CN211201901U - A natural gas well drainage and gas recovery device - Google Patents

Abstract

The utility model discloses a natural gas well drainage and gas extraction device, comprising a natural gas well, a movable plug, a pressure pump, a support, a hydraulic cylinder, an exhaust pipe, a gas storage layer, a liquid level sensor and a one-way valve. The plug is provided with the movable plug, the bottom surfaces of the two sides of the movable plug are supported and installed with the brackets, the brackets are portal frames, and the hydraulic cylinders are fixedly installed at the bottom of the top frames of the portal frames. The bottom of the hydraulic cylinder is fixed on the top of the movable plug, the middle of the movable plug is also clamped with the exhaust pipe, the exhaust pipe is an L-shaped pipe, and one end of the exhaust pipe extends into the Inside the natural gas well, the other end is connected with a gas pipeline through a hose. The beneficial effects are: the natural gas well drainage and gas recovery device of the present utility model realizes the liquid drainage through the gas well pressurization and the liquid discharge pipe pressurization double-layer pressure, the liquid drainage effect is good, and the liquid level is measured reasonably to ensure the natural gas collection. Work.

Description

A natural gas well drainage and gas recovery device

technical field

The utility model relates to the field of oil and natural gas extraction devices, in particular to a drainage gas extraction device for natural gas wells.

Background technique

With the in-depth development of natural gas fields, the number of water-producing gas fields is increasing. In the initial stage of condensate accumulation in pure gas wells, when the formation pressure is relatively high, after the accumulation of fluid reaches a certain level, the gas well can carry out the accumulation of fluid by its own energy. In the late stage of production of gas wells, due to the decrease of formation pressure and gas well productivity, the temperature gradient of the wellbore increases. Due to the decrease of temperature, some components in the natural gas condense in the wellbore to form condensate, and the gas production of the gas well is not enough to bring out this part. When the condensate is formed, the condensate will fall back to the bottom of the well, resulting in wellbore fluid accumulation. The gas well fluid accumulation has a great impact on the exploitation of natural gas, and in severe cases, it prevents the natural gas well from being able to produce gas.

Utility model content

The purpose of the present utility model is to provide a natural gas well drainage gas production device in order to solve the above problems.

The utility model realizes the above-mentioned purpose through the following technical solutions:

A natural gas well drainage and gas production device, comprising a natural gas well, a movable plug, a pressure pump, a support, a hydraulic cylinder, an exhaust pipe, a gas storage layer, a liquid level sensor and a one-way valve, and the top plug of the natural gas well is provided with all the For the movable plug, the brackets are supported and installed on the bottom surfaces of both sides of the movable plug, the brackets are portal frames, and the hydraulic cylinders are fixedly installed at the bottom of the top frames of the portal frames. The bottom is fixed on the top of the movable plug, the middle of the movable plug is also clamped with the exhaust pipe, the exhaust pipe is an L-shaped pipe, and one end of the exhaust pipe extends into the natural gas well. Inside, the other end is connected with a gas pipeline through a hose, the bottom of the natural gas well is connected with the gas storage layer, and the gas storage layer is also connected with a drain pipe through the one-way valve. The top is communicated with the pressure pump fixed on the bottom.

In order to further improve the drainage performance of the natural gas well drainage and gas production device, the upper part of the natural gas well is a cylindrical well with a uniform cross-section, and the lower part is a conical well, so that when the movable plug moves up and down, a large pressure is generated on the air pressure in the well. .

In order to further improve the stability of the natural gas well drainage and gas production device, the part of the exhaust pipe that leaks out of the natural gas well is supported and installed with a telescopic shaft, and the top surface of the movable plug is provided with a convex part clamping groove, and the convex part clamps A convex part on the exhaust pipe is also clamped in the groove, and a screw sleeve is also screwed on the exhaust pipe to fasten the exhaust pipe.

In order to further improve the air tightness of the natural gas well drainage and gas production device, the bottom of the gas transmission pipe is installed through a gas pipe bracket, and a rubber ring is attached to the top of the spiral sleeve to enhance its air tightness.

In order to further improve the use performance of the natural gas well drainage and gas production device, the liquid level sensor is also installed on the layer wall of the gas storage layer to detect the depth of the accumulated water to facilitate reasonable drainage of the accumulated water. There is a gas valve, which is used to control the gas on and off.

In the above structure, the natural gas enters the natural gas well through its own air pressure and is discharged through the exhaust pipe. When the accumulated water reaches a certain depth and affects the exhaust, the hydraulic cylinder drives the moving plug to move down, increasing the air pressure, and the accumulated water at the bottom receives the pressure. The increased influence is discharged into the discharge pipe through the one-way valve, and the secondary pressurized discharge is carried out through the pressure pump.

The beneficial effects are: the natural gas well drainage and gas recovery device of the present utility model realizes liquid drainage through the gas well pressurization and the liquid discharge pipe pressurization double-layer pressure, the liquid drainage effect is good, and the liquid level is measured reasonably to ensure the natural gas collection. Work.

Description of drawings

Fig. 1 is the overall structure schematic diagram of a kind of natural gas well drainage gas production device according to the present utility model;

Fig. 2 is a schematic diagram of the clamping structure of the exhaust pipe of a natural gas well drainage gas production device according to the present invention.

The reference numerals are explained as follows:

1. Natural gas well; 2. Moving plug; 3. Pressure pump; 4. Bracket; 5. Hydraulic cylinder; 6. Hose; 7. Gas pipeline; 8. Tracheal bracket; 9. Telescopic shaft; 10. Spiral sleeve; 11 , exhaust pipe; 12, gas storage layer; 13, liquid level sensor; 14, one-way valve; 15, drain pipe; 16, air inlet;

Detailed ways

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

Below in conjunction with accompanying drawing, the utility model is further described:

The utility model provides a natural gas well drainage gas production device, the drainage gas production device comprises a natural gas well 1, a movable plug 2, a pressure pump 3, a support 4, a hydraulic cylinder 5, an exhaust pipe 11, a gas storage layer 12, a liquid Position sensor 13 and one-way valve 14;

1-2, the top plug of the natural gas well 1 is provided with a movable plug 2, and the bottom surfaces on both sides of the movable plug 2 are supported and installed with brackets 4, the brackets 4 are portal frames, and the bottom of the top frame of the portal frame is fixedly installed There is a hydraulic cylinder 5, the bottom of the hydraulic cylinder 5 is fixed on the top of the movable plug 2, and the middle of the movable plug 2 is also clamped with an exhaust pipe 11, the exhaust pipe 11 is an L-shaped pipe, and one end of the exhaust pipe 11 extends into the natural gas Inside the well 1, the other end is connected with a gas pipe 7 through a hose 6;

The bottom of the natural gas well 1 is connected with a gas storage layer 12, and the gas storage layer 12 is also connected with a liquid drain pipe 15 through a one-way valve 14, and the top of the liquid drain pipe 15 is connected with a pressure pump 3 fixed on the bottom surface.

In this embodiment, the upper part of the natural gas well 1 is a cylindrical well with a uniform cross section, and the lower part is a conical well, which is convenient for the movable plug 2 to move up and down to generate greater pressure on the gas pressure in the well.

In this embodiment, the part of the exhaust pipe 11 that leaks out of the natural gas well 1 is supported and installed with a telescopic shaft 9 , and the top surface of the movable plug 2 is provided with a convex groove, and the exhaust pipe 11 is also clamped in the convex groove. The convex part on the exhaust pipe 11 is also screwed with a screw sleeve 10 to fasten the exhaust pipe 11 .

In this embodiment, the bottom of the gas transmission pipe 7 is installed through the gas pipe bracket 8, and a rubber ring is attached to the top of the spiral sleeve 10 to enhance its air tightness.

In this embodiment, a liquid level sensor 13 is also installed on the layer wall of the gas storage layer 12 to detect the depth of the accumulated water to facilitate reasonable drainage of the accumulated water, and an air valve is provided on the exhaust pipe 11 to control the on-off of the gas .

In the above-mentioned structure, the natural gas enters the natural gas well through its own air pressure and is discharged through the exhaust pipe 11. When the accumulated water reaches a certain depth and affects the exhaust, the hydraulic cylinder 5 drives the moving plug 2 to move down, increasing the air pressure, and the bottom of the water accumulates. Affected by the increase in pressure, it is discharged into the drain pipe 15 through the one-way valve, and is discharged through the pressure pump 3 for secondary pressurization.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention There will also be various changes and improvements in the new model, which all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. the drainage and gas production device of the natural gas well is characterized by comprising the natural gas well, a movable plug, a pressure pump, a support, a hydraulic cylinder, an exhaust pipe, a gas storage layer, a liquid level sensor and a one-way valve, wherein the movable plug is arranged on the top of the natural gas well, the support is supported and installed on the bottom surfaces of two sides of the movable plug, the support is a door-shaped frame, the hydraulic cylinder is fixedly installed at the bottom of a top frame of the door-shaped frame, the bottom of the hydraulic cylinder is fixed to the top of the movable plug, the exhaust pipe is clamped in the middle of the movable plug and is an L-shaped pipe, one end of the exhaust pipe extends into the natural gas well, the other end of the exhaust pipe is connected with the gas pipe through a hose, the gas storage layer is communicated with the gas storage layer through the one-way valve, the gas storage layer is communicated with a liquid discharge pipe through the one-way valve.

2. The gas well drainage gas recovery device of claim 1 wherein: the upper part of the natural gas well is a cylindrical well with a uniform section, and the lower part of the natural gas well is a conical well, so that the movable plug can generate large pressure to the gas pressure in the well when moving up and down.

3. A natural gas well drainage gas recovery device as defined in claim 2 wherein: the exhaust pipe leaks the part of natural gas well and supports and install the telescopic shaft, the top surface of removal stopper has seted up the convex part draw-in groove, still joint in the convex part draw-in groove convex part on the exhaust pipe, it has the spiral shell to connect soon on the exhaust pipe to be used for right the exhaust pipe fastens.

4. A natural gas well drainage gas recovery device as defined in claim 3 wherein: the bottom of the gas transmission pipe is installed through a gas pipe support, and a rubber ring is attached to the top of the spiral sleeve and used for enhancing the gas tightness of the spiral sleeve.

5. The gas well drainage gas recovery device of claim 1 wherein: still install on the layer wall on gas storage layer level sensor is used for detecting the ponding degree of depth and is convenient for carry out reasonable ponding drainage, be provided with the pneumatic valve on the blast pipe for control gas break-make.

Images