Controllable plunger for drainage gas recovery of gas well

Abstract

This utility model discloses a controllable plunger for gas well drainage and gas production, belonging to the field of drainage and gas production plunger technology. It includes: a plunger body with multiple annular protrusions on its surface, and a retrieval head on the top of the plunger body; two sets of unblocking and scraping mechanisms connected to the plunger body, with the multiple annular protrusions located between the two sets of unblocking and scraping mechanisms; each unblocking and scraping mechanism includes multiple levers and a center-of-gravity piston; a slide rail is provided at the bottom of the plunger body; the levers are connected to the plunger body via a first pin; and the multiple levers are arranged in a circular array along the axis of the plunger body. This utility model removes wax deposits by setting two sets of unblocking and scraping mechanisms on the plunger body. When the plunger body moves, the center-of-gravity piston, sliding within the slide rail, slides within the slide rail. The sliding of the center-of-gravity piston drives the levers to rotate, causing the scraper to remove the wax deposits, preventing the wax deposits from affecting the normal operation of the plunger body and improving lifting efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of drainage and gas production plunger technology, and in particular relates to a controllable plunger for drainage and gas production in gas wells. Background Technology

[0002] The drainage and gas production plunger is a key piece of equipment used in oil and gas field development to solve the problem of liquid accumulation in gas wells, especially in low-pressure, low-production, and high-liquid-content gas wells. Its core function is to use the reciprocating motion of the plunger in the wellbore to lift the liquid accumulated at the bottom of the well to the surface using the formation's own energy, while preventing gas channeling and restoring the gas well's production capacity.

[0003] Currently, wax buildup in gas wells can affect the normal operation of the plunger and lifting efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a controllable plunger for gas well drainage and gas extraction in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a controllable plunger for gas well drainage and gas production, comprising:

[0006] The plunger body has multiple annular protrusions on its surface, and a retrieval head is provided on the top of the plunger body;

[0007] Two sets of unblocking and scraping mechanisms are connected to the plunger body, and multiple annular protrusions are located between the two sets of unblocking and scraping mechanisms;

[0008] The unblocking and scraping mechanism includes multiple levers and a center-of-gravity piston. A slide is provided at the bottom of the plunger body. The levers are connected to the plunger body through a first pin. The multiple levers are arranged in a circular array along the axis of the plunger body. A scraper is provided at one end of each lever. The scraper is located outside the plunger body. The center-of-gravity piston is slidably connected in the slide and is connected to and drives the other end of the lever.

[0009] As a further description of the above technical solution:

[0010] The side wall of the plunger body has multiple through holes, which are connected to the slide. The lever passes through the through holes, and the lever corresponds to each through hole. The first pin is located inside the through hole.

[0011] As a further description of the above technical solution:

[0012] The center-of-gravity piston abuts against the inner wall of the slide.

[0013] As a further description of the above technical solution:

[0014] A blind hole is provided on the side wall of the center-of-gravity piston, and a waist-shaped groove is provided on the lever. A second pin is provided in the blind hole and passes through the waist-shaped groove.

[0015] As a further description of the above technical solution:

[0016] The diameter of the second pin is the same as the width of the waist-shaped groove.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] In this invention, two sets of unblocking and scraping mechanisms are set on the plunger body to scrape off the wax. When the plunger body moves, the center-of-gravity piston sliding in the slide rail slides in the slide rail. The sliding of the center-of-gravity piston drives the lever to rotate, so that the scraper scrapes off the wax, avoiding the wax from affecting the normal operation of the plunger body and improving the lifting efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a controllable plunger used for drainage and gas extraction in gas wells.

[0020] Figure 2 An exploded view of a controllable plunger used for drainage and gas extraction in a gas well.

[0021] Figure 3 This is a cross-sectional view of a controllable plunger used for drainage and gas production in gas wells.

[0022] Figure 4 for Figure 3 The usage status is shown in the diagram.

[0023] Legend:

[0024] 1. Plunger body; 2. Annular protrusion; 3. Salvage head; 4. Unblocking and scraping mechanism; 41. Lever; 42. Center-of-gravity piston; 5. Slide rail; 6. First pin; 7. Scraper; 8. Through hole; 9. Blind hole; 10. Waist-shaped groove; 11. Second pin. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution: a controllable plunger for gas well drainage and gas production, comprising:

[0027] The plunger body 1 has multiple annular protrusions 2 on its surface, and a retrieval head 3 is provided on the top of the plunger body 1;

[0028] Two sets of unblocking and scraping mechanisms 4 are connected to the plunger body 1, and multiple annular protrusions 2 are located between the two sets of unblocking and scraping mechanisms 4;

[0029] The unblocking and scraping mechanism 4 includes multiple levers 41 and a center-of-gravity piston 42. A slide 5 is provided at the bottom of the plunger body 1. The levers 41 are connected to the plunger body 1 through a first pin 6. The multiple levers 41 are arranged in a circular array along the axis of the plunger body 1. A scraper 7 is provided at one end of the lever 41. The scraper 7 is located outside the plunger body 1. The center-of-gravity piston 42 is slidably connected in the slide 5 and is connected to and drives the other end of the lever 41.

[0030] The side wall of the plunger body 1 is provided with a plurality of through holes 8, the through holes 8 are connected to the slide rail 5, the lever 41 passes through the through holes 8, and the lever 41 corresponds one-to-one with the through holes 8, and the first pin 6 is provided in the through holes 8.

[0031] The center of gravity piston 42 abuts against the inner wall of the slide 5 to ensure that the center of gravity piston 42 can slide stably along the slide 5;

[0032] A blind hole 9 is provided on the side wall of the center of gravity piston 42, and a waist-shaped groove 10 is provided on the lever 41. A second pin 11 is provided in the blind hole 9. The second pin 11 passes through the waist-shaped groove 10 and slides in the waist-shaped groove 10. It can not only act on the lever 41, but also does not conflict with the degree of freedom of the lever 41 to rotate along the first pin 6.

[0033] The diameter of the second pin 11 is the same as the width of the waist-shaped groove 10, which allows for better linkage between the center-of-gravity piston 42 and the lever 41.

[0034] Working principle: First, when the plunger body 1 descends or rises in the gas well, the center-of-gravity piston 42 slides in the sliding space under the action of inertia. Second, when the center-of-gravity piston 42 is displaced, the second pin 11 slides in the waist-shaped groove 10, which can not only act on the lever 41, but also does not conflict with the degree of freedom of the lever 41 to rotate along the first pin 6. Finally, the rotation of the lever 41 drives the scraper 7 to swing, so that the scraper 7 scrapes off the wax.

[0035] 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 equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A controllable plunger for gas well drainage and gas production, characterized in that: include: The plunger body (1) has multiple annular protrusions (2) on its surface, and a retrieval head (3) is provided on the top of the plunger body (1); Two sets of unblocking and scraping mechanisms (4) are connected to the plunger body (1), and a plurality of the annular protrusions (2) are located between the two sets of unblocking and scraping mechanisms (4); The unblocking and scraping mechanism (4) includes multiple levers (41) and a center-of-gravity piston (42). A slide (5) is provided at the bottom of the plunger body (1). The levers (41) are connected to the plunger body (1) through a first pin (6). The multiple levers (41) are arranged in a ring array along the axis of the plunger body (1). A scraper (7) is provided at one end of the lever (41). The scraper (7) is located outside the plunger body (1). The center-of-gravity piston (42) is slidably connected in the slide (5) and is connected to and drives the other end of the lever (41).

2. The controllable plunger for gas well drainage and gas production according to claim 1, characterized in that, The side wall of the plunger body (1) is provided with a plurality of through holes (8), the through holes (8) are connected to the slide (5), the lever (41) passes through the through holes (8), and the lever (41) corresponds one-to-one with the through holes (8), and the first pin (6) is provided in the through holes (8).

3. A controllable plunger for gas well drainage and gas production according to claim 2, characterized in that, The center-of-gravity piston (42) abuts against the inner wall of the slide (5).

4. A controllable plunger for gas well drainage and gas production according to claim 3, characterized in that, A blind hole (9) is provided on the side wall of the center of gravity piston (42), and a waist-shaped groove (10) is provided on the lever (41). A second pin (11) is provided in the blind hole (9), and the second pin (11) passes through the waist-shaped groove (10).

5. A controllable plunger for gas well drainage and gas production according to claim 4, characterized in that, The diameter of the second pin (11) is the same as the width of the waist-shaped groove (10).

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