Jarring device with detachable sealing plug

Abstract

The utility model discloses a jar for dismounting a sealing plug, which solves the problems of complex structure and poor adaptability of the existing jar, and adopts the technical scheme that the jar comprises an upper joint, a lower joint and a central rod, the two ends of the central rod are respectively connected with the upper joint and the lower joint, and a jar ring is movably sleeved on the central rod, and the upper joint or the lower joint is movably sleeved on the central rod. The device is extremely simple in structure, flexible, small and exquisite, and capable of effectively providing jarring force and quickly disassembling the sealing plug.

Description

Technical Field

[0001] This utility model relates to the field of perforation for oil and gas well cable transmission, specifically a shock device for disassembling sealing plugs. Background Technology

[0002] During oil and gas well operations, the sealing plug is installed inside the blowout preventer. Due to aging and deformation, the sealing plug may become stuck in the blowout preventer and be difficult to remove. The shock absorber can provide shock force to facilitate the removal of the sealing plug.

[0003] Publication number CN2908767Y discloses a downhole fishing auxiliary tool, which consists of a shock rod, a shock cylinder, and a damping piston. The upper half of the shock cylinder is a large chamber, and the lower half is a small chamber. The damping piston consists of an inlet / outlet fluid port, a steel ball, and a ball seat forming a one-way valve. During use, the shock cylinder is filled with hydraulic oil. When the shock rod moves down under the action of the test weight rod, it moves from the large chamber into the small chamber, and the hydraulic oil quickly flows from the small chamber into the large chamber through the one-way valve. When the shock rod is lifted, the one-way valve closes, and the hydraulic oil slowly flows through the gap between the damping piston and the small chamber. When the damping piston is subjected to a large upward force, it suddenly moves from the small chamber into the large chamber, generating a shock effect. This can be repeated multiple times to release stuck downhole testing tools. This type of shocker requires hydraulic drive, has a complex structure, is large in size, has poor flexibility, and is inconvenient to maintain.

[0004] Publication number CN221211517U discloses a piston removal tool for a hydraulic shock absorber. To address the problem of connecting pistons in deep-hole machining, the tool includes a body with connectors and a disassembly head connected to its two ends. The disassembly head has multiple key blocks with right-angled trapezoidal cross-sections on its front sidewall, and springs are installed between the bottom of the key blocks and the disassembly head. This tool cannot be used alone and requires a disassembly / assembly frame for disassembling the balance piston of a hydraulic shock absorber. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems and provide a shocker for removing sealing plugs that is extremely simple in structure, flexible and compact, can effectively provide shock force, and can quickly remove sealing plugs.

[0006] The present invention includes an upper connector and a lower connector, and a central rod with its two ends connected to the upper connector and the lower connector respectively. A shocking ring is movably fitted on the central rod.

[0007] Preferably, the two ends of the center rod are threadedly connected to the upper connector and the lower connector, respectively.

[0008] Preferably, the upper and lower connectors have internal threaded holes on their inner sides, and the two ends of the center rod are provided with external threads.

[0009] Preferably, the outer side of the lower connector is provided with an external threaded post that can be threadedly connected to the sealing plug.

[0010] Preferably, the cross-section of the central rod is circular or polygonal, and the cross-section of the inner hole of the shock ring is also circular or polygonal.

[0011] Preferably, the shock ring has raised annular impact platforms at both ends.

[0012] Preferably, the outer side of the upper connector is provided with a mounting post, and the mounting post has a mounting hole.

[0013] Beneficial effects:

[0014] This invention features a movable shock ring mounted on the central rod. Repeated movement of the shock ring generates a shock force by striking the inner end face of the upper connector, thus removing the sealing plug. The upper and lower connectors are threaded to both ends of the central rod, and the lower connector can also be threaded to the sealing plug. All components are detachable, allowing for the selection of a suitable central rod length and shock ring size to flexibly meet different needs. This invention is extremely simple in structure, highly flexible and adaptable, with controllable shock force and quick disassembly of the sealing plug. Currently, it has been successfully applied in 21 perforation teams in the Fuling Shale Gas Field, Jianghan Oilfield, and Northwest Oil and Gas Field. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Among them, 1. upper connector, 1.1. internal threaded hole, 1.2. mounting post, 1.3. mounting hole, 2. center rod, 2.1. external thread, 3. shock ring, 3.1. annular impact platform, 4. lower connector, 4.1. internal threaded hole, 4.2. external threaded post. Detailed Implementation

[0017] The present invention will be further explained below with reference to the accompanying drawings:

[0018] See Figure 1The shock absorber includes an upper connector 1, a lower connector 4, and a central rod 2. The central rod 2 has external threads 2.1 at both ends. The upper connector 1 and lower connector 4 have internal threaded holes 1.1 and 4.1 on their inner sides. The two ends of the central rod 2 are threadedly connected to the upper connector 1 and lower connector 4, respectively. The lower connector 4 has an external threaded post 4.2 on its outer side that can be threadedly connected to a sealing plug. A shock ring 3 is movably fitted onto the central rod 2. The shock ring 3 has protruding annular impact platforms 3.1 at both ends. The annular impact platforms 3.1 increase the contact area with the connector surface during impact, improving impact stability. The central rod 2 has a circular or polygonal cross-section, and the inner hole of the shock ring 3 also has a corresponding circular or polygonal cross-section. The polygonal cross-section allows for better guidance of the shock ring 3. The above structure allows for flexible disassembly of each component, and allows for the selection of components of corresponding sizes depending on the piston to be disassembled, such as replacing the center rod 2 of different lengths or the shock ring 3 of different weights; preferably, the outer side of the upper connector 1 is provided with a mounting post 1.2, and the mounting post 1.2 has a mounting hole 1.3, which can also be connected to a puller, etc., to facilitate quick and safe removal of the sealing plug and prevent damage to the blowout preventer.

[0019] During operation, the upper connector 1, the central rod 2 with the shock ring 3, and the lower connector 4 are connected by threads. The outer threaded post 4.2 of the lower connector 4 is connected to the sealing plug by threads. The shock ring 3 is manually moved repeatedly to strike the inner end face of the upper connector 1, generating shock force, which causes the central rod 2 to generate an upward shock force, which ultimately drives the outer threaded post 4.2 to pull the sealing plug upward, and finally remove the sealing plug.

Claims

1. A vibrator for removing sealing plugs, comprising an upper connector and a lower connector, characterized in that, It also includes a central rod that connects to an upper connector and a lower connector at both ends, with a shock ring movably fitted on the central rod, and an external threaded post on the outer side of the lower connector that can be threaded to a sealing plug.

2. The shock absorber for disassembling the sealing plug as described in claim 1, characterized in that, The two ends of the central rod are threadedly connected to the upper connector and the lower connector, respectively.

3. The vibrator for disassembling the sealing plug as described in claim 1, characterized in that, The upper and lower connectors have internal threaded holes on their inner sides, and the two ends of the center rod are provided with external threads.

4. The shock absorber for disassembling a sealing plug as described in any one of claims 1-3, characterized in that, The cross-section of the central rod is circular or polygonal, and the cross-section of the inner hole of the shock ring is also circular or polygonal.

5. The shock absorber for disassembling a sealing plug as described in any one of claims 1-3, characterized in that, The shock ring has raised annular impact platforms at both ends.

6. The shock absorber for disassembling a sealing plug as described in any one of claims 1-3, characterized in that, The upper connector is provided with a mounting post on its outer side, and the mounting post has a mounting hole.

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