A stuck plunger sleeve tool

Abstract

The utility model discloses a kind of anti-jamming plunger sleeve tools, belong to downhole tool technical field, including sleeve and plunger, wherein, sleeve middle part is equipped with the first annular boss extending along sleeve radial direction inward, the lower end outer wall of sleeve is equipped with the first recess inward radial direction;Plunger includes body and the second annular boss extending along body radial direction outward, the outer diameter of second annular boss is located between the lower end inner diameter of sleeve, the first annular boss inner diameter, the upper end of body is conical, the upper end of plunger is convenient to pass through the hollow part of first annular boss, and after the upper end of plunger passes through the hollow part of first annular boss, first annular boss and second annular boss abut, to drive sleeve together to move upwards.The utility model sets up anti-jamming recess at the bottom of sleeve, it can reduce the contact area between sleeve and tubing hanger, to reduce the friction between the two, so that sleeve is more easily separated from tubing hanger.

Description

Technical Field

[0001] This utility model relates to the field of downhole tool technology, especially plunger tools, specifically an anti-jamming plunger sleeve tool. Background Technology

[0002] Plunger lift, a gas well drainage and gas production technology, is widely used in major oilfields. Typically, a plunger sleeve tool consists of a sleeve and a plunger. The sleeve is located inside the tubing. During operation, after the plunger and sleeve are combined, the bottom of the plunger is pressurized with air. This causes the plunger and sleeve to move together, pushing the liquid above the plunger towards the wellhead. After the pressure is released from the bottom of the plunger, the plunger and sleeve descend under their own weight until the sleeve abuts against the tubing hanger and is locked. Then, the plunger and sleeve separate and continue descending. At this point, liquid enters the area above the plunger through the gap between the plunger and the tubing. Later, the bottom of the plunger is pressurized again, causing the plunger to push the liquid above it upwards and through the sleeve. Of course, some liquid above the plunger will flow through the gap between the plunger and the tubing to the area below the plunger. When the plunger re-enters the sleeve, it becomes integrated with the tubing and moves upwards, reducing the fluid flow area between the tubing and the plunger, thus pushing the liquid upwards. When using existing plunger sleeve tools, the bottom of the sleeve can easily get stuck in the tubing hanger when the sleeve moves downwards to meet it. This causes the hanger to become jammed or stuck, requiring extremely high gas pressure to move the sleeve later, and sometimes it cannot move at all, leading to air lift failure. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides an anti-jamming plunger sleeve tool, which features an anti-jamming groove at the bottom of the sleeve. This groove aims to reduce the contact area between the sleeve and the tubing hanger, thereby reducing the friction between them and making it easier for the sleeve to detach from the tubing hanger.

[0004] The specific solution of this utility model is as follows:

[0005] An anti-jamming plunger sleeve tool, comprising:

[0006] A sleeve, wherein a first annular boss extending radially inward is provided in the middle of the sleeve, and a first radially inward groove is provided on the outer wall of the lower end of the sleeve;

[0007] The plunger includes a body and a second annular boss extending radially outward along the body. The outer diameter of the second annular boss is located between the inner diameter of the lower end of the sleeve and the inner diameter of the first annular boss. The upper end of the body is conical, which facilitates the upper end of the plunger to pass through the hollow part of the first annular boss. After the upper end of the plunger passes through the hollow part of the first annular boss, the first annular boss and the second annular boss abut against each other, thereby driving the sleeve to move upward together.

[0008] In one specific embodiment of this utility model, the first groove is a mesh structure formed by multiple lines intersecting and connecting.

[0009] Furthermore, the top view of a single unit of the mesh structure is rhomboid.

[0010] In one specific embodiment of this utility model, there are multiple first grooves, which are arranged in an array along the circumferential direction of the body, and each first groove extends along the axial direction of the body.

[0011] As a specific embodiment of this utility model, the inner wall of the lower end of the sleeve is provided with a radially outward annular groove.

[0012] Compared with existing technologies, it has the following advantages:

[0013] This invention features an anti-jamming groove at the bottom of the sleeve, which reduces the contact area between the sleeve and the tubing hanger, thereby reducing the friction between them and making it easier for the sleeve to detach from the tubing hanger. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a specific embodiment of the anti-jamming plunger sleeve tool of this utility model;

[0015] Figure 2 for Figure 1 A partial front view of the middle sleeve;

[0016] Figure 3 This is a three-dimensional structural diagram of the sleeve in another embodiment;

[0017] In the figure, sleeve 100; plunger 200; first annular boss 110; first groove 120; annular groove 130; body 210; second annular boss 220; rubber ring 300. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0019] Example

[0020] Please refer to Figures 1-2This illustration shows the structure of a specific embodiment of the anti-jamming plunger sleeve tool of this utility model. The anti-jamming plunger sleeve tool of this utility model includes a sleeve 100 and a plunger 200. The sleeve 100 has a first annular boss 110 extending radially inward in the middle, and a first radially inward groove 120 on the lower outer wall of the sleeve 100. The plunger 200 includes a body 210 and a second annular boss 220 extending radially outward in the body, wherein the outer diameter of the second annular boss 220 is located at the sleeve 100. Between the lower inner diameter of the plunger 200 and the inner diameter of the first annular boss 110, a retrieval neck is provided at the upper end of the body 210 to facilitate retrieval. The upper end face of the retrieval neck is provided with rounded corners or chamfers to facilitate the upper end of the plunger 200 passing through the hollow part of the first annular boss 110. After the upper end of the plunger 200 passes through the hollow part of the first annular boss 110, the first annular boss 110 abuts against the second annular boss 220, thereby driving the sleeve 100 to move upward together, thereby pushing the fluid above the plunger 200 to flow towards the wellhead.

[0021] The present invention provides a first groove 120 on the bottom outer wall of the sleeve 100 to reduce the contact area between the sleeve 100 and the tubing hanger, thereby reducing the friction between the two, so that when the plunger 200 pushes the sleeve 100, the sleeve 100 can more easily detach from the tubing hanger.

[0022] To facilitate the smooth passage of the plunger 200 through the sleeve 100, the abutting parts of the first annular boss 110 and the second annular boss 220 are both chamfered, and the chamfers of the two are complementary, thereby ensuring that the two can fit tightly together and thus improving the sealing effect.

[0023] In some embodiments, such as Figure 2 As shown, there are multiple first grooves 120, which are interconnected to form a mesh structure. The top view of a single unit of this mesh structure is rhomboid. In other embodiments, such as... Figure 3 As shown, there are multiple first grooves 120, arranged in an array along the circumference of the body 210, with each groove extending along the axial direction of the body. In specific implementation, increasing the width of the first groove 120 can reduce the contact area between the sleeve 100 and the oil pipe hanger, thereby reducing the friction between them. At the same time, the first groove 120 can also serve as a storage space or flow channel for impurities between the sleeve 100 and the oil pipe, reducing the resistance during the movement of the sleeve 100.

[0024] In some embodiments, such as Figure 1 As shown, the inner wall of the lower end of the sleeve 100 is provided with a radially outward annular groove 130, which is conducive to a tighter fit between the plunger 200 and the sleeve 100. In addition, in some embodiments, a rubber ring 300 is provided in the inner wall of the lower end of the sleeve to increase the friction between the sleeve 100 and the plunger 200 and prevent the plunger 200 from falling off.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A type of anti-jamming plunger sleeve tool, characterized in that, include: A sleeve, wherein a first annular boss extending radially inward is provided in the middle part of the sleeve, and a first radially inward groove is provided on the lower outer wall of the sleeve; The plunger includes a body and a second annular boss extending radially outward along the body. The outer diameter of the second annular boss is located between the inner diameter of the lower end of the sleeve and the inner diameter of the first annular boss. The upper end of the body is conical, which facilitates the upper end of the plunger passing through the hollow portion of the first annular boss. After the upper end of the plunger passes through the hollow portion of the first annular boss, the first annular boss abuts against the second annular boss, thereby driving the sleeve to move upward together.

2. The anti-jamming plunger sleeve tool according to claim 1, characterized in that, The first groove is a mesh structure formed by multiple intersecting lines.

3. The anti-jamming plunger sleeve tool according to claim 2, characterized in that, The top view of a single unit of the mesh structure is rhomboid.

4. The anti-jamming plunger sleeve tool according to claim 1, characterized in that, There are multiple first grooves, which are arranged in an array along the circumference of the body, and each first groove extends along the axial direction of the body.

5. The anti-jamming plunger sleeve tool according to claim 1, characterized in that, The inner wall of the lower end of the sleeve is provided with a radially outward annular groove.

6. The anti-jamming plunger sleeve tool according to claim 5, characterized in that, The inner wall of the lower end of the sleeve is provided with a rubber ring to increase the friction between the sleeve and the plunger and prevent the plunger from falling out of position.

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