Wall protection slurry circulating device for drilling

Abstract

The utility model discloses a wall protection slurry circulating device for drilling, which belongs to the technical field of slurry circulating treatment and comprises a filter component, the filter component comprises a first filter box, a flow guide box is connected below the first filter box, and a second filter box is connected below the flow guide box; the discharging assemblies are symmetrically distributed on the two sides of the first filtering box and the two sides of the second filtering box, and the discharging assemblies are used for discharging filtered impurities; the first filter screen is fixedly connected to the inner wall of the first filter box, and the second filter screen is fixedly connected to the inner wall of the second filter box. Through the arrangement of the flow guide type filter screen, the slurry is filtered, and the slurry is fully filtered in cooperation with guide buffering of the flow guide plate and the material collecting plate, so that impurities in the slurry are effectively removed, and the high efficiency of slurry recycling is improved.

Description

Technical Field

[0001] This utility model relates to the field of mud circulation treatment technology, specifically a drilling mud circulation device for borehole wall protection. Background Technology

[0002] Drilling mud is a mixture of water, bentonite, and additives. During the construction of bored piles, the pressure difference between the mud and groundwater is used to control the water pressure during mud circulation. This allows the mud to form a mud cake on the borehole wall, reinforcing the borehole wall and preventing collapse. At the same time, it stabilizes the water level in the borehole. In addition, the mud also carries out rock and soil debris, cools and lubricates the drill bit. The mud circulation device includes a filtration system to filter impurities from the circulating mud.

[0003] An investigation revealed a utility model patent (publication number: CN217809150U) disclosing a mud circulation treatment device. The device includes a base plate, with two support blocks fixedly connected to the top of the base plate. A housing is fixedly connected to the top of the two support blocks. A limiting mechanism and an adjusting assembly are provided on the top of the base plate. The limiting mechanism includes a filter box fixedly connected to the top of the base plate. Limiting blocks are fixedly connected to both the left and right sides of the inner wall of the filter box. A first filter plate is mounted on the top of the two limiting blocks. A chamber is fixedly connected to the right side of the filter box. This mud circulation treatment device, by incorporating the limiting mechanism, provides a limiting function, effectively limiting the position of the first filter plate. This facilitates the installation and removal of the first filter plate, improving work efficiency, enhancing user convenience, and increasing the practicality of the treatment device.

[0004] The aforementioned patent uses two filter plates of different sizes to filter mud, remove impurities from the mud, and improve the quality of mud recycling. However, the impurities filtered out cannot be quickly filtered, collected, and discharged, thus affecting the continuous filtration of mud and making it inconvenient for long-term recycling of the equipment. A large amount of filter material residue will remain on the surface of the filter plate, thereby reducing its subsequent filtration effect.

[0005] Therefore, this utility model provides a drilling mud circulation device to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This invention provides a drilling mud circulation device for borehole wall protection, which aims to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a drilling mud circulation device, comprising a filter assembly, wherein the filter assembly comprises a first filter box, and a flow guide box is connected below the first filter box, and a second filter box is connected below the flow guide box.

[0010] The discharge assembly is symmetrically distributed on both sides of the first filter box and the second filter box, and the discharge assembly is used to filter out impurities.

[0011] A first filter screen and a second filter screen are fixedly connected to the inner wall of a first filter box, and the second filter screen is fixedly connected to the inner wall of a second filter box. Baffles are fixedly connected to both the upper sides of the first and second filter screens. The first and second filter screens are used for graded filtration of mud.

[0012] As a preferred technical solution of this application, support legs are fixedly connected to the corners of both the first and second filter boxes, and a feed pipe is fixedly connected to the top center of the support legs, while a discharge pipe is fixedly connected to the bottom outer side of the second filter box.

[0013] As a preferred technical solution of this application, the discharge assembly includes a conveying pipe, which is fixedly connected to both sides of the first filter box and the second filter box. A servo motor is fixedly connected to one end of the conveying pipe, and an auger is fixedly connected to the output end of the servo motor. The two ends of the auger are rotatably connected to the inside of the conveying pipe through bearings. A discharge pipe is provided at the bottom of one end of the conveying pipe.

[0014] As a preferred technical solution of this application, the discharge assembly is provided in four sets, and the two sets of discharge assemblies are symmetrically distributed. A synchronous belt drive mechanism is connected between the two sets of discharge assemblies. The two ends of the synchronous belt drive mechanism are respectively connected to the shaft of the auger, and the synchronous belt drive mechanism is used for synchronous transmission of the two sets of discharge assemblies.

[0015] As a preferred technical solution of this application, the first filter box and the second filter box are provided with discharge ports at the lowest points of the first filter screen and the second filter screen, and the discharge ports are fixedly connected to the inlet of the conveying pipe.

[0016] As a preferred technical solution of this application, the cross-sections of the first filter screen and the second filter screen are both in the shape of a "∧" shape, and the pore size of the first filter screen is larger than that of the second filter screen.

[0017] As a preferred technical solution of this application, both sides of the upper surface of the first filter screen and the second filter screen are fixedly connected with guide plates and collecting plates. The collecting plates are symmetrically distributed on both sides of the guide plates, and two collecting plates are provided on both sides of each guide plate. The guide plates have a symmetrical obtuse angle structure.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this application are as follows:

[0020] 1. This utility model achieves slurry filtration through the design of a flow-guided filter screen. Combined with the guiding and buffering functions of the guide plate and the collection plate, the slurry is fully filtered, thereby effectively removing impurities from the slurry and improving the efficiency of slurry recycling. Furthermore, the flow-guided structure effectively avoids the accumulation and clogging of impurities, improving the filter screen's filtration durability and filtration effect.

[0021] 2. By setting up a discharge component, this utility model can centrally collect and discharge the impurities filtered by the first and second filter screens, which facilitates the cleaning of impurities and improves the durability of the filtration of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the first and second filter boxes of this utility model.

[0024] Figure 3 This is a schematic diagram showing the internal component distribution structure of the first and second filter boxes of this utility model.

[0025] Figure 4 This is a schematic diagram of the overall structure of the first and second filter screens of this utility model.

[0026] In the picture:

[0027] 1. Filter assembly; 11. Support leg; 12. First filter box; 13. Flow guide box; 14. Second filter box; 15. Discharge pipe; 16. Inlet pipe; 2. Discharge assembly; 21. Conveying pipe; 22. Servo motor; 23. Screwdriver; 24. Discharge pipe; 3. Synchronous belt drive mechanism; 4. First filter screen; 5. Second filter screen; 6. Baffle; 61. Flow guide plate; 62. Collecting plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0029] like Figure 1-4As shown, this utility model provides a drilling mud circulation device, including a filter assembly 1, which includes a first filter box 12, with a guide box 13 connected below the first filter box 12 and a second filter box 14 connected below the guide box 13; a discharge assembly 2, which is symmetrically distributed on both sides of the first filter box 12 and the second filter box 14, and is used to discharge filtered impurities; a first filter screen 4 and a second filter screen 5, with the first filter screen 4 fixedly connected to the inner wall of the first filter box 12 and the second filter screen 5 fixedly connected to the inner wall of the second filter box 14, and baffles 6 fixedly connected to both sides above the first filter screen 4 and the second filter screen 5, which are used for graded filtration of mud. Through the arrangement of the first filter box 12 and the second filter box 14, and the arrangement of the first filter screen 4 and the second filter screen 5 inside, multi-stage filtration of mud is achieved, effectively removing impurities from the mud.

[0030] Furthermore, support legs 11 are fixedly connected to the corners of both the first filter box 12 and the second filter box 14. A feed pipe 16 is fixedly connected to the top center of the support leg 11, and a discharge pipe 15 is fixedly connected to the bottom outer side of the second filter box 14. The slurry enters the interior of the first filter box 12 through the feed pipe 16. First, the slurry is coarsely filtered inside the first filter box 12. Then, it is guided by the guide box 13 to the interior of the second filter box 14 for fine filtration. This removes impurities from the slurry and improves the efficiency of slurry recycling.

[0031] Furthermore, the discharge assembly 2 includes a conveying pipe 21, which is fixedly connected to both sides of the first filter box 12 and the second filter box 14. A servo motor 22 is fixedly connected to one end of the conveying pipe 21, and an auger 23 is fixedly connected to the output end of the servo motor 22. Both ends of the auger 23 are rotatably connected to the inside of the conveying pipe 21 through bearings. A discharge pipe 24 is provided at the bottom of one end of the conveying pipe 21. The discharge assembly 2 is provided in four sets, and the two sets of discharge assemblies 2 are symmetrically distributed. A synchronous belt drive mechanism 3 is connected between the two sets of discharge assemblies 2. The two ends of the synchronous belt drive mechanism 3 are respectively connected to the shaft of the auger 23. The components are interconnected, and the synchronous belt drive mechanism 3 is used for the synchronous transmission of the two sets of discharge components 2. With the setting of this structure, the impurities filtered by the first filter screen 4 and the second filter screen 5 flow into the interior of the conveying pipe 21. Under the drive of the servo motor 22, the auger 23 is driven to rotate, so that the impurities inside the conveying pipe 21 can be rotated and conveyed, improving the convenience of impurity collection. The first filter box 12 and the second filter box 14 are provided with discharge ports at the lowest points of the first filter screen 4 and the second filter screen 5, and the discharge ports are fixedly connected to the inlet of the conveying pipe 21.

[0032] Furthermore, the cross-sections of the first filter screen 4 and the second filter screen 5 are both in the shape of a "∧". The aperture of the first filter screen 4 is larger than that of the second filter screen 5. Through the special cross-sections of the first filter screen 4 and the second filter screen 5, the mud is guided to both sides, and impurities are filtered while the mud flows to both sides. The mud is collected by passing through the first filter screen 4 and the second filter screen 5, which facilitates its recycling.

[0033] Furthermore, guide plates 61 and collecting plates 62 are fixedly connected to both sides of the upper surface of the first filter screen 4 and the second filter screen 5. The collecting plates 62 are symmetrically distributed on both sides of the guide plates 61, and two collecting plates 62 are provided on both sides of each guide plate 61. The guide plates 61 have a symmetrical obtuse angle structure. Through the arrangement of the guide plates 61 and the collecting plates 62, the mud flowing on both sides is buffered and guided, thereby ensuring the slurry filtration is sufficient and avoiding the mud flow velocity being too high, which would cause the liquid mud to enter the interior of the conveying pipe 21. This ensures that the liquid mud can completely penetrate in the area of ​​the first filter screen 4 and the second filter screen 5. Moreover, the impurities, in the process of flow, cooperate with the buffering and guiding of the guide plates 61 and the collecting plates 62 to be fully filtered and further flow into the interior of the conveying pipe 21 for collection.

[0034] Working principle: First, the slurry is drawn out through an external pipe connected to the feed pipe 16 via a circulating pump and enters the interior of the first filter box 12. The slurry is coarsely filtered by the first filter screen 4. The filtered slurry is then guided to the interior of the second filter box 14 for secondary filtration, which removes impurities from the slurry. The filtered impurities are then guided into the interior of the conveying pipe 21 by the first filter screen 4 and the second filter screen 5. With the rotation drive of the auger 23, the impurities can be quickly discharged, thereby improving the durability of the filtration of the device.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A drilling mud circulation device, characterized in that: The filter assembly (1) includes a first filter box (12), and a flow guide box (13) is connected below the first filter box (12), and a second filter box (14) is connected below the flow guide box (13). Discharge assembly (2), the discharge assembly (2) is symmetrically distributed on both sides of the first filter box (12) and the second filter box (14), and the discharge assembly (2) is used to filter out impurities; The first filter screen (4) and the second filter screen (5) are fixedly connected to the inner wall of the first filter box (12) and the second filter screen (5) are fixedly connected to the inner wall of the second filter box (14). Baffles (6) are fixedly connected to both sides above the first filter screen (4) and the second filter screen (5). The first filter screen (4) and the second filter screen (5) are used for graded filtration of mud.

2. The drilling mud circulation device according to claim 1, characterized in that: The first filter box (12) and the second filter box (14) are both fixedly connected to the corners of the support legs (11), the top center of the support legs (11) is fixedly connected to the feed pipe (16), and the bottom outer side of the second filter box (14) is fixedly connected to the discharge pipe (15).

3. A drilling mud circulation device according to claim 2, characterized in that: The discharge assembly (2) includes a conveying pipe (21), which is fixedly connected to both sides of the first filter box (12) and the second filter box (14). A servo motor (22) is fixedly connected to one end of the conveying pipe (21), and an auger (23) is fixedly connected to the output end of the servo motor (22). The two ends of the auger (23) are rotatably connected to the inside of the conveying pipe (21) through bearings. A discharge pipe (24) is provided at the bottom of one end of the conveying pipe (21).

4. A drilling mud circulation device according to claim 3, characterized in that: The discharge assembly (2) is provided in four groups and is symmetrically distributed. The two groups of discharge assemblies (2) are connected by a synchronous belt drive mechanism (3). The two ends of the synchronous belt drive mechanism (3) are respectively connected to the shaft of the auger (23), and the synchronous belt drive mechanism (3) is used for the synchronous transmission of the two groups of discharge assemblies (2).

5. A drilling mud circulation device according to claim 1, characterized in that: The first filter box (12) and the second filter box (14) are provided with discharge ports at the lowest points of the first filter screen (4) and the second filter screen (5), and the discharge ports are fixedly connected to the inlet of the conveying pipe (21).

6. A drilling mud circulation device according to claim 1, characterized in that: The cross-sections of the first filter (4) and the second filter (5) are both "∧" shaped, and the pore size of the first filter (4) is larger than that of the second filter (5).

7. A drilling mud circulation device according to claim 6, characterized in that: The first filter screen (4) and the second filter screen (5) are fixedly connected to both sides of the upper surface of the filter screen (61) and the collecting plate (62). The collecting plate (62) is symmetrically distributed on both sides of the filter screen (61), and two collecting plates (62) are provided on both sides of each filter screen (61). The filter screen (61) has a symmetrical obtuse angle structure.

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