CN213375556U

CN213375556U - Filter and process pipeline for natural gas exploitation

Info

Publication number: CN213375556U
Application number: CN202021983658.6U
Authority: CN
Inventors: 林涛; 韩玉坤; 鲁胜伟; 王红宾; 徐慧玲; 李维涛
Original assignee: China Petroleum and Chemical Corp; Sinopec Zhongyuan Oilfield Co Puguang Branch
Current assignee: China Petroleum and Chemical Corp; Sinopec Zhongyuan Oilfield Co Puguang Branch
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-06-08
Anticipated expiration: 2030-09-11

Abstract

The utility model relates to a filter and be used for natural gas exploitation's technology pipeline. The filter comprises a tubular main body, a filter screen supporting seat, a supporting seat supporting structure and a movable compression ring, wherein the tubular main body is used for being connected in series on a corresponding pipeline; the filter screen supporting seats are two, and fluid channels are formed in the filter screen supporting seats and extend along the axial direction of the tubular main body; one end of each filter screen supporting seat is provided with an inclined end face, and the inclined end faces of the two filter screen supporting seats are mutually parallel and are oppositely arranged along the axial direction of the tubular main body; the filter screen is obliquely arranged in the tubular main body relative to the axis of the tubular main body and is clamped between the oblique end surfaces of the two filter screen supporting seats; the supporting seat supporting structure is arranged in the tubular main body; the movable press ring is detachably connected in the tubular main body and used for jacking another filter screen supporting seat to simultaneously press the two filter screen supporting seats onto the supporting seat supporting structure. The filter can be installed on a small-caliber process pipeline in a narrow space, and the filtering effect is ensured.

Description

Filter and process pipeline for natural gas exploitation

Technical Field

The utility model relates to a filter and be used for natural gas exploitation's technology pipeline.

Background

In various production processes, in order to prevent impurities from blocking pipelines and influencing normal operation of the pipelines when certain process pipelines operate, the pipelines are required to be additionally provided with filters.

For example, in the natural gas extraction process, a pressure detection device is arranged on a process pipeline, some pressure detection devices are not convenient to directly install on a transmission pipeline of the natural gas extraction process pipeline, or some pressure detection devices need to be installed at a set position away from the transmission pipeline by a certain distance, and at the moment, the installation of the pressure detection devices needs to be realized through a pressure leading pipe. Specifically, one end of the pressure guiding pipe is communicated with the conveying pipeline, and the other end of the pressure guiding pipe is communicated with the pressure detection device, so that the natural gas at a certain position of the conveying pipeline is drained to the pressure detection device through the pressure guiding pipe, and the pressure detection of the natural gas in the conveying pipeline is realized. In order to avoid the blockage of the pressure guiding pipe by impurities in the natural gas, a filter needs to be additionally arranged on the pressure guiding pipe.

The filter among the prior art includes first casing, second casing and filters the otter board, filters the otter board periphery and is fixed with the sealing washer, and the sealing washer presss from both sides and pass through the bolt fastening between first casing and second casing, and first casing, the both ends that the second casing carried on the back mutually are connected with the pressure pipe respectively, and connect the filter on the pressure pipe. The pressure guiding pipe belongs to a small-caliber process pipeline with a small aperture, in order to ensure the filtering effect, the diameter of the filter screen plate is larger than the diameter of the pressure guiding pipe, so that the filtering area of the filter screen plate is larger than the flow passage area of the pressure guiding pipe, the radial sizes of the first shell and the second shell for clamping the filter screen plate are also larger than the diameter of the pressure guiding pipe, and the filter integrally forms a large-caliber filter with the radial size larger than the diameter of the pressure guiding pipe.

On one hand, part of the pressure guiding pipe is arranged in a narrow space and cannot accommodate the large-caliber filter, so that the large-caliber filter cannot be arranged; on the other hand, the bolts connecting the first shell, the second shell and the filter screen plate are easy to rust and break, so that the first large-diameter filter is damaged, natural gas leaks from the filter, and great potential safety hazards exist. And because the pipe diameter of the pressure guiding pipe is limited, the filter area is difficult to increase by adopting a mode of increasing a filter structure in the filter, so that the natural gas in the pressure guiding pipe in a narrow space cannot be effectively filtered, the process pipeline is easy to block, and the normal operation is influenced.

The invention patent application with application publication number CN109847432A discloses a pipe column type filter and a filtering method, wherein a filtering device is arranged in a vertical main pipe of a tee joint, and a plurality of lining slots which are uniformly distributed are arranged on the pipe walls of a lining sieve pipe and a filtering sieve pipe and are used for filtering water flowing in from a horizontal branch pipe and an outer annular space. The filtering sieve tube of the filter has an annular structure, can only be installed in an oil pipe for use, and cannot be installed on a small-caliber process pipeline for use.

The invention patent application with application publication number CN107774037A discloses a filter pipeline, wherein a filter screen device is detachably connected to two joints between three sections of pipeline bodies of the filter pipeline, a filter screen is arranged in the middle of the filter screen device, and the diameter of the filter screen does not exceed the inner diameter of the pipeline body. The diameter of the filter screen of the filtering device does not exceed the inner diameter of the pipeline body, so that the filtering effect is difficult to meet when the filtering device is installed on a small-caliber process pipeline.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a filter to solve the technical problem that the filter in the prior art can not be installed on a small-caliber process pipeline in a narrow space; an object of the utility model is also to provide a process line for natural gas exploitation who solves above-mentioned technical problem.

In order to achieve the above object, the technical solution of the filter of the present invention is:

the filter includes:

a tubular body for being connected in series to a respective conduit;

the filter screen supporting seats are arranged in two numbers, and each filter screen supporting seat is provided with a fluid channel which extends along the axial direction of the tubular main body;

one end of each filter screen supporting seat is provided with an inclined end face, and the inclined end faces of the two filter screen supporting seats are mutually parallel and are oppositely arranged along the axial direction of the tubular main body;

the filter further comprises:

the filter screen is obliquely arranged in the tubular main body relative to the axis of the tubular main body and is clamped between the oblique end surfaces of the two filter screen supporting seats;

the supporting seat supporting structure is arranged in the tubular main body and used for axially supporting one of the filter screen supporting seats along the tubular main body;

the movable compression ring is detachably connected in the tubular main body and used for jacking another filter screen supporting seat to simultaneously compress the two filter screen supporting seats onto the supporting seat supporting structure.

The utility model has the advantages that: during the use, the filter screen centre gripping forms stable support to the filter screen through two filter screen supporting seats between the slope terminal surface of two filter screen supporting seats, and the activity clamping ring compresses tightly two filter screen supporting seats to supporting seat bearing structure, realizes the filter screen stable fixed in the tubulose main part, and the tubulose main part is established ties on corresponding pipeline, and the medium flows through from fluid passage, filters the impurity in the medium through the filter screen. The filter screen slope sets up in the tubulose main part for the filter area of filter screen is greater than the runner area of tubulose main part, can increase the filter area of filter screen under the condition that does not increase tubulose main part cross-sectional dimension, has both guaranteed that the filter can install on the small-bore technology pipeline of narrow space department, and can guarantee the filter effect of filter to small-bore technology pipeline, avoids the pipeline to block.

As the preferred technical scheme, the filter screen supporting seat is a supporting cylinder, the end face of one end of the supporting cylinder is an inclined face, and the inclined face forms the inclined end face.

Has the advantages that: the filter screen supporting seat is arranged as the supporting cylinder, so that the supporting stability of the filter screen in the tubular main body is improved, and the filter screen is effectively prevented from loosening or deforming to influence the filtering effect.

Preferably, the outer circumferential surface of the support cylinder is fitted with the inner wall surface of the tubular main body;

the filter screen comprises a net-shaped main body and an annular sealing part, and the annular sealing part is arranged at the edge of the net-shaped main body;

the annular sealing part is clamped between the two inclined end faces and forms annular sealing with the inclined end faces, so that the two supporting cylinders and the annular sealing part enclose a flow passage.

Has the advantages that: the medium can be ensured to flow through the flow passage and be filtered by the filter screen, which is beneficial to improving the filtering effect of the filter.

Preferably, the annular sealing part is made of an elastic material, so that when the two supporting cylinders clamp the annular sealing part, the annular sealing part forms an annular seal with the inclined end face through deformation and is in sealing fit with the inner wall face of the tubular main body.

Has the advantages that: the sealing performance between the annular sealing part and the supporting cylinder is improved, and the filtering effect of the filter is further improved.

Preferably, the inclined end surface intersects with the other end surface of the support cylinder.

Has the advantages that: the axial dimension of the filter screen supporting seat is favorably reduced, so that the overall axial dimension of the filter is favorably reduced, and the miniaturization design of the filter is favorably realized.

As the preferred technical scheme, the supporting seat supporting structure is an annular baffle table.

Has the advantages that: the supporting seat supporting structure is simple in structure and convenient to design and process.

As a preferred technical scheme, the movable press ring is in threaded connection with the inside of the tubular main body.

Has the advantages that: the movable press ring and the tubular main body are convenient to fix and detach.

According to a preferable technical scheme, the movable press ring is provided with a screwing structure which is used for being matched with a screwing tool, and the movable press ring is rotated by the screwing tool.

Has the advantages that: the movable compression ring is convenient to screw and rotate, and the fixing and the dismounting between the movable compression ring and the tubular main body are further convenient.

As a preferred technical solution, the two ends of the tubular main body are provided with joints for detachable connection with corresponding pipelines, and the two joint structures are the same.

Has the advantages that: the two joint structures are the same, and when the filter is installed, the connecting ends of the joints do not need to be distinguished, so that the filter is conveniently installed on a pipeline.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a process pipeline for natural gas production comprising: the device comprises a conveying pipeline, a pressure guiding pipe and a pressure detection device, wherein one end of the pressure guiding pipe is connected with the conveying pipeline, and the other end of the pressure guiding pipe is connected with the pressure detection device, so that natural gas in the conveying pipeline is guided to the pressure detection device through the pressure guiding pipe, and the pressure detection of the natural gas in the conveying pipeline is realized;

the pressure guiding pipe is connected with a filter and is used for filtering impurities in the natural gas;

the filter includes:

a tubular body for being connected in series to a respective conduit;

the filter further comprises:

Drawings

Figure 1 is a cross-sectional view of a front view of a filter embodiment 1 of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1 (the first support cylinder is hidden in the drawing, and the filter screen and the second support cylinder are not cut);

fig. 3 is a top view of fig. 1.

In the figure: 1-a tubular body; 2, moving a compression ring; 3-an annular blocking platform; 6, filtering a screen; 401-a first support cartridge; 402-a second support cylinder; 501-a first joint; 502-a second joint; 403-inclined end faces.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The utility model discloses a concrete embodiment 1 of filter:

the utility model discloses a filter is the straight tube structure, and both ends processing has the internal thread, and the internal screw thread opposite side in both ends is equipped with the annular respectively and keeps off platform and activity clamping ring, and the annular keeps off the opposite side of platform and activity clamping ring and installs respectively and support a section of thick bamboo, and the filter screen slope is installed between two support sections of thick bamboo, supports a section of thick bamboo through rotating the extrusion of activity clamping ring, fixes the filter screen in the tubulose main part. The middle part of the filter is provided with a flow passage for the medium to flow through for filtering the impurities in the medium. The following takes the example of the filter being mounted on the pressure pipe of the natural gas extraction process pipeline, and the specific structure and use method of each part of the filter are specifically described with reference to the accompanying drawings:

as shown in fig. 1 to 3, the filter includes a tubular main body 1, a filter screen 6, an annular baffle table 3, a movable press ring 2 and two support cylinders, the two support cylinders are respectively a first support cylinder 401 and a second support cylinder 402, the two support cylinders constitute a filter screen support seat, an inner hole of each support cylinder constitutes a fluid channel, and the annular baffle table 3 constitutes a support seat support structure. The tubular main body 1 is a straight pipe, an inner hole of the straight pipe is used for natural gas to flow through, and the natural gas is the medium. The filter screen 6 is arranged inside the tubular body 1 obliquely with respect to the axis of the tubular body 1. The end surfaces of one end of the two supporting cylinders are inclined surfaces which form inclined end surfaces 403, the inclined end surfaces 403 of the two supporting cylinders are arranged oppositely along the axial direction of the tubular main body 1, and the filter screen 6 is clamped between the inclined end surfaces 403 of the two supporting cylinders so as to support the filter screen 6 through the supporting cylinders. The annular keeps off platform 3 and fixes in tubulose

main part

1, and 2 releasable connections of activity clamping ring are in tubulose main part 1, and above-mentioned two support section of thick bamboo keep off platform 3 through the annular and compress tightly on activity clamping ring 2, realize the filter screen 6 stable fixed in tubulose main part 1.

A plane perpendicular to the central line of the tubular main body 1 is taken as a first plane, a plane perpendicular to the first plane is taken as a second plane, and the plane where the filter screen 6 is located and the first plane form an acute angle or an obtuse angle, so that the projection of the filter screen 6 on the first plane is circular, and the projection of the filter screen on the second plane is elliptical. The projection of the inclined end surface 403 on the first plane is circular and the projection on the second plane is elliptical.

As shown in fig. 1 and 2, the upper and lower ends of the tubular main body 1 are provided with openings, wherein one end is opened for natural gas to flow in, and the other end is opened for natural gas to flow out. The upper end and the lower end of the tubular main body 1 are both provided with internal threads at the opening, the part of the tubular main body 1 provided with the internal threads is used as a joint of the tubular main body 1, the two joints are respectively a first joint 501 and a second joint 502, the first joint 501 and the second joint 502 are respectively used for being connected with a pressure guiding pipe of a natural gas production process pipeline, and a filter is connected on the pressure guiding pipe in series. It should be noted that the first joint 501 and the second joint 502 have the same structure, so that both end openings can be used as the inlet or the outlet of the filter without any directional limitation.

As shown in fig. 1, the two support cylinders have the same structure, and two end faces of the two support cylinders, which are opposite to each other, are planes and are respectively in blocking fit with the annular blocking table 3 and the movable compression ring 2; the inclined end faces 403 of each support cylinder intersect a plane. The filter screen 6 comprises a net-shaped main body and an annular sealing part, the annular sealing part is arranged at the edge of the net-shaped main body, the thickness of the annular sealing part is larger than that of the net-shaped main body, and the annular sealing part is made of elastic materials. The inner diameter of the annular sealing part is consistent with the inner diameters of the two supporting cylinders, and the outer diameters of the annular sealing part and the two supporting cylinders are consistent with the inner diameter of the tubular main body 1. The annular sealing part is clamped between the inclined end faces 403 of the first supporting cylinder 401 and the second supporting cylinder 402, and the annular sealing part is elastically deformed under the extrusion action of the two supporting cylinders, so that the annular sealing part and the inclined end faces 403 form an annular seal and are in sealing fit with the inner wall face of the tubular main body 1.

Above-mentioned annular keeps off platform 3 and comprises the inside round annular bulge of tubulose main part 1, the annular keeps off the internal diameter that platform 3 is unanimous with the internal diameter of tubulose main part 1, filter screen 6 fixes back in tubulose main part 1, the outer peripheral face of annular sealing, the outer peripheral face of two support cylinders all laminates with the internal face adaptation of tubulose main part 1, make movable clamping ring 2, the annular keeps off platform 3, two support cylinders enclose with the annular sealing of filter screen 6 and become to overflow the passageway, the natural gas that flows through this passageway that overflows passes through filter screen 6 and realizes filtering.

As shown in fig. 1 and 2, an external thread is processed on the outer side of the movable press ring 2, the external thread is matched with an internal thread on the tubular main body 1, and the movable press ring 2 is connected inside the tubular main body 1 in a threaded manner. As shown in fig. 3, the inner hole of the movable compression ring 2 is a hexagonal hole, and the hexagonal hole is used as a screwing structure and adapted to a screwing tool, and the movable compression ring 2 is screwed by the screwing tool to realize the dismounting and mounting of the movable compression ring 2. It should be noted that the external thread of the movable compression ring 2 is only connected with a part of the internal thread of the tubular main body 1, and does not affect the threaded connection between the tubular main body 1 and the pressure guiding pipe.

The utility model discloses a concrete application method of filter: firstly, placing a tubular main body 1 in a mode that one end of an annular baffle table 3 is downward, placing a second supporting cylinder 402 into the tubular main body 1 in a mode that a plane is downward, and enabling the plane of the second supporting cylinder 402 to be in contact with the periphery of the annular baffle table 3 and to be in stop fit; then, the filter screen 6 is obliquely placed in the tubular main body 1; then, the first support cylinder 401 is placed into the tubular main body 1 in a manner that the inclined end face 403 faces downwards, the annular sealing portions are ensured to be respectively contacted with the periphery of the inclined end face 403 of the corresponding support cylinder, the movable press ring 2 is screwed in the tubular main body 1 in a threaded manner, the movable press ring 2 is screwed until the two support cylinders clamp the filter screen 6, at the moment, the tubular main body 1 is completely divided into an upper end and a lower end by the filter screen 6, the flow passage is established, and the filter is connected into the pressure guiding pipe through the first connector 501 and the second connector 502, so that the filtering function is realized.

In the specific design, the aperture of the tubular main body 1 is set according to the aperture of the pressure guiding pipe, for example, the aperture of the tubular main body 1 is set to be consistent with the aperture of the pressure guiding pipe, or the aperture of the tubular main body 1 is slightly larger or slightly smaller than the aperture of the pressure guiding pipe, so that even if the pressure guiding pipe is located in a narrow space, the installation of the filter on the pressure guiding pipe can be ensured. The inclination angle of filter screen 6 can set up as required to increase or reduce filter area of filter screen 6, guaranteeing that the filter can be under the condition of pressing the pipe installation, rationally set up filter area of filter screen 6, reach the purpose of effectively filtering impurity in the natural gas.

In addition, filter screen 6, annular keep off platform 3, activity clamping ring 2 and two support sections of thick bamboo all set up in tubulose main part 1, and do not need the fastener to realize the fixed between each part, can effectively avoid because the filter internal part damages, the natural gas leakage problem that causes. The filter has no other openings except the openings at the upper end and the lower end, so that sealing points between the filter and the pressure leading pipe can be effectively reduced, the problem of natural gas leakage at the joint is avoided, and the safety of the process pipeline production process is favorably improved. In the use, when needing to clear up filter screen 6 department impurity, pull down movable clamping ring 2 and take out first support section of thick bamboo 401, filter screen 6 and second support section of thick bamboo 402 from tubular main part 1, can clear up the impurity in the tubular main part 1.

In the embodiment, the filter is arranged on a pressure guiding pipe of a process pipeline for natural gas exploitation and is used for filtering impurities in natural gas; in other embodiments, the filter can be installed on any pipeline with gas or liquid as the medium, and only the size of the tubular body 1, the mesh number of the filter screen 6, the inclination angle of the filter screen 6, and the like need to be designed according to needs.

The utility model discloses a concrete embodiment 2 of filter:

it differs from the above example 1 mainly in that: the filter screen supporting seat in the above embodiment 1 is a supporting cylinder. The filter screen supporting seat in this embodiment includes backup pad and support column, and support column one end is fixed in the backup pad, the other end overhang setting. The support plate is an elliptical annular plate, the end face, away from the support column, of one end of the elliptical annular plate is an inclined end face and used for clamping the filter screen, and the end, away from the support column, of the support column is used for being matched with the annular blocking table or the movable pressing ring in a blocking mode, so that the filter screen is stably fixed in the tubular main body.

The utility model discloses a concrete embodiment 3 of filter:

it differs from the above example 1 mainly in that: the filter screen in the above embodiment 1 includes a mesh main body and an annular seal portion provided at an edge of the mesh main body, the annular seal portion being sandwiched between two inclined end surfaces. The filter screen in this embodiment only includes a mesh body, the edge of which is clamped between two inclined end faces.

The utility model discloses a specific embodiment 4 of filter:

it differs from the above example 1 mainly in that: the annular seal portion in embodiment 1 described above is made of an elastic material. In this embodiment, the annular sealing portion is made of a metal material, and the sealing performance between the annular sealing portion and the inclined end surface is ensured by the machining precision.

The utility model discloses a concrete embodiment 5 of filter:

it differs from the above example 1 mainly in that: the inner hole of the movable compression ring in the embodiment 1 is a hexagonal hole, and the hexagonal hole forms the screwing structure. In this embodiment, the inner hole of the movable compression ring is a rectangular hole, and the rectangular hole forms the screwing structure and is adapted to a screwing tool. Of course, in other embodiments, the inner hole of the movable pressure ring may also be circular, and at this time, a blind hole may be disposed on the hole wall of the movable pressure ring, the blind hole extends axially along the movable pressure ring, and the hole opening faces upward, and the blind hole is adapted to the screwing tool.

The utility model discloses a specific embodiment 6 of filter:

it differs from the above example 1 mainly in that: the supporting seat supporting structure in embodiment 1 is an annular blocking platform, and the supporting seat supporting structure in this embodiment is a protruding block, the protruding block is provided with more than two protruding blocks, and the protruding blocks are uniformly distributed at intervals along the circumferential direction of the tubular main body. The movable compression ring compresses the two supporting cylinders onto the convex block, so that the filter screen is stably fixed in the tubular main body.

The utility model discloses a concrete embodiment 7 of filter:

it differs from the above example 1 mainly in that: the inclined end surface of the support cylinder in embodiment 1 described above intersects the plane of the other end. The inclined end surface of the support cylinder in this embodiment intersects only the outer peripheral surface.

The utility model discloses a concrete embodiment of a process line for natural gas exploitation:

the process pipeline for natural gas exploitation comprises a conveying pipeline, a pressure leading pipe and a pressure detection device, wherein one end of the pressure leading pipe is connected with the conveying pipeline, and the other end of the pressure leading pipe is connected with the pressure detection device, so that natural gas in the conveying pipeline is drained to the pressure detection device through the pressure leading pipe, and pressure detection of natural gas in the conveying pipeline is realized.

The pressure guiding pipe is connected with a filter for filtering impurities in the natural gas. The filter structure is the same as that in the above filter embodiment 1, and is not described again. Of course, the filter of any of embodiments 2-7 above may be used in other embodiments.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter, characterized by comprising:

a tubular body for being connected in series to a respective conduit;

the filter further comprises:

2. The filter of claim 1, wherein the screen support is a support cylinder, and an end surface of the support cylinder is an inclined surface, the inclined surface forming the inclined end surface.

3. The filter of claim 2, wherein the outer peripheral surface of the support cylinder is fitted to the inner wall surface of the tubular body;

4. The filter of claim 3, wherein the annular seal portion is made of an elastic material so that when the annular seal portion is held between the two support cylinders, the annular seal portion deforms to form an annular seal with the inclined end surface and to sealingly engage with the inner wall surface of the tubular body.

5. A filter as claimed in any one of claims 2 to 4, wherein the inclined end face intersects the other end face of the support cylinder.

6. A filter as claimed in any one of claims 1 to 4 wherein the support base support structure is an annular shelf.

7. A filter according to any of claims 1-4, wherein the movable collar is threaded inside the tubular body.

8. The filter of claim 7, wherein the movable collar includes a screw structure for engaging a screw tool for rotating the movable collar with the screw tool.

9. A filter according to any one of claims 1-4, wherein the tubular body is provided with fittings at both ends for detachable connection to respective conduits, the fittings being of the same construction.

10. A process pipeline for natural gas production comprising: the device comprises a conveying pipeline, a pressure guiding pipe and a pressure detection device, wherein one end of the pressure guiding pipe is connected with the conveying pipeline, and the other end of the pressure guiding pipe is connected with the pressure detection device, so that natural gas in the conveying pipeline is guided to the pressure detection device through the pressure guiding pipe, and the pressure detection of the natural gas in the conveying pipeline is realized;

the filter of any one of claims 1 to 9 is used as the filter.