Packer rubber sleeve with supporting self-locking framework

Abstract

The utility model discloses a packer rubber sleeve with a supporting self-locking framework, and particularly relates to the field of well completion of petroleum and natural gas development. A packer rubber barrel with a supporting self-locking framework comprises a top barrel, a rubber barrel body, a bottom barrel body, a center pipe, a supporting rod, a hinged shaft, a connecting rod and a sliding ring. The novel metal framework is additionally arranged in the rubber sleeve, circumferential load applied to the rubber sleeve can be converted into radial load to further press the rubber sleeve and the well wall, compared with a traditional rubber sleeve seal, the packer has higher packing capacity and pressure bearing capacity, the structure can achieve the self-locking effect through meshing of the hook tooth grooves and the hook teeth, and the self-locking effect is good. The structure can be used for any permanent packer and has very wide popularization prospects.

Description

Technical Field

[0001] This utility model relates to a supporting device for oil well drilling, specifically a packer sleeve with a supporting self-locking frame. Background Technology

[0002] Packers are crucial tools in oil and gas field cementing and production processes. As oil and gas field development deepens, the requirements for the reliability, temperature resistance, pressure resistance, and sealing performance of downhole tools such as packers are constantly increasing. Especially when packers are operating in deep and ultra-deep well sections, they struggle to effectively isolate high-pressure oil and gas products. Furthermore, the complex downhole environment and the complex stress on the tubing string mean that after a period of operation, packers may experience risks such as sleeve damage leading to instability and movement, or premature unsealing. More seriously, this could cause tubing string deformation and damage.

[0003] Existing Chinese patent document CN202323021634.9 discloses a high-temperature and high-pressure packer rubber sleeve structure, which improves the technical problems of poor stability and short service life of packer rubber sleeves. The device includes a central rubber sleeve, with side rubber sleeves and a clamping part symmetrically arranged at its upper and lower ends. The central rubber sleeve and the two side rubber sleeves are made of high-temperature resistant fluororubber material. The side rubber sleeves are used to clamp and support the central rubber sleeve, and the clamping part tightly presses the corresponding side rubber sleeves against the corresponding ends of the central rubber sleeve. This utility model adopts a three-section rubber sleeve structure, that is, by using the two side rubber sleeves to jointly clamp and support the central rubber sleeve, it ensures the tightness between the central rubber sleeve and the inner wall of the wellbore, thereby ensuring a tight seal between the central rubber sleeve and the inner wall of the wellbore. This improves the stability of the packer rubber sleeve and extends its service life.

[0004] Existing Chinese patent document CN202110062086.0 discloses a sulfur-resistant, acid-resistant, high-temperature, and high-pressure packer cartridge and packer, including a central tube and a cartridge body. The cartridge body is sleeved outside the central tube and slidably connected to the central tube. Protective mechanisms are provided at the top and bottom of the cartridge body. A support mechanism is provided at the bottom of the central tube, and a sealing mechanism is provided at the top of the central tube. The protective mechanisms include a first movable ring and a second movable ring, both sleeved outside the central tube and slidably connected to the central tube. The first movable ring is fixedly connected to the cartridge body. This invention, by providing protective mechanisms at both the top and bottom of the cartridge body, and the sealing rings of the protective mechanisms sealing the upper and lower ends of the cartridge body, prevents corrosion from harsh working environments and effectively protects the cartridge body.

[0005] In practical use, the above solutions are difficult to implement and have low tool reliability, while the traditional rubber sleeve method provides only a small improvement in the overall sealing performance of the packer.

[0006] In view of this, there is a need for a new, simple, and reliable packer sleeve structure to address the problems existing in the prior art. Utility Model Content

[0007] The main purpose of this invention is to provide a packer sleeve with a self-locking support frame, which has the advantages of stable structure, high reliability and strong sealing performance, and solves the problem of easy failure of packer sleeves.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] This utility model provides a packer rubber tube with a supporting self-locking frame, including a top tube, a rubber tube, a bottom tube, a central tube, a support rod, a hinge shaft, a connecting rod, and a slip ring. The top tube, rubber tube, and bottom tube are fitted outside the central tube, with the rubber tube located between the top tube and the bottom tube. A slip ring is fitted outside each of the top tube and the bottom tube.

[0010] Optionally or preferably, the slip ring has a hinge hole, and the slip ring is hinged to the connecting rod through a hinge shaft.

[0011] Optionally or preferably, each strut is hinged to the two connecting rods via two hinge pins.

[0012] Optionally or preferably, the top cylinder has several hook grooves and the bottom cylinder has several hook teeth, so that the hook grooves can engage with the hook teeth after the rubber tube is compressed.

[0013] Optionally or preferably, the rubber tube has several inner grooves, and the inner grooves accommodate the support rods.

[0014] Compared with the prior art, the embodiments of this utility model have at least the following beneficial effects:

[0015] 1. This utility model adds a new type of metal skeleton inside the traditional rubber sleeve, which converts the circumferential load into a radial load to further compress the rubber sleeve and the well wall. Compared with the traditional rubber sleeve seal, the packer has stronger sealing and pressure-bearing capabilities.

[0016] 2. The structure of this utility model can be used for any permanent packer and has a very wide range of application prospects. The self-locking effect can be achieved through the interlocking of the hook groove and the hook tooth. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a magnified schematic diagram of the I-bit of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention after the glue tube is removed;

[0020] Figure 4 This is a schematic diagram of the structure of the present invention after the rubber tube and frame have been removed.

[0021] Figure 5 This is a cross-sectional view of the present invention.

[0022] In the diagram: 1. Top cylinder; 101. Hook tooth groove; 2. Glue tube; 201. Inner groove of glue tube; 3. Bottom cylinder; 301. Hook tooth; 4. Center tube; 5. Support rod; 6. Hinge shaft; 7. Connecting rod; 8. Slip ring; 801. Hinge hole. Detailed Implementation

[0023] To make the technical means, creative features, achieved objectives, and effects of this patent easily understood, the present invention will be further described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figures 1 to 5 As shown:

[0025] This utility model provides a packer rubber tube with a supporting self-locking frame, including a top tube 1, a rubber tube 2, a bottom tube 3, a central tube 4, a support rod 5, a hinge shaft 6, a connecting rod 7, and a slip ring 8. The top tube 1, rubber tube 2, and bottom tube 3 are fitted outside the central tube 4, with the rubber tube 2 located between the top tube 1 and the bottom tube 3. A slip ring 8 is fitted outside the top tube 1 and the bottom tube 3 respectively.

[0026] As an optional implementation, the slip ring 8 has a hinge hole 801, and the slip ring 8 is hinged to the connecting rod 7 through the hinge shaft 6.

[0027] As an optional implementation, each of the struts 5 is hinged to the two connecting rods 7 via two hinge pins 6.

[0028] As an optional implementation, the top cylinder 1 has a plurality of hook grooves 101 and the bottom cylinder 3 has a plurality of hook teeth 301. After the rubber tube 2 is compressed, the hook grooves 101 can engage with the hook teeth 301.

[0029] As an optional implementation, the rubber tube 2 has a plurality of inner grooves 201, and the inner grooves 201 accommodate the support rods 5.

[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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A packer cartridge with a self-locking support frame, characterized in that, It includes a top cylinder (1), a rubber cylinder (2), a bottom cylinder (3), a central tube (4), a support rod (5), a hinge shaft (6), a connecting rod (7), and a slip ring (8). The top cylinder (1), the rubber cylinder (2), and the bottom cylinder (3) are fitted outside the central tube (4). The rubber cylinder (2) is located between the top cylinder (1) and the bottom cylinder (3). A slip ring (8) is fitted outside the top cylinder (1) and the bottom cylinder (3) respectively.

2. The packer cartridge with a self-locking support frame according to claim 1, characterized in that, The slip ring (8) has a hinge hole (801) and the slip ring (8) is hinged to the connecting rod (7) through the hinge shaft (6).

3. A packer cartridge with a self-locking support frame according to claim 1, characterized in that, Each of the support rods (5) is hinged to the two connecting rods (7) through two hinge pins (6).

4. A packer cartridge with a self-locking support frame according to claim 1, characterized in that, The top cylinder (1) has several hook grooves (101), and the bottom cylinder (3) has several hook teeth (301).

5. A packer cartridge with a self-locking support frame according to claim 1, characterized in that, The rubber tube (2) has several inner grooves (201), and the inner grooves (201) accommodate the support rods (5).

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