A multifunctional cleaning circulation pool

Abstract

This utility model discloses a multifunctional cleaning circulation tank, including a lower circulation tank and an upper circulation tank at the upper end of the lower circulation tank. The upper circulation tank contains a solid-liquid-oil-water separation component and a coarse filter component. A return outlet is provided in the solid-liquid separation component of the upper circulation tank. A sieve is provided at the bottom of the upper circulation tank near the coarse filter component, connecting the upper and lower circulation tanks. An inlet is provided in the lower circulation tank, and a fine filter component is located between the inlet and the sieve of the upper circulation tank. This utility model is simple and easy to operate, effectively reducing the labor intensity of employees, achieving oil-water separation, solid-liquid separation, and dry-wet separation. The filtered liquid meets turbidity standards, effectively reducing the amount of circulating liquid used.

Description

Technical Field

[0001] This utility model relates to the field of filtration equipment technology, specifically a multifunctional cleaning and circulating pool. Background Technology

[0002] During well workover operations in the petroleum industry, procedures such as well washing, sand flushing, plug drilling, and milling are required. These procedures necessitate large quantities of circulating fluid. A significant portion of the returned fluid contains impurities such as sludge, formation sand, slurry, debris, and scale. This sludge and impurities cannot be directly recycled back into the well, as it would cause blockages in the tubing and tools. Currently, operational wells lack specialized filtration systems, relying primarily on simple isolation and sedimentation devices such as high-low tanks and baffles. These measures fail to achieve complete oil-water or wet / dry separation, and most of the returned fluid is not thoroughly isolated and precipitated, rapidly flowing back to the inlet and being pumped into the well, causing blockages in the tubing and tools. Therefore, a clean circulation system is needed on-site to achieve oil-water separation, solid-liquid separation, and turbidity compliance, reducing circulating fluid consumption, preventing tubing and tool blockages, and meeting on-site operational requirements.

[0003] Announcement No.: CN221481877U discloses a well workover fluid circulation treatment device, including an upper tank and a lower tank. The upper tank consists of an oil storage tank, a sand storage tank and a buffer tank connected in sequence. The lower tank is a water storage tank connected to the buffer tank. An injection port is provided above the sand storage tank. The upper tank is equipped with a three-stage filtration device.

[0004] Announcement No. CN114165178B discloses an integrated treatment device for sand separator and backflow, including a sand-water separation tank. The sand-water separation tank has a sand filter box inside, and a filter plate is provided at the bottom of the sand filter box. The sand-water separation tank includes a sand flushing tank and a cleaning tank. A sand discharge manifold and a blowout manifold are provided on one side of the sand-water separation tank. The drain outlets of the sand discharge manifold and the blowout manifold are located above the cleaning tank. The sand flushing tank is connected to the cleaning tank. The cleaning tank has an opening located above the sand filter box.

[0005] Announcement No. CN217151880U discloses a continuous multi-stage sand settling and filtration device for oil and water well washing operations, including a filtration tank. The filtration tank is arranged horizontally in sequence with a primary slow-release tank, a secondary slow-release tank, a tertiary slow-release tank, a coarse filter tank, a fine filter tank, a high-precision filter tank, and a storage tank. The top of the primary slow-release tank is connected to a string of oil pipes, and the side wall of the storage tank is connected to a short section of oil pipes. Trapezoidal flow channels are provided between the primary and secondary slow-release tanks, between the secondary and tertiary slow-release tanks, between the tertiary slow-release tank and the coarse filter tank, between the coarse filter tank and the fine filter tank, between the fine filter tank and the high-precision filter tank, and between the high-precision filter tank and the storage tank.

[0006] The structures of the aforementioned prior art are all different from those of this patent, and the treatment effect of the aforementioned prior art on the backflow liquid is not as good as that of this patent.

[0007] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0008] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a multifunctional cleaning circulation pool.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A multifunctional cleaning circulation tank includes a lower circulation tank, an upper circulation tank at the upper end of the lower circulation tank, and a solid-liquid-oil-water separation component and a coarse filter component installed in the upper circulation tank. A return outlet is provided in the solid-liquid separation component of the upper circulation tank. A sieve is provided at the bottom of the upper circulation tank near the coarse filter component, connecting the upper circulation tank and the lower circulation tank. An inlet is provided in the lower circulation tank, and a fine filter component is installed within the lower circulation tank, located between the inlet and the sieve of the upper circulation tank.

[0011] Furthermore, the solid-liquid-oil-water separation assembly includes a sedimentation tank and an oil-water separation filter.

[0012] Specifically, the oil-water separation filter screen is close to the coarse filter assembly, the upper end of the sedimentation tank is open, the sedimentation tank is connected to the return liquid port, the lower end face of the sedimentation tank is provided with support legs, the bottom of the sedimentation tank is provided with liquid passage holes, and the oil-water separation filter screen separates the upper circulation pool.

[0013] Specifically, the coarse filtration assembly includes a coarse filter screen, which separates the upper circulation pool;

[0014] Specifically, the fine filtration assembly includes a fine filter screen that separates the lower circulation pool.

[0015] Furthermore, the lower circulation tank is provided with a drain outlet at one end near the screen holes of the upper circulation tank;

[0016] Specifically, the space between the end face of the lower circulation tank near the screen hole of the upper circulation tank and the end face of the upper circulation tank near the screen hole of the upper circulation tank is the outlet.

[0017] Specifically, the fine filtration assembly further includes a first L-shaped filter and a second L-shaped filter;

[0018] Specifically, the horizontal plate of the first L-shaped filter screen and the horizontal plate of the second L-shaped filter screen are both connected to the end face of the lower circulation pool near the screen hole of the upper circulation pool.

[0019] Specifically, the second L-shaped filter screen is located inside the first L-shaped filter screen, and the upper circulation pool screen holes are located between the vertical plate of the first L-shaped filter screen and the vertical plate of the second L-shaped filter screen.

[0020] Specifically, the horizontal plate of the first L-shaped filter screen is provided with filter holes, and the vertical plate of the second L-shaped filter screen is provided with filter holes;

[0021] Specifically, the space between the first L-shaped filter screen and the second L-shaped filter screen is filled with adsorption filter material.

[0022] Furthermore, the oil-water separation filter, the coarse filter, and the fine filter all include a filter screen housing;

[0023] Specifically, the filter screen shell is a plate-shaped shell with an opening at the top and through-flow holes on the plate surface; the oil-water separation filter screen is filled with oil filter cotton, the coarse filter screen is filled with coarse filter cotton, and the fine filter screen is filled with fine filter cotton.

[0024] Furthermore, the solid-liquid-oil-water separation assembly is provided with at least two sets; the coarse filtration assembly includes at least two coarse filter screens; the fine filtration assembly includes at least two fine filter screens;

[0025] Specifically, the upper circulation tank is connected to an oil-water separation filter and a coarse filter via a U-shaped groove;

[0026] Specifically, the lower circulation pool is connected to a fine filter screen via a U-shaped groove.

[0027] Furthermore, the main frames of the lower circulation pool and the upper circulation pool are both rectangular structures, with plates laid around the perimeter and bottom of the rectangular structures. The length and width of the upper circulation pool are smaller than those of the lower circulation pool. The upper circulation pool is located between the fine filtration component and the vertical plate of the first L-shaped filter screen.

[0028] Furthermore, a first sliding cover plate, a second sliding cover plate, and a third sliding cover plate are slidably disposed at the upper end of the upper circulation pool;

[0029] Specifically, the first sliding cover corresponds to the coarse filter screen; the second sliding cover corresponds to the second sedimentation tank, and a second return port is opened on the second sliding cover; the third sliding cover corresponds to the first sedimentation tank, and a first return port is opened on the third sliding cover.

[0030] Specifically, a return liquid pipeline is provided on the outer wall of the upper circulation pool. The return liquid pipeline is connected to the first return liquid port and the second return liquid port respectively, and the return liquid pipeline is provided with a liquid receiving port.

[0031] Furthermore, the upper side of the upper circulation pool is symmetrically provided with outer and inner tracks;

[0032] Specifically, the second sliding cover is slidably disposed on the outer track, and the first sliding cover and the third sliding cover are slidably disposed on the outer track;

[0033] Specifically, the inner cavity of the second sliding cover is larger than the outer shape of the first sliding cover and the outer shape of the third sliding cover.

[0034] Furthermore, the return pipeline includes a first return branch pipe, a second return branch pipe, and a connecting pipe that are interconnected.

[0035] Specifically, the first return liquid branch pipe and the second return liquid branch pipe are U-shaped pipe structures facing downwards, and control ball valves are connected to the outer vertical pipes of the first return liquid branch pipe and the second return liquid branch pipe;

[0036] Specifically, the inner vertical tube of the first return branch pipe passes through the first return port and is inserted into the first sedimentation tank, and the inner vertical tube of the second return branch pipe passes through the second return port and is inserted into the second sedimentation tank.

[0037] Specifically, the connecting pipe is connected to the lower end of the outer vertical pipe of the first return liquid branch pipe and the second return liquid branch pipe, respectively.

[0038] Furthermore, the lower circulation tank is slidably provided with a lower right cover plate and a lower left cover plate above the fine filter assembly, and the upper side of the lower circulation tank is symmetrically provided with a lower outer track and a lower inner track above the fine filter assembly;

[0039] Specifically, the lower right cover plate is slidably mounted on the lower inner track, the lower left cover plate is slidably mounted on the lower outer track, and the inner cavity space of the lower left cover plate is larger than the outer shape of the lower right cover plate;

[0040] Specifically, the lower right cover plate is provided with a water inlet, and a water inlet pipe is inserted into the water inlet;

[0041] Specifically, an outlet is provided at the bottom of the end face of the lower circulation tank near the fine filter component, and the outlet is fitted with a plug.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] This utility model is simple and easy to operate, effectively reducing the labor intensity of employees, realizing oil-water separation, solid-liquid separation, and dry-wet separation. The filtered liquid achieves the required turbidity, effectively reducing the amount of circulating liquid used. It plays an irreplaceable role in reducing environmental pollution and achieving clean production, and has significant economic and social benefits. Attached Figure Description

[0044] Figure 1 This is a front view of a multifunctional cleaning and circulation pool according to this utility model.

[0045] Figure 2 This is a cross-sectional view of a multifunctional cleaning and circulating pool according to this utility model.

[0046] Figure 3 This is a schematic diagram of the upper circulation pool in this utility model.

[0047] Figure 4 This is a schematic diagram of the lower circulation pool in this utility model.

[0048] Figure 5 This is a schematic diagram of the return liquid pipeline in this utility model.

[0049] Figure 6 This is a schematic diagram of the sedimentation tank in this utility model.

[0050] Figure 7 This is a schematic diagram of the structure of the filter screen in this utility model.

[0051] Figure 8 This is a schematic diagram of the cover plate in this utility model.

[0052] Figure 9 This is a schematic diagram of the cover plate sliding wheel in this utility model.

[0053] Figure 10 This is a schematic diagram of the cover plate slide in this utility model.

[0054] In the diagram: lower circulation pool 1, first limiting block 1-1, second limiting block 1-2, third limiting block 1-3, fourth limiting block 1-4, sixth U-shaped groove 1-5, seventh U-shaped groove 1-6, eighth U-shaped groove 1-7, lower outer track 1-8, first lower lifting lug 1-9, second lower lifting lug 1-10, third lower lifting lug 1-11, fourth lower lifting lug 1-12;

[0055] Upper circulation pool 2, round hole 2-1, inner track 2-2, fifth U-shaped groove 2-3, fourth U-shaped groove 2-4, third U-shaped groove 2-5, second U-shaped groove 2-6, first U-shaped groove 2-7, first angle steel 2-8, second angle steel 2-9, third angle steel 2-10, fourth angle steel 2-11, upper lifting lug 2-12, outer track 2-13, inverted U-shaped steel plate 2-14;

[0056] First sliding cover plate 3, second sliding cover plate 4, ladder 5;

[0057] Return liquid line 6, inlet 6-1, second return liquid branch pipe 6-2, first return liquid branch pipe 6-3;

[0058] 7. Control ball valve, 8. Third sliding cover plate, 9. Lower right cover plate, 10. Lower left cover plate, 11. Water supply pipeline, 12. Water outlet, 13. Plug, 14. First sedimentation tank, 15. First oil-water separator filter, 16. Second sedimentation tank, 17. Second oil-water separator filter, 18. First coarse filter, 19. Second coarse filter, 20. Third coarse filter, 21. Upper circulation tank screen, 22. First L-shaped filter, 23. Second L-shaped filter, 24. First fine filter, 25. Second fine filter, 26. Third fine filter, 27. U-shaped clamp. Detailed Implementation

[0059] 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.

[0060] Example 1:

[0061] Please see Figures 1 to 10 This utility model provides a multifunctional cleaning circulation tank, including a lower circulation tank 1 and an upper circulation tank 2. The lower circulation tank 1 and the upper circulation tank 2 are placed on top of the lower circulation tank 1. The upper circulation tank 2 is equipped with a solid-liquid-oil-water separation component and a coarse filter component. The upper circulation tank 2 has a return outlet at the solid-liquid separation component. The bottom of the upper circulation tank 2 is provided with an upper circulation tank sieve hole 21 near the coarse filter component. The upper circulation tank sieve hole 21 connects the upper circulation tank 2 and the lower circulation tank 1. The lower circulation tank 1 is equipped with a fine filter component. The lower circulation tank 1 is provided with a drain outlet at the end near the upper circulation tank sieve hole 21 and a water inlet at the end away from the upper circulation tank sieve hole 21.

[0062] Specifically, the main frames of the lower circulation pool 1 and the upper circulation pool 2 are both rectangular steel structures. Steel plates are laid around the perimeter and bottom of the rectangular steel structures. The length and width of the upper circulation pool 2 are smaller than those of the lower circulation pool 1. The upper end of the lower circulation pool 1 is provided with a first limiting block 1-1, a second limiting block 1-2, a third limiting block 1-3, and a fourth limiting block 1-4. The four corners of the bottom of the upper circulation pool 2 are respectively positioned with the first limiting block 1-1, the second limiting block 1-2, the third limiting block 1-3, and the fourth limiting block 1-4 to facilitate the hoisting and installation of the upper circulation pool 2.

[0063] Specifically, the upper circulation pool screen 21 is composed of rows of round holes 2-1.

[0064] Furthermore, the solid-liquid-oil-water separation assembly includes a sedimentation tank and an oil-water separation filter screen. The oil-water separation filter screen is located near the coarse filter assembly. The sedimentation tank has an opening at its upper end and is connected to a return liquid port. A support leg is provided on the lower end face of the sedimentation tank. A liquid passage hole is provided at the bottom of the sedimentation tank. The oil-water separation filter screen separates the upper circulation pool 2.

[0065] In this embodiment, two sets of solid-liquid-oil-water separation components are provided. The upper circulation tank 2 is sequentially provided with a first sedimentation tank 14, a first oil-water separation filter 15, a second sedimentation tank 16, a second oil-water separation filter 17, a coarse filter component, and an upper circulation tank sieve 21.

[0066] Specifically, the support legs support the bottom of the sedimentation tank to rise to a certain height, leaving space for flow. Lifting lugs are provided around the upper part of the sedimentation tank for easy hoisting.

[0067] Furthermore, the coarse filtration assembly includes a coarse filter screen, which separates the upper circulation pool 2.

[0068] In this embodiment, the coarse filter assembly includes three coarse filter screens, namely a first coarse filter screen 18, a second coarse filter screen 19, and a third coarse filter screen 20.

[0069] Furthermore, the space between the end face of the lower circulation tank 1 near the screen hole 21 of the upper circulation tank and the end face of the upper circulation tank 2 near the screen hole 21 of the upper circulation tank is a water outlet; the fine filter assembly includes a fine filter screen, which separates the lower circulation tank 1.

[0070] In this embodiment, the fine filtration assembly includes three fine filter screens, namely a first fine filter screen 24, a second fine filter screen 25, and a third fine filter screen 26.

[0071] Specifically, the oil-water separation filter, coarse filter, and fine filter have similar structures, all including a filter shell, such as... Figure 7 As shown, the filter screen shell is a plate-shaped shell with an opening at the top and through-flow holes on the plate surface; the oil-water separation filter screen is filled with oil filter cotton, the coarse filter screen is filled with coarse filter cotton, and the fine filter screen is filled with fine filter cotton.

[0072] Specifically, the inner wall of the upper circulation pool 2 is provided with two symmetrical U-shaped grooves: a first U-shaped groove 2-7, a second U-shaped groove 2-6, a third U-shaped groove 2-5, a fourth U-shaped groove 2-4, and a fifth U-shaped groove 2-3. The first U-shaped groove 2-7 is connected to a first oil-water separator 15, the second U-shaped groove 2-6 is connected to a second oil-water separator 17, the third U-shaped groove 2-5 is connected to a first coarse filter 18, the fourth U-shaped groove 2-4 is connected to a second coarse filter 19, and the fifth U-shaped groove 2-3 is connected to a third coarse filter 20.

[0073] Specifically, the inner wall of the lower circulation pool 1 is provided with a sixth U-shaped groove 1-5, a seventh U-shaped groove 1-6, and an eighth U-shaped groove 1-7 that are symmetrical on both sides. The sixth U-shaped groove 1-5 is connected to a first fine filter screen 24, the seventh U-shaped groove 1-6 is connected to a second fine filter screen 25, and the eighth U-shaped groove 1-7 is connected to a third fine filter screen 26.

[0074] Furthermore, the fine filtration assembly also includes a first L-shaped filter screen 22 and a second L-shaped filter screen 23. The horizontal plates of the first L-shaped filter screen 22 and the second L-shaped filter screen 23 are both connected to the end face of the lower circulation pool 1 near the sieve hole 21 of the upper circulation pool. The second L-shaped filter screen 23 is located inside the first L-shaped filter screen 22. The sieve hole 21 of the upper circulation pool is located between the vertical plate of the first L-shaped filter screen 22 and the vertical plate of the second L-shaped filter screen 23. The horizontal plate of the first L-shaped filter screen 22 is provided with filter holes, and the vertical plate of the second L-shaped filter screen 23 is provided with filter holes. The space between the first L-shaped filter screen 22 and the second L-shaped filter screen 23 is filled with adsorption filter media such as volcanic rock or walnut shells. The second L-shaped filter screen 23 and the end face of the lower circulation pool 1 form a water discharge trough, and the space between the first L-shaped filter screen 22 and the second L-shaped filter screen 23 forms a filter media pool.

[0075] Specifically, the horizontal plate depth of the second L-shaped filter 23 is one-third of the height of the circulation pool 1, and the horizontal plate depth of the first L-shaped filter 22 is two-thirds of the height of the circulation pool 1.

[0076] Specifically, the first limiting block 1-1 and the second limiting block 1-2 are located on both sides of the second L-shaped filter screen 23; the third limiting block 1-3 and the fourth limiting block 1-4 are located between the fine filter assembly and the upright plate of the first L-shaped filter screen 22, which facilitates the removal and placement of the fine filter screen.

[0077] Furthermore, an outlet 12 is provided at the bottom of the end face of the lower circulation tank 1 near the fine filter screen, and a plug 13 is provided at the outlet 12.

[0078] Specifically, lifting lugs 2-12 are provided at the four corners of the upper end of the upper circulation pool 2 for hoisting. An inverted U-shaped steel plate 2-14 is welded to the upper end of the upper circulation pool 2 near the screen hole 21 of the upper circulation pool for auxiliary traction during hoisting.

[0079] Specifically, the bottom of the outer wall of the lower circulation pool 1 is symmetrically provided with a first lower lifting lug 1-9, a second lower lifting lug 1-10, a third lower lifting lug 1-11, and a fourth lower lifting lug 1-12 for hoisting purposes.

[0080] Specifically, the liquid passage holes, flow holes, and filter holes are all arranged in an array.

[0081] Example 2:

[0082] Based on Embodiment 1, in this embodiment, a first sliding cover plate 3, a second sliding cover plate 4, and a third sliding cover plate 8 are slidably arranged on the upper end of the upper circulation tank 2. The first sliding cover plate 3 corresponds to the coarse filter screen, the second sliding cover plate 4 corresponds to the second sedimentation tank 16, and a second return liquid port is opened on the second sliding cover plate 4. The third sliding cover plate 8 corresponds to the first sedimentation tank 14, and a first return liquid port is opened on the third sliding cover plate 8. A return liquid pipeline 6 is arranged on the outer wall of the upper circulation tank 2. The return liquid pipeline 6 is connected to the first return liquid port and the second return liquid port respectively. The return liquid pipeline 6 is provided with a liquid receiving port 6-1.

[0083] Specifically, the upper circulation pool 2 is symmetrically welded with an outer track 2-13 and an inner track 2-2 on its upper side. The second sliding cover 4 is slidably mounted on the outer track 2-13 by four sliding wheels 28. The first sliding cover 3 and the third sliding cover 8 are slidably mounted on the outer track 2-13 by four sliding wheels 28 respectively. The inner cavity of the second sliding cover 4 is larger than the outer shape of the first sliding cover 3 and the third sliding cover 8. When the second sliding cover 4 slides on the outer track 2-13, it can cover the first sliding cover 3 and the third sliding cover 8. When the first sliding cover 3 and the third sliding cover 8 slide on the inner track 2-2, they can slide into the second sliding cover 4.

[0084] Specifically, the return pipeline 6 is a three-way pipe structure, including a first return branch pipe 6-3, a second return branch pipe 6-2, and a connecting pipe that are interconnected. The first return branch pipe 6-3 and the second return branch pipe 6-2 are U-shaped pipe structures facing downwards. The outer vertical pipes of the first return branch pipe 6-3 and the second return branch pipe 6-2 are connected to control ball valves 7 by threads. The inner vertical pipe of the first return branch pipe 6-3 passes through the first return port and is inserted into the first sedimentation tank 14. The inner vertical pipe of the second return branch pipe 6-2 passes through the second return port and is inserted into the second sedimentation tank 16. The connecting pipe is a T-shaped pipe and is connected to the lower end of the outer vertical pipes of the first return branch pipe 6-3 and the second return branch pipe, respectively. The liquid inlet 6-1 of the connecting pipe is connected to the circulation pipeline of the circulation outlet by threads.

[0085] Specifically, the outer wall of the upper circulation pool 2 is welded with a first angle steel 2-8, a second angle steel 2-9, a third angle steel 2-10, and a fourth angle steel 2-11. Holes are drilled at the top of the angle steels, and the holes match the U-shaped clips 27. The return liquid pipeline 6 is fixed to the first angle steel 2-8, the second angle steel 2-9, the third angle steel 2-10, and the fourth angle steel 2-11 by the four U-shaped clips 27.

[0086] Specifically, a ladder 5 is provided on the outer wall of the upper circulation pool 2.

[0087] In this embodiment, the lower circulation tank 1 has a lower right cover plate 9 and a lower left cover plate 10 slidably disposed above the fine filter assembly. The upper side of the lower circulation tank 1 is symmetrically welded with a lower outer track 1-8 and a lower inner track above the fine filter assembly. The lower right cover plate 9 is slidably disposed on the lower inner track by four sliding wheels 28, and the lower left cover plate 10 is slidably disposed on the lower outer track 1-8 by four sliding wheels 28. The inner cavity of the lower left cover plate 10 is larger than the outer shape of the lower right cover plate 9, and the lower left cover plate 10 can cover the lower right cover plate 9 when sliding on the lower outer track 1-8.

[0088] Specifically, the lower right cover plate 9 is provided with a water inlet, and a water inlet pipe 11 is inserted into the water inlet. The water inlet pipe 11 is inserted to the bottom of the lower circulation pool 1, and the end of the water inlet pipe 1 away from the lower circulation pool 1 is connected to the pipeline of the cement truck through a threaded connection.

[0089] Example 3:

[0090] Based on Example 2, this example provides a method for installing and using a multifunctional cleaning circulation pool, including the following steps:

[0091] Oil filter cotton is installed in the first oil-water separation filter screen 15 and the second oil-water separation filter screen 17 and inserted into the upper circulation tank 2. Coarse filter cotton is installed in the first coarse filter screen 18, the second coarse filter screen 19 and the third coarse filter screen 20 and inserted into the upper circulation tank 2. Filter screens are laid at the bottom of the first sedimentation tank 14 and the second sedimentation tank 16 and hoisted into the upper circulation tank 2. The first sliding cover plate 3, the second sliding cover plate 4 and the third sliding cover plate 8 are installed on the inner track 2-2 and the outer track 2-13 respectively. The return liquid pipeline 6 is assembled and fixed to the outside of the upper circulation tank 2 with U-shaped clamps 27.

[0092] Physical filter media such as volcanic rock and walnut shells are laid in the filter media tank of the lower circulation tank 1. Fine filter cotton is installed in the first fine filter screen 24, the second fine filter screen 25, and the third fine filter screen 26 and inserted into the lower circulation tank 1. The water supply line 11 is inserted into the middle of the lower circulation tank 1. The lower right cover plate 9 and the lower left cover plate 10 are installed on the lower inner track 2-2 and the lower outer slide. The plug 13 is rotated and connected to the water outlet 12.

[0093] The upper circulation tank 2 is lifted and placed on the lower circulation tank 1 within the area enclosed by the first limiting block 1-1, the second limiting block 1-2, the third limiting block 1-3, and the fourth limiting block 1-4. Then, the whole unit is lifted and placed in the designated position at the well site.

[0094] After the circulation tank is in place, the water supply pipeline 11 is connected to the cement truck pipeline, and the liquid inlet 6-1 of the return pipeline 6 is connected to the return circulation pipeline inside the well. The cleaning liquid delivered to the well by the tanker truck is released into the lower circulation tank 1 from the water discharge trough. The cleaning liquid enters the filter media tank for filtration through the filter holes on the side of the second L-shaped filter screen 23, and then passes through the first fine filter screen 24, the second fine filter screen 25, and the third fine filter screen 26 for fine filtration before reaching the water supply pipeline 11, ensuring that the turbidity of the cleaning liquid delivered to the well meets the standard before entering the well. The setting of the water discharge trough allows the cleaning liquid delivered to the well by the tanker truck to not have to go through the entire process of the circulation tank, which improves the construction efficiency.

[0095] After the lower circulation tank is full, the tanker stops discharging liquid, opens the two ball valves 7 on the return pipeline 6, and starts the cement truck to pump liquid into the well. The mixed liquid returning from the well enters the first settling tank 14 and the second settling tank 16 through the return pipeline 6 and ball valves 7. Larger solid particles such as sand and scale in the mixed liquid cannot pass through the bottom screens of settling tanks 14 and 15 and remain inside the first settling tank 14 and the second settling tank 16, achieving solid-liquid separation. The liquid passes through the filter screens at the bottom of the first settling tank 14 and the second settling tank 16, and then through the first oil-water separation filter screen 15 and the second oil-water separation filter screen 17, which are equipped with oil-filtering cotton. The sludge in the liquid cannot pass through the oil-filtering cotton and remains in the oil-water separation filter screen, achieving oil-water separation. The liquid that has passed through the oil-water separation filter screen then passes through the first coarse filter screen 18, which carries out the coarse filter cotton. The second coarse filter screen 19 and the third coarse filter screen 20 filter out larger fine particles, further reducing turbidity and solid particle content. The liquid passes through the first coarse filter screen 18, the second coarse filter screen 19, and the third coarse filter screen 20 and enters the filter media tank through the bottom screen 21 of the upper circulation tank. Through physical adsorption filtration, fine particles in the liquid are adsorbed by volcanic rock, walnut shells, etc., further reducing turbidity and fine particles. The liquid filtered by the filter media in the filter media tank enters the lower inner circulation tank 1 through the bottom filter hole of the first L-shaped filter screen 22. The liquid continues to flow through the first fine filter screen 24, the second fine filter screen 25, and the third fine filter screen 26 with fine filter cotton and reaches the water inlet 11. The turbidity of the liquid basically meets the design requirements. After opening the lower left cover plate 10 and measuring the liquid turbidity with a turbidity meter, the circulation continues.

[0096] When the settling tank is filled with solid particles such as sand and scale returned from the well, close the ball valve 7 of the return fluid line 6, remove the return fluid line 6, open the sliding cover, lift the settling tank, and the liquid in the settling tank will be filtered out from the bottom screen. After the liquid stops flowing out of the bottom screen, the dry and wet separation is achieved. Lift it onto the transfer vehicle and transport it to the designated location for cleaning and then put it back in. The same operation can be used to transfer the settling tank.

[0097] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0098] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0099] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0100] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0101] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multifunctional cleaning and circulating pool, comprising a lower circulating pool, wherein an upper circulating pool is disposed at the upper end of the lower circulating pool, characterized in that, The upper circulation tank is equipped with a solid-liquid-oil-water separation component and a coarse filter component; The upper circulation tank is equipped with a return port in the solid-liquid separation component; The upper circulation tank is provided with an upper circulation tank screen hole at the bottom end near the coarse filter component, and the upper circulation tank screen hole connects the upper circulation tank and the lower circulation tank. The lower circulation tank is provided with an inlet, and a fine filter assembly is provided inside the lower circulation tank. The fine filter assembly is located between the inlet and the sieve holes of the upper circulation tank.

2. The multifunctional cleaning and circulating pool according to claim 1, characterized in that, The solid-liquid-oil-water separation component includes a sedimentation tank and an oil-water separation filter. The oil-water separation filter screen is close to the coarse filter assembly, the upper end of the sedimentation tank is open, the sedimentation tank is connected to the return liquid port, the lower end face of the sedimentation tank is provided with support legs, the bottom of the sedimentation tank is provided with liquid passage holes, and the oil-water separation filter screen separates the upper circulation pool. The coarse filtration assembly includes a coarse filter screen, which separates the upper circulation pool; The fine filtration assembly includes a fine filter screen, which separates the lower circulation pool.

3. The multifunctional cleaning and circulating pool according to claim 2, characterized in that, The lower circulation tank has a drain outlet at one end near the screen holes of the upper circulation tank; The space between the end face of the lower circulation tank near the screen hole of the upper circulation tank and the end face of the upper circulation tank near the screen hole of the upper circulation tank is the outlet. The fine filtration assembly also includes a first L-shaped filter and a second L-shaped filter; The horizontal plate of the first L-shaped filter screen and the horizontal plate of the second L-shaped filter screen are both connected to the end face of the lower circulation tank near the screen hole of the upper circulation tank. The second L-shaped filter screen is located inside the first L-shaped filter screen, and the upper circulation pool screen holes are located between the vertical plate of the first L-shaped filter screen and the vertical plate of the second L-shaped filter screen. The horizontal plate of the first L-shaped filter screen is provided with filter holes, and the vertical plate of the second L-shaped filter screen is provided with filter holes; The space between the first L-shaped filter screen and the second L-shaped filter screen is filled with adsorption filter material.

4. A multifunctional cleaning and circulating pool according to claim 2, characterized in that, The oil-water separation filter, coarse filter, and fine filter all include a filter shell; The filter screen shell is a plate-shaped shell with an opening at the top and through-flow holes on the plate surface. The oil-water separation filter screen is filled with oil filter cotton, the coarse filter screen is filled with coarse filter cotton, and the fine filter screen is filled with fine filter cotton.

5. A multifunctional cleaning and circulating pool according to claim 2, characterized in that, The solid-liquid-oil-water separation assembly is provided with at least two sets; the coarse filtration assembly includes at least two coarse filter screens; the fine filtration assembly includes at least two fine filter screens; The upper circulation tank is connected to the oil-water separation filter and the coarse filter via a U-shaped groove; The lower circulation tank is connected to a fine filter screen via a U-shaped groove.

6. A multifunctional cleaning and circulating pool according to claim 3, characterized in that, The main frames of the lower and upper circulation pools are both rectangular structures, with plates laid around the perimeter and bottom of the rectangular structures. The length and width of the upper circulation pool are smaller than those of the lower circulation pool. The upper circulation pool is located between the fine filtration component and the upright plate of the first L-shaped filter screen.

7. A multifunctional cleaning and circulating pool according to claim 6, characterized in that, The upper end of the upper circulation pool is slidably provided with a first sliding cover plate, a second sliding cover plate, and a third sliding cover plate; The first sliding cover corresponds to the coarse filter screen; the second sliding cover corresponds to the second sedimentation tank, and a second return port is opened on the second sliding cover; the third sliding cover corresponds to the first sedimentation tank, and a first return port is opened on the third sliding cover. A return liquid pipeline is provided on the outer wall of the upper circulation tank. The return liquid pipeline is connected to the first return liquid port and the second return liquid port respectively, and the return liquid pipeline is provided with a liquid receiving port.

8. A multifunctional cleaning and circulating pool according to claim 7, characterized in that, The upper circulation pool is symmetrically provided with outer and inner tracks on its upper side. The second sliding cover is slidably disposed on the outer track, and the first sliding cover and the third sliding cover are slidably disposed on the outer track; The inner cavity of the second sliding cover is larger than the outer shape of the first sliding cover and the outer shape of the third sliding cover.

9. A multifunctional cleaning and circulating pool according to claim 7, characterized in that, The return pipeline includes a first return branch pipe, a second return branch pipe, and a connecting pipe that are interconnected. The first and second return liquid branch pipes are U-shaped pipe structures facing downwards, and control ball valves are connected to the outer vertical pipes of both the first and second return liquid branch pipes. The inner vertical tube of the first return liquid branch pipe passes through the first return liquid port and is inserted into the first sedimentation tank; the inner vertical tube of the second return liquid branch pipe passes through the second return liquid port and is inserted into the second sedimentation tank. The connecting pipes are respectively connected to the lower ends of the outer vertical pipes of the first return liquid branch pipe and the second return liquid branch pipe.

10. A multifunctional cleaning and circulating pool according to claim 6, characterized in that, The lower circulation tank has a lower right cover plate and a lower left cover plate slidably installed above the fine filter assembly. The upper side of the lower circulation tank has a lower outer track and a lower inner track symmetrically arranged above the fine filter assembly. The lower right cover plate is slidably mounted on the lower inner track, and the lower left cover plate is slidably mounted on the lower outer track. The inner cavity of the lower left cover plate is larger than the outer shape of the lower right cover plate. The lower right cover plate is provided with a water inlet, and a water inlet pipe is inserted into the water inlet; The lower circulation tank has an outlet at the bottom of the end face near the fine filter component, and the outlet is fitted with a plug.

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