Gas recovery device

Abstract

The utility model discloses a casing gas recovery device, comprising a main body, an outer sleeve being provided on the outer side of the main body, a casing gas exhaust port being provided on the main body corresponding to the outer sleeve, an air inlet pipe joint and a pressure regulating cock being provided at two ends of the main body respectively, an oil-repellent joint being provided at two sides of the outer sleeve respectively, a valve ball, a valve ball support body and a spring being provided at the middle part of the main body, the valve ball support body and the valve ball being provided at one end of the spring close to the air inlet pipe joint, the utility model is suitable for oil wells with high casing gas, and is installed at a suitable position of the oil casing connecting pipe at the oil production wellhead, and is used for automatically controlling the casing gas accumulated in the annular space of the casing downhole, and when the pressure in the annular space of the casing exceeds the allowable value, the casing gas can be automatically discharged and recovered, and the recovered casing gas enters the ground oil pipeline, and has a driving effect on the flow of crude oil in the ground pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary parts of oil well pumps, in particular to a casing gas recovery device. Background Art

[0002] During the oil pumping process, the oil well pump will produce casing gas. The casing gas will gradually move upward through the pipeline and affect the flow of crude oil in the pipeline. Therefore, a casing gas recovery device is needed to prevent the casing gas from affecting the flow of crude oil in the pipeline. Utility Model Content

[0003] The purpose of the utility model is to provide a casing gas recovery device to solve the problem raised in the above background technology that casing gas is generated during the oil pumping process in the existing oil well pumping pump, and the casing gas gradually moves upward through the pipeline and affects the flow of crude oil in the pipeline.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a casing gas recovery device, comprising a main body, an outer sleeve provided on the outer side of the main body, a casing gas exhaust port provided on the main body corresponding to the outer sleeve, an air intake pipe joint and a pressure regulating cock provided at both ends of the main body, an oil-repellent joint provided on both sides of the outer sleeve, a valve ball, a valve ball support and a spring provided in the middle of the main body, and the valve ball support and the valve ball are provided at one end of the spring close to the air intake pipe joint.

[0005] Furthermore, the outer end of the oil-pin joint is connected to the oil-pin annular surface sealing joint through an oil-pin nut.

[0006] Furthermore, one of the oil-non-iron joints is connected to the outer casing through a pipe joint and an elbow.

[0007] Furthermore, the air intake pipe joint is connected to the main body through a connecting joint, a first sealing gasket is provided between the connecting joint and the main body, the connecting joint is fixedly connected to the air intake pipe joint through a tightening nut, and a second sealing gasket is provided between the connecting joint and the air intake pipe joint.

[0008] Furthermore, a sealing ring is provided between the pressure regulating cock and the main body.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model is suitable for oil wells with high casing gas. It is installed at a suitable position of the oil-casing connecting pipe at the oil wellhead and is used to automatically control the casing gas accumulated in the annular space of the casing downhole. When the pressure in the annular space of the casing exceeds the allowable value, the casing gas can be automatically discharged and recovered. The recovered casing gas enters the ground oil pipeline, which has a promoting effect on the flow of crude oil in the ground pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the gas flow in the utility model.

[0013] In the above drawings, 1. Main body; 2. Pressure regulating plug; 3. Outer sleeve; 4. Sealing ring; 5. Spring; 6. Pipe joint; 7. Elbow; 8-1. Oil-repellent joint; 9. Oil-repellent nut; 10. Oil-repellent annular sealing joint; 11. Valve ball support; 12. Valve ball; 13. Sealing gasket; 14. Connecting joint; 15. Pressing nut; 16. Sealing gasket; 17. Inlet pipe joint. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0015] like Figure 1-2 As shown, it includes a main body 1, a jacket 3 is provided on the outer side of the main body 1, and a jacket air exhaust port is provided on the main body 1 corresponding to the jacket 3. The jacket air exhaust port is arranged in the cavity between the main body 1 and the jacket 3. The two ends of the jacket 3 main body 1 are respectively provided with an air intake pipe joint 17 and a pressure regulating cock 2. The outer end of the air intake pipe joint 17 is the air intake port, and an oil-resistance joint 8-1 is provided on both sides of the jacket 3. The jacket air in the main body 1 is discharged and recovered from the oil-resistance joint 8-1. The discharge process of the jacket air is mainly controlled by the valve ball 12 in the main body 1. Specifically, the middle part of the main body 1 is provided with a valve ball 12, a valve ball support body 11 and a spring 5. The valve ball support body 11 and the valve ball 12 are arranged at one end of the spring 5 close to the air intake pipe joint 17. Through the air intake pipe joint 17, the connection When the casing air of the joint 14 does not exceed the allowable pressure value, the valve ball 12 and the valve ball support body 11 block the casing air exhaust port. When the casing air through the intake pipe joint 17 and the connecting joint 14 exceeds the allowable pressure value, the pressure pushes up the valve ball 12, the valve ball support body 11, and the spring 5 to bounce the casing air toward the pressure-regulating plug 2, and the casing air enters the main body 1 through the casing air exhaust port and enters the cavity formed by the main body 1 and the outer sleeve 3, and then is discharged to the air outlet pipe through the oil-non-iron joint 8-1 and the oil-non-iron annular sealing joint 10. The pressure-regulating plug 2 can adjust the air pressure valve value in the main body 1. Specifically, the pressure-regulating plug 2 is adjusted downward to increase the pressure of the spring 5, so that the inlet pressure required for the spring 5 to bounce up is increased, thereby controlling the inlet pressure, and the pressure-regulating plug 2 and the main body 1 are sealed by the sealing ring 4.

[0016] The outer end of the oil-non-iron joint 8-1 is connected to the oil-non-iron ring surface sealing joint 10 through the oil-non-iron nut 9. The oil-non-iron nut 9 is the connecting structure of the oil-non-iron ring surface sealing joint 10, and the oil-non-iron ring surface sealing joint 10 is connected to the air outlet pipe.

[0017] One of the oil-net joints 8 - 1 is connected to the outer casing 3 through a pipe joint 6 and an elbow 7 , and the elbow 7 realizes the steering of the oil-net joint 8 - 1 to adapt to the connection requirements of different outlet pipes.

[0018] The connecting joint 14 and the tightening nut 15 are the connection structures between the connecting joint 14, the main body 1 and the intake pipe joint 17. A first sealing gasket 13 is provided between the connecting joint 14 and the main body 1, and a second sealing gasket 16 is provided between the connecting joint 14 and the intake pipe joint 17. The first sealing gasket 13 and the second sealing gasket 16 realize the sealed connection between the connecting joint 14, the main body 1 and the intake pipe joint 17.

[0019] This utility model is installed at a suitable location on the oil-casing connection pipe at the wellhead. When the casing gas accumulated through the intake pipe joint 17, compression nut 15, and connecting joint 14 exceeds the allowable pressure, the pressure pushes up the valve ball 12 and valve ball support 11, causing the spring 5 to spring. The casing gas enters the cavity formed by the main body 1 and outer sleeve 3 and is then discharged into the outlet pipe through the oil-silicon joint 8-1 and the oil-silicon annular seal joint 10. The pressure regulating cock 22 is adjusted downward to increase the pressure of the spring 5, thereby increasing the inlet pressure. In actual use, the inlet pressure is controlled within a range of 1-5 MPa.

Claims

1. A jacket gas recovery device, characterized in that: It includes a main body, an outer sleeve is provided on the outer side of the main body, a sleeve air exhaust port is provided on the main body corresponding to the outer sleeve, an air inlet pipe joint and a pressure regulating cock are provided at both ends of the main body, an oil-repellent joint is provided on both sides of the outer sleeve, a valve ball, a valve ball support and a spring are provided in the middle of the main body, and the valve ball support and the valve ball are provided at one end of the spring close to the air inlet pipe joint.

2. The jacket gas recovery device according to claim 1, characterized in that: The outer end of the oil-non-iron joint is connected to the oil-non-iron ring face sealing joint through an oil-non-iron nut.

3. The jacket gas recovery device according to claim 2, characterized in that: One of the oil-non-iron joints is connected to the outer casing through a pipe joint and an elbow.

4. The jacket gas recovery device according to claim 1, characterized in that: The air inlet pipe joint is connected to the main body through a connecting joint, a first sealing gasket is arranged between the connecting joint and the main body, the connecting joint is fixedly connected to the air inlet pipe joint through a compression nut, and a second sealing gasket is arranged between the connecting joint and the air inlet pipe joint.

5. The jacket gas recovery device according to claim 1, characterized in that: A sealing ring is arranged between the pressure regulating cock and the main body.

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