Fine filtering and desanding equipment

Abstract

The utility model discloses fine filtering and desanding equipment which comprises an input connector, an output connector and a desanding pipeline connected with the input connector and the output connector. The sand removal pipeline comprises a filter cartridge pipe joint, an upstream middle joint and a downstream middle joint which are respectively connected to two ends of the filter cartridge pipe joint, an upstream valve connected with the upstream middle joint, and a downstream valve connected with the downstream middle joint; the upstream valve is connected with the input connector, and the downstream valve is connected with the output connector. According to the desanding pipeline, fine gravel in fluid can be filtered out, the impact of high-speed gravel on a subsequent external pipe network is reduced, and production equipment such as a separator and the pipe network is protected.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas field tools technology, specifically to a fine filtration and sand removal device. Background Technology

[0002] Shale gas well flowback is a process of discharging injected fluid and producing gas. The discharged fluid mainly consists of fracturing fluid, natural gas, gravel, and a small amount of proppant. During flowback, gravel separation is necessary. Common desanding methods involve first using a desander to separate and discharge most of the gravel, and then having the mixture pass through a separator for oil, gas, liquid, and sand separation. However, because some gravel particles are very small, traditional gravity or cyclone separators may not be able to effectively capture them, resulting in fine sand remaining in the oil and water. This affects the stable operation of subsequent pumps, valves, pipelines, and storage tanks. Furthermore, the impact of high-speed gravel mixed in with the fluid accelerates the wear of the separator's inner wall, valves, and sand discharge pipes, shortening equipment life and increasing maintenance costs. Utility Model Content

[0003] To address the aforementioned issues, this application provides a fine filtration and sand removal device that can effectively remove fine sand, silt, and impurities from the separator's gas pipeline, effectively protecting downstream equipment and external pipelines from damage.

[0004] The purpose of this utility model is achieved through the following technical solution: a fine filtration and sand removal device, which includes: an input connector and an output connector, and a sand removal pipeline connecting the input connector and the output connector;

[0005] The sand removal pipeline includes a filter cartridge manifold, an upstream intermediate connector and a downstream intermediate connector connected to both ends of the filter cartridge manifold, an upstream valve connected to the upstream intermediate connector, and a downstream valve connected to the downstream intermediate connector; the upstream valve is connected to an input connector, and the downstream valve is connected to an output connector.

[0006] The sand removal pipeline of this invention can filter out fine sand and gravel in the fluid, reduce the impact of high-speed sand and gravel on the subsequent external pipeline network, and protect production equipment such as separators and pipelines.

[0007] The number of sand removal pipelines is at least two, and the sand removal pipelines are connected in parallel. The design of multiple sand removal pipelines allows the equipment to switch to another sand removal pipeline while cleaning one sand removal pipeline, without affecting normal mining and drainage operations.

[0008] The filter cartridge manifold includes an outer tube connecting the upstream intermediate connector and the downstream intermediate connector, and a filter cartridge assembly that is detachably installed inside the outer tube.

[0009] The filter cartridge assembly includes a filter cartridge and a filter screen that is detachably installed inside the filter cartridge; the filter cartridge has several through holes circumferentially arranged on its wall.

[0010] During the extraction and discharge process, liquids and gases can pass through the filter screen and through holes and then be discharged from the filter cartridge, while sand and gravel are trapped inside the filter cartridge, achieving a good filtration effect.

[0011] The filter screen is detachably installed inside the filter cartridge via threads; the threads are located at the end of the filter cartridge near the upstream intermediate connector, and a straightening sleeve is provided at the end of the filter cartridge near the downstream intermediate connector.

[0012] The detachable filter screen makes it easier to clean and replace, while the straightening sleeve allows the filter cartridge to be installed more stably inside the cartridge.

[0013] The upstream intermediate connector and / or downstream intermediate connector are equipped with plugs, and the filter cartridge assembly can be easily replaced after the plugs are removed.

[0014] The threaded connection and / or the straightening sleeve are provided with a handle to facilitate the removal of the filter cartridge assembly from the outer tube.

[0015] The input connector is equipped with an upstream pressure gauge for detecting the pressure at the input end of the sand removal pipeline, and the output connector is equipped with a downstream pressure gauge for detecting the pressure at the output end of the sand removal pipeline. By comparing the pressure difference between the upstream and downstream of the filter cartridge assembly, it can be determined whether the filter screen needs to be cleaned or replaced.

[0016] Both the upstream and downstream intermediate joints are equipped with pressure relief valves.

[0017] The fine filtration and sand removal equipment also includes a support base plate, on which lifting lugs are provided. The input connector, output connector, and sand removal pipeline are all located on the support base plate.

[0018] Compared with the prior art, this application has the following beneficial effects: the sand removal pipeline of this utility model can filter out fine sand and gravel in the fluid, reduce the impact of high-speed sand and gravel on the downstream external pipeline network, and protect production equipment such as separators and pipelines.

[0019] Some of the additional features of this application will be described in the following description. These additional features will become apparent to those skilled in the art upon examination of the following description and the accompanying drawings, or upon understanding the production or operation of the embodiments. The features disclosed in this application can be implemented and achieved through the practice or use of various methods, means, and combinations thereof with respect to the specific embodiments described below. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0021] Figure 1 This is a top view of the fine filtration and sand removal equipment of this utility model.

[0022] Figure 2 This is a structural diagram of the filter cartridge assembly of this utility model.

[0023] The reference numerals in the above figures are as follows: 1-Input connector, 2-Upstream pressure gauge, 3-Upstream valve, 5-Upstream intermediate connector, 7-Support base plate, 8-Lifting lug, 9-Outer pipe, 10-Plug, 11-Downstream intermediate connector, 12-Downstream valve, 13-Output connector, 14-Downstream pressure gauge, 15-Handle, 16-Thread, 17-Filter cartridge, 18-Filter screen, 19-Straightening sleeve, 20-Pressure relief valve. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments.

[0025] Example 1

[0026] like Figure 1 , 2 As shown in the figure, this embodiment discloses a fine filtration and sand removal device, which includes: an input connector 1, an output connector 13, and a sand removal pipeline, wherein the sand removal pipeline is connected to the input connector 1 and the output connector 13.

[0027] In use, input connector 1 connects to the upstream downhole equipment, while output connector 13 connects to the downstream pipeline equipment. The fluid returned from the shale gas well is filtered by a fine filtration and desanding device before being transported to the downstream pipeline equipment. In this embodiment, both input connector 1 and output connector 13 can be implemented using a five-way fitting. One port of the five-way fitting connects to the desanding pipeline, the other port connects to external equipment, and the remaining unused ports are sealed with blind flanges.

[0028] Additionally, the sand removal pipeline includes a filter cartridge manifold, with an upstream intermediate connector 5 and a downstream intermediate connector 11 connected to both ends of the manifold, an upstream valve 3 connected to the upstream intermediate connector 5, and a downstream valve 12 connected to the downstream intermediate connector 11. The upstream valve 3 is connected to one interface of the input connector 1, and the downstream valve 12 is connected to one interface of the output connector 13. Thus, after the fluid enters from the input connector 1, it passes through the upstream valve 3 and the upstream intermediate connector 5 in sequence before entering the filter cartridge manifold. After filtration by the filter cartridge manifold, the sand and gravel in the fluid are trapped within the manifold, while the liquid and gas pass through the downstream intermediate connector 11 and the downstream valve 12 in sequence, and finally exit from the output connector 13 to the downstream equipment.

[0029] Specifically, the filter cartridge manifold includes an outer tube 9 connecting the upstream intermediate connector 5 and the downstream intermediate connector 11, and a filter cartridge assembly detachably installed inside the outer tube 9. For example... Figure 2 As shown, the filter cartridge assembly includes a filter cartridge 17 and a filter screen 18 detachably installed inside the filter cartridge 17. The filter cartridge 17 has several through holes circumferentially arranged on its wall, and there is a gap between the filter cartridge 17 and the outer pipe 9. During operation, liquids and gases in the fluid can pass through the filter screen 18 and the through holes and be discharged into the gap between the filter cartridge 17 and the outer pipe 9, and then be transported to downstream equipment, while sand and gravel are trapped inside the filter cartridge 17. In practice, by replacing the filter screen 18 with one of different mesh sizes, fine sand and gravel in the fluid can be filtered out, reducing the impact of high-speed sand and gravel on the downstream external pipeline network and protecting production equipment such as separators and pipelines.

[0030] In practical implementation, both the upstream intermediate connector 5 and the downstream intermediate connector 11 are four-way pipe fittings, and the outer pipe 9 can be connected to the upstream intermediate connector 5 and the downstream intermediate connector 11 via flanges. The filter cartridge 17 is a circular tube with one end open and the other end closed. The filter screen 18 is also cylindrical in shape, and its diameter matches the inner diameter of the filter cartridge 17 for easy installation inside the filter cartridge 17. Specifically, the filter screen 18 is detachably installed inside the filter cartridge 17 via threads 16. After the filter screen 18 is installed inside the filter cartridge 17, the connecting end of the threads 16 is screwed into the opening of the filter cartridge 17. The threads 16 press the filter screen 18, fixing it inside the filter cartridge 17. After removing the threads 16, the filter screen 18 can be removed for easy cleaning and replacement. The threads 16 have a hollow structure, so fluid can enter the interior of the filter cartridge 17 through the threads 16.

[0031] One end of the filter cartridge 17 is near the upstream intermediate connector 5, and a threaded fastener 16 is installed on the opening of the filter cartridge 17. A straightening sleeve 19 is provided at the end of the filter cartridge 17 near the downstream intermediate connector 11. Figure 2As shown. A sealing sleeve is provided on the outer periphery of the thread 16, and a sealing sleeve is also provided at the end of the straightening sleeve 19. The diameter of the sealing sleeve is slightly larger than the inner diameter of the outer tube 9. In this way, after the filter cartridge assembly is installed inside the outer tube 9, the sealing sleeve forms a seal with the inner wall of the outer tube 9, and at the same time, it can also fix the filter cartridge assembly inside the outer tube 9. The straightening sleeve 19 is a hollow tube, which is welded to the end of the filter cartridge 17. The sealing sleeve is located at the end of the straightening sleeve 19 away from the filter cartridge 17, while the side wall of the end of the straightening sleeve 19 closest to the filter cartridge 17 has an opening. In use, after the fluid enters the outer pipe 9 through the upstream valve 3 and the upstream intermediate joint 5, the fluid can only enter the filter cartridge 17 due to the sealing effect of the sealing sleeve on the thread 16. After being filtered by the filter screen 18, the sand and gravel are trapped inside the filter cartridge 17, while the liquid and gas are discharged through the through holes on the filter screen 18 and the filter cartridge 17 into the gap between the filter cartridge 17 and the outer pipe 9. The liquid and gas flow forward. Since the sealing sleeve on the straightening sleeve 19 forms a seal with the outer pipe 9, the liquid and gas enter the interior of the straightening sleeve 19 through the opening on the straightening sleeve 19, and enter the downstream intermediate joint 11 along the straightening sleeve 19 for downstream transport.

[0032] During installation, first connect the outer tube 9 to the upstream intermediate connector 5 and the downstream intermediate connector 11. Then, insert the filter cartridge assembly into the outer tube 9 through the interface on the upstream intermediate connector 5 opposite to the outer tube 9. Due to the elasticity of the sealing sleeve, although the diameter of the sealing sleeve is slightly larger than the inner diameter of the outer tube 9, the filter cartridge assembly can still be inserted into the outer tube 9 under the action of thrust. A plug 10 can be installed on the interface on the upstream intermediate connector 5 opposite to the outer tube 9. Unused interfaces on the upstream intermediate connector 5 can be sealed with blind flanges. After removing the plug 10, the filter cartridge assembly can be pulled out of the outer tube 9. Alternatively, a plug 10 can also be installed on the interface on the downstream intermediate connector 11 opposite to the outer tube 9. After removing the plug 10, the filter cartridge assembly can also be pulled out of the outer tube 9. Unused interfaces on the downstream intermediate connector 11 can also be sealed with blind flanges.

[0033] In addition, the threaded fastener 16 and / or the straightening sleeve 19 are provided with a handle 15, which makes it easier to pull the filter cartridge assembly out of the outer tube 9 by holding the handle 15.

[0034] With the above structure, when it is necessary to clean or replace the filter screen 18, close the upstream valve 3 and the downstream valve 12, remove the plug 10, and pull out the filter cartridge assembly to clean or replace the filter screen 18.

[0035] Even after closing upstream valve 3 and downstream valve 12, significant pressure will still exist in the pipeline between them. Removing plug 10 prematurely could pose operational risks. Therefore, in some alternative embodiments, pressure relief valves 20 are installed on both the upstream intermediate joint 5 and the downstream intermediate joint 11. Pressure can be released through these valves before removing plug 10.

[0036] In some other embodiments, the input connector 1 is equipped with an upstream pressure gauge 2 for detecting the pressure at the input end of the sand removal pipeline, and the output connector 13 is equipped with a downstream pressure gauge 14 for detecting the pressure at the output end of the sand removal pipeline. During operation, if the pressure detected by the upstream pressure gauge 2 is greater than the pressure detected by the downstream pressure gauge 14, and the pressure difference is greater than a certain value, it indicates that there is a large amount of sand and gravel trapped in the filter cartridge 17, and the filter screen 18 is blocked, which has affected the downstream flow of fluid, resulting in the upstream pressure of the filter cartridge manifold being greater than the downstream pressure. In this case, the filter screen 18 needs to be cleaned or replaced.

[0037] In some other embodiments, the fine filtration and sand removal equipment also includes a support base plate 7, on which lifting lugs 8 are provided. The aforementioned input connector 1, output connector 13, and sand removal pipeline are all installed on the support base plate 7, thus facilitating the movement of the entire fine filtration and sand removal equipment.

[0038] Example 2

[0039] This embodiment is basically the same as Embodiment 1, except that the fine filtration and sand removal equipment in this embodiment has at least two sand removal pipelines, which are connected in parallel. Specifically, there are two sand removal pipelines in this embodiment. During operation, one sand removal pipeline is active, while the other is in standby mode. When the active sand removal pipeline needs cleaning or replacement of the filter screen 18, the upstream valve 3 and downstream valve 12 on that pipeline are closed, and the upstream valve 3 and downstream valve 12 on the other sand removal pipeline are opened, switching that sand removal pipeline to active mode. Simultaneously, the filter screen 18 that needs cleaning or replacement is processed, thus not affecting normal sampling and discharge operations and improving operational efficiency.

[0040] It should be noted that all features disclosed in this specification, or all steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0041] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A fine filtration and sand removal device, characterized in that, include: Input connector (1) and output connector (13), and sand removal pipeline connecting the input connector (1) and output connector (13); The sand removal pipeline includes a filter cartridge manifold, an upstream intermediate connector (5) and a downstream intermediate connector (11) respectively connected to both ends of the filter cartridge manifold, an upstream valve (3) connected to the upstream intermediate connector (5), and a downstream valve (12) connected to the downstream intermediate connector (11); the upstream valve (3) is connected to the input connector (1), and the downstream valve (12) is connected to the output connector (13); The filter cartridge manifold includes an outer tube (9) connecting an upstream intermediate connector (5) and a downstream intermediate connector (11), and a filter cartridge assembly detachably installed inside the outer tube (9); the filter cartridge assembly includes a filter cartridge (17) and a filter screen (18) detachably installed inside the filter cartridge (17); the filter cartridge (17) has several through holes circumferentially arranged on its wall; the filter screen (18) is detachably installed inside the filter cartridge (17) by means of a thread (16); the thread (16) is located at one end of the filter cartridge (17) near the upstream intermediate connector (5), and a straightening sleeve (19) is provided at one end of the filter cartridge (17) near the downstream intermediate connector (11). A sealing sleeve is provided on the outer periphery of the threaded joint (16), and a sealing sleeve is also provided at the end of the straightening sleeve (19). The diameter of the sealing sleeve is slightly larger than the inner diameter of the outer tube (9) so that after the filter cartridge assembly is installed in the outer tube (9), the sealing sleeve forms a seal with the inner wall of the outer tube (9) and can also fix the filter cartridge assembly inside the outer tube (9). The straightening sleeve (19) is a hollow tube and is welded to the end of the filter cartridge (17). The sealing sleeve is located on the straightening sleeve (19) away from the filter cartridge (17). The straightening sleeve (19) has an opening on the side wall of the end closest to the filter cylinder (17). After the fluid enters the outer tube (9), it can only enter the filter cylinder (17). After being filtered by the filter screen (18), the sand and gravel are trapped inside the filter cylinder (17). The liquid and gas are discharged through the through holes on the filter screen (18) and the filter cylinder (17) to the gap between the filter cylinder (17) and the outer tube (9), and enter the interior of the straightening sleeve (19) through the opening on the straightening sleeve (19), and enter the downstream intermediate joint (11) along the straightening sleeve (19).

2. The fine filtration and sand removal equipment according to claim 1, characterized in that, The number of sand removal pipelines is at least two, and the sand removal pipelines are connected in parallel.

3. The fine filtration and sand removal equipment according to claim 1, characterized in that, A plug (10) is provided on the upstream intermediate joint (5) and / or the downstream intermediate joint (11).

4. The fine filtration and sand removal equipment according to claim 1, characterized in that, The threaded fastener (16) and / or the straightening sleeve (19) are provided with handles (15).

5. The fine filtration and sand removal equipment according to claim 1, characterized in that, The input connector (1) is equipped with an upstream pressure gauge (2) for detecting the pressure at the input end of the sand removal pipeline, and the output connector (13) is equipped with a downstream pressure gauge (14) for detecting the pressure at the output end of the sand removal pipeline.

6. The fine filtration and sand removal equipment according to claim 1, characterized in that, Pressure relief valves (20) are provided on both the upstream intermediate joint (5) and the downstream intermediate joint (11).

7. The fine filtration and sand removal equipment according to claim 1, characterized in that, It also includes a support base plate (7), on which a lifting lug (8) is provided, and the input connector (1), output connector (13) and sand removal pipeline are all provided on the support base plate (7).

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