Vibration reduction structure of multi-parameter sensing plunger

Abstract

The damping structure comprises an outer pipe, a fishing head, a plug and a collecting assembly, the two ends of the outer pipe are connected with the fishing head and the plug correspondingly, the collecting assembly is arranged in the outer pipe and is in clearance fit with the outer pipe, and a first permanent magnet and a fourth permanent magnet are arranged in the fishing head and the plug correspondingly; the end, close to the fishing head, of the collecting assembly is provided with a second permanent magnet, the end, close to the plug, of the collecting assembly is provided with a third permanent magnet, the first permanent magnet and the second permanent magnet are arranged in a homopolar opposite mode, and the third permanent magnet and the fourth permanent magnet are arranged in a homopolar opposite mode. The paired mutually-exclusive permanent magnets are installed at the two ends and the circumferential direction of the fishing head, the plug and the collecting assembly, non-contact vibration reduction of the multi-parameter sensing plunger in the up-down process is achieved, and the device has the advantages of being simple in structure, convenient to install, high in reliability and low in cost.

Description

Technical Field

[0001] This invention relates to the field of downhole instrument technology for oilfield gas wells, specifically to a vibration reduction structure for a multi-parameter sensing plunger. Background Technology

[0002] In the mid-to-late stages of gas well development, increased water production necessitates drainage for gas recovery. A common drainage technique is plunger lift, where a plunger moves automatically up and down within the tubing under formation energy according to a pre-set drainage schedule. To monitor well fluid accumulation and production dynamics in real time and analyze changes in the producing formation, multi-parameter sensing plungers are currently tested for key parameters such as pressure, temperature, and position. These plungers require circuit boards, pressure sensors, temperature sensors, position sensors, and batteries. However, during the up-and-down movement, the instrument experiences impacts from collisions with the tubing wall, downhole locking device, and wellhead blowout preventer (BOP). The impact at the wellhead BOP can reach 1000g, necessitating vibration damping design to prevent damage to the circuit boards, sensors, and batteries. Currently, spring damping is commonly used; however, after a period of use, spring deformation degrades the damping effect, leading to damage to the circuit boards, sensors, and batteries, rendering the instrument unusable and unreliable for long-term installation and testing. Therefore, the existing technology has the following shortcomings and requires further improvement. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a vibration reduction structure for a multi-parameter sensing plunger, which is simple in structure, easy to install, has good buffering effect, and high reliability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a vibration reduction structure for a multi-parameter sensing plunger, comprising an outer tube, a retrieval head, a plug, and a data acquisition component. The two ends of the outer tube are respectively connected to the retrieval head and the plug. The data acquisition component is disposed inside the outer tube and is fitted with a clearance between the outer tube and the outer tube. The retrieval head and the plug are respectively provided with a first permanent magnet and a fourth permanent magnet. A second permanent magnet is disposed at the end of the data acquisition component near the retrieval head, and a third permanent magnet is disposed at the end near the plug. The first permanent magnet and the second permanent magnet are arranged opposite each other with the same pole, and the third permanent magnet and the fourth permanent magnet are arranged opposite each other with the same pole.

[0005] The acquisition component is also provided with damping rubber rings at both ends, and the damping rubber rings are disposed between the second permanent magnet and the third permanent magnet.

[0006] The first and second permanent magnets are hollow cylindrical structures. The acquisition component is equipped with an antenna that passes through the second and first permanent magnets in sequence and is wirelessly connected to an external control source.

[0007] A sealing ring is provided at the connection between the outer tube and the retrieval head and the plug.

[0008] The data acquisition components include a pressure sensor, a temperature sensor, and a position sensor.

[0009] The beneficial effects of the present invention are as follows: Compared with the prior art, the present invention achieves non-contact vibration reduction of the multi-parameter sensing plunger during its up and down process by installing pairs of mutually repulsive permanent magnets at both ends and in the circumferential direction of the retrieval head, the plug, and the acquisition component. It utilizes the repulsive effect between multiple sets of permanent magnets to achieve a buffering effect, and has the advantages of simple structure, convenient installation, high reliability and low cost, which can meet the long-term installation and testing requirements of the instrument. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings:

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] In the diagram: 1. Retrieval head; 2. First permanent magnet; 3. Second permanent magnet; 4. Damping rubber ring; 5. Acquisition component; 6. Outer tube; 7. Third permanent magnet; 8. Plug; 9. Fourth permanent magnet; 10. Antenna; 11. Sealing ring. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] The technical solution of the present invention will be described in detail below with reference to specific embodiments. The following specific embodiments may be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0015] Example 1

[0016] like Figure 1 As shown, the present invention provides a vibration reduction structure for a multi-parameter sensing plunger, including an outer tube 6, a retrieval head 1, a plug 8, and a data acquisition component 5. The two ends of the outer tube 6 are respectively connected to the retrieval head 1 and the plug 8. The data acquisition component 5 is disposed inside the outer tube 6 and is clearance-fitted with the outer tube 6. The retrieval head 1 and the plug 8 are respectively provided with a first permanent magnet 2 and a fourth permanent magnet 9. A second permanent magnet 3 is disposed at the end of the data acquisition component 5 near the retrieval head 1, and a third permanent magnet 7 is disposed at the end near the plug 8. The first permanent magnet 2 and the second permanent magnet 3 are arranged opposite each other with the same pole, and the third permanent magnet 7 and the fourth permanent magnet 9 are arranged opposite each other with the same pole.

[0017] When the multi-parameter sensing plunger is subjected to an upward axial impact, the acquisition component is made to float inside the outer tube 6 by using the principle of mutual repulsion of the same poles of multiple sets of permanent magnets to buffer and reduce vibration, thus avoiding the problems of easy deformation and poor reliability of traditional spring vibration reduction.

[0018] Furthermore, damping rubber rings 4 are respectively provided at both ends of the acquisition component 5, and the damping rubber rings 4 are disposed between the second permanent magnet 3 and the third permanent magnet 7. The circumferential vibration of the acquisition component 5 is reduced by the damping rubber rings 4.

[0019] Furthermore, in order to facilitate wireless communication between the antenna 10 on the acquisition component 5 and the acquisition component 5, the first permanent magnet 2 and the second permanent magnet 3 are hollow cylindrical structures. The acquisition component is equipped with an antenna 10 that passes through the second permanent magnet 3 and the first permanent magnet 2 in sequence to wirelessly communicate with an external control source.

[0020] Furthermore, a sealing ring 11 is provided at the connection between the outer tube 6 and the retrieval head 1 and the plug 8. The sealing ring 11 ensures the stability of the connection between the outer tube 6 and the retrieval head 1 and the plug 8, and prevents the infiltration of external media.

[0021] Furthermore, the acquisition component 5 includes a pressure sensor, a temperature sensor, and a position sensor to acquire and test key parameters such as pressure, temperature, and position.

[0022] In addition to the preferred embodiments described above, the present invention has other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection claimed by the present invention.

Claims

1. A vibration reduction structure for a multi-parameter sensing plunger, characterized in that, The device includes an outer tube (6), a retrieval head (1), a plug (8), and a collection component (5). The two ends of the outer tube (6) are connected to the retrieval head (1) and the plug (8), respectively. The collection component (5) is set inside the outer tube (6) and is fitted with the outer tube (6) with a gap. The retrieval head (1) and the plug (8) are respectively provided with a first permanent magnet (2) and a fourth permanent magnet (9). The collection component (5) is provided with a second permanent magnet (3) at one end near the retrieval head (1) and a third permanent magnet (7) at one end near the plug (8). The first permanent magnet (2) and the second permanent magnet (3) are arranged opposite each other with the same pole, and the third permanent magnet (7) and the fourth permanent magnet (9) are arranged opposite each other with the same pole.

2. The vibration reduction structure of a multi-parameter sensing plunger according to claim 1, characterized in that, The acquisition component (5) is also provided with damping rubber rings (4) at both ends, and the damping rubber rings (4) are located between the second permanent magnet (3) and the third permanent magnet (7).

3. The vibration reduction structure of a multi-parameter sensing plunger according to claim 1, characterized in that, The first permanent magnet (2) and the second permanent magnet (3) are hollow cylindrical structures. The acquisition component is equipped with an antenna (10) that passes through the second permanent magnet (3) and the first permanent magnet (2) in sequence to wirelessly communicate with the external control source.

4. The vibration reduction structure of a multi-parameter sensing plunger according to claim 1, characterized in that, A sealing ring (11) is provided at the connection between the outer tube (6) and the retrieval head (1) and the plug (8).

5. The vibration reduction structure of a multi-parameter sensing plunger according to claim 1, characterized in that, The acquisition component (5) includes a pressure sensor, a temperature sensor, and a position sensor.

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