Cleaning device for gravity separator

Abstract

The utility model relates to the technical field of oil and gas field gas production processes, in particular to a cleaning device for a gravity separator, which comprises a box body, a filter cavity is arranged in the box body, an opening is arranged at the top of the box body, a filter component is arranged in the filter cavity and is connected with the box body, and the filter component is connected with the box body. The filtering assembly divides the filtering cavity into an upper pre-filtering space and a lower post-filtering space, and the opening is communicated with the pre-filtering space; the box body is provided with an anti-explosion pump, the anti-explosion pump is communicated with the post-filtration space, the anti-explosion pump can be communicated with a maintenance opening of the gravity separator through a pipeline, water and mud sand discharged from a liquid discharging opening of the liquid accumulation bag enter the box body, and the water and the mud sand are separated through the filtering assembly, so that the water enters the post-filtration space under the action of gravity; and the explosion-proof pump pumps water in the filtered space, pressurizes the water and injects the water into the inner cavity of the gravity separator, so that the continuous utilization of water resources is realized, the flushing efficiency is improved, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas production technology in oil and gas fields, and particularly relates to a cleaning device for a gravity separator. Background Technique

[0002] The volume fracturing process is a conventional process in gas production in oil and gas fields. While significantly increasing the single-well production, a large amount of sediment will flow into the pipeline during the volume fracturing process. To avoid erosion damage to process equipment and pipelines and ensure the safe production of gas wells, a gravity separator is used to separate the sediment.

[0003] However, due to the large amount of sand production in gas wells using the volume fracturing process, when too much sand accumulates in the inner cavity of the gravity separator, the liquid accumulation package of the gravity separator is blocked by the sediment, resulting in poor liquid drainage. In severe cases, liquid drainage cannot be carried out, affecting the liquid drainage efficiency of the gravity separator and even causing liquid leakage in the pipeline, affecting the production of gas wells. After the gravity separator is sand-blocked, a large amount of clean water is required to flush the inner cavity of the gravity separator to remove the sand blockage. The cleaning water source is directly discharged to the ground, resulting in waste of resources and low sand cleaning efficiency. Moreover, special equipment is required for sand cleaning operation of the gravity separator, increasing production costs.

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problems of waste of resources, low sand cleaning efficiency and increased production costs in the cleaning of the inner cavity of the gravity separator. Content of the Utility Model

[0005] The purpose of the utility model is to provide a cleaning device for a gravity separator aiming at the technical problems of waste of resources, low sand cleaning efficiency and increased production costs in the cleaning of the inner cavity of the gravity separator.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A cleaning device for a gravity separator includes a box body. A filtering cavity is arranged in the box body. An opening is arranged at the top of the box body. A filtering component is arranged in the filtering cavity. The filtering component is connected to the box body. The filtering component divides the filtering cavity into a pre-filtering space above and a post-filtering space below. The opening is communicated with the pre-filtering space.

[0008] An explosion-proof pump is arranged on the box body. The explosion-proof pump is communicated with the post-filtering space. The explosion-proof pump can be communicated with the maintenance port of the gravity separator through a pipeline.

[0009] A cleaning device for a gravity separator of the present utility model divides the filtration cavity into a pre-filtration space and a post-filtration space by arranging a filtration component in the box body. When cleaning the inner cavity of the gravity separator, water carrying sediment enters the pre-filtration space from the opening at the top of the box body and contacts the filtration component. Under the action of gravity, the water passes through the filtration component and enters the post-filtration space, while the sediment remains in the pre-filtration space on the top side of the filtration component. The explosion-proof pump pumps out the water in the post-filtration space, pressurizes it, and then discharges it into the inner cavity of the gravity separator to clean the inner cavity of the gravity separator, thus realizing the recycling of water, saving resources. The pressurized water can better clean the inner cavity of the gravity separator, accelerating the cleaning speed of the inner cavity of the gravity separator. The water passing through the gravity separator has a certain pressure, which can more quickly flush the inner cavity of the gravity separator, shortening the sand cleaning time, improving the sand cleaning efficiency, and saving the production cost.

[0010] As a preferred solution of the present utility model, the filtration component is provided with a lifting mechanism, one end of the lifting mechanism is connected to the filtration component, and the other end extends out of the box body from the opening. Operators can take out the filtration component from the opening through the lifting mechanism, which is convenient for cleaning the sediment on the filtration component; the sediment is a solid mixture of mud and sand.

[0011] As a preferred solution of the present utility model, the lifting mechanism is an L-shaped structural member, and the lifting mechanism includes a straight rod member and a bent member. One end of the straight rod member is connected to the filtration component, and the other end is hinged to the bent member. The bent member can be rotated to lean against the outer wall of the box body, reducing the occupied space of the lifting mechanism.

[0012] As a preferred solution of the present utility model, the filtration component includes a groove structural member and a filter screen. A plurality of through filtration channels are opened at the bottom of the groove of the groove structural member, and the filter screen is laid flat on the bottom of the groove. The sediment is carried in the groove structural member, which can prevent the sediment from falling into the post-filtration space when the filtration component is moved; the filter screen intercepts the sediment, allowing the water to enter the post-filtration space through the filtration channels, and the bottom of the groove supports the filter screen, ensuring that the filter screen can carry more sediment.

[0013] As a preferred solution of the present utility model, it further includes a flushing pipeline. One end of the flushing pipeline is connected to the explosion-proof pump, and the other end is provided with a flange. The flange can be cooperatively connected with the maintenance port of the gravity separator. The flange can be bolted to the maintenance port of the gravity separator, enabling the flushing pipeline to always drain water into the inner cavity of the gravity separator.

[0014] As a preferred embodiment of the present utility model, the flange is provided with an extension pipe for extending into the inner cavity of the gravity separator. The extension pipe is communicated with the flushing pipeline, and a spray head is arranged on the extension pipe. The extension pipe enables the spray head to be located in the middle of the inner cavity of the gravity separator. The spray head disperses water, enabling the water to flush multiple parts of the inner cavity of the gravity separator and improving the sand cleaning efficiency.

[0015] As a preferred embodiment of the present utility model, a liquid collecting hopper is arranged at the top of the box body. The liquid collecting hopper is a funnel-shaped structural member, and the liquid collecting hopper is communicated with the opening. The liquid collecting hopper increases the collection area of the box body and can reduce the leakage of water and sediment from the opening.

[0016] As a preferred embodiment of the present utility model, the box body is provided with a bracket, and a control unit is arranged on the bracket. The explosion-proof pump is connected to the bracket, and the control unit is controllably connected to the explosion-proof pump. The explosion-proof pump is fixed on the side wall of the box body through the bracket. The vibration generated during the operation of the explosion-proof pump can drive the box body to vibrate, thereby accelerating the separation of sediment and water by the filtering assembly; the bracket makes the connection between the explosion-proof pump and the box body firm; the operation state of the explosion-proof pump can be controlled through the control unit.

[0017] As a preferred embodiment of the present utility model, a support member is arranged in the filtering cavity. The support member is connected to the box body, and the support member abuts against the filtering assembly. The support member is arranged in the box body. The support member is an annular structural member arranged in the filtering cavity. The annular structural member is fixedly connected to the box body, enabling the support member to abut against the bottom of the filtering assembly, so that there is a gap between the filtering assembly and the bottom of the box body, and the filtered space has sufficient volume to accommodate the filtered water.

[0018] As a preferred embodiment of the present utility model, a plurality of guide wheels are arranged at the bottom of the box body, and a handrail is arranged on the box body. By arranging the handrail and the guide wheels, the operator can push the box body to a designated position for sand cleaning operations through the handrail, and the box body can be used for different gravity separators.

[0019] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0020] 1. A cleaning device for a gravity separator of the present utility model divides the filtering cavity into a pre-filter space and a post-filter space by arranging a filtering component in a box body. When cleaning the inner cavity of the gravity separator, water carrying sediment enters the pre-filter space from the opening at the top of the box body and contacts the filtering component. Under the action of gravity, the water passes through the filtering component and enters the post-filter space, while the sediment remains in the pre-filter space on the top side of the filtering component; the explosion-proof pump pumps out the water in the post-filter space, pressurizes it and discharges it into the inner cavity of the gravity separator to clean the inner cavity of the gravity separator, thereby realizing the recycling of water, saving resources. The pressurized water can better clean the inner cavity of the gravity separator, accelerating the cleaning speed of the inner cavity of the gravity separator; the water passing through the gravity separator has a certain pressure, which can more quickly flush the inner cavity of the gravity separator, shortening the sand cleaning time, improving the sand cleaning efficiency and saving the production cost.

[0021] 2. A cleaning device for a gravity separator of the present utility model has a simple structure and is convenient to use. When cleaning the inner cavity of the gravity separator, the water and sediment discharged from the liquid drainage port of the liquid accumulation bag enter the box body from the opening. The water and sediment are separated by the filtering component, enabling the water to enter the post-filter space under the action of gravity. The explosion-proof pump extracts and pressurizes the water in the post-filter space and injects it into the inner cavity of the gravity separator, thereby realizing the continuous utilization of water resources, improving the flushing efficiency, saving costs, and having good economic value and practical value. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a cleaning device for a gravity separator in Embodiment 1;

[0023] Figure 2 is a cross-sectional structural diagram of a cleaning device for a gravity separator in Embodiment 1;

[0024] Figure 3 is a schematic structural diagram of the filtering component in Embodiment 1;

[0025] Figure 4 is a schematic structural diagram of the lifting mechanism in Embodiment 1;

[0026] Figure 5 is a schematic structural diagram of the flange in Embodiment 2.

[0027] Icon:

[0028] 1 - Box body, 2 - Filter chamber, 3 - Opening, 4 - Filter assembly, 5 - Explosion-proof pump, 6 - Lifting mechanism, 7 - Flushing pipeline, 8 - Flange, 9 - Bracket, 10 - Control unit, 11 - Guide wheel, 12 - Handrail, 13 - Support member, 14 - Extension pipe, 15 - Sprinkler head, 21 - Space before filtration, 22 - Space after filtration, 41 - Grooved structural member, 42 - Filter screen, 43 - Filtration channel, 61 - Straight rod member, 62 - Bent member. Detailed implementation mode

[0029] The following will describe the present utility model in detail with reference to the accompanying drawings.

[0030] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0031] Embodiment 1

[0032] A cleaning device for a gravity separator, comprising a box body 1, a filter chamber 2 is provided in the box body 1, an opening 3 is provided at the top of the box body 1, a filter assembly 4 is provided in the filter chamber 2, the filter assembly 4 is connected to the box body 1, the filter assembly 4 divides the filter chamber 2 into a space before filtration 21 above and a space after filtration 22 below, and the opening 3 is communicated with the space before filtration 21;

[0033] An explosion-proof pump 5 is provided on the box body 1, the explosion-proof pump 5 is communicated with the space after filtration 22, and the explosion-proof pump 5 can be communicated with the maintenance port of the gravity separator through a pipeline.

[0034] By providing a filter assembly 4 in the box body 1, the filter assembly divides the filter chamber 2 into a space before filtration 21 and a space after filtration 22. When cleaning the inner cavity of the gravity separator, water carrying sediment enters the space before filtration 21 from the opening 3 at the top of the box body 1 and contacts the filter assembly 4. Under the action of gravity, the water passes through the filter assembly 4 and enters the space after filtration 22, while the sediment remains in the space before filtration 21 on the top side of the filter assembly 4; the explosion-proof pump 5 pumps out the water in the space after filtration 22, pressurizes it and discharges it into the inner cavity of the gravity separator to clean the inner cavity of the gravity separator, thereby realizing the recycling of water, saving resources, and the pressurized water can better clean the inner cavity of the gravity separator and speed up the cleaning speed of the inner cavity of the gravity separator; the water passing through the gravity separator has a certain pressure, which can more quickly flush the inner cavity of the gravity separator, shorten the sand cleaning time, improve the sand cleaning efficiency, and save production costs.

[0035] Specifically, the box body 1 is a rectangular box body 1.

[0036] Specifically, a lifting mechanism 6 is provided on the filtering component 4. One end of the lifting mechanism 6 is connected to the filtering component 4, and the other end extends out of the box body 1 from the opening 3. By providing the lifting mechanism 6 on the filtering component 4, an operator can take out the filtering component 4 from the opening 3 through the lifting mechanism 6. The lifting mechanism 6 is fixedly welded to the filtering component 4. The lifting mechanism 6 is an L-shaped structural member composed of a straight rod member 61 and a bent member 62. One end of the straight rod member 61 is hinged to the bent member 62, and the other end is welded to the filtering component 4. The bent member 62 can rotate relative to the straight rod member 61, enabling the bent member 62 to abut against the outer wall of the box body 1, thereby reducing the occupied space of the lifting mechanism 6.

[0037] Specifically, the filtering component 4 is composed of a groove structural member 41 and a filter net 42. A number of through filtering channels 43 are opened at the bottom of the groove of the groove structural member 41. The filter net 42 is laid flat at the bottom of the groove structural member 41, so that the filter net 42 blocks the filtering channels 43, allowing sediment impurities to remain in the pre-filter space 21, and water falling into the post-filter space 22 through the filter net 42 and the filtering channels 43 under the action of gravity. The side wall of the groove structural member 41 can prevent sediment from falling out of the groove structural member 41.

[0038] Specifically, a bracket 9 is provided on the side wall of the box body 1. An explosion-proof pump 5 and a control unit 10 are provided on the bracket 9. The explosion-proof pump 5 is connected to the control unit 10, making it difficult for the explosion-proof pump 5 and the control unit 10 to become loose from the box body 1. The control unit 10 can control the opening and closing of the explosion-proof pump 5.

[0039] Specifically, a support member 13 is provided in the filtering chamber 2. The support member 13 is connected to the box body 1. The support member 13 abuts against the bottom edge of the filtering component 4. The support member 13 is an annular protrusion provided on the side wall of the box body 1. The annular protrusion is located in the middle of the box body 1 in the vertical direction, making the filtering component 4 located in the middle of the box body 1, and there is a gap between the filtering component 4 and the bottom of the box body 1, ensuring that the post-filter space 22 has enough volume to accommodate water.

[0040] Specifically, four universal wheels are provided at the bottom of the box body 1 as guide wheels 11. The four universal wheels are distributed at the four corners of the bottom of the box body 1. A handrail 12 is provided on the side wall of the box body 1. An operator can control the movement of the box body 1 by pushing and pulling the handrail 12.

[0041] Specifically, the cleaning device for the gravity separator further includes a flushing pipeline 7. One end of the flushing pipeline 7 is communicated with the explosion-proof pump 5, and the other end is provided with a flange 8. The flange 8 can be cooperatively connected with the maintenance port of the gravity separator. The flushing pipeline 7 is a flexible pipeline.

[0042] A cleaning device for a gravity separator according to this embodiment, when cleaning the inner cavity of the gravity separator, first connect the maintenance port of the gravity separator through the flange 8, open the sewage outlet at the bottom of the liquid accumulation package, so that the sediment and water in the sewage outlet enter the box body 1 from the inlet. The sediment and water are separated in the box body 1, and the water enters the filtered space 22. The explosion-proof pump 5 extracts the water in the filtered space 22, pressurizes it and discharges it into the inner cavity of the gravity separator, so that the water carries the sediment and discharges from the sewage outlet at the bottom of the liquid accumulation package, thereby realizing the reuse of water, avoiding the waste of water resources. The water pressurized by the explosion-proof pump 5 has a higher flushing efficiency and saves costs.

[0043] Embodiment 2

[0044] A cleaning device for a gravity separator according to this embodiment has a structure substantially the same as that of Embodiment 1. Different from Embodiment 1, the flange 8 is provided with an extension pipe 14 for extending into the inner cavity of the gravity separator. The extension pipe 14 is communicated with the flushing pipeline 7, and a spray head 15 is arranged at the end of the extension pipe 14.

[0045] By increasing the flushing area, the cleaning speed of the inner cavity of the gravity separator is thus accelerated.

[0046] Embodiment 3

[0047] A cleaning device for a gravity separator according to this embodiment has a structure substantially the same as that of Embodiment 1. Different from Embodiment 1, a liquid collecting hopper is provided at the top of the box body 1. The liquid collecting hopper is a funnel-shaped structural member, and the liquid collecting hopper is communicated with the opening 3.

[0048] Specifically, the liquid collecting hopper is detachably connected to the same.

[0049] In some embodiments, the liquid collecting hopper is integrally formed with the box body 1, and the lowest part of the liquid collecting hopper is adaptively communicated with the opening 3.

[0050] By providing the liquid collecting hopper, the collection range of water and sediment is increased.

[0051] Embodiment 4

[0052] A cleaning device for a gravity separator according to this embodiment has a structure substantially the same as that of Embodiment 1. Different from Embodiment 1, the filtering component 4 is a partition board, and a filter screen 42 is laid flat on the partition board.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cleaning device for a gravity separator, characterized in that: The invention comprises a housing (1), wherein a filter chamber (2) is provided in the housing (1), an opening (3) is provided at the top of the housing (1), a filter assembly (4) is provided in the filter chamber (2), the filter assembly (4) is connected to the housing (1), the filter assembly (4) divides the filter chamber (2) into an upper pre-filtration space (21) and a lower post-filtration space (22), and the opening (3) is in communication with the pre-filtration space (21); The box body (1) is provided with an explosion-proof pump (5), the explosion-proof pump (5) is in communication with the post-filtration space (22), and the explosion-proof pump (5) can be in communication with a maintenance port of a gravity separator through a pipeline.

2. A cleaning device for a gravity separator according to claim 1, characterized in that: The filter assembly (4) is provided with a lifting mechanism (6), one end of the lifting mechanism (6) is connected to the filter assembly (4), and the other end thereof extends out of the box body (1) from the opening (3).

3. A cleaning device for a gravity separator as claimed in claim 2, characterized in that: The lifting mechanism (6) is an L-shaped structural member, comprising a straight rod member (61) and a bending member (62), one end of the straight rod member (61) being connected to the filter assembly (4) and the other end being hinged to the bending member (62).

4. A cleaning device for a gravity separator as claimed in claim 1, characterized in that: The filter assembly (4) comprises a groove structure (41) and a filter screen (42); a plurality of filter channels (43) passing through the groove bottom of the groove structure (41); and the filter screen (42) is arranged flat on the groove bottom.

5. A cleaning device for a gravity separator as claimed in claim 1, characterized in that: It also comprises a flushing pipeline (7), one end of which is in communication with the explosion-proof pump (5), and the other end of which is provided with a flange (8), and the flange (8) can be connected in cooperation with the maintenance port of the gravity separator.

6. A cleaning device for a gravity separator as claimed in claim 5, characterized in that: The flange (8) is provided with an extension pipe (14) for extending into the inner cavity of the gravity separator, the extension pipe (14) is connected to the flushing pipeline (7), and the extension pipe (14) is provided with a spray head (15).

7. A cleaning device for a gravity separator as claimed in claim 1, characterized in that: A liquid collecting hopper is provided on the top of the box body (1); the liquid collecting hopper is a funnel-shaped structural component; and the liquid collecting hopper is in communication with the opening (3).

8. A cleaning device for a gravity separator as claimed in claim 1, characterized in that: The box body (1) is provided with a bracket (9), the bracket (9) is provided with a control unit (10), the explosion-proof pump (5) is connected to the bracket (9), and the control unit (10) controls the connection with the explosion-proof pump (5).

9. A cleaning device for a gravity separator as claimed in claim 1, characterized in that: A support member (13) is provided in the filter cavity (2); the support member (13) is connected to the box body (1); and the support member (13) abuts against the filter assembly (4).

10. A cleaning device for a gravity separator according to any one of claims 1 to 9, characterized in that: A plurality of guide wheels (11) are arranged at the bottom of the box body (1), and a handrail (12) is arranged on the box body (1).

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