Two-phase flow reverse resistance device

Abstract

A main body structure is in a hollow tube shape, two ends of the main body are fixedly connected with butt welding flanges respectively, a sealing ball sheath is sleeved in the main body, a sealing ball sheath structure is in a hollow tube shape, one end of the sealing ball sheath is connected with an upper pressing plate in a clamping mode, a sealing ball is embedded in the upper pressing plate, and a groove is formed in the end face of the other end of the sealing ball sheath. A pressure spring seat is sleeved in the groove, a pressure spring seat fixing pressing plate is clamped on the end face, and a sheath pressing plate is sleeved between the pressure spring seat fixing pressing plate and the welding neck flange. The device has the beneficial effects that only one-way flow of fluid is allowed, the fluid which is discharged into a ground pipeline from a pumping drainage gas recovery well can be effectively prevented from flowing back into the well, and repeated work of a pumping unit is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical pumping and drainage devices and relates to a two-phase flow reverse resistance device. Background Art

[0002] As the formation pressure decreases and the formation energy weakens, the number of self-gassing wells decreases, resulting in an increasing workload for mechanical pumping and drainage wells and personnel maintenance. According to statistics, only 12% of the self-flowing wells converted to mechanical pumping and drainage wells can achieve casing self-flowing production, and 88% of the converted pumping wells cannot achieve self-flowing production, and need to manually open and close the casing gas valve for intermittent production. As the number of wells for mechanical pumping and drainage gas production continues to increase, due to the long distance between the wells and the rapid changes in the production dynamics of the gas wells in the block, the timing of releasing the casing gas is not fixed, which leads to the situation that the manual opening and closing of the casing valve is inevitably delayed, affecting the pump efficiency of the mechanical pumping and drainage gas production wells. When the casing pressure of the mechanical pumping and drainage gas production well is too high, if the casing pressure is not released in time, the "gas lock" phenomenon may occur, affecting the normal production of the mechanical pumping and drainage gas production well. Since the manual opening and closing of the casing valve is inevitably delayed, the fluid discharged from the surface pipeline of the mechanical pumping and drainage gas production well will flow back into the well, causing the piston to do repeated work and reducing work efficiency. In summary, the prior art has the problem that manual opening and closing of the casing valve is not timely and the liquid refluxes and performs repeated work. Summary of the invention

[0003] The purpose of the present invention is to provide a two-phase flow reverse resistance device, which solves the problems in the prior art that the switch valve needs to be manually operated and the liquid refluxes repeatedly to do work.

[0004] The technical solution adopted by the present invention is a two-phase flow reverse resistance device, the main body structure is a hollow tube, the two ends of the main body are respectively fixed with butt-welding flanges, a sealing ball sleeve is sleeved inside the main body, the sealing ball sleeve structure is a hollow tube, one end of the sealing ball sleeve is clamped with the upper pressure plate, a sealing ball is embedded in the upper pressure plate, a groove is opened on the inner wall of the other end of the sealing ball sleeve, a compression spring seat is sleeved in the groove, and a compression spring seat fixing pressure plate is clamped on the end face, and a sleeve pressure plate is sleeved between the compression spring seat fixing pressure plate and the butt-welding flange.

[0005] The present invention is also characterized in that the upper pressing plate is in a hollow tubular structure, the outer surface of the upper pressing plate is in contact with the inner surface of the main body, and one end of the upper pressing plate is in contact with the sealing seat.

[0006] The present invention is also characterized in that the sealing seat structure is hollow tubular, the outer surface of the sealing seat is closely fitted with the inner wall of the main body, a groove is opened on the inner surface of the main body, and an O-ring is embedded between the groove and the outer surface of the sealing seat.

[0007] The present invention is also characterized in that the sealing ball structure is spherical, one side of the sealing ball is partially embedded in a port at one end of the sealing seat, and the other side opposite thereto is fitted with a sealing ball supporting plate.

[0008] The present invention is also characterized in that the sealing ball supporting plate is cylindrical in structure, one end surface of the sealing ball supporting plate is provided with a semicircular groove in which the sealing ball is embedded, and the other end surface is provided with a groove.

[0009] The present invention is also characterized in that the compression spring seat is cylindrical in structure, has a circular hole axially opened in the compression spring seat, has a groove opened on one end surface of the compression spring seat, and a compression spring is abutted between the groove on the compression spring seat and the groove on the sealing ball.

[0010] The present invention is also characterized in that: the compression spring seat fixing plate structure is hollow tubular, one end of the compression spring seat fixing plate is tightly fitted with the compression spring seat, and the other end is clamped with the butt welding flange, and the outer surface of the compression spring seat fixing plate is fitted with the inner wall of the main body.

[0011] The present invention is also characterized in that a sealing gasket is arranged between the main body and the butt-welding flange.

[0012] The beneficial effects of the present invention are that the device only allows one-way flow of fluid, which can effectively prevent the fluid that has been discharged into the ground pipeline from the mechanically pumped drainage gas well from flowing back into the well, thereby reducing the repeated work of the pumping unit; the casing valve can be automatically switched according to the front-end pressure, thereby reducing the number of operations of the mechanically pumped drainage well by on-site personnel and reducing the labor intensity of the personnel on the job; the timely release of casing gas is beneficial to the drainage of the oil pipe, making the filling coefficient of the underground pump higher, improving the pump efficiency and reducing energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of a two-phase flow reverse resistance device;

[0014] In the figure, 1, butt welding flange; 2, sealing gasket; 3, main body; 4, O-ring; 5, sealing seat; 6, upper pressure plate; 7, sealing ball; 8, sealing ball support plate; 9, sealing ball sleeve; 10, compression spring; 11, compression spring seat; 12, compression spring seat fixing pressure plate; 13, sleeve pressure plate. DETAILED DESCRIPTION

[0015] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1 As shown, the present invention mainly includes a butt-weld flange 1 and a main body 3, and the main body 3 is a hollow tube structure. The bottoms of the two butt-weld flanges are welded to the two ends of the main body 3 respectively. The top of the butt-weld flange 1 is welded to the pipeline. The sealing gasket 2 is nested between the butt-weld flange 1 and the main body 3, and fits tightly with the two to prevent fluid leakage during use.

[0017] The main body 3 is provided with an O-ring 4, a sealing seat 5, an upper pressure plate 6, a sealing ball 7, a sealing ball supporting plate 8, a sealing ball sleeve 9, a compression spring 10, a compression spring seat 11, a compression spring seat fixing pressure plate 12, and a sleeve pressure plate 13. The outer surface of the O-ring 4 is tightly fitted with the main body 3, and the inner surface of the O-ring 4 is tightly fitted with the sealing seat 5. It is used for sealing between the main body 3 and the sealing seat 5.

[0018] The sealing seat 5 is in a hollow tubular structure, and the outer surface and one end face of the sealing seat 5 are tightly fitted with the inner wall of the main body 3, and the other end face is in contact with the upper pressure plate 6. The inner surface of the upper pressure plate 6 is tightly fitted with the sealing ball 7. A part of the outer surface of the upper pressure plate 6 is tightly fitted with the inner wall of the main body 3, and a part is connected to one end face of the sealing ball sleeve 9 by threading. The sealing ball 7 is embedded with one end of the sealing ball support plate 8. The other end of the sealing ball support plate 8 is embedded with one end of the compression spring 10. The sealing ball 7 is tightly fitted with the sealing seat 5. The other end of the compression spring 10 is embedded with one end of the compression spring seat 11. The other end of the compression spring seat 11 is fitted with the compression spring seat fixed pressure plate 12. The sealing ball support plate 8, the compression spring 10, and the compression spring seat 11 are inside the sealing ball sleeve 9. One end of the compression spring seat fixed pressure plate 12 is connected to the other end face of the sealing ball sleeve 9 by threading. The other end of the compression spring seat fixed pressure plate 12 is fixedly connected to one end of the sleeve pressure plate 13. The other end of the sheath pressing plate 13 is connected to the main body 3 in a threaded manner. The outer surface of the sheath pressing plate 13 is tightly fitted to the inner wall of the main body 3.

[0019] The sealing ball 7 and the sealing seat 5 of the two-phase flow resistor can be made of ceramics, which have strong erosion and corrosion resistance and a longer service life than metal.

[0020] Before installing the two-phase flow reverse resistor at the designated position, a suitable compression spring 10 is selected and installed according to the production dynamics of the mechanical pumping drainage gas production well, so that the casing pressure release and the single well dynamics can be accurately combined.

[0021] The working principle of the two-phase flow resistance device is as follows: the top of the butt-welding flange 1 at both ends of the two-phase flow resistance device is welded to the pipeline. In the initial state, the sealing ball 7 is pushed by the compression spring 10 to fit tightly with the sealing seat 5, and the two-phase flow resistance device is in a closed state. When the inlet pressure is greater than the set spring pressure, the fluid pushes the sealing ball 7 to cause the compression spring 10 to be compressed, and the sealing ball 7 is separated from the sealing seat 5. The two-phase flow resistance device is in an open state, and the fluid in the pipeline can pass through the pipeline. When the inlet pressure is less than the set spring pressure, the fluid cannot push the sealing ball to compress the compression spring. The sealing ball fits tightly against the sealing ball seat, the two-phase flow resistance device is in a closed state, and the fluid in the pipeline cannot pass through the two-phase flow resistance device.

[0022] Example 1

[0023] like Figure 1As shown, this embodiment proposes a two-phase flow reverse resistance device, including a main body 3, the main body structure is a hollow tube, and the two ends of the main body 3 are respectively fixed with butt-welding flanges 1. A sealing ball sleeve 9 is sleeved in the main body 3. The sealing ball sleeve 9 has a hollow tube structure. One end of the sealing ball sleeve 9 is clamped with the upper pressure plate 6. A sealing ball 7 is embedded in the upper pressure plate 6. A groove is opened on the inner wall of the other end of the sealing ball sleeve 9, and a compression spring seat 11 is sleeved in the groove, and a compression spring seat fixing pressure plate 12 is clamped on the end face, and a sleeve pressure plate 13 is sleeved between the compression spring seat fixing pressure plate 12 and the butt-welding flange 1.

[0024] Example 2

[0025] like Figure 1 As shown, this embodiment proposes a two-phase flow reverse resistance device, including a main body 3, the main body structure is a hollow tube, and the two ends of the main body 3 are respectively fixed with butt-welding flanges 1. A sealing ball sleeve 9 is sleeved in the main body 3. The sealing ball sleeve 9 has a hollow tube structure. One end of the sealing ball sleeve 9 is clamped with the upper pressure plate 6. A sealing ball 7 is embedded in the upper pressure plate 6. A groove is opened on the inner wall of the other end of the sealing ball sleeve 9, and a compression spring seat 11 is sleeved in the groove, and a compression spring seat fixing pressure plate 12 is clamped on the end face, and a sleeve pressure plate 13 is sleeved between the compression spring seat fixing pressure plate 12 and the butt-welding flange 1.

[0026] The upper pressing plate 6 is in a hollow tubular structure, the outer surface of the upper pressing plate 6 is in contact with the inner surface of the main body 3, and one end of the upper pressing plate 6 is in contact with the sealing seat 5. The sealing seat 5 is in a hollow tubular structure, the outer surface of the sealing seat 5 is in close contact with the inner wall of the main body 3, a groove is provided on the inner surface of the main body 3, and an O-ring 4 is embedded between the groove and the outer surface of the sealing seat 5. The sealing ball 7 is in a spherical structure, one side of the sealing ball 7 is partially embedded in a port at one end of the sealing seat 5, and the other side opposite to it is in contact with the sealing ball support plate 8.

[0027] Example 3

[0028] like Figure 1 As shown, this embodiment proposes a two-phase flow reverse resistance device, including a main body 3, the main body structure is a hollow tube, and the two ends of the main body 3 are respectively fixed with butt-welding flanges 1. A sealing ball sleeve 9 is sleeved in the main body 3. The sealing ball sleeve 9 has a hollow tube structure. One end of the sealing ball sleeve 9 is clamped with the upper pressure plate 6. A sealing ball 7 is embedded in the upper pressure plate 6. A groove is opened on the inner wall of the other end of the sealing ball sleeve 9, and a compression spring seat 11 is sleeved in the groove, and a compression spring seat fixing pressure plate 12 is clamped on the end face, and a sleeve pressure plate 13 is sleeved between the compression spring seat fixing pressure plate 12 and the butt-welding flange 1.

[0029] The upper pressing plate 6 is in a hollow tubular structure, the outer surface of the upper pressing plate 6 is in contact with the inner surface of the main body 3, and one end of the upper pressing plate 6 is in contact with the sealing seat 5. The sealing seat 5 is in a hollow tubular structure, the outer surface of the sealing seat 5 is in close contact with the inner wall of the main body 3, a groove is provided on the inner surface of the main body 3, and an O-ring 4 is embedded between the groove and the outer surface of the sealing seat 5. The sealing ball 7 is in a spherical structure, one side of the sealing ball 7 is partially embedded in a port at one end of the sealing seat 5, and the other side opposite to it is in contact with the sealing ball support plate 8.

[0030] The sealing ball support plate 8 is cylindrical in structure, with a groove on one end face of the sealing ball support plate 8, in which the sealing ball 7 is embedded, and a groove on the other end face. The compression spring seat 11 is cylindrical in structure, with a circular hole axially opened in the compression spring seat 11, and a groove on one end face of the compression spring seat 11, and a compression spring 10 is abutted between the groove on the compression spring seat 11 and the groove on the sealing ball 7. The compression spring seat fixed pressure plate 12 is hollow and tubular in structure, with one end 12 of the compression spring seat fixed pressure plate tightly fitting with the compression spring seat 11, and the other end clamping with the butt-welding flange 1, and the outer surface of the compression spring seat fixed pressure plate 12 fits with the inner wall of the main body 3. A sealing gasket 2 is arranged between the main body 3 and the butt-welding flange.

Claims

1. Two-phase flow reverse resistance device, characterized in that: The invention comprises a main body (3), wherein the main body (3) has a hollow tubular structure, and the two ends of the main body (3) are respectively fixedly connected with a butt-welding flange (1), and the main body (3) is sleeved with a sealing ball sleeve (9), and the sealing ball sleeve (9) has a hollow tubular structure, and one end of the sealing ball sleeve (9) is clamped with an upper pressure plate (6), and a sealing ball (7) is embedded in the upper pressure plate (6), and the other end of the sealing ball sleeve (9) is grooved on the inner wall, and a compression spring seat (11) is sleeved in the groove, and a compression spring seat fixing pressure plate (12) is clamped on the end face, and a sleeve pressure plate (13) is sleeved between the compression spring seat fixing pressure plate (12) and the butt-welding flange (1).

2. The two-phase flow reverse resistance device according to claim 1, characterized in that: The upper pressing plate (6) has a hollow tubular structure, the outer surface of the upper pressing plate (6) is in contact with the inner surface of the main body (3), and one end of the upper pressing plate (6) is in contact with the sealing seat (5).

3. The two-phase flow reverse resistance device according to claim 2, characterized in that: The sealing seat (5) is in the shape of a hollow tube. The outer surface of the sealing seat (5) is tightly fitted with the inner wall of the main body (3). A groove is provided on the inner surface of the main body (3). An O-ring (4) is embedded between the groove and the outer surface of the sealing seat (5).

4. The two-phase flow reverse resistance device according to claim 3, characterized in that: The sealing ball (7) is spherical in structure, one side of the sealing ball (7) is partially embedded in a port at one end of the sealing seat (5), and the other side opposite thereto is in contact with the sealing ball support plate (8).

5. The two-phase flow reverse resistance device according to claim 4, characterized in that: The sealing ball support plate (8) has a cylindrical structure, one end surface of the sealing ball support plate (8) is provided with a groove in which the sealing ball (7) is embedded, and the other end surface is provided with a groove.

6. The two-phase flow reverse resistance device according to claim 5, characterized in that: The compression spring seat (11) is cylindrical in structure, has a circular hole axially opened in the compression spring seat (11), has a groove opened on one end surface of the compression spring seat (11), and a compression spring (10) is abutted between the groove on the compression spring seat (11) and the groove on the sealing ball (7).

7. The two-phase flow reverse resistance device according to claim 6, characterized in that: The structure of the compression spring seat fixing plate (12) is in the shape of a hollow tube. One end (12) of the compression spring seat fixing plate is tightly fitted with the compression spring seat (11), and the other end is clamped with the butt welding flange (1). The outer surface of the compression spring seat fixing plate (12) is fitted with the inner wall of the main body (3).

8. The two-phase flow reverse resistance device according to claim 7, characterized in that: A sealing gasket (2) is provided between the main body (3) and the butt-welding flange.

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