Plunger gas lift underground buffer device

Abstract

The utility model discloses a plunger gas lift underground buffer device, which belongs to the technical field of oil and gas field gas production and comprises a fixed column, a plurality of sliding grooves which are distributed in an array and communicated with a movable groove are formed in the fixed column, and sliding columns are slidably connected in the sliding grooves. A plurality of first placement grooves corresponding to the sliding grooves are formed in the outer wall of the movable column, connecting rods are movably connected to the interiors of the first placement grooves, the other ends of the connecting rods are movably connected with the sliding columns, shock absorbers are installed between the sliding columns and the sliding grooves, and the contact plate is collided through falling of the plunger; a contact plate drives a movable column to move downwards in a movable groove, the movable column drives one end of a connecting rod in a first placement groove to move downwards, the other end of the connecting rod drives a sliding column to move downwards in a sliding groove, a shock absorber is extruded, buffering force is provided through the shock absorber, the buffering effect of the device is better, and the device has the advantages that the structure is firm, and the service life is long. The stability is high, and the buffering effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field gas production technical field, especially a kind of plunger gas lift downhole buffer device. BACKGROUND

[0002] With the continuous development of gas field, a large number of gas wells have entered the low pressure, low production stage, single well production is low, and the liquid carrying capacity is poor, the bottom hole and wellbore gradually produce liquid, which seriously affects the gas well production. Plunger gas lift is an effective and economical drainage gas recovery method at home and abroad, the downhole buffer device installed in the wellbore at a certain position in the plunger gas lift equipment system plays a role in limiting the plunger position, sealing the wellbore, one-way flow gas flow and damping the plunger, so the structure design of the downhole buffer device plays a key role in the plunger gas lift device.

[0003] When the plunger gas lift well is downhole production, plunger buffer fishing and other work, the plunger needs to be dropped onto the stopper and oil pipe, but due to the great inertia when the plunger falls, the existing buffer device has simple structure, is not firm enough, has poor stability, and the buffering effect is general, when the plunger reaches the buffer device, it is easy to cause the buffer device to fall down, causing damage to the stopper, and causing great safety threat to the oil well pipe column. UTILITY MODEL CONTENT

[0004] To solve the problems in the above background, the utility model provides a kind of plunger gas lift downhole buffer device, with firm structure, strong stability and good buffering effect.

[0005] The utility model is realized in this way, a kind of plunger gas lift downhole buffer device, including fixed column, the upper end surface of the fixed column is provided with movable slot, the inside of the movable slot is slidably connected with movable column, the upper end surface of the movable column extends to the above movable slot and is fixedly connected with contact plate;

[0006] The inside of the fixed column is provided with cavity communicated with movable slot, the lower end surface of the movable column extends to the inside of cavity;

[0007] The inside of the fixed column is provided with a plurality of array distribution and the sliding slot communicated with movable slot, the inside of the sliding slot is slidably connected with sliding column, the outer wall of the movable column is provided with a plurality of first installation groove corresponding with sliding slot, the inside of the first installation groove is movably connected with connecting rod, the other end of the connecting rod is movably connected with sliding column, and the shock absorber is installed between the sliding column and the sliding slot.

[0008] In order to make the slider move on the slide rod, as a plunger gas lift downhole buffer device of the utility model is preferred, the inside of the cavity is fixedly connected with a slide rod, the outer wall of the slide rod is slidably connected with two symmetrically distributed sliders, the lower end face of the movable column is provided with two symmetrically distributed second installation grooves, the inside of the two second installation grooves is movably connected with a support rod, and the other end of the support rod is movably connected with the slider.

[0009] In order to reduce the impact force of the contact plate on the fixed column, as a plunger gas lift downhole buffer device of the utility model is preferred, the upper end face of the fixed column is fixedly connected with a buffer ring located directly below the contact plate.

[0010] In order to prevent the plunger from being damaged by impact with the contact plate, as a plunger gas lift downhole buffer device of the utility model is preferred, the upper end face of the contact plate is fixedly connected with a rubber plate.

[0011] In order to prevent the slider from being damaged by impact with the inner wall of the cavity, as a plunger gas lift downhole buffer device of the utility model is preferred, a spring is arranged between the slider and the inner wall of the cavity and sleeved on the outer wall of the slide rod.

[0012] In order to prevent the shock absorber from being damaged, as a plunger gas lift downhole buffer device of the utility model is preferred, the stroke of the shock absorber is greater than the distance between the contact plate and the buffer ring.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model discloses, through the plunger falling impact contact plate, make contact plate drive movable column in the inside of the movable groove and move down, through movable column drive the one end of the connecting rod in the first installation groove and move down, make the other end of the connecting rod drive the slide column in the inside of the sliding groove and move down, extrude shock absorber, through shock absorber provides buffer force, through the array distribution of multiple shock absorbers, make the structure of device more stable, evenly share the impact force of plunger, slowly release the energy of plunger falling, make the buffer effect of device better.

[0015] In addition, the utility model discloses, through movable column in the inside of the movable groove and move down, make the lower end of movable column enter the inside of the cavity, through the one end of the support rod in the second installation groove and move down, make support rod change angle, make the other end of support rod drive slider on the outer wall of slide rod and move to the inner wall of cavity, support movable column, make the structure of movable column more stable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is whole structural drawing of the utility model kind of plunger gas lift downhole buffer device;

[0017] Fig. 2The utility model discloses an integral cut structure diagram.

[0018] Fig. 3 The utility model discloses a partial structural drawing.

[0019] In the drawing, 1, fixed column, 2, movable slot, 3, sliding slot, 4, cavity, 5, movable column, 6, first installation slot, 7, contact plate, 8, rubber plate, 9, buffer ring, 10, connecting rod, 11, sliding column, 12, shock absorber, 13, second installation slot, 14, sliding rod, 15, support rod, 16, sliding block, 17, spring. Specific implementation

[0020] In order to make the utility model's purpose, technical scheme and advantage more clearly clear, following combining with the drawing and example, this utility model carries out further detailed explanation.It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0021] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.In addition, in the description of the utility model, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0022] Please refer to Figs. 1-3 A plunger gas lift downhole buffer device, including fixed column 1, the upper end surface of fixed column 1 is provided with movable slot 2, movable slot 2 is slidably connected with movable column 5 in the inside, the upper end surface of movable column 5 extends to the above of movable slot 2 and is fixedly connected with contact plate 7;

[0023] The inside of fixed column 1 is provided with cavity 4 that is communicated with movable slot 2, and the lower end surface of movable column 5 extends to the inside of cavity 4;

[0024] The inside of fixed column 1 is provided with a plurality of array distribution and the sliding slot 3 that is communicated with movable slot 2, and the inside of sliding slot 3 is slidably connected with sliding column 11, and the outer wall of movable column 5 is provided with a plurality of first installation slot 6 corresponding with sliding slot 3, and first installation slot 6 is movably connected with connecting rod 10 in the inside, and the other end of connecting rod 10 is movably connected with sliding column 11, and shock absorber 12 is installed between sliding column 11 and sliding slot 3.

[0025] In the embodiment, the plunger falls and hits the contact plate 7, the contact plate 7 drives the movable column 5 to move downwards in the movable groove 2, one end of the connecting rod 10 in the first installation groove 6 is driven by the movable column 5 to move downwards, the other end of the connecting rod 10 drives the sliding column 11 to move downwards in the sliding groove 3, the shock absorber 12 is pressed, the buffering force is provided by the shock absorber 12, the device is more stable in structure by array distribution of a plurality of groups of shock absorbers 12, the impact force of the plunger is evenly shared, the energy of the plunger falling is slowly released, and the buffering effect of the device is better.

[0026] As a technical optimization scheme of the utility model, the cavity 4 is internally fixedly connected with a sliding rod 14, the outer wall of the sliding rod 14 is slidably connected with two symmetrically distributed sliding blocks 16, the lower end face of the movable column 5 is provided with two symmetrically distributed second installation grooves 13, and the two second installation grooves 13 are all movably connected with supporting rods 15, and the other ends of the supporting rods 15 are movably connected with the sliding blocks 16.

[0027] In the embodiment, the movable column 5 moves downwards in the movable groove 2, the lower end of the movable column 5 enters the inside of the cavity 4, one end of the supporting rod 15 in the second installation groove 13 moves downwards, the supporting rod 15 changes the angle, the other end of the supporting rod 15 drives the sliding block 16 to move to the inner wall of the cavity 4 on the outer wall of the sliding rod 14, the movable column 5 is supported, and the structure of the movable column 5 is more stable.

[0028] As a technical optimization scheme of the utility model, the upper end face of the fixed column 1 is fixedly connected with a buffer ring 9 located directly below the contact plate 7.

[0029] In the embodiment, the contact plate 7 moves downwards and contacts the buffer ring 9, the buffer ring 9 provides the buffering force for the contact plate 7, a part of the impact force is reduced, and the contact plate 7 is prevented from being damaged by directly contacting the upper end face of the fixed column 1.

[0030] As a technical optimization scheme of the utility model, the upper end face of the contact plate 7 is fixedly connected with a rubber plate 8.

[0031] In the embodiment, the rubber plate 8 prevents the plunger from being damaged by directly contacting the upper end face of the contact plate 7.

[0032] As a technical optimization scheme of the utility model, the spring 17 is arranged between the sliding block 16 and the inner wall of the cavity 4 and is sleeved on the outer wall of the sliding rod 14.

[0033] In the embodiment, the spring 17 prevents the sliding block 16 from being damaged by contacting the inner wall of the cavity 4.

[0034] As a technical optimization scheme of the utility model, the stroke of the shock absorber 12 is greater than the distance between the contact plate 7 and the buffer ring 9.

[0035] In the embodiment, the stroke of the shock absorber 12 is greater than the distance between the contact plate 7 and the buffer ring 9, so that damage to the shock absorber 12 caused by exceeding the stroke of the shock absorber 12 is prevented.

[0036] The working principle and use process of the utility model are as follows: firstly, the plunger falls, direct contact of the plunger and the upper end surface of the contact plate 7 is prevented through the rubber plate 8, the contact plate 7 is impacted by the plunger, the contact plate 7 drives the movable column 5 to move downwards in the inside of the movable groove 2, one end of the connecting rod 10 in the inside of the first installation groove 6 is driven by the movable column 5 to move downwards, the other end of the connecting rod 10 drives the sliding column 11 to move downwards in the inside of the sliding groove 3, the shock absorber 12 is extruded, then buffer force is provided through the shock absorber 12, the structure of the device is more stable through the array distribution of multiple groups of shock absorbers 12, the impact force of the plunger is evenly shared, the energy of the plunger falling is slowly released, and the buffer effect of the device is better.

[0037] When the stroke limit of the shock absorber 12 is almost reached, the contact plate 7 is in contact with the buffer ring 9, buffer force is provided to the contact plate 7 through the buffer ring 9, a part of the impact force is reduced, and damage caused by direct contact of the contact plate 7 and the upper end surface of the fixed column 1 is prevented.

[0038] Meanwhile, the lower end of the movable column 5 enters the inside of the cavity 4 through the downward movement of the movable column 5 in the inside of the movable groove 2, then one end of the supporting rod 15 in the inside of the second installation groove 13 is driven to move downwards, the supporting rod 15 changes the angle, the other end of the supporting rod 15 drives the sliding block 16 to move to the inner wall of the cavity 4 from the outer wall of the sliding rod 14, the movable column 5 is supported, and the structure of the movable column 5 is more stable.

[0039] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A plunger gas lift downhole buffer device, comprising a fixed column (1), characterized in that: The upper end face of the fixed column (1) is provided with a movable groove (2), and a movable column (5) is slidably connected inside the movable groove (2). The upper end face of the movable column (5) extends above the movable groove (2) and is fixedly connected with a contact plate (7). The fixed column (1) has a cavity (4) that communicates with the movable groove (2) inside, and the lower end face of the movable column (5) extends into the cavity (4). The fixed column (1) has multiple arrayed sliding grooves (3) that are connected to the movable groove (2). The sliding groove (3) is slidably connected to a sliding column (11). The outer wall of the movable column (5) has multiple first placement grooves (6) corresponding to the sliding grooves (3). The first placement groove (6) is movably connected to a connecting rod (10). The other end of the connecting rod (10) is movably connected to the sliding column (11). A shock absorber (12) is installed between the sliding column (11) and the sliding groove (3).

2. The plunger gas lift downhole buffer device according to claim 1, characterized in that: The cavity (4) is fixedly connected to a slide rod (14), and two symmetrically distributed sliders (16) are slidably connected to the outer wall of the slide rod (14). The lower end face of the movable column (5) is provided with two symmetrically distributed second mounting grooves (13), and a support rod (15) is movably connected inside each of the two second mounting grooves (13). The other end of the support rod (15) is movably connected to the slider (16).

3. The plunger gas lift downhole buffer device according to claim 1, characterized in that: The upper end face of the fixed column (1) is fixedly connected to a buffer ring (9) located directly below the contact plate (7).

4. The plunger gas lift downhole buffer device according to claim 1, characterized in that: A rubber plate (8) is fixedly connected to the upper end face of the contact plate (7).

5. A plunger gas lift downhole buffer device according to claim 2, characterized in that: A spring (17) sleeved on the outer wall of the slide rod (14) is provided between the slider (16) and the inner wall of the cavity (4).

6. The plunger gas lift downhole buffer device according to claim 1, characterized in that: The stroke of the shock absorber (12) is greater than the distance between the contact plate (7) and the buffer ring (9).

Images