A high-temperature-resistant packer for oil exploitation

Abstract

The utility model belongs to the field of oil exploitation, concretely is a kind of oil exploitation high-temperature packer, including packer body;The surface of the packer body is slidably connected with first protective shell, the side of the first protective shell is fixedly connected with first connecting ring;Through first protective shell and second protective shell, the surface of packer body and rubber tube local part can be protected, downhole impurities can be isolated, abrasion is reduced, aerogel composite material protective cover has low thermal conductivity, direct heat exchange of high-temperature medium and packer body can be reduced, packer body surface temperature is reduced, the high-temperature resistance of packer body is increased, elastic telescopic link pushes second protective shell to move, so that it is protected to the rubber tube after contraction on the outside of rubber tube, when rubber tube expands to outside, second protective shell can be moved from middle to both sides, so that second protective shell does not hinder the expansion and contraction of rubber tube.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction, specifically a high-temperature resistant packer for oil extraction. Background Technology

[0002] Oil extraction refers to the act of digging and extracting oil from places where oil reserves exist. In the process of oil extraction, oil and gas flow from the reservoir to the bottom of the well and then rise from the bottom of the well to the wellhead. Packers are widely used in oil production engineering. A packer is a downhole tool that has elastic sealing elements and uses them to seal the annular space between various sizes of tubing and the wellbore, as well as between tubing strings, and to isolate the producing layer in order to control production (injection) fluid and protect the casing.

[0003] Traditional packer bodies have inherent drawbacks: Most existing packer bodies typically use hydraulic actuation to expand the rubber sleeve on the packer body, thereby sealing the wellbore. However, existing external packer bodies suffer from the following problems during use: The packer surface is usually not fitted with a protective cover, and the packer is exposed to high-temperature environments during downhole operations. Direct exposure to high temperatures accelerates the thermal-oxidative aging of rubber and other materials, reducing their high-temperature resistance and service life.

[0004] Therefore, a high-temperature resistant packer is proposed for oil extraction to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background art, this utility model proposes a high-temperature resistant packer for oil extraction.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A high-temperature resistant packer for oil extraction, comprising a packer body; a first protective shell is slidably connected to the surface of the packer body; a first connecting ring is fixedly connected to the side of the first protective shell; an elastic telescopic rod is fixedly connected to the side of the first connecting ring; a second connecting ring is fixedly connected to one end of the elastic telescopic rod; the second connecting ring is slidably connected to the packer body; a second protective shell is fixedly connected to the side of the second connecting ring; an L-shaped groove is formed on the surface of the packer body; an L-shaped slider is fixedly connected to the inner side of the first protective shell; the L-shaped groove and the L-shaped slider are slidably connected. The packer body has a rubber sleeve on its surface. Both the first and second protective shells are aerogel composite material protective covers. This step uses the first and second protective shells to protect the surface of the packer body and the rubber sleeve locally, isolate downhole impurities, and reduce wear. The aerogel composite material protective cover has low thermal conductivity, which can reduce direct heat exchange between the high-temperature medium and the packer body, lower the surface temperature of the packer body, and increase the high-temperature resistance of the packer body. The elastic telescopic rod pushes the second protective shell to move, so that it protects the contracted rubber sleeve on the outside of the rubber sleeve. When the rubber sleeve expands outward, it can push the second protective shell from the middle to both sides, so that the second protective shell does not hinder the expansion and contraction of the rubber sleeve.

[0007] Preferably, the surface of the first protective shell is provided with a mounting hole, and a connecting bolt is threaded into the mounting hole. The connecting bolt is threadedly connected to the packer body. This step, by connecting the connecting bolt to the packer body, reinforces the first protective shell after installation, which can increase the stability when the first protective shell is connected to the packer body.

[0008] Preferably, the surface of the first protective shell is threaded with a wear-resistant sleeve, and both the L-shaped groove and the surface of the wear-resistant sleeve are provided with flow guide grooves. This step protects the surface of the first protective shell by using the wear-resistant sleeve to reduce wear on the surface of the first protective shell. By setting the flow guide grooves, the fluid can be guided to form a stable flow field, reducing the impact of turbulence on the packer body, and at the same time assisting in heat dissipation.

[0009] Preferably, the inner side of the second protective shell is rotatably connected with a number of rollers, and the surface of the rubber tube is fixedly connected with a limiting pad, and the side of the limiting pad is provided with a bevel. This step, by setting the rollers and the limiting pad, makes it easier for the rubber tube to push the second protective shell to move to both sides when it expands, and makes the movement of the second protective shell to both sides smoother.

[0010] Preferably, the surface of the second protective shell is provided with heat dissipation grooves, and the interior of the heat dissipation grooves is provided with heat dissipation holes; this step, by setting heat dissipation grooves and heat dissipation holes, increases the area through which fluid passes through the second protective shell, making it easier for the inside of the second protective shell to ventilate, and can increase the heat dissipation efficiency of the rubber sleeve.

[0011] Preferably, both the first and second protective shells are coated with a waterproof and oil-proof coating; this waterproof and oil-proof coating can prevent moisture absorption from causing a decrease in heat insulation performance.

[0012] The advantages of this utility model are:

[0013] 1. The high-temperature resistant packer for oil extraction described in this utility model, through the first protective shell and the second protective shell, can protect the surface of the packer body and the rubber sleeve locally, isolate downhole impurities, reduce wear, and the aerogel composite material protective cover has low thermal conductivity, which can reduce the direct heat exchange between the high-temperature medium and the packer body, lower the surface temperature of the packer body, and increase the high-temperature resistance of the packer body. The elastic telescopic rod pushes the second protective shell to move, so that it protects the rubber sleeve after shrinkage on the outside of the rubber sleeve. When the rubber sleeve expands outward, it can push the second protective shell from the middle to both sides, so that the second protective shell does not hinder the expansion and contraction of the rubber sleeve.

[0014] 2. The oil extraction high-temperature resistant packer of this utility model, by connecting the first protective shell to the packer body with connecting bolts, can increase the stability of the connection between the first protective shell and the packer body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional sectional view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional surface structure in this utility model;

[0019] Figure 4 This is a schematic diagram of the protective structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the inner structure of the first protective shell in this utility model.

[0021] Legend: 1. Packer; 12. First protective shell; 13. First connecting ring; 14. Elastic telescopic rod; 15. Second connecting ring; 16. Second protective shell; 17. L-shaped slide; 18. L-shaped slider; 19. Glue tube; 21. Mounting hole; 22. Connecting bolt; 31. Wear-resistant sleeve; 32. Guide channel; 41. Roller; 42. Limiting pad; 51. Heat dissipation groove; 52. Heat dissipation hole. Detailed Implementation

[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 protection scope of the present utility model.

[0023] like Figures 1 to 5As shown, a high-temperature resistant packer for oil extraction includes a packer body 1; a first protective shell 12 is slidably connected to the surface of the packer body 1; a first connecting ring 13 is fixedly connected to the side of the first protective shell 12; an elastic telescopic rod 14 is fixedly connected to the side of the first connecting ring 13; a second connecting ring 15 is fixedly connected to one end of the elastic telescopic rod 14; the second connecting ring 15 is slidably connected to the packer body 1; a second protective shell 16 is fixedly connected to the side of the second connecting ring 15; an L-shaped groove 17 is formed on the surface of the packer body 1; an L-shaped slider 18 is fixedly connected to the inner side of the first protective shell 12; the L-shaped groove 17 and the L-shaped slider 18 are slidably connected. The packer body 1 has a rubber sleeve 19 on its surface. Both the first protective shell 12 and the second protective shell 16 are aerogel composite material protective covers. During operation, when the rubber sleeve 19 expands, it pushes the second protective shells 16 on both sides to move to the sides. The second protective shells 16 then move the second connecting ring 15, which in turn pushes the elastic telescopic rod 14 to compress it. When the rubber sleeve 19 returns to its original position, the elastic telescopic rod 14 pushes the second connecting ring 15 to move towards the center, which in turn resets the second protective shell 16. The second protective shells 16 on both sides protect the surface of the rubber sleeve 19, while the first protective shell 12 protects both ends of the packer body 1. When the first protective shell 12 needs to be disassembled for protection, rotate the first protective shell 12. This causes the inner L-shaped slider 18 to slide inside the L-shaped groove 17. Then, move the first protective shell 12, causing the L-shaped slider 18 to move out of the L-shaped groove 17, separating the first protective shell 12 from the packer body 1. Simultaneously, the first protective shell 12 moves the first connecting ring 13, which in turn moves the elastic telescopic rod 14. The elastic telescopic rod 14 then moves the second connecting ring 15, which in turn moves the second protective shell 16. This allows for the disassembly and replacement of the first protective shell 12 and the second protective shell 16. The steps involve using the first protective shell 12 and the second protective shell 16 to protect the surface of the packer body 1 and the rubber sleeve 19, which can isolate downhole impurities and reduce wear. The aerogel composite material protective cover has low thermal conductivity, which can reduce the direct heat exchange between the high-temperature medium and the main body of the packer body 1, lower the surface temperature of the packer body 1, and increase the high temperature resistance of the packer body 1. The elastic telescopic rod 14 pushes the second protective shell 16 to move, so that it protects the rubber sleeve 19 after it has shrunk on the outside. When the rubber sleeve 19 expands outward, it can push the second protective shell 16 from the middle to both sides, so that the second protective shell 16 does not hinder the expansion and contraction of the rubber sleeve 19.

[0024] like Figures 2 to 5As shown, the surface of the first protective shell 12 is provided with a mounting hole 21, and a connecting bolt 22 is threaded inside the mounting hole 21. The connecting bolt 22 is threadedly connected to the packer body 1. When the first protective shell 12 needs to be disassembled or assembled during operation, the connecting bolt 22 is first separated from the packer body 1, and then the first protective shell 12 can be rotated. This step, through the connection of the connecting bolt 22 to the packer body 1, reinforces the first protective shell 12 after installation, which can increase the stability of the connection between the first protective shell 12 and the packer body 1.

[0025] like Figures 2 to 5 As shown, a wear-resistant sleeve 31 is threadedly connected to the surface of the first protective shell 12. Both the L-shaped groove 17 and the surface of the wear-resistant sleeve 31 are provided with flow guide grooves 32. During operation, the wear-resistant sleeve 31 can protect the surface of the first protective shell 12. By rotating the wear-resistant sleeve 31 to separate it from the first protective shell 12, the wear-resistant sleeve 31 can be replaced. This step protects the surface of the first protective shell 12 by the wear-resistant sleeve 31, reducing the wear on the surface of the first protective shell 12. By setting the flow guide grooves 32, the fluid can be guided to form a stable flow field, reducing the impact of turbulence on the packer body, and at the same time assisting in heat dissipation.

[0026] like Figures 1 to 4 As shown, a number of rollers 41 are rotatably connected to the inner side of the second protective shell 16. A limiting pad 42 is fixedly connected to the surface of the rubber tube 19, and the side of the limiting pad 42 is provided with a bevel. During operation, when the rubber tube 19 expands, it drives the limiting pad 42 to move, and pushes the second protective shell 16 to move to both sides through the limiting pad 42. At the same time, it pushes the rollers 41 to rotate. This step, by setting the rollers 41 and the limiting pad 42, makes it easier for the rubber tube 19 to push the second protective shell 16 to move to both sides when it expands, and makes the movement of the second protective shell 16 to both sides smoother.

[0027] like Figure 4 and Figure 5 As shown, a heat dissipation groove 51 is provided on the surface of the second protective shell 16, and a heat dissipation hole 52 is provided inside the heat dissipation groove 51. This step increases the area through which the fluid passes through the second protective shell 16 by setting the heat dissipation groove 51 and the heat dissipation hole 52, making it easier for the inside of the second protective shell 16 to be ventilated, which can increase the heat dissipation efficiency of the rubber sleeve 19.

[0028] like Figures 1 to 5 As shown, the surfaces of both the first protective shell 12 and the second protective shell 16 are coated with a waterproof and oil-proof coating; this waterproof and oil-proof coating can prevent moisture absorption from causing a decrease in heat insulation performance.

[0029] Working principle: When the rubber cylinder 19 expands, it moves the limiting pad 42, which in turn pushes the second protective shell 16 to both sides. Simultaneously, it drives the roller 41 to rotate, further pushing the second protective shells 16 to move to both sides. The second protective shells 16 then move the second connecting ring 15, which in turn pushes the elastic telescopic rod 14 to compress it. When the rubber cylinder 19 returns to its original position, the elastic telescopic rod 14 pushes the second connecting ring 15 towards the center, causing the second protective shells 16 to reset. The second protective shells 16 on both sides protect the surface of the rubber cylinder 19, while the first protective shell 12 protects both ends of the packer body 1. When the first protective shell 12 needs to be disassembled, the wear-resistant sleeve 31 is rotated to make it contact the second protective shell 16. The first protective shell 12 can be separated to replace the wear-resistant sleeve 31. Then, the connecting bolt 22 can be separated from the packer body 1. The first protective shell 12 can be rotated. Rotating the first protective shell 12 causes the inner L-shaped slider 18 to slide inside the L-shaped groove 17. Then, the first protective shell 12 is moved so that it moves the L-shaped slider 18 out of the L-shaped groove 17, separating the first protective shell 12 from the packer body 1. At the same time, the first protective shell 12 drives the first connecting ring 13 to move. The first connecting ring 13 drives the elastic telescopic rod 14 to move. The elastic telescopic rod 14 drives the second connecting ring 15 to move. The second connecting ring 15 drives the second protective shell 16 to move, allowing the first protective shell 12 and the second protective shell 16 to be disassembled and replaced.

[0030] 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 claimed utility model.

Claims

1. A high-temperature resistant packer for oil extraction, comprising a packer body (1); characterized in that: The packer body (1) is slidably connected to a first protective shell (12). A first connecting ring (13) is fixedly connected to the side of the first protective shell (12). An elastic telescopic rod (14) is fixedly connected to the side of the first connecting ring (13). A second connecting ring (15) is fixedly connected to one end of the elastic telescopic rod (14). The second connecting ring (15) is slidably connected to the packer body (1). A second protective shell (16) is fixedly connected to the side of the second connecting ring (15). An L-shaped groove (17) is provided on the surface of the packer body (1). An L-shaped slider (18) is fixedly connected to the inner side of the first protective shell (12). The L-shaped groove (17) and the L-shaped slider (18) are slidably connected. A rubber tube (19) is provided on the surface of the packer body (1). Both the first protective shell (12) and the second protective shell (16) are aerogel composite material protective covers.

2. The high-temperature resistant packer for oil extraction according to claim 1, characterized in that: The first protective shell (12) has a mounting hole (21) on its surface. A connecting bolt (22) is threaded into the mounting hole (21) and is threaded into the packer body (1).

3. A high-temperature resistant packer for oil extraction according to claim 2, characterized in that: The surface of the first protective shell (12) is threaded with a wear-resistant sleeve (31), and the surfaces of the L-shaped groove (17) and the wear-resistant sleeve (31) are both provided with guide grooves (32).

4. A high-temperature resistant packer for oil extraction according to claim 3, characterized in that: The inner side of the second protective shell (16) is rotatably connected with a roller (41), and there are several rollers (41). The surface of the rubber tube (19) is fixedly connected with a limiting pad (42), and the side of the limiting pad (42) is provided with a slanted cut.

5. A high-temperature resistant packer for oil extraction according to claim 4, characterized in that: The surface of the second protective shell (16) is provided with a heat dissipation groove (51), and the interior of the heat dissipation groove (51) is provided with a heat dissipation hole (52).

6. A high-temperature resistant packer for oil extraction according to claim 5, characterized in that: Both the first protective shell (12) and the second protective shell (16) are coated with a waterproof and oil-proof coating.

Images