CN217976169U - Plunger device for water drainage and gas production - Google Patents

Abstract

The utility model provides a plunger device for drainage gas production, including setting up the plunger body in the tubular column, and set up respectively lubricator top and below the plunger body and card ware, the plunger body can remove between lubricator and card ware, wherein the both ends of the plunger body are provided with first magnet the lower extreme of lubricator and the upper end of card ware are provided with the second magnet respectively, the second magnet sets up to having the same magnetic pole with the adjacent tip of first magnet.

Description

Plunger device for water drainage and gas production

Technical Field

The utility model relates to an oil recovery field, concretely relates to plunger device for drainage gas production.

Background

In the process of oil well exploitation, the plunger gas lift technology is a common water drainage and gas production technology, and the device of the technology mainly comprises an underground clamping device, a plunger body and a blowout prevention pipe. In drainage gas recovery operations, the plunger reciprocates between the retainer and the lubricator. And because the plunger has higher movement speed and stronger impact property, the plunger can quickly impact on the locking device and the blowout preventer in the movement process.

In order to relieve the impact of the plunger on a wellhead in the ascending process and the impact of the plunger falling to the bottom of the well on the locking device, damping springs are usually required to be arranged on the wellhead blowout prevention pipe and the underground locking device. However, in the face of some high pressure gas wells or deep wells, the impact and vibration of the plunger tool is large, and therefore there is a risk of the lubricator failing or the retainer falling. In order to reduce the impact force of the plunger, the size of the buffer spring is increased, but the overall tool is longer, and the blocking phenomenon is easy to occur when the tool is applied to a highly-deviated well and a horizontal well.

SUMMERY OF THE UTILITY MODEL

To the technical problem as above, the utility model aims at providing a plunger device for drainage gas production. The utility model discloses a plunger device for drainage gas production's simple structure, the volume is less, can reduce the impact and the vibrations of plunger instrument effectively, reduces the probability that the fish accident takes place simultaneously.

According to the utility model, a plunger device for water drainage and gas production is provided, which comprises a plunger body arranged in a tubular column, and a lubricator and a retainer which are respectively arranged above and below the plunger body, wherein the plunger can move between the lubricator and the retainer,

first magnets are arranged at two ends of the plunger body, second magnets are arranged at the lower end of the blowout prevention pipe and the upper end of the clamping device respectively, and the end parts of the second magnets, which are adjacent to the first magnets, are provided with the same magnetic poles.

In a preferred embodiment, an elastic member is further provided on the lubricator and the retainer, and the second magnet is connected with the lubricator and the retainer through the elastic member.

In a preferred embodiment, a friction layer is further arranged on the inner wall of the lubricator corresponding to the elastic piece, and the first magnet and the second magnet are arranged to be capable of being connected with the friction layer.

In a preferred embodiment, a buffer layer is further provided at the lower end of the lubricator and the upper end of the retainer, and the buffer layer is made of an elastic material.

In a preferred embodiment, a base is further provided at a lower end of the locking device.

In a preferred embodiment, a support platform is further disposed on the outer wall of the base, and the support platform extends radially out of the base.

In a preferred embodiment, an annular groove is formed in the outer wall of the base, and the end of the support platform extends into the annular groove and is fixedly connected with the groove.

In a preferred embodiment, the first magnet is provided as a magnetic layer covering both ends of the plunger body.

In a preferred embodiment, the elastic member is provided as a disc spring group consisting of a plurality of disc springs.

In a preferred embodiment, the elastic material is provided as a rubber material.

Drawings

The present invention will be described with reference to the accompanying drawings.

Fig. 1 shows a schematic view of a plunger device for drainage gas production according to an embodiment of the present invention.

In the present application, all the figures are schematic and are only intended to illustrate the principles of the present invention and are not drawn to scale.

Detailed Description

The present invention will be described with reference to the accompanying drawings. Hereinafter, the "upper end", "upper side" or the like means an end, a side directed toward the wellhead; the term "lower end", "lower side" or the like refers to the end, side, remote from the wellhead.

Fig. 1 shows a schematic view of a plunger device 100 for drainage gas production according to an embodiment of the present invention. As shown in fig. 1, the plunger device 100 for water drainage and gas production includes a plunger body 10 disposed in a downhole string, a lubricator 20 disposed above the plunger body 10, and a retainer 30 disposed below the plunger body 10. The plunger body 10 is capable of reciprocating between the square nozzle 20 and the stopper 30 by an external force, thereby performing a drainage and gas production operation. The principles of such a water-gas production operation are well known to those skilled in the art, and a detailed description thereof will be omitted.

As shown in fig. 1, first magnets 12 are provided at upper and lower ends of the plunger body 10, respectively. Meanwhile, second magnets 22 are provided at the lower end of the lubricator 20 and the upper end of the stopper 30, respectively. In the present invention, the end of the second magnet 22 adjacent to the first magnet 12 is set to have the same magnetic pole. On the other hand, due to the principle that magnets repel each other in the same polarity, when the plunger body 10 moves to a position close to the lubricator 20 or the retainer 30, the first magnet 12 receives the repulsive force of the second magnet 22, and thus the plunger body 10 is prevented from moving in a direction close to the lubricator 20 or the retainer 30.

It is easy to understand that, due to the repulsive force between the first magnet 12 and the second magnet 22, the movement speed of the plunger body 10 can be effectively reduced when the plunger body 10 approaches the lubricator 20 or the retainer 30, and the plunger body 10 is prevented from impacting the lubricator 20 or the retainer 30 at a high speed, so that the risk of damage or displacement of the lubricator 20 or the retainer 30 is reduced.

In the present invention, the first magnet 12 and the second magnet 22 have the advantages of small size and less damage, so as to help to reduce the volume of the plunger device 100, making it better suitable for a smaller space in the well, and improve the stability and the service life of the plunger device 100, thereby improving the reliability of the plunger device 100.

Meanwhile, when the plunger body 10 collides with the lubricator 20 or the retainer 30 and then continues to move away from the lubricator 20 or the retainer 30, the repulsive force between the first magnet 12 and the second magnet 22 is again formed as a motive force for pushing the plunger body 10 to move, thereby contributing to acceleration of the plunger body 10.

In an embodiment not shown, the first magnet 12 is provided as a magnetic layer covering both ends of the plunger body 10, so that the first magnet 12 and the plunger body 10 are formed as a single body, thereby further reducing the number of the various connecting members 121, thereby further simplifying the structure of the plunger device 100, reducing the volume of the plunger device 100, and preventing the various connecting members 121 from being damaged and failed by high-speed impact, thereby improving the stability of the plunger device 100. Similarly, the second magnet 22 is also integrally formed with the lubricator 20 and the retainer 30, respectively.

As shown in fig. 1, in a preferred embodiment, an elastic member 25 is further disposed on the lubricator 20 and the stopper 30, and the second magnet 22 is connected to the lubricator 20 and the stopper 30 through the elastic member 25. When the second magnet 22 contacts the first magnet 12 in this manner, the elastic member 25 is compressed while the plunger body 10 continues to move in the direction of approaching the lubricator 20 or the stopper 30, and generates an elastic force that hinders the movement of the plunger body 10. The elastic element 25 can play an auxiliary buffering role under the working condition that the impact speed of the plunger body 10 is high, and further reduce the impact force of the plunger body 10.

In the present invention, the elastic member 25 is a disc spring assembly composed of a plurality of disc springs. On one hand, the disc spring set has large load and good buffering effect, on the other hand, the disc spring set has short stroke and small required installation space, and is beneficial to reducing the volume of the whole plunger device 100, so that the plunger device 100 is suitable for narrow space in a well.

Further, a friction layer 28 is disposed on the inner wall of the lubricator 20 corresponding to the elastic member 25. The first magnet 12 is arranged to be able to interface with the friction layer 28. Therefore, when the elastic member 25 is compressed, sliding friction is generated between the friction layer 28 and the first magnet 12, so that the moving speed of the first magnet 12 is reduced, and the impact speed of the plunger body 10 is further reduced.

In an embodiment, not shown, a damping layer is further provided at the lower end of the lubricator 20 and at the upper end of the retainer 30, the damping layer being made of an elastic material, preferably provided as a rubber material. Thus, when the second magnet 22 collides with the lubricator 20 or the retainer 30, the second magnet first collides with the cushion layer, and the cushion layer is elastically deformed at this time, thereby reducing the impact force of the second magnet 22. In this way, the cushion layer can play a role of shock absorption while playing a role of protecting the lubricator 20 and the retainer 30.

In addition, a base 40 is provided at the lower end of the locking device 30. The base 40 is used for supporting the locking device 30, and prevents the locking device 30 from directly contacting with an irregular plane in the well, thereby preventing the locking device 30 from being damaged under high impact force.

Meanwhile, a supporting table 45 is further disposed on an outer wall of the base 40, and the supporting table 45 extends out of the base 40 in the radial direction. Therefore, when the components such as the first magnet 12 and the second magnet 22 above the support platform 45 fall off under impact, the support platform 45 can perform left and right bearing, so that the fallen components such as the first magnet 12 and the second magnet 22 fall on the support platform 45 and can be fished out of the well bottom along with the plunger device 100. Through the arrangement, the fish falling accident can be effectively prevented.

Further, an annular groove (not shown) is provided on the outer wall of the base 45, and the end of the supporting platform 45 extends into the annular groove and forms a fixed connection with the groove, and the connection manner may be, for example, welding. In this way, the stability of the connection between the base 45 and the support table 45 can be further improved, and the support table 45 is prevented from being separated from the base 45 under the action of long-time impact and vibration.

The operation of the plunger device 100 for water drainage and gas production according to the present invention will be briefly described below.

The utility model discloses a plunger device 100 is used for carrying out drainage gas production operation. During the drainage and gas production operation, the plunger body 10 reciprocates between the lubricator 20 and the stopper 30. When the plunger body 10 approaches the lubricator 20 and the retainer 30, a repulsive magnetic force is generated between the second magnet 22 and the first magnet 12, and the impact velocity of the plunger body 10 is reduced, thereby protecting the lubricator 20 and the retainer 30. After the second magnet 22 contacts the first magnet 12, the elastic member 25 is compressed as the first magnet 12 continues to move toward the second magnet 22, thereby generating an elastic force to further reduce the impact velocity of the plunger body 10. In this process, sliding friction is generated between the first magnet 12 and the friction layer 28, and thus the effect of reducing the impact speed of the plunger body 10 can be achieved.

When the second magnet 22 collides with the lubricator 20 or the retainer 30 by the impact of the plunger 10, the buffer layer is elastically deformed to reduce the impact force of the second magnet 22. In this way, the cushion layer can play a role of shock absorption while playing a role of protecting the lubricator 20 and the retainer 30.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and does not constitute any limitation to the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A plunger apparatus for water drainage and gas production, comprising:

a plunger body (10) arranged in the pipe column, and a lubricator tube (20) and a retainer (30) respectively arranged above and below the plunger body, wherein the plunger body can move between the lubricator tube and the retainer,

first magnets (12) are arranged at two ends of the plunger body, second magnets (22) are respectively arranged at the lower end of the lubricator and the upper end of the clamping device, and the end parts of the second magnets, which are adjacent to the first magnets, are arranged to have the same magnetic poles.

2. The plunger device for water drainage and gas production according to claim 1, wherein an elastic member (25) is further provided on the lubricator and the retainer, and the second magnet is connected with the lubricator and the retainer through the elastic member.

3. A plunger device for drainage and gas production according to claim 2, wherein a friction layer (28) is further provided on the inner wall of the lubricator corresponding to the elastic member, and the first and second magnets are arranged to be able to be in contact with the friction layer.

4. The plunger device for water drainage and gas production according to claim 3, wherein a buffer layer is further provided at the lower end of the lubricator and the upper end of the retainer, and the buffer layer is made of an elastic material.

5. The plunger device for drainage and gas production according to any one of claims 1 to 4, wherein a base (40) is further provided at a lower end of the retainer.

6. A plunger device for water drainage and gas production according to claim 5, characterised in that a support platform (45) is also provided on the outer wall of the base, the support platform extending radially out of the base.

7. The plunger device for water drainage and gas production according to claim 6, wherein an annular groove is formed in the outer wall of the base, and the end of the support platform extends into the annular groove and is fixedly connected with the groove.

8. The plunger device for water drainage and gas production according to any one of claims 1 to 4, wherein the first magnet is provided as a magnetic layer covering both ends of the plunger body.

9. A plunger device for water drainage and gas production according to any one of claims 2-4, wherein the elastic member is provided as a disc spring group consisting of a plurality of disc springs.

10. A plunger device for water drainage and gas production according to claim 4, characterised in that the resilient material is provided as a rubber material.

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