Expansion type packer

Abstract

The utility model relates to an expansion type packer. The middle of the damping cylinder is sleeved with a protective rubber cylinder, locking devices used for being matched with the damping cylinder to lock the protective rubber cylinder are installed at the two ends of the protective rubber cylinder, step grooves are formed in the two sides of the damping cylinder, first limiting grooves are formed in the outer walls of the step grooves, and positioning grooves are formed in one ends of groove cavities of the first limiting grooves. An arc-shaped limiting plate used for being matched with the first limiting groove to limit the fixing ring is installed on one side of the fixing ring, a locking assembly used for being matched with the positioning groove to lock the fixing ring is installed in the middle of the arc-shaped limiting plate, and an unlocking assembly used for unlocking the fixing ring is installed in the middle of the arc-shaped limiting plate. When the protective rubber sleeve is seriously abraded and needs to be replaced, the pressing disc is pressed to be close to the fixing ring, then the protruding block is driven to slide from one end of the inclined groove to the other end of the inclined groove, the locking block is driven to be away from a groove cavity of the positioning groove under guiding of the inclined groove, and then the locking device and the protective rubber sleeve can be rapidly disassembled.

Description

Technical Field

[0001] This utility model relates to the field of packer technology, and in particular to an expansion packer. Background Technology

[0002] A packer is a downhole tool with elastic sealing elements that seals the annular space between tubing of various sizes and the wellbore, as well as between tubing strings, and isolates the producing layer to control production (injection) fluid and protect the casing.

[0003] For example, an expansion packer disclosed in Chinese patent application CN202320846069.0 specifically describes a protective rubber sleeve device comprising a protective rubber sleeve body, with side rings fixedly connected to both sides of the protective rubber sleeve body. The protective rubber sleeve device is fitted onto a shock-absorbing cylinder device. The threads of the inner walls of multiple limiting devices are connected to the bolt grooves at both ends of the outer wall surface of the shock-absorbing cylinder body. The multiple limiting bodies restrict the position of both ends of the protective rubber sleeve device, facilitating the stable positioning of the protective rubber sleeve device among the multiple limiting devices. However, this design presents the following technical problems:

[0004] Although the protective rubber sleeve protects the shock-absorbing cylinder device, it is prone to friction with the inner wall of the downhole tubing, causing friction damage to the outer wall of the protective rubber sleeve device. Therefore, the protective rubber sleeve device needs to be replaced. Moreover, when replacing the protective rubber sleeve device, the limiting device needs to be rotated multiple times before the protective rubber sleeve device can be disassembled, which is a rather cumbersome operation. Utility Model Content

[0005] To address the cumbersome disassembly of the protective rubber sleeve device mentioned in the background section, this utility model provides the following technical solution:

[0006] An expansion packer includes a packer fitted with a shock absorber.

[0007] The shock absorber is fitted with a protective rubber sleeve in the middle, and locking devices are installed at both ends of the protective rubber sleeve to lock the protective rubber sleeve in conjunction with the shock absorber.

[0008] The shock absorber has stepped grooves on both sides, and a limiting groove is formed on the outer wall of the stepped groove. A positioning groove is formed at one end of the cavity of the limiting groove.

[0009] The locking device includes a fixing ring, an arc-shaped limiting plate installed on one side of the fixing ring for limiting a pair of fixing rings in conjunction with a limiting groove, a locking component installed in the middle of the arc-shaped limiting plate for locking the fixing rings in conjunction with a positioning groove, and an unlocking component installed in the middle of the arc-shaped limiting plate for unlocking the fixing rings.

[0010] Furthermore, the protective rubber tube is fitted with side rings at both ends, and a retaining ring is fitted on one side of the side rings.

[0011] Furthermore, a plug ring is installed on one side of the fixing ring, a second annular sealing gasket is installed on the inner side of the plug ring, a first annular sealing gasket is installed on the outer side of the plug ring, and an installation groove for limiting the arc-shaped limiting plate is provided on one side of the fixing ring.

[0012] Furthermore, bolts for limiting the arc-shaped limiting plate are installed at both ends of the arc-shaped limiting plate, and a positioning slider is installed on the inner wall of the arc-shaped limiting plate that slides into the groove of the limiting groove.

[0013] Furthermore, the locking assembly includes a locking block for locking the fixing ring in conjunction with the positioning groove. A connecting rod is installed at one end of the locking block. A second limiting groove is formed in the middle of the connecting rod. Inclined grooves are formed on both sides of the groove cavity of the second limiting groove. A limiting plate is installed at one end of the connecting rod. A second bolt for limiting the connecting rod is installed in the middle of the locking block.

[0014] Furthermore, the unlocking component includes a guide rod, with protrusions installed on both sides of one end of the guide rod and a pressure plate installed on the other end of the guide rod.

[0015] Furthermore, the arc-shaped limiting plate has a limiting groove three and a limiting groove four in the middle. A spring for pushing the limiting plate is installed in the cavity of the limiting groove three, and a sealing cover for limiting the spring is installed in the cavity of the limiting groove four.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. When the protective rubber sleeve is severely worn and needs to be replaced, press the pressure plate to move it closer to the fixing ring, which in turn drives the protrusion to slide from one end of the inclined groove to the other end. Under the guidance of the inclined groove, the locking block is moved away from the cavity of the positioning groove, so that the locking device and the protective rubber sleeve can be quickly disassembled.

[0018] 2. When installing the protective rubber sleeve, the positioning slider slides from the cavity of the limiting groove one towards the protective rubber sleeve. After the positioning slider slides to the other end of the cavity of the limiting groove one, the locking block is engaged in the cavity of the positioning groove under the action of the spring, thereby completing the limiting of the protective rubber sleeve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the external structure of the shock absorber cylinder of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the protective rubber tube of this utility model;

[0022] Figure 4 This utility model Figure 1 Enlarged view of point A;

[0023] Figure 5 This is a schematic diagram of the locking device of this utility model;

[0024] Figure 6 This is a schematic diagram of the locking component of this utility model;

[0025] Figure 7 This is a schematic diagram of the unlocking component of this utility model;

[0026] Figure 8 This utility model Figure 5 Enlarged view of point B.

[0027] The following is a list of component names represented by the various reference numerals in the attached figures:

[0028] 10-Package;

[0029] 100-Shock absorber, 110-Step groove, 111-Limiting groove one, 112-Positioning groove;

[0030] 200 - Protective rubber sleeve, 210 - Side ring, 211 - Retaining ring;

[0031] 300 - Locking device;

[0032] 310-Fixing ring, 311-Insertion ring, 312-First annular sealing gasket, 313-Second annular sealing gasket, 314-Mounting groove;

[0033] 320 - Arc-shaped limiting plate, 321 - Bolt 1, 322 - Positioning slider, 323 - Limiting groove 3, 324 - Limiting groove 4, 325 - Spring, 326 - Sealing cover;

[0034] 330-Locking assembly, 331-Locking block, 332-Connecting rod, 333-Limiting groove two, 334-Inclined groove, 335-Limiting plate, 336-Bolt two;

[0035] 340 - Unlocking component, 341 - Guide rod, 342 - Protrusion, 343 - Pressure plate. Detailed Implementation

[0036] The preferred embodiments of this utility model are described in detail below, and a clear and complete explanation is given in conjunction with the accompanying drawings.

[0037] Please see Figures 1-8This utility model provides an expansion packer, including a packer 10 with a shock absorber 100 installed.

[0038] The shock absorber 100 is existing technology, and the internal structure of the shock absorber 100 will not be described in this utility model. Stepped grooves 110 are formed on both sides of the shock absorber 100. Multiple limiting grooves 111 are formed on the outer wall of the stepped grooves 110. A positioning groove 112 is formed at one end of the cavity of each limiting groove 111. A protective rubber sleeve 200 is fitted in the middle of the shock absorber 100. Side rings 210 are fixedly installed at both ends of the protective rubber sleeve 200, and a retaining ring 211 is fixedly installed on one side of each side ring 210.

[0039] Locking devices 300 are installed at both ends of the protective rubber sleeve 200 to lock the protective rubber sleeve 200 in conjunction with the shock absorber 100. The locking device 300 includes a fixing ring 310, a retaining ring 311 fixedly installed on one side of the fixing ring 310, and a second annular sealing gasket 313 installed on the inner side of the retaining ring 311, which abuts against the side wall of the stepped groove 110 and the side wall of the protective rubber sleeve 200. A first annular sealing gasket 312 is installed on the outer side of the retaining ring 311, which abuts against the inner wall of the retaining ring 211. An installation groove 314 is provided on the other side of the fixing ring 310 to limit the arc-shaped limiting plate 320.

[0040] An arc-shaped limiting plate 320 is installed on one side of the fixing ring 310 to limit the fixing ring 310 in conjunction with the limiting groove 111. Bolts 321 are installed at both ends of the arc-shaped limiting plate 320 to limit the arc-shaped limiting plate 320. The arc-shaped limiting plate 320 is fixed in the cavity of the mounting groove 314 by the bolts 321. Multiple sliding blocks 322 for sliding within the cavity of the limiting groove 111 are fixedly installed on the inner wall of the arc-shaped limiting plate 320. Limiting grooves 323 and 324 are opened in the middle of the arc-shaped limiting plate 320. A spring 325 for pushing the limiting plate 335 is installed in the cavity of the limiting groove 323, so that the locking block 331 is always inserted into the cavity of the positioning groove 112. A sealing cover 326 for limiting the spring 325 is installed in the cavity of the limiting groove 324.

[0041] A locking assembly 330 is installed in the middle of the arc-shaped limiting plate 320 to lock the fixing ring 310 in conjunction with the positioning groove 112. The locking assembly 330 includes a locking block 331 for locking the fixing ring 310 in conjunction with the positioning groove 112. A connecting rod 332 is installed at one end of the locking block 331. A bolt 336 for limiting the connecting rod 332 is installed in the middle of the locking block 331. A threaded hole is opened at the end of the connecting rod 332 facing the locking block 331 so as to fix the locking block 331 to one side of the connecting rod 332 in conjunction with the bolt 336.

[0042] A limiting groove 333 is provided in the middle of the connecting rod 332. Inclined grooves 334 are provided on both sides of the groove cavity of the limiting groove 333. A limiting plate 335 is fixedly installed at one end of the connecting rod 332. One side of the inclined groove 334 faces the limiting plate 335, and the other side of the inclined groove 334 faces the locking block 331.

[0043] An unlocking component 340 for unlocking the fixing ring 310 is installed in the middle of the arc-shaped limiting plate 320. The unlocking component 340 includes a guide rod 341. One end of the guide rod 341 has protrusions 342 fixedly installed on both sides, and the protrusions 342 slide in the groove of the inclined groove 334. The other end of the guide rod 341 has a pressure plate 343 fixedly installed.

[0044] When the protective rubber sleeve 200 is severely worn and needs replacement, pressing the pressure plate 343 causes it to move closer to the fixing ring 310. This, in turn, causes the protrusion 342 to slide from one end of the inclined groove 334 to the other end. Guided by the inclined groove 334, the locking block 331 moves away from the cavity of the positioning groove 112, allowing for quick disassembly of the locking device 300 and the protective rubber sleeve 200. During installation, the positioning slider 322 slides from the cavity of the limiting groove 111 towards the protective rubber sleeve 200. After sliding to the other end of the cavity of the limiting groove 111, the locking block 331, under the action of the spring 325, engages with the cavity of the positioning groove 112, thus completing the limiting of the protective rubber sleeve 200.

[0045] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this utility model. Furthermore, any non-creative modifications made to this utility model by those skilled in the art without inventive effort are still within the protection scope of this utility model.

Claims

1. An expansion packer, comprising a packer (10) with a shock absorber (100) installed, characterized in that: The shock absorber (100) is fitted with a protective rubber sleeve (200) in the middle, and the two ends of the protective rubber sleeve (200) are equipped with locking devices (300) for locking the protective rubber sleeve (200) in conjunction with the shock absorber (100); The shock absorber (100) has stepped grooves (110) on both sides, and a limiting groove (111) is provided on the outer wall of the stepped groove (110). A positioning groove (112) is provided at one end of the groove cavity of the limiting groove (111). The locking device (300) includes a fixing ring (310), an arc-shaped limiting plate (320) for limiting the fixing ring (310) in conjunction with a limiting groove (111) is installed on one side of the fixing ring (310), a locking component (330) for locking the fixing ring (310) in conjunction with a positioning groove (112) is installed in the middle of the arc-shaped limiting plate (320), and an unlocking component (340) for unlocking the fixing ring (310) is installed in the middle of the arc-shaped limiting plate (320).

2. An expansion packer according to claim 1, characterized in that: The protective rubber tube (200) is equipped with side rings (210) at both ends, and a retaining ring (211) is installed on one side of the side rings (210).

3. An expansion packer according to claim 1, characterized in that: A plug ring (311) is installed on one side of the fixing ring (310), a second annular sealing gasket (313) is installed on the inner side of the plug ring (311), a first annular sealing gasket (312) is installed on the outer side of the plug ring (311), and an installation groove (314) for limiting the arc-shaped limiting plate (320) is provided on one side of the fixing ring (310).

4. An expansion packer according to claim 1, characterized in that: The two ends of the arc-shaped limiting plate (320) are equipped with bolts (321) for limiting the arc-shaped limiting plate (320), and the inner wall of the arc-shaped limiting plate (320) is equipped with a sliding block (322) that slides in the groove of the limiting groove (111).

5. An expansion packer according to claim 1, characterized in that: The locking assembly (330) includes a locking block (331) for locking the fixing ring (310) in conjunction with the positioning groove (112). A connecting rod (332) is installed at one end of the locking block (331). A second limiting groove (333) is opened in the middle of the connecting rod (332). Inclined grooves (334) are opened on both sides of the groove cavity of the second limiting groove (333). A limiting plate (335) is installed at one end of the connecting rod (332). A second bolt (336) for limiting the connecting rod (332) is installed in the middle of the locking block (331).

6. An expansion packer according to claim 1, characterized in that: The unlocking assembly (340) includes a guide rod (341), with protrusions (342) installed on both sides of one end of the guide rod (341) and a pressure plate (343) installed on the other end of the guide rod (341).

7. An expansion packer according to claim 5, characterized in that: The arc-shaped limiting plate (320) has a limiting groove three (323) and a limiting groove four (324) in the middle. A spring (325) for pushing the limiting plate (335) is installed in the groove cavity of the limiting groove three (323), and a sealing cover (326) for limiting the spring (325) is installed in the groove cavity of the limiting groove four (324).

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