Sand prevention and removal device for natural gas exploitation

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By introducing vibration sedimentation, sand removal, and cleaning mechanisms into the sand control and desanding device for natural gas extraction, the problems of wear and clogging of existing sand desanders have been solved, resulting in extended equipment life and improved filtration efficiency.

CN223594163UActive Publication Date: 2025-11-25CHENGDU ROCK PRECISION MFG

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Patent Information

Application Number: CN202520129544.1
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-01-20
Publication Date: 2025-11-25
Estimated Expiration: 2035-01-20

AI Technical Summary

Technical Problem

Existing natural gas extraction desanders suffer severe wear during the sand and gravel filtration process, resulting in reduced equipment lifespan and easy clogging of the filter screen, increasing maintenance costs and labor hours.

Method used

A sand removal and sand control device for natural gas extraction was designed, comprising a vibrating plate, a sand removal mechanism, a cleaning mechanism, and a reflux mechanism. The device uses vibration to settle sediment and preliminarily filter natural gas, reducing the load on the sand remover. The cleaning mechanism prevents clogging, and the reflux mechanism reduces natural gas waste.

Benefits of technology

It extends the service life of equipment, reduces maintenance and replacement costs, increases natural gas production and filtration efficiency, and reduces natural gas loss.

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Abstract

The utility model discloses a sand prevention and removal device for natural gas exploitation, which comprises a tank body, a vibration disc used for quickly precipitating silt in the tank body is arranged at the bottom of the tank body, and a sand removal mechanism used for carrying out primary sand prevention and sand removal on natural gas and reducing the load of an existing natural gas sand remover is arranged in the tank body. A gas inlet mechanism used for being communicated with untreated natural gas is arranged at one end of the tank body, and a gas outlet mechanism used for discharging filtered natural gas and communicated with a gas inlet pipe of an existing sand remover is arranged at the end, away from the gas inlet mechanism, of the tank body; according to the utility model, primary gravel filtration of natural gas is realized through the arrangement of the desanding mechanism, and the cleaning of the desanding mechanism is realized through the arrangement of the cleaning mechanism, so that the reduction of the filtration effect caused by blockage of the desanding mechanism is prevented; by arranging the backflow mechanism, the unfiltered natural gas in the tank body is conveyed to the gas inlet pipe again to be filtered again, and loss is reduced.

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Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas exploitation technical field, concretely is a kind of natural gas exploitation sand prevention and sand removal device. BACKGROUND

[0002] Natural gas exploitation sand prevention and sand removal device refers to the equipment for separating and removing impurities such as sand particles from the natural gas exploitation process. The main purpose of these devices is to prevent downhole impurities such as sand, mud, stones and other impurities from entering the gas conveying pipeline along with the gas, causing pipeline blockage, gas discharge difficulty, pipeline inner wall wear and tear, and reducing natural gas purity and quality problems.

[0003] The existing natural gas exploitation sand remover has large wear on the equipment during the process of filtering sand and gravel, which reduces the service life of the equipment. At the same time, sand and gravel can cause the filter screen to be blocked during the filtering process, which not only increases the working hours but also increases the maintenance cost of the equipment. Therefore, we need to propose a natural gas exploitation sand prevention and sand removal device. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of natural gas exploitation sand prevention and sand removal device, with the advantage that the existing natural gas exploitation sand remover reduces load, to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of natural gas exploitation sand prevention and sand removal device, including tank body, the bottom of the tank body is provided with vibration disc for the quick sedimentation of silt in tank body, the inside of the tank body is provided with sand removal mechanism for carrying out preliminary sand prevention and sand removal to natural gas, reduce the load of existing natural gas sand remover, one end of the tank body is provided with air inlet mechanism for communicating untreated natural gas, the end of the tank body away from air inlet mechanism is provided with air outlet mechanism for discharging filtered natural gas, and communicating existing sand remover;

[0006] Both ends of the tank body are provided with cleaning mechanism for cleaning silt in the tank body, one end of the tank body close to air inlet mechanism is provided with reflux mechanism for refluxing residual natural gas during cleaning process.

[0007] Preferably, the sand removal mechanism includes a baffle, the baffle is arranged in the interior of the tank body, the baffle is arranged in a funnel shape, the side of the baffle close to the inner wall of the tank body is provided with a filter hole, and the filter hole penetrates the baffle.

[0008] Preferably, the air inlet mechanism comprises an air inlet pipe arranged at one end of the tank body, a first flexible straight pipe arranged at the end of the air inlet pipe away from the tank body, a first one-way valve arranged at the end of the first flexible straight pipe away from the air inlet pipe, a first pipeline arranged at the end of the first one-way valve away from the first flexible straight pipe, and a first flange arranged at the end of the first pipeline away from the first one-way valve.

[0009] Preferably, the air outlet mechanism comprises an air outlet pipe arranged at the end of the tank body away from the air inlet pipe, a second flexible straight pipe arranged at the end of the air outlet pipe away from the tank body, a second one-way valve arranged at the end of the second flexible straight pipe away from the air outlet pipe, a second pipeline arranged at the end of the second one-way valve away from the second flexible straight pipe, and a second flange arranged at the end of the second pipeline away from the second one-way valve.

[0010] Preferably, the cleaning mechanism comprises a water inlet pipe arranged at one end of the tank body, a third one-way valve arranged at the end of the water inlet pipe away from the tank body, a third pipeline arranged at the end of the third one-way valve away from the water inlet pipe, a third flange arranged at the end of the third pipeline away from the second one-way valve, and a water outlet mechanism arranged at the side of the tank body away from the water inlet pipe for discharging water after cleaning.

[0011] Preferably, the water outlet mechanism comprises a water outlet pipe arranged at the end of the tank body away from the water inlet pipe, a first valve arranged on the surface of the water outlet pipe, and a fourth flange arranged at the side of the water outlet pipe away from the tank body.

[0012] Preferably, the backflow mechanism comprises a backflow pipe arranged at the end of the tank body close to the air inlet pipe, a second valve arranged on the surface of the backflow pipe, a fourth one-way valve arranged at the end of the backflow pipe away from the tank body, a fourth pipeline arranged at the side of the fourth one-way valve away from the backflow pipe, and the fourth pipeline is communicated with the first pipeline.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1、The utility model discloses a sand removing mechanism is arranged to realize the preliminary gravel filtration of natural gas, a cleaning mechanism is arranged to realize the cleaning of the sand removing mechanism and prevent the sand removing mechanism from being blocked to reduce the filtration effect, and a backflow mechanism is arranged to retransport the natural gas not filtered in the tank body to the air inlet pipe to filter again and reduce the loss.

[0015] 2、The utility model discloses a sand removing mechanism is arranged to realize the preliminary gravel filtration of natural gas, a cleaning mechanism is arranged to realize the cleaning of the sand removing mechanism and prevent the sand removing mechanism from being blocked to reduce the filtration effect, and a backflow mechanism is arranged to retransport the natural gas not filtered in the tank body to the air inlet pipe to filter again and reduce the loss. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a structure schematic view

[0017] Figure 2 The utility model discloses a structure schematic view Figure 1 The utility model discloses a structure schematic view

[0018] Figure 3 The utility model discloses a structure schematic view

[0019] Figure 4 The utility model discloses a structure schematic view Figure 3 The utility model discloses a structure schematic view

[0020] In the drawing: 1, tank body, 2, vibration disc, 3, baffle, 4, filter hole, 5, air inlet pipe, 6, first flexible straight-through, 7, first check valve, 8, first pipeline, 9, first flange, 10, air outlet pipe, 11, second flexible straight-through, 12, second check valve, 13, second pipeline, 14, second flange, 15, water inlet pipe, 16, third check valve, 17, fourth flange, 18, water outlet pipe, 19, first valve, 20, third flange, 21, backflow pipe, 22, second valve, 23, fourth check valve, 24, fourth pipeline, 25, third pipeline. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a natural gas exploitation sand prevention and sand removal device, including tank body 1, the bottom of tank body 1 is provided with vibration disc 2 for the quick sedimentation of silt in tank body 1, the inside of tank body 1 is provided with sand removal mechanism for carrying out preliminary sand prevention and sand removal to natural gas and reducing the load of existing natural gas sand remover.Sand removal mechanism includes baffle 3, baffle 3 is arranged in the inside of tank body 1, baffle 3 is funnel-shaped arrangement, baffle 3 is close to the side of inner wall of tank body 1 and is provided with filter hole 4, filter hole 4 penetrates baffle 3.

[0023] One end of tank body 1 is provided with air inlet mechanism for communicating untreated natural gas.Air inlet mechanism includes air inlet pipe 5, air inlet pipe 5 is arranged in one end of tank body 1, air inlet pipe 5 is provided with first flexible straight-through 6 away from one end of tank body 1, first flexible straight-through 6 is provided with first check valve 7 away from one end of air inlet pipe 5, first check valve 7 is provided with first pipeline 8 away from one end of first flexible straight-through 6, first pipeline 8 is provided with first flange 9 away from one end of first check valve 7.

[0024] The end of the tank 1 away from the air inlet mechanism is provided with an air outlet mechanism for discharging filtered natural gas and communicating with the existing desander. The air outlet mechanism comprises an air outlet pipe 10 provided at the end of the tank 1 away from the air inlet pipe 5, and the end of the air outlet pipe 10 away from the tank 1 is provided with a second flexible straight pipe 11, the end of the second flexible straight pipe 11 away from the air outlet pipe 10 is provided with a second one-way valve 12, the end of the second one-way valve 12 away from the second flexible straight pipe 11 is provided with a second pipe 13, and the end of the second pipe 13 away from the second one-way valve 12 is provided with a second flange plate 14.

[0025] The end of the tank 1 is provided with a cleaning mechanism for cleaning the sand in the tank 1. The cleaning mechanism comprises a water inlet pipe 15 provided at one end of the tank 1, and the end of the water inlet pipe 15 away from the tank 1 is provided with a third one-way valve 16, the end of the third one-way valve 16 away from the water inlet pipe 15 is provided with a third pipe 25, the end of the third pipe 25 away from the second one-way valve 12 is provided with a third flange plate 20, and the side of the tank 1 away from the water inlet pipe 15 is provided with a water outlet mechanism for discharging water after cleaning. The water outlet mechanism comprises a water outlet pipe 18 provided at the end of the tank 1 away from the water inlet pipe 15, and the surface of the water outlet pipe 18 is provided with a first valve 19, and the side of the water outlet pipe 18 away from the tank 1 is provided with a fourth flange plate 17.

[0026] The end of the tank 1 close to the air inlet mechanism is provided with a backflow mechanism for backflow of residual natural gas during the cleaning process. The backflow mechanism comprises a backflow pipe 21 provided at the end of the tank 1 close to the air inlet pipe 5, and the surface of the backflow pipe 21 is provided with a second valve 22, and the end of the backflow pipe 21 away from the tank 1 is provided with a fourth one-way valve 23, and the side of the fourth one-way valve 23 away from the backflow pipe 21 is provided with a fourth pipe 24, and the fourth pipe 24 communicates with the first pipe 8.

[0027] The working principle is as follows:

[0028] The first flange plate 9 is connected to the discharge pipe of the natural gas mining equipment through a metal hose, and the vibration disc 2 below the tank 1 is opened. The natural gas enters the first one-way valve 7 through the first pipe 8, and the input end of the first one-way valve 7 is close to the first pipe 8. The natural gas reaches the first flexible straight pipe 6 through the first one-way valve 7, and the rubber part of the first flexible straight pipe 6 can buffer part of the power generated by the vibration disc 2 of the tank 1. The natural gas enters the air inlet pipe 5 through the first flexible straight pipe 6 and is delivered to the tank 1.

[0029] Arrive baffle 3, because baffle 3 is funnel design most natural gas will spread to the four corners by filter hole 4, a small part by the middle. Because the density of the sand is greater than that of natural gas, the sand will sediment, also a part of the sand flow with the flow of natural gas, using vibration disc 2 vibration breaks the flow direction of natural gas, make natural gas show irregular flow, accelerate the sedimentation of sand. Tank 1 is provided with several baffle 3, its baffle 3 on the filter hole 4 diameter size arrangement is gradually reduced from the inlet pipe 5 to the outlet pipe 10. Can realize in turn filtering.

[0030] Natural gas filter is completed by the outlet pipe 10, to the second flexible straight through 11. The second flexible straight through 11 is also used to buffer the vibration of vibration disc 2. Natural gas through the second flexible straight through 11 to the second one-way valve 12, the input end of the second one-way valve 12 is close to the second flexible straight through 11. Natural gas through the second one-way valve 12 to the second pipeline 13, the second flange plate 14 through the metal hose connected with the existing natural gas exploitation sand remover, the working principle of the existing sand remover is based on the principle of centrifugal sedimentation and density difference. Make natural gas first through the new device for the first step of filtration, filter most of the sand. Reduce the load of the existing sand remover, increase the service life. At the same time, the sand remover does not need to filter too much sand, accelerates the sand removal speed, improves the yield of finished natural gas.

[0031] The process of cleaning mechanism is: the third flange plate 20 through the hose connected with the output end of the water pump, the pure water is pumped into the tank 1 through the third pipeline 25 to the third one-way valve 16, the input end of the third one-way valve 16 is close to the third pipeline 25. The pure water flows into the water inlet pipe 15 through the third one-way valve 16 and then reaches the tank 1, which is opposite to the direction of sand flushing by natural gas. The tank 1 is provided with a liquid level sensor, when the pure water reaches one third of the tank 1, the first valve 19 is opened, and the water after cleaning is discharged from the water outlet pipe 18. Until the water discharged is clear, the water pump is closed. When the water level is just submerged over the water outlet pipe 18, the first valve 19 is closed, in preparation for the next filtration of natural gas.

[0032] Because the density of the residual natural gas is not greater than that of the pure water, the natural gas will gather in the upper part of the tank 1, and the second valve 22 is opened. The residual natural gas will enter the first pipeline 8 through the return pipe 21, the fourth one-way valve 23 and the fourth pipeline 24. When the water in the tank 1 reaches the return pipe 21, the second valve 22 is closed. Because the internal pressure of the tank 1 is relatively large due to the pure water, the pure water can only flow to the first flexible straight through 6, but because of the setting of the first one-way valve 7, the pure water cannot flow to the first pipeline 8. The backflow of natural gas in the first pipeline 8 cannot flow into the tank 1 due to the pressure difference. In the next filtration of natural gas, because the pure water in the tank 1 is emptied, the pressure in the tank 1 is reduced, and the previously backflowing natural gas can pass through the first one-way valve 7. The purpose of reducing the waste of natural gas is achieved.

[0033] It is worth supplementing that: the flexible through is a kind of pipe connecting piece, mainly used in pipeline system, allowing pipeline to displace or deform to a certain extent when subjected to external load, thereby absorbing or relieving stress, adapting to various external environmental changes. The flexible through is usually made of flexible materials such as rubber, plastic and the like, and has good elasticity and sealing performance.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sand control and removal device for natural gas production, comprising a tank body (1), characterized in that: The bottom of the tank body (1) is provided with a vibrating disc (2) for rapid sedimentation of the sediment in the tank body (1), the inside of the tank body (1) is provided with a sand removal mechanism for preliminary sand removal of natural gas to reduce the load of the existing natural gas sand remover, one end of the tank body (1) is provided with an air inlet mechanism for communicating with untreated natural gas, and the other end of the tank body (1) is provided with an air outlet mechanism for discharging filtered natural gas and communicating with the existing sand remover. Both ends of the tank body (1) are provided with a cleaning mechanism for cleaning the sediment in the tank body (1), and one end of the tank body (1) close to the air inlet mechanism is provided with a backflow mechanism for backflow of residual natural gas during the cleaning process.

2. The sand control and removal device for natural gas exploitation according to claim 1, characterized in that: The sand removal mechanism comprises a baffle (3), the baffle (3) is arranged in the tank body (1), the baffle (3) is arranged in a funnel shape, the baffle (3) is provided with a filter hole (4) on the side close to the inner wall of the tank body (1), and the filter hole (4) penetrates the baffle (3).

3. The sand control and removal device for natural gas exploitation according to claim 1, characterized in that: The air inlet mechanism comprises an air inlet pipe (5), the air inlet pipe (5) is arranged at one end of the tank body (1), the air inlet pipe (5) is provided with a first flexible straight pipe (6) away from the tank body (1), the first flexible straight pipe (6) is provided with a first one-way valve (7) away from the air inlet pipe (5), the first one-way valve (7) is provided with a first pipeline (8) away from the first flexible straight pipe (6), and the first pipeline (8) is provided with a first flange (9) away from the first one-way valve (7).

4. The apparatus for sand control and removal in natural gas production according to claim 1, wherein: The air outlet mechanism comprises an air outlet pipe (10), the air outlet pipe (10) is arranged at the end of the tank body (1) away from the air inlet pipe (5), the air outlet pipe (10) is provided with a second flexible straight pipe (11) away from the tank body (1), the second flexible straight pipe (11) is provided with a second one-way valve (12) away from the air outlet pipe (10), the second one-way valve (12) is provided with a second pipeline (13) away from the second flexible straight pipe (11), and the second pipeline (13) is provided with a second flange (14) away from the second one-way valve (12).

5. The apparatus for sand control and sand removal in natural gas exploitation according to claim 1, characterized in that: The cleaning mechanism comprises a water inlet pipe (15), the water inlet pipe (15) is arranged at one end of the tank body (1), the water inlet pipe (15) is provided with a third one-way valve (16) away from the tank body (1), the third one-way valve (16) is provided with a third pipeline (25) away from the water inlet pipe (15), the third pipeline (25) is provided with a third flange (20) away from the second one-way valve (12), and the tank body (1) is provided with a water outlet mechanism for discharging water after cleaning away from one side of the water inlet pipe (15).

6. A sand control and removal apparatus for natural gas production as claimed in claim 5 wherein: The water outlet mechanism comprises a water outlet pipe (18), the water outlet pipe (18) is arranged at the end of the tank body (1) away from the water inlet pipe (15), the surface of the water outlet pipe (18) is provided with a first valve (19), and the side of the water outlet pipe (18) away from the tank body (1) is provided with a fourth flange (17).

7. A sand control and removal apparatus for natural gas production as claimed in claim 6 wherein: The backflow mechanism comprises a backflow pipe (21), which is arranged at one end of the tank body (1) close to the air inlet pipe (5), the surface of the backflow pipe (21) is provided with a second valve (22), one end of the backflow pipe (21) away from the tank body (1) is provided with a fourth one-way valve (23), one side of the fourth one-way valve (23) away from the backflow pipe (21) is provided with a fourth pipeline (24), and the fourth pipeline (24) communicates with the first pipeline (8).