CN219670436U - Filtering device for high-pressure end in natural gas exploitation process - Google Patents

Abstract

The utility model relates to the field of natural gas exploitation, in particular to a filtering device for a high-pressure end in a natural gas exploitation process, which comprises a device body, wherein the device body is provided with a filtering cavity, the filtering cavity comprises a cavity top, the cavity top is provided with an air inlet and an air outlet, a filtering component is arranged in the filtering cavity and is positioned between the air inlet and the air outlet, and the filtering component divides the filtering cavity into a pre-filtering area and a post-filtering area; the filtering device for the high-pressure end in the natural gas exploitation process is suitable for high-pressure and high-yield gas wells in natural gas exploitation, particularly gas wells subjected to reservoir acidification and yarn feeding fracturing reconstruction construction, liquid and solid impurities in natural gas are separated through the natural gas filtering device at the front end of a process, and the harm of the liquid and solid impurities to equipment and pipelines at the rear end of the process is reduced, so that fire and explosion caused by leakage of the natural gas are avoided.

Description

Filtering device for high-pressure end in natural gas exploitation process

Technical Field

The utility model relates to the field of natural gas exploitation, in particular to a filtering device for a high-pressure end in a natural gas exploitation process.

Background

The separators used in the existing natural gas exploitation process include vertical, horizontal, cyclone separators, filtering separators and the like, and in the natural gas exploitation process, the separators are required to be used for settling and separating liquid and solid impurities associated with the natural gas exploitation process, so that the impurities are prevented from impacting a pipeline along with the natural gas flow, and the damage to equipment and pipelines is avoided.

But most of separators used at present are arranged at the low-pressure end after heat preservation and throttling, and cannot be suitable for separating liquid and solid impurities in the high-pressure end, so that in the natural gas collection process, high-pressure end equipment moves along with natural gas in a pipeline due to impurities, equipment and the pipeline are impacted, the failure occurrence rate of the equipment and the pipeline at the high-pressure end is high, and the current separators cannot be directly used at the high-pressure end.

Therefore, a technical scheme is needed at present to solve the technical problem that the separation equipment used in the current natural gas collection is not suitable for the high-pressure end of the natural gas collection process.

Disclosure of Invention

The utility model aims at: aiming at the technical problem that the separation equipment used for natural gas collection is not suitable for the high-pressure end of the natural gas collection process, the filter device for the high-pressure end of the natural gas exploitation process is provided.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a filter equipment for natural gas exploitation process high pressure end, including the device body, the device body sets up the filter chamber, the filter chamber includes the chamber top, the chamber top sets up air inlet and gas outlet, set up filter element in the filter chamber, filter element is located the air inlet with between the gas outlet, filter element will the filter chamber is divided into before filtering region and filtration back region.

According to the filtering device for the high-pressure end in the natural gas extraction process, the filtering cavity is arranged on the device body, the air inlet and the air outlet are arranged on the top of the cavity of the filtering cavity, the filtering component is arranged between the air inlet and the air outlet in the filtering cavity, so that natural gas enters the filtering cavity from the air inlet of the filtering cavity, liquid and solid impurities in the natural gas are separated from the natural gas under the combined action of gravity and the filtering component, the solid impurities and the liquid stay at the bottom of the filtering cavity, and the purified natural gas is discharged from the air outlet at the top of the filtering cavity, so that the natural gas is filtered; the device body is arranged as a pressure bearing piece, so that the filtering device can be applied to a high-pressure end of a natural gas collection flow, and damage of impurities to the high-pressure end device is reduced.

As a preferable scheme of the utility model, the device body is provided with an air inlet pipe communicated with the air inlet, the device body is provided with a communication pipe communicated with the air outlet, and the air inlet pipe is provided with a throttle valve. The device body is connected with a gas production pipe of natural gas by arranging a gas inlet pipe and a communication pipe on the device body; through setting up the choke valve in the intake pipe, through adjusting the choke valve, can be to filter chamber pressure regulating and the flow size of the natural gas of control entering filter chamber.

As a preferable scheme of the utility model, the filter cavity comprises a cavity bottom, and a recoil protection device is arranged at the cavity bottom corresponding to the air inlet. By arranging the backflushing protection device, natural gas and impurities enter the filter cavity and then impact on the filtering backflushing device, the backflushing device is positioned at the bottom of the filter cavity, a conical flat plate is arranged at the upper part of the backflushing device, and the conical flat plate is positioned under the air inlet, so that the purpose of reducing erosion of the impurities in the natural gas to the bottom of the storage is achieved.

As a preferred aspect of the present utility model, the filter assembly includes a filter plate connected to an inner wall of the filter chamber, the filter plate having a shape adapted to a cross-sectional shape of the filter chamber, the filter plate being configured to: the plate-shaped structure is connected with the cavity bottom, and the mesh-shaped structure is connected with the cavity top. The filter plate is structured to have a mesh structure at the upper part and a plate-like structure at the lower part, and the plate-like structural member forms a groove structure at the bottom of the area before filtration, so that the reserved impurities are stored in the groove structure, and natural gas enters the area after filtration through the mesh structure at the top and is discharged out of the filter cavity from the gas outlet at the top of the cavity.

As a preferable mode of the utility model, the device body is provided with a first pressure gauge and a second pressure gauge, the first pressure gauge is communicated with the pre-filtration area, and the second pressure gauge is communicated with the post-filtration area. By arranging the first pressure gauge and the second pressure gauge to be respectively communicated with the pre-filtration area and the post-filtration area, whether the filter assembly is blocked or not can be judged by the pressure difference between the pre-filtration area and the post-filtration area; the pressure gauge can also be used for observing the reading, and controlling the throttle valve to accurately regulate the pressure of the filter cavity.

As a preferable mode of the utility model, the air inlet pipe is provided with a first control valve, the communication pipe is provided with a second control valve, and the first control valve is positioned between the device body and the throttle valve. Through set up the control valve respectively in communication pipe and intake pipe, make the filter chamber can cut off completely with the connection of natural gas network management, easily clear up the maintenance to the filter chamber inside, natural gas leakage when avoiding maintaining.

As a preferable mode of the utility model, the air inlet pipe is provided with a downstream pipeline between the throttle valve and the first control valve, the downstream pipeline is communicated with the air inlet pipe, the communication pipe is communicated with the downstream pipeline, one end of the second control valve is communicated with the filter cavity, the other end of the second control valve is communicated with the downstream pipeline, the downstream pipeline is provided with a third control valve, and the third control valve is positioned between the air inlet pipe and the communication pipe. One end of a second control valve on the communication pipe is communicated with the filter cavity, and the other end of the second control valve is communicated with the downstream pipeline; when the filter cavity is required to be cleaned, inspected and maintained, only the first control valve is required to be closed, the second control valve is required to be closed, and natural gas flows to the downstream through the third control valve and the fourth control valve, so that the smoothness of a natural gas flow passage is ensured, and the safety of personnel and equipment is ensured.

As a preferable mode of the utility model, the downstream pipeline is provided with a third pressure gauge and a fourth control valve, the third pressure gauge is arranged between the third control valve and the fourth control valve, and the communication pipe is communicated with the downstream pipeline between the third control valve and the fourth control valve. The fourth control valve is arranged to control the connection between the shut-off device and the downstream pipeline, and the third pressure gauge is arranged, so that the pressure in the downstream pipeline can be directly observed, an operator can conveniently judge the pressure condition in the pipeline, and the site safety is ensured.

As a preferable mode of the utility model, the device body is provided with a drain pipe which is communicated with the pre-filtration area, and the drain pipe is provided with at least one drain valve. The drain valve is arranged at the bottom of the cavity of the area before filtration, and liquid and smaller solid impurities can be discharged by opening the drain valve.

As a preferable mode of the utility model, the device body is provided with a vent valve and a safety valve, and the vent valve and the safety valve are communicated with the cavity top. By arranging the vent valve, natural gas in the filter cavity is discharged when the filter cavity is cleaned, inspected and maintained, so that pressurized operation is avoided; the safety valve is arranged to ensure that the filter cavity works without overpressure, so that the pressure can be relieved in time when the filter cavity is overpressured, and the safety of operators is ensured.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. according to the filtering device for the high-pressure end in the natural gas extraction process, the filtering cavity is arranged on the device body, the air inlet and the air outlet are arranged on the top of the cavity of the filtering cavity, the filtering component is arranged between the air inlet and the air outlet in the filtering cavity, so that natural gas enters the filtering cavity from the air inlet of the filtering cavity, liquid and solid impurities in the natural gas are separated from the natural gas under the combined action of gravity and the filtering component, the solid impurities and the liquid stay at the bottom of the filtering cavity, and the purified natural gas is discharged from the air outlet at the top of the filtering cavity, so that the natural gas is filtered; the device body is provided with the pressure bearing piece, so that the filtering device can be applied to the high-pressure end of the natural gas collection flow, and the damage of impurities to the high-pressure end device is reduced;

2. the filtering device for the high-pressure end in the natural gas exploitation process is suitable for high-pressure and high-yield gas wells in natural gas exploitation, particularly gas wells subjected to reservoir acidification and yarn feeding fracturing reconstruction construction, liquid and solid impurities in natural gas are separated through the natural gas filtering device at the front end of a process, and the harm of the liquid and solid impurities to equipment and pipelines at the rear end of the process is reduced, so that fire and explosion caused by leakage of the natural gas are avoided, and the filtering device has good economic value and practical value.

Drawings

FIG. 1 is a schematic diagram of a filtration device for the high pressure side of a natural gas recovery process;

fig. 2 is a schematic structural view of a filtering apparatus for a high-pressure side of a natural gas extraction process according to embodiment 2.

Icon:

the device comprises a device body, a 2-filter cavity, a 3-filter assembly, a 4-air inlet pipe, a 5-communication pipe, a 6-throttle valve, a 7-backflushing protection device, a 9-downstream pipeline, a 10-sewage pipeline, an 11-sewage valve, a 12-safety valve, a 13-emptying valve, a 14-blind flange, a 81-first control valve, a 82-second control valve, a 83-third control valve, a 84-fourth control valve, a 151-first pressure gauge, a 152-second pressure gauge and a 153-third pressure gauge.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

The utility model provides a filter equipment for natural gas extraction process high pressure end, includes device body 1, device body 1 sets up filter chamber 2, filter chamber 2 includes the chamber top, the chamber top sets up air inlet and gas outlet, set up filter component 3 in the filter chamber 2, filter component 3 is located the air inlet with between the gas outlet, filter component 3 will filter chamber 2 is divided into and is filtered front region and filtration back region.

Specifically, the device body 1 is configured as a hollow cylindrical structural member, the two ends of the cylindrical structural member are sealed by using blind flanges 14, the blind flanges 14 are detachably connected with the cylindrical structural member, the cylindrical structural member and the blind flanges 14 arranged at the two ends of the cylindrical structural member form a columnar filter cavity 2, and the device body 1 is made of a high-strength bearing material.

Specifically, an air inlet is formed in the top of the filter cavity 2, an air inlet pipe 4 is connected to the device body 1, the air inlet pipe 4 is communicated with the air inlet, a throttle valve 6 and a first control valve 81 are sequentially arranged on the air inlet pipe 4 along the natural gas flow direction in the air inlet pipe 4, and natural gas can sequentially enter the filter cavity 2 through the throttle valve 6, the first control valve 81 and the air inlet; an air outlet is formed in the top of the filter cavity 2, a communication pipe 4 is connected to the device body 1, the communication pipe 4 is communicated with the air outlet, and a second control valve 82 is arranged on the communication pipe 4.

Specifically, a filter assembly 3 is arranged in the filter cavity 2, the filter assembly 3 is positioned between the air inlet and the air outlet, the filter assembly 3 is a filter plate, the top of the filter plate is constructed into a net structure, the net structure is connected with the cavity top of the filter cavity 2, the bottom of the filter cavity 2 is constructed into a plate structure, and the plate structure is connected with the cavity bottom of the filter cavity 2; the filter plate is a circular structural member which is matched with the section of the filter cavity 2, and the circular structural member enables the filter cavity 2 to be divided into a pre-filter area and a post-filter area.

Specifically, the cavity bottom corresponding to the air inlet is provided with the backflushing protection device 7, the backflushing protection device 7 is a flat plate with a cone arranged on the upper part, and the cone is positioned right below the air inlet, so that the purpose of reducing erosion of impurities in natural gas to the bottom of the storage is achieved.

Specifically, a downstream pipe 9 is arranged between the throttle valve 6 and the first control valve 81 of the air inlet pipe 4, the downstream pipe 9 is communicated with a communication pipe, and a third control valve 83 is arranged at a position between the air inlet pipe 4 and the communication pipe of the downstream pipe 9; the third control valve 83 is in a normally open state, and the natural gas passes through the throttle valve 6 and then has two channels, namely a first channel: natural gas directly enters a downstream pipeline 9 to a fourth control valve 84 through a throttle valve 6 to a third control valve 83 and flows downstream; a second channel: the natural gas passes through the throttle valve 6, the first control valve 81, the filter cavity 2 and the second control valve 82 in sequence, and enters the downstream pipeline 9 after being filtered.

Specifically, the device body 1 is connected with a sewage drain pipe 10, the sewage drain pipe 10 is communicated with the cavity bottom where the area before filtration is located, and two sewage drain valves 11 are arranged on the sewage drain pipe 10; the device body 1 is provided with a vent valve 13 and a safety valve 12, and the vent valve 13 and the safety valve 12 are communicated with the cavity top where the pre-filtration area is located.

Specifically, the device body 1 is provided with a first pressure gauge 151 and a second pressure gauge 152, the first pressure gauge 151 is communicated with the area before filtration, and the second pressure gauge 152 is communicated with the area after filtration; the downstream pipeline 9 is provided with a third pressure gauge 153 and a fourth control valve 84, the fourth control valve 84 is arranged downstream of the third control valve 83, and the third pressure gauge 153 is arranged between the third control valve 83 and the fourth control valve 84; through setting up the manometer meter, make operating personnel can judge the condition of filter equipment's inside and the pressure of low reaches pipeline directly perceivedly, guarantee safety.

Preferably, the throttle valve 6 is a sleeve type spool throttle valve of chinese patent CN218564424U (ZL 202222321025.4).

The filtering device for the high-pressure end in the natural gas exploitation process is suitable for the design of high-pressure and high-yield gas wells in natural gas exploitation, and particularly for the gas wells subjected to reservoir acidification and yarn-adding fracturing modification construction, the impurities in the natural gas can be separated and removed at the front end of the process, so that the harm of the mixed liquid and solid impurities in the natural gas to process equipment and pipelines is reduced; the risk of natural gas leakage is reduced, and fire and explosion are avoided.

Example 2

A filtering apparatus for a high-pressure side of a natural gas extraction process as shown in fig. 2 has substantially the same structure as that of embodiment 1, except that the downstream pipe 9 is disposed downstream of the communication pipe 5, and the downstream pipe 9 communicates only with the communication pipe 5.

Specifically, the downstream pipe 9 is not provided with the third control valve 83.

Specifically, baffle plates are arranged at two ends of the cylindrical structural member, and the baffle plates are welded with the cylindrical structural member.

Preferably, the baffle and the cylindrical structural member are integrally formed.

Specifically, the bottom of device body 1 sets up and link up the opening of filter chamber 2, the nested filter that sets up in the opening makes the filter be connected with device body 1 can dismantle, and the bottom of filter sets up protruding structure, makes operating personnel easily hold protruding structure, is convenient for filter change.

Specifically, the drain valve 11 is provided as one.

Example 3

The structure of the filtering device for the high-pressure end in the natural gas extraction process is substantially the same as that of the embodiment 1, and is different from the embodiment 1 in that the communication pipe 5 and the device body 1 are integrally formed structural members, and the air inlet pipe 4 and the device body 1 are integrally formed structural members.

Example 4

The structure of a filtering device for the high-pressure end of the natural gas extraction process of the present embodiment is substantially the same as that of embodiment 1, except that the filtering chamber 2 is configured as a prismatic cavity.

In some embodiments, the filter cavity 2 is also configured as an irregularly shaped cavity.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A filter equipment for natural gas exploitation process high pressure end, its characterized in that, including device body (1), device body (1) sets up filter chamber (2), filter chamber (2) are including the chamber top, the chamber top sets up air inlet and gas outlet, set up filter component (3) in filter chamber (2), filter component (3) are located the air inlet with between the gas outlet, filter component (3) will filter chamber (2) are regional before filtering and are filtered back region.

2. A filtering device for a high-pressure end of a natural gas extraction process according to claim 1, wherein the device body (1) is provided with an air inlet pipe (4) communicated with the air inlet, the device body (1) is provided with a communication pipe (5) communicated with the air outlet, and the air inlet pipe (4) is provided with a throttle valve (6).

3. A filter device for a high pressure end of a natural gas extraction process according to claim 1, characterized in that the filter chamber (2) comprises a chamber bottom, and that the chamber bottom corresponding to the gas inlet is provided with a backflushing protection device (7).

4. A filter device for a high pressure end of a natural gas extraction process according to claim 3, characterized in that the filter assembly (3) comprises a filter plate connected to the inner wall of the filter chamber (2), the filter plate being adapted in shape to the cross-sectional shape of the filter chamber (2), the filter plate being configured to: the plate-shaped structure is connected with the cavity bottom, and the mesh-shaped structure is connected with the cavity top.

5. A filtering device for the high-pressure end of a natural gas extraction process according to claim 1, characterized in that the device body (1) is provided with a first pressure gauge (151) and a second pressure gauge (152), the first pressure gauge (151) being in communication with the pre-filtering zone and the second pressure gauge (152) being in communication with the post-filtering zone.

6. A filter device for a high-pressure end of a natural gas extraction process according to claim 2, characterized in that the gas inlet pipe (4) is provided with a first control valve (81), the communication pipe (5) is provided with a second control valve (82), and the first control valve (81) is positioned between the device body (1) and the throttle valve (6).

7. A filter device for a high pressure side of a natural gas extraction process according to claim 6, characterized in that the inlet pipe (4) is provided with a downstream pipe (9) between the throttle valve (6) and the first control valve (81), the downstream pipe (9) is in communication with the inlet pipe (4), the communication pipe (5) is in communication with the downstream pipe (9), one end of the second control valve (82) is in communication with the filter chamber (2), the other end is in communication with the downstream pipe (9), the downstream pipe (9) is provided with a third control valve (83), and the third control valve (83) is located between the inlet pipe (4) and the communication pipe (5).

8. A filtering device for the high-pressure side of a natural gas extraction process according to claim 7, characterized in that the downstream pipe (9) is provided with a third pressure gauge (153) and a fourth control valve (84), the third pressure gauge (153) is provided between the third control valve (83) and the fourth control valve (84), and the communication pipe (5) is communicated with the downstream pipe (9) between the third control valve (83) and the fourth control valve (84).

9. A filter device for a high pressure side of a natural gas extraction process according to claim 1, characterized in that the device body (1) is provided with a blow-down pipe (10), the blow-down pipe (10) is in communication with the pre-filtration zone, and that the blow-down pipe (10) is provided with at least one blow-down valve (11).

10. A filter device for a high pressure end of a natural gas extraction process according to claim 1, characterized in that the device body (1) is provided with a vent valve (13) and a safety valve (12), both the vent valve (13) and the safety valve (12) being in communication with the roof.