Coal bed gas well special anti-blocking filter screen pipe structure

Abstract

The utility model relates to the technical field of coal bed gas exploitation equipment, concretely relates to coal bed gas well row mining special anti -blocking formula filter screen pipe structure, including filter screen pipe main part, the bottom impurity collection cover of filter screen pipe main part's bottom is installed, and the bottom end of bottom impurity collection cover is connected with outside sludge pump through the impurity external discharge pipe, and the top of filter screen pipe main part is fixedly installed with upper support cover, and the central position department of upper support cover is fixedly installed with suction pipe, and the top flange connection of suction pipe has bellows flexible connection pipe, and the top flange connection of bellows flexible connection pipe has support disc, and the central position department flange connection of support disc has hard pipe, and a plurality of tension springs are arranged between upper support cover and support disc, and the top surface of upper support cover is detachably installed with left and right two symmetrical waterproof vibration motor. The utility model can make filter screen pipe have the effect of preventing from blocking, reach the effect that reduce screen pipe block probability, guarantee sustained row mining.

Description

Technical Field

[0001] This utility model relates to the technical field of coalbed methane extraction equipment, specifically to a special anti-clogging filter screen structure for coalbed methane well drainage. Background Technology

[0002] In the field of coalbed methane extraction, corresponding filter screens are commonly used. As the inlet of the water pump, the filter screen is often clogged by impurities during the pumping process due to its microporous tube structure. This affects the pumping efficiency and, in severe cases, can cause the filter screen to become clogged, preventing the surface pump from drawing water. Once this happens, production needs to be stopped for pump inspection, which not only consumes manpower, resources, and time but also causes reservoir damage to the coalbed methane well, affecting the gas production of a single well.

[0003] Utility model patent CN203808948U discloses a special anti-clogging filter screen pipe for coalbed methane well drainage. Its characteristic is that the pumping assembly, oil pipe, expansion joint assembly, and screen pipe assembly are connected sequentially from top to bottom, with the PE pipe located inside the oil pipe. This utility model has a simple structure, high reliability, and can effectively prevent screen pipe clogging, ensuring continuous and stable drainage operations in coalbed methane wells. It also prevents well shutdowns and pump inspections due to coal dust clogging, thereby effectively reducing costs and improving work efficiency.

[0004] While the aforementioned technical solutions offer the advantage of preventing screen blockage, they still have some shortcomings in filtration. For example, they can only shake off impurities clogging the screen through vibration, lacking the ability to promptly discharge the shaken-off impurities. Although the shaking process can alleviate screen blockage, subsequent suction operations cause the shaken-off impurities to re-adsorb onto the screen. Furthermore, with each shaking cycle, more impurities accumulate in the water, increasing the likelihood of screen blockage and affecting the effectiveness of the system. Therefore, we propose a dedicated anti-clogging filter screen structure for coalbed methane well drainage. Utility Model Content

[0005] The purpose of this utility model is to provide a special anti-clogging filter screen structure for coalbed methane well drainage, so as to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A special anti-clogging filter screen structure for coalbed methane well drainage includes a filter screen body. A bottom impurity collection hood is installed at the bottom of the filter screen body. The bottom end of the bottom impurity collection hood is connected to an external sludge pump via an impurity discharge pipe. An upper support cover is fixedly installed on the top of the filter screen body. A suction pipe is fixedly installed at the center of the upper support cover. A corrugated flexible connecting pipe is connected to the top flange of the suction pipe. A support plate is connected to the top flange of the corrugated flexible connecting pipe. A rigid pipe is connected to the center flange of the support plate. Multiple tension springs are provided between the upper support cover and the support plate. Two symmetrical waterproof vibration motors are detachably installed on the top surface of the upper support cover.

[0008] Preferably, the bottom impurity collection hood has a funnel-shaped structure, and the inner diameter of the impurity discharge pipe is between 5cm and 8cm;

[0009] This feature allows the bottom impurity collection hood to collect shaken-off impurities and discharge them externally through an external pump and impurity discharge pipe.

[0010] Preferably, multiple lifting rings are fixedly installed on the sides of the upper support cover and the support plate that are close to each other, and the two ends of the tension spring are engaged with the corresponding lifting rings.

[0011] Preferably, the number of tension springs is 4 to 8, and a waterproof protective cover for protecting the waterproof vibration motor inside is detachably installed on the top surface of the upper support cover.

[0012] Preferably, a fixing frame is fixedly installed on the shell of the waterproof protective cover, the fixing frame is detachably installed on the top surface of the upper support cover, and a sealing gasket is provided between the fixing frame and the upper support cover;

[0013] This feature facilitates the installation and removal of the waterproof protective cover, while the sealing gasket ensures a tight seal.

[0014] Preferably, a plurality of inner vertical beams are fixedly installed on the inner wall of the filter screen tube body, and the top ends of the inner vertical beams are fixedly installed on the bottom surface of the upper support cover;

[0015] This feature makes the filter screen tube structure more robust and stable, and less prone to deformation.

[0016] Preferably, a plurality of internal fixing rods are fixedly installed between the bottom end of the filter screen tube body and the inner wall of the bottom impurity collection cover, and the internal fixing rods are cylindrical.

[0017] This feature serves to secure the filter screen tube body to the bottom impurity collection hood.

[0018] Preferably, the lower projection of the filter screen body is located inside the lower projection of the bottom impurity collection hood, the rigid pipe is flange-connected to the corresponding external pipe, and a serrated mesh is fixedly installed on the inner wall of the bottom impurity collection hood.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model achieves timely collection and discharge of shaken impurities by setting a bottom impurity collection cover at the bottom of the filter screen tube body and an impurity discharge pipe connected to the bottom of the bottom impurity collection cover to an external sludge pump. The bottom impurity collection cover is funnel-shaped, which can quickly collect the impurities shaken off by the waterproof vibrating motor. Then, the impurity discharge pipe and the sludge pump work together to pump the impurities away from the well, avoiding the accumulation of impurities in the water and their re-adsorption on the screen tube, thereby reducing the probability of screen tube blockage and ensuring continuous discharge.

[0021] 2. This utility model achieves efficient anti-clogging and vibration adaptation through the waterproof vibration motor on the top support cover of the filter screen tube body, multiple tension springs between the upper support cover and the support plate, and the corrugated flexible connecting pipe between the suction pipe and the rigid pipe. The vibration generated by the waterproof vibration motor can quickly clean the impurities attached to the surface of the screen tube. The tension springs and the corrugated flexible connecting pipe buffer the vibration impact, avoid the rigid connection from loosening and leaking due to vibration, and at the same time ensure that the vibration is effectively transmitted to the screen tube body.

[0022] 3. This utility model achieves the stability and protection of the screen tube structure through multiple inner vertical beams on the inner wall of the filter screen tube body, multiple inner fixing rods between the bottom end of the filter screen tube body and the bottom impurity collection cover, and a sealing gasket between the waterproof protective cover and the upper support cover. The inner vertical beams enhance the deformation resistance of the screen tube body, the inner fixing rods reinforce the connection between the screen tube and the collection cover, and the sealing gasket ensures the waterproof sealing effect of the waterproof protective cover. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0025] Figure 3 This is the second partial structural schematic diagram of the present utility model;

[0026] Figure 4 This is a cross-sectional view of the bottom impurity collection hood of this utility model;

[0027] The meanings of the labels in the diagram are as follows:

[0028] 1. Filter screen tube body; 10. Upper support cover; 11. Suction pipe; 12. Corrugated flexible connecting pipe; 13. Support plate; 14. Rigid pipe; 15. Lifting ring; 16. Tension spring; 17. Inner vertical beam;

[0029] 2. Waterproof vibration motor; 20. Waterproof protective cover; 21. Fixing frame;

[0030] 3. Bottom impurity collection cover; 30. Inner fixing rod; 31. Impurity discharge pipe; 32. Serrated barrier net. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-4 This utility model provides a technical solution: a special anti-clogging filter screen pipe structure for coalbed methane well drainage, including a filter screen pipe body 1, a bottom impurity collection cover 3 installed at the bottom of the filter screen pipe body 1, the bottom end of the bottom impurity collection cover 3 connected to an external sludge pump through an impurity discharge pipe 31, an upper support cover 10 fixedly installed at the top of the filter screen pipe body 1, a suction pipe 11 fixedly installed at the center of the upper support cover 10, a corrugated flexible connecting pipe 12 connected to the top flange of the suction pipe 11, and the top flange of the corrugated flexible connecting pipe 12 connected to... A support plate 13 is connected, and a rigid pipe 14 is flanged at the center of the support plate 13. Multiple tension springs 16 are provided between the upper support cover 10 and the support plate 13. Two symmetrical waterproof vibration motors 2 are detachably installed on the top surface of the upper support cover 10. The waterproof vibration motors 2 vibrate to clean the impurities on the filter screen tube body 1. The impurity collection cover 3 at the bottom and the impurity discharge pipe 31 discharge the impurities. The corrugated flexible connecting pipe 12 is adapted to the vibration of the tension springs 16, which solves the problems of easy clogging and difficulty in discharging impurities in traditional screen tubes, and ensures the efficiency of discharge.

[0033] In this embodiment, the bottom impurity collection cover 3 has a funnel-shaped structure, and the inner diameter of the impurity discharge pipe 31 is between 5cm and 8cm. This allows the funnel-shaped bottom impurity collection cover 3 to quickly collect the impurities shaken off by the waterproof vibration motor 2, preventing the impurities from scattering. The impurity discharge pipe 31 with an inner diameter of 5cm to 8cm ensures that the impurities pass through smoothly. Together with the external sludge pump, the impurities are promptly pumped out of the well, preventing the impurities from being re-adsorbed into the filter screen body 1 and reducing the risk of blockage.

[0034] like Figure 2As shown, multiple lifting rings 15 are fixedly installed on the sides of the upper support cover 10 and the support plate 13 that are close to each other. The two ends of the tension spring 16 are locked onto the corresponding lifting rings 15, so that the tension spring 16 is stably connected to the upper support cover 10 and the support plate 13 through the lifting rings 15. At the same time, the lifting rings 15 provide a fixed force point for the tension spring 16, ensuring that the tension spring 16 evenly distributes the vibration and impact force and ensures the stability of the structure. The ends of the tension spring 16 are ring-shaped and fastened to the lifting rings 15, so that the tension spring 16 will not fall off the lifting rings 15.

[0035] Specifically, there are 4 to 8 tension springs 16. A waterproof protective cover 20 is detachably installed on the top surface of the upper support cover 10 to protect the waterproof vibratory motor 2 inside, so that the 4 to 8 tension springs 16 are evenly distributed, which enhances the connection stability between the upper support cover 10 and the support plate 13 and better buffers vibration. The waterproof protective cover 20 isolates moisture and impurities in the well, prevents the waterproof vibratory motor 2 from being corroded and damaged, and extends the service life of the motor. The waterproof protective cover 20 is provided with corresponding wiring holes for cables to pass through for wiring operations. The wiring holes and cables can be sealed with sealant to ensure sealing while allowing normal wiring operations.

[0036] Furthermore, a fixing frame 21 is fixedly installed on the housing of the waterproof protective cover 20. The fixing frame 21 is detachably installed on the top surface of the upper support cover 10 by multiple fastening screws. A sealing gasket is provided between the fixing frame 21 and the upper support cover 10, so that the waterproof protective cover 20 can be quickly installed and removed through the fixing frame 21, which is convenient for motor maintenance. The sealing gasket fills the gap between the fixing frame 21 and the upper support cover 10 to prevent underground moisture from seeping into the interior of the waterproof protective cover 20 and ensure the waterproof sealing effect.

[0037] In addition, multiple inner vertical beams 17 are fixedly installed on the inner wall of the filter screen tube body 1. The top of the inner vertical beams 17 is fixedly installed on the bottom surface of the upper support cover 10, so that the inner vertical beams 17 are connected to the upper support cover 10 from the inner wall of the filter screen tube body 1, thereby enhancing the filter screen tube body 1's resistance to bending and deformation.

[0038] like Figure 1 As shown, multiple inner fixing rods 30 are fixedly installed between the bottom end of the filter screen tube body 1 and the inner wall of the bottom impurity collection hood 3. The inner fixing rods 30 are cylindrical, which strengthen the connection between the filter screen tube body 1 and the bottom impurity collection hood 3, ensuring that the bottom impurity collection hood 3 accurately collects impurities.

[0039] It is worth noting that a serrated mesh 32 is fixedly installed on the inner wall of the bottom impurity collection hood 3. The cross-section of the serrated mesh 32 is serrated, which can increase the interception area. By setting the serrated mesh 32, larger impurities can be prevented from entering the impurity discharge pipe 31 and clogging the impurity discharge pipe 31.

[0040] It is worth noting that the lower projection of the filter screen tube body 1 is located inside the lower projection of the bottom impurity collection hood 3. The rigid tube 14 is connected to the corresponding external pipe with a flange, so that the impurities shaken off by the filter screen tube body 1 can fall into the bottom impurity collection hood 3 more effectively. The rigid tube 14 is securely connected to the external pipe through the flange, ensuring that the pipe can be connected normally. At the same time, the flange connection facilitates subsequent pipe maintenance and disassembly.

[0041] Finally, it should be noted that the waterproof vibration motor 2, the corresponding control system, and the external power supply involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching controller and power supply, are connected by wires. The specific connection method should refer to the working principle in this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0042] In use, the anti-clogging filter screen structure for coalbed methane well drainage of this utility model is as follows: a bottom impurity collection cover 3 is installed at the bottom of the filter screen body 1 and reinforced by an inner fixing rod 30; an upper support cover 10 is fixed at the top, and an inner vertical beam 17 is connected to the bottom surface of the upper support cover 10 to enhance stability; a suction pipe 11 is flanged to a corrugated flexible connecting pipe 12, which is then connected to a support plate 13 and a rigid pipe 14, with the rigid pipe 14 flanged to an external pipeline; 4 to 8 tension springs 16 are fastened to the lifting rings 15 of the upper support cover 10 and the support plate 13.

[0043] A waterproof vibration motor 2 is installed on the top surface of the upper support cover 10, and a waterproof protective cover 20 is fastened on it. When the motor is started, the vibration cleans the impurities that are blocked on the filter screen tube body 1. The impurities fall into the funnel-shaped bottom impurity collection cover 3. The impurity discharge pipe 31 is connected to an external sludge pump to remove the impurities, reducing the probability of subsequent blockage.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A special anti-clogging filter screen structure for coalbed methane well drainage, comprising a filter screen body (1), characterized in that: The bottom of the filter screen tube body (1) is equipped with a bottom impurity collection cover (3). The bottom end of the bottom impurity collection cover (3) is connected to an external sludge pump through an impurity discharge pipe (31). The top of the filter screen tube body (1) is fixedly equipped with an upper support cover (10). A suction pipe (11) is fixedly installed at the center of the upper support cover (10). A corrugated flexible connecting pipe (12) is connected to the top flange of the suction pipe (11). A support plate (13) is connected to the top flange of the corrugated flexible connecting pipe (12). A rigid pipe (14) is connected to the center flange of the support plate (13). Multiple tension springs (16) are provided between the upper support cover (10) and the support plate (13). Two waterproof vibration motors (2) that are symmetrically mounted on the top surface of the upper support cover (10) are detachably installed.

2. The anti-clogging filter screen structure for coalbed methane well drainage as described in claim 1, characterized in that: The bottom impurity collection cover (3) has a funnel-shaped structure, and the inner diameter of the impurity discharge pipe (31) is between 5cm and 8cm.

3. The anti-clogging filter screen structure for coalbed methane well drainage as described in claim 1, characterized in that: Multiple lifting rings (15) are fixedly installed on the sides of the upper support cover (10) and the support plate (13) that are close to each other, and the two ends of the tension spring (16) are locked on the corresponding lifting rings (15).

4. The anti-clogging filter screen structure for coalbed methane well drainage as described in claim 3, characterized in that: The number of tension springs (16) is 4 to 8, and a waterproof protective cover (20) for protecting the waterproof vibration motor (2) inside is detachably installed on the top surface of the upper support cover (10).

5. The anti-clogging filter screen structure for coalbed methane well drainage as described in claim 4, characterized in that: A fixing frame (21) is fixedly installed on the shell of the waterproof protective cover (20). The fixing frame (21) is detachably installed on the top surface of the upper support cover (10). A sealing gasket is provided between the fixing frame (21) and the upper support cover (10).

6. The anti-clogging filter screen structure for coalbed methane well drainage according to claim 1, characterized in that: Multiple inner vertical beams (17) are fixedly installed on the inner wall of the filter screen tube body (1), and the top of the inner vertical beams (17) is fixedly installed on the bottom surface of the upper support cover (10).

7. The anti-clogging filter screen structure for coalbed methane well drainage as described in claim 1, characterized in that: Multiple inner fixing rods (30) are fixedly installed between the bottom end of the filter screen tube body (1) and the inner wall of the bottom impurity collection cover (3). The inner fixing rods (30) are cylindrical.

8. The anti-clogging filter screen structure for coalbed methane well drainage as described in claim 1, characterized in that: The lower projection of the filter screen tube body (1) is located inside the lower projection of the bottom impurity collection hood (3). The rigid tube (14) is connected to the corresponding external pipe by a flange. A serrated mesh (32) is fixedly installed on the inner wall of the bottom impurity collection hood (3).

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