Downhole liquid drainage type throttler

Abstract

The utility model relates to the technical field of throttlers, in particular to an underground liquid drainage type throttler which comprises a casing pipe, a throttler body is connected to the inner wall of the casing pipe in a sliding mode, a conical slip bowl is fixedly connected to the outer surface of the throttler body, an outer threaded pipe is fixedly connected to the outer surface of the casing pipe, and the outer threaded pipe is fixedly connected to the inner wall of the casing pipe. The outer surface of the outer threaded pipe is in threaded connection with a threaded sleeve. The arc-shaped slip has the advantages that when the arc-shaped slip needs to be replaced, a worker can twist the threaded sleeve to enable the threaded sleeve to rotate relative to the outer threaded pipe, the threaded sleeve can be driven to move downwards through threaded transmission, the connecting pipe can be driven to rotate in the connecting sleeve when the threaded sleeve rotates, and the connecting sleeve can be driven to move downwards synchronously; the pressing disc can be driven to be far away from the assembling plate through transmission of the connecting rod, locking of the assembling plate can be relieved until the clamping plate completely moves out of the clamping groove, then the damaged arc-shaped slip is pulled to drive the assembling plate to move out of the assembling groove, and rapid disassembling of the arc-shaped slip can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of throttles, in particular to an underground liquid-draining throttle. Background Art

[0002] Downhole chokes play a crucial role in oil and gas well production. They not only effectively control the flow rate of downhole fluids, preventing them from eroding the wellbore wall and reducing the risk of wellbore collapse, but also reduce bottomhole pressure through throttling, facilitating smooth oil and gas extraction. The downhole choke's shaping device, as its core component, significantly impacts its functionality, stability, and ease of maintenance.

[0003] Currently, downhole drainage chokes often use a locking sleeve to secure their position. This sleeve opens and closes to facilitate installation and removal of the choke. However, due to direct contact and friction with the wellbore wall, it is prone to wear over time. Severe wear of the sleeve directly impacts the stability and service life of the choke. Furthermore, since the sleeve is typically mounted in the middle of the choke, removal and replacement are complex, requiring significant time and labor. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] Therefore, one purpose of the present invention is to provide a downhole liquid-discharging choke to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the present invention provides a downhole drainage throttle, including a casing, the inner wall of the casing is slidably connected to the throttle body, the outer surface of the throttle body is fixedly connected to a conical slip seat, the outer surface of the casing is fixedly connected to an externally threaded pipe, the outer surface of the externally threaded pipe is threadedly connected to a threaded sleeve, the axis of the threaded sleeve, the threaded pipe and the casing coincide, the bottom surface of the threaded sleeve is fixedly connected to a connecting pipe, the casing is located inside the connecting pipe, the outer surface of the connecting pipe is rotatably connected to a connecting sleeve, the connecting sleeve is rotatably connected to the casing, the bottom surface of the connecting sleeve is fixedly connected to a plurality of connecting rods in a linear array, and the outer surface of the casing is fixedly connected to It is connected to an assembly ring, and several of the connecting rods are slidingly connected to the assembly ring. The bottom ends of several connecting rods are fixedly connected to pressure plates, and the pressure plate is located directly below the assembly ring. The pressure plate is slidingly connected to the throttle body. The bottom surface of the assembly ring is provided with several assembly grooves in a circumferential array, and the inner wall of each assembly groove is slidingly connected to an assembly plate, and the bottom surface of each assembly plate is fixedly connected to an elastic plate, and the bottom end of the elastic plate is fixedly connected to an arc-shaped slip, and several of the arc-shaped slips are slidingly connected to the conical slip seat, and the top surface of the pressure plate is fitted with the bottom surface of the assembly plate, and the top surface of the pressure plate is fixedly connected to several clamping plates in a circumferential array, and several of the clamping plates are respectively clamped to several assembly plates.

[0007] Preferably, any of the above schemes is that the outer surface of the throttle body is fixedly connected to a support ring, the outer surface of the support ring is provided with a plurality of circumferential array avoidance grooves, and the plurality of elastic plates are slidably connected to the support ring through the plurality of avoidance grooves.

[0008] Preferably, any of the above schemes is that a through hole is formed through the top surface of the pressure plate, and the pressure plate is slidably connected to the throttle body through the through hole.

[0009] Preferably, from any of the above solutions, a plurality of connecting holes in a circumferential array are formed through the top surface of the assembly ring, and the plurality of connecting rods are slidably connected to the assembly ring through the plurality of connecting holes.

[0010] Preferably, any of the above schemes is that a rotating ring is fixedly connected to the outer surface of the connecting sleeve, a rotating groove is provided on the outer surface of the connecting pipe, and the rotating ring is rotatably connected to the connecting pipe through the rotating groove.

[0011] Preferably, in any of the above solutions, a card slot is provided on the bottom surface of each assembly plate, and a plurality of the card plates are respectively connected to a plurality of assembly plates via the card slots.

[0012] Preferably, any of the above schemes is provided with a positioning hole on the inner wall of the assembly groove, a positioning pin is fixedly connected to one side of the assembly plate, and the positioning pin is slidably connected to the assembly ring through the positioning hole.

[0013] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0014] 1. When the arc slip needs to be replaced, the staff can twist the threaded sleeve to rotate it relative to the external threaded pipe. The threaded sleeve can be driven to move downward through the threaded transmission. When the threaded sleeve rotates, the connecting pipe can be driven to rotate inside the connecting sleeve, and the connecting sleeve can be driven to move downward synchronously. The pressure plate can be driven away from the assembly plate through the transmission of the connecting rod until the card plate is completely moved out of the slot. The lock of the assembly plate can be released, and then the damaged arc slip can be pulled to drive the assembly plate to move out of the assembly slot, so that the arc slip can be quickly disassembled.

[0015] 2. After the damaged arc slip is disassembled, take out the new arc slip and insert the assembly plate into the assembly slot. Then reverse the threaded sleeve to drive the pressure plate upward until the top surface of the pressure plate fits with the bottom surface of the assembly plate. At this time, the card plate will be inserted into the card slot, which can realize the quick locking of the assembly plate, so that the new arc slip can be quickly installed without spending a lot of time and manpower costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the assembly of the utility model;

[0017] Figure 2 This is a schematic diagram of the assembly structure of the sleeve of the utility model;

[0018] Figure 3 This is a schematic diagram of the explosion structure of the casing of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the casing of the utility model;

[0020] Figure 5 This is a schematic diagram of the exploded structure of the threaded sleeve of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the arc-shaped slips of the utility model.

[0022] In the figure: 1-sleeve, 2-throttle body, 3-conical slip seat, 4-external threaded pipe, 5-threaded sleeve, 6-connecting pipe, 7-connecting sleeve, 8-connecting rod, 9-assembly ring, 10-pressure plate, 11-assembly groove, 12-assembly plate, 13-elastic plate, 14-arc slip, 15-clamping plate, 16-support ring, 17-avoidance groove, 18-through hole, 19-connecting hole, 20-rotating ring, 21-rotating groove, 22-clamping groove, 23-positioning hole, 24-positioning pin. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0024] like Figures 1 to 5 As shown, a downhole drainage throttle comprises a casing 1, the inner wall of the casing 1 is slidably connected to a throttle body 2, the outer surface of the throttle body 2 is fixedly connected to a conical slip seat 3, the outer surface of the casing 1 is fixedly connected to an externally threaded pipe 4, the outer surface of the externally threaded pipe 4 is threadedly connected to a threaded sleeve 5, the axis of the threaded sleeve 5, the threaded pipe 4 and the casing 1 coincide with each other, the bottom surface of the threaded sleeve 5 is fixedly connected to a connecting pipe 6, the casing 1 is located inside the connecting pipe 6, the outer surface of the connecting pipe 6 is rotatably connected to a connecting sleeve 7, the connecting sleeve 7 is rotatably connected to the casing 1, the bottom surface of the connecting sleeve 7 is fixedly connected to a plurality of connecting rods 8 in a linear array, the outer surface of the casing 1 is fixedly connected to an assembly ring 9, and the plurality of connecting rods 8 are all connected to the assembly ring 9 Sliding connection, the bottom ends of several connecting rods 8 are fixedly connected with pressure plates 10, which are located directly below the assembly ring 9. The pressure plate 10 is slidingly connected to the throttle body 2, and the bottom surface of the assembly ring 9 is provided with several circumferential array assembly grooves 11. The inner wall of each assembly groove 11 is slidingly connected with an assembly plate 12, and the bottom surface of each assembly plate 12 is fixedly connected with an elastic plate 13, and the bottom end of the elastic plate 13 is fixedly connected with an arc-shaped slip valve 14. Several arc-shaped slip valves 14 are all slidingly connected with the conical slip valve seat 3, and the top surface of the pressure plate 10 is fitted with the bottom surface of the assembly plate 12. The top surface of the pressure plate 10 is fixedly connected with several circumferential array clamping plates 15, and several clamping plates 15 are respectively clamped with several assembly plates 12.

[0025] As an optional technical solution of the present invention, a support ring 16 is fixedly connected to the outer surface of the throttle body 2, and a plurality of circumferential array avoidance grooves 17 are opened on the outer surface of the support ring 16. A plurality of elastic plates 13 are slidingly connected to the support ring 16 through the plurality of avoidance grooves 17.

[0026] As an optional technical solution of the present invention, a through hole 18 is opened through the top surface of the pressure plate 10, and the pressure plate 10 is slidingly connected to the throttle body 2 through the through hole 18. The pressure plate 10 can be driven away from the assembly plate 12 through the transmission of the connecting rod 8 until the card plate 15 is completely moved out of the card slot 22, and the lock on the assembly plate 12 can be released.

[0027] As an optional technical solution of the present invention, a plurality of connecting holes 19 in a circumferential array are formed through the top surface of the assembly ring 9 , and a plurality of connecting rods 8 are slidingly connected to the assembly ring 9 through the plurality of connecting holes 19 .

[0028] As an optional technical solution of the present invention, a rotating ring 20 is fixedly connected to the outer surface of the connecting sleeve 7, and a rotating groove 21 is opened on the outer surface of the connecting tube 6. The rotating ring 20 is rotatably connected to the connecting tube 6 through the rotating groove 21. The setting of the rotating ring 20 can prevent the connecting tube 6 from detaching from the connecting sleeve 7.

[0029] As an optional technical solution of the present invention, a card slot 22 is provided on the bottom surface of each assembly plate 12, and several card plates 15 are respectively connected to several assembly plates 12 through the card slots 22. The reverse threaded sleeve 5 drives the pressure plate 10 to move upward until the top surface of the pressure plate 10 is in contact with the bottom surface of the assembly plate 12. At this time, the card plate 15 will be inserted into the card slot 22, and the assembly plate 12 can be quickly locked.

[0030] As an optional technical solution of the present invention, a positioning hole 23 is provided on the inner wall of the assembly groove 11, and a positioning pin 24 is fixedly connected to one side of the assembly plate 12. The positioning pin 24 is slidingly connected to the assembly ring 9 through the positioning hole 23. The assembly plate 12 is clamped with the assembly ring 9 through the positioning pin 24, which can make the connection between the assembly plate 12 and the assembly ring 9 more stable.

[0031] A downhole drainage throttle, the working principle is as follows:

[0032] 1): Twist the threaded sleeve 5 to rotate relative to the external threaded tube 4, and the threaded sleeve 5 can be driven to move downward through the thread transmission. When the threaded sleeve 5 rotates, it can drive the connecting tube 6 to rotate inside the connecting sleeve 7, and can drive the connecting sleeve 7 to move downward synchronously.

[0033] 2): The pressure plate 10 can be driven away from the assembly plate 12 through the transmission of the connecting rod 8 until the clamping plate 15 is completely moved out of the clamping slot 22, and then the lock on the assembly plate 12 can be released. Then, the damaged arc-shaped cava 14 can be pulled to drive the assembly plate 12 to move out of the assembly slot 11, so that the arc-shaped cava 14 can be quickly disassembled.

[0034] 3): Take out the new arc-shaped slip plate 14 and insert the assembly plate 12 into the assembly groove 11, then reverse the threaded sleeve 5 to drive the pressure plate 10 to move upward until the top surface of the pressure plate 10 is in contact with the bottom surface of the assembly plate 12. At this time, the card plate 15 will be inserted into the card slot 22, and the assembly plate 12 can be quickly locked.

[0035] In summary, when the downhole drainage throttle needs to be replaced with the arc-shaped slip 14, the staff can twist the threaded sleeve 5 to rotate it relative to the external threaded pipe 4, and the threaded sleeve 5 can be driven to move downward through the threaded transmission. When the threaded sleeve 5 rotates, it can drive the connecting pipe 6 to rotate inside the connecting sleeve 7, and can drive the connecting sleeve 7 to move downward synchronously. The pressure plate 10 can be driven away from the assembly plate 12 by the transmission of the connecting rod 8. After the card plate 15 is completely moved out of the card slot 22, the lock of the assembly plate 12 can be released, and then the damaged arc-shaped slip 14 can be pulled out. The movable assembly plate 12 moves out of the assembly groove 11, which can realize the rapid disassembly of the arc cava 14. After the damaged arc cava 14 is disassembled, the new arc cava 14 is taken out and the assembly plate 12 is inserted into the assembly groove 11. Then, the threaded sleeve 5 is reversed to drive the pressure plate 10 to move upward until the top surface of the pressure plate 10 is in contact with the bottom surface of the assembly plate 12. At this time, the card plate 15 will be inserted into the card slot 22, which can realize the rapid locking of the assembly plate 12, so that the new arc cava 14 can be quickly installed without consuming a lot of time and manpower costs.

Claims

1. A downhole drainage choke, characterized by: The invention comprises a sleeve (1), wherein the inner wall of the sleeve (1) is slidably connected to a throttle body (2), the outer surface of the throttle body (2) is fixedly connected to a conical slip seat (3), the outer surface of the sleeve (1) is fixedly connected to an external threaded tube (4), the outer surface of the external threaded tube (4) is threadedly connected to a threaded sleeve (5), the axis of the threaded sleeve (5), the threaded tube (4) and the sleeve (1) coincide with each other, the bottom surface of the threaded sleeve (5) is fixedly connected to a connecting tube (6), the sleeve (1) is located inside the connecting tube (6), the outer surface of the connecting tube (6) is rotatably connected to a connecting sleeve (7), the connecting sleeve (7) is rotatably connected to the sleeve (1), the bottom surface of the connecting sleeve (7) is fixedly connected to a plurality of linear array connecting rods (8), the outer surface of the sleeve (1) is fixedly connected to an assembly ring (9), and the plurality of connecting rods (8) are all slidably connected to the assembly ring (9). The bottom ends of several connecting rods (8) are fixedly connected with a pressure plate (10), and the pressure plate (10) is located directly below the assembly ring (9). The pressure plate (10) is slidably connected to the throttle body (2). The bottom surface of the assembly ring (9) is provided with several assembly grooves (11) in a circumferential array. The inner wall of each assembly groove (11) is slidably connected with an assembly plate (12). The bottom surface of each assembly plate (12) is fixedly connected with an elastic plate (13). The bottom end of the elastic plate (13) is fixedly connected with an arc-shaped slip plate (14). Several arc-shaped slip plates (14) are slidably connected with the conical slip plate seat (3). The top surface of the pressure plate (10) is in contact with the bottom surface of the assembly plate (12). The top surface of the pressure plate (10) is fixedly connected with several clamping plates (15) in a circumferential array. Several clamping plates (15) are respectively clamped with several assembly plates (12).

2. A downhole drainage choke according to claim 1, characterized in that: The outer surface of the throttle body (2) is fixedly connected to a support ring (16), and the outer surface of the support ring (16) is provided with a plurality of circumferential array avoidance grooves (17), and a plurality of the elastic plates (13) are slidably connected to the support ring (16) through the plurality of avoidance grooves (17).

3. The downhole drainage choke according to claim 2, characterized in that: A through hole (18) is provided through the top surface of the pressure plate (10), and the pressure plate (10) is slidably connected to the throttle body (2) via the through hole (18).

4. A downhole drainage choke according to claim 3, characterized in that: The top surface of the assembly ring (9) is penetrated by a plurality of connection holes (19) in a circumferential array, and the plurality of connecting rods (8) are slidably connected to the assembly ring (9) through the plurality of connection holes (19).

5. The downhole drainage choke according to claim 4, characterized in that: The outer surface of the connecting sleeve (7) is fixedly connected with a rotating ring (20), the outer surface of the connecting pipe (6) is provided with a rotating groove (21), and the rotating ring (20) is rotatably connected to the connecting pipe (6) through the rotating groove (21).

6. The downhole drainage choke according to claim 5, characterized in that: A clamping slot (22) is provided on the bottom surface of each assembly plate (12), and a plurality of clamping plates (15) are respectively clamped with a plurality of assembly plates (12) through the clamping slots (22).

7. The downhole drainage choke according to claim 6, characterized in that: A positioning hole (23) is provided on the inner wall of the assembly groove (11), and a positioning pin (24) is fixedly connected to one side of the assembly plate (12). The positioning pin (24) is slidably connected to the assembly ring (9) through the positioning hole (23).

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