (8), and the inside of the mounting seat (8) is provided with a pressure cap (6). The pressure cap (6) is fixedly connected to the mounting seat (8) by bolts. The inside of the pressure cap (6) is provided with a connecting pipe (7). The inside of the first sleeve (1) is provided with a first end cap (9), and the second sleeve (2) is provided with a connecting pipe (7). The inside of the cylinder (2) is provided with a second end cap (10). Between the first end cap (9) and the second end cap (10), there are several sets of mesh pads. The mesh pad base (12), the first end cap (9) and the second end cap (10) are both provided with an inner hole (18) and an inner sleeve (13) is installed in the inner hole (18). The mesh pad base (12) is composed of several sets of mesh pads. The two ends of the mesh pads are respectively provided with interlocking snap grooves (16) and snap blocks (17). The several sets of mesh pads form a columnar structure mesh pad base (12).

2. The thermal stress compensator for oil extraction equipment according to claim 1, characterized in that: The connecting flange (3) is provided with a connecting column (4) inside, and the two ends of the connecting column (4) are provided with fixing nuts (5).

3. A thermal stress compensator for oil extraction equipment according to claim 1, characterized in that: The mounting base (8) is provided with a sealing ring (11) inside, and the sealing ring (11) wraps around the connecting end surface of the pressure cap (6).

4. A thermal stress compensator for oil extraction equipment according to claim 1, characterized in that: The connecting pipe (7) is threadedly connected to the gland (6).

5. A thermal stress compensator for oil extraction equipment according to claim 1, characterized in that: The surfaces of the first end cap (9) and the second end cap (10) are provided with slots (14) and snap-fit ​​protrusions (15) that match the mesh pad.

6. A thermal stress compensator for oil extraction equipment according to claim 1, characterized in that: There is a certain connection gap between the two ends of the inner sleeve (13) and the connecting pipe (7).

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