Slurry circulation tank

Abstract

The invention relates to the related technical field of slurry circulation tanks, in particular to a slurry circulation tank which comprises a circulation tank body and a dredging mechanism, the circulation tank body is of a rectangular box body structure, a liquid inlet is formed in the front side end face of the circulation tank body, and a liquid outlet is formed in the rear side end face of the circulation tank body; a first-stage sludge accumulation hopper, a second-stage sludge accumulation hopper, a third-stage sludge accumulation hopper and a fourth-stage sludge accumulation hopper are integrally formed on the bottom surface of the circulating tank body and are all arranged in a hopper shape; the first-stage silt accumulation hopper, the second-stage silt accumulation hopper, the third-stage silt accumulation hopper and the fourth-stage silt accumulation hopper are arranged on the bottom face of the circulating tank body, and the desilting mechanism is formed by combining a silt accumulation pipe, a piston, a telescopic air cylinder, a first-stage sealing plate and a second-stage sealing plate, so that the desilting mechanism can achieve continuous desilting work; and the water content in the discharged sludge can be reduced, so that the utilization rate of water can be effectively improved while the dredging effect is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the mud circulating tank related technical field, specifically to a kind of mud circulating tank. BACKGROUND

[0002] Mud circulating tank is indispensable equipment in the process of oil drilling. The purpose of the drilling equipment ground fluid treatment system is to provide sufficient treated drilling fluid for drilling operation, and the drilling fluid circulating system must have enough space to process the drilling fluid sucked and balanced above the pipeline, so that the wellbore is full of liquid when tripping out;

[0003] The existing patent file with the announcement number CN220705663U discloses a drilling mud circulating tank, which includes a frame, a circulating tank, a mixer and a flushing pipeline. The frame includes a tank top frame and a tank base, and the tank top frame is installed on the tank base through tank columns. The circulating tank includes multiple cylindrical tanks, and the top of each cylindrical tank is connected in sequence. The mixer is installed at the top of each cylindrical tank and is suitable for lifting the sediment at the bottom of the cylindrical tank upward. The flushing pipeline is installed at the bottom of the circulating tank and flushes the bottom of each cylindrical tank during the stirring operation of the mixer. The tank top frame is divided into compartments by tank wallboards, and each cylindrical tank is installed in a compartment of the tank top frame. One side of the tank top frame is provided with a mixed output pipeline of a mud gun pipeline and a weighting pump output pipeline, and the other side is provided with a mud delivery pipeline. Mud pump suction pipelines and weighting pump suction pipelines are installed on both sides of the circulating tank, and the mud pump suction pipelines and the weighting pump suction pipelines are located above the tank base. The mud pump suction pipelines are connected to each cylindrical tank through valves to extract drilling fluid in the cylindrical tank to an oil well, and the weighting pump suction pipelines are used to add treating agents to each cylindrical tank.

[0004] However, the above scheme cannot continuously clean the sludge in the equipment well, and cannot fully separate the sludge, resulting in poor actual application effect of the equipment. Therefore, the present application proposes a mud circulating tank to solve the above problems. SUMMARY

[0005] The present application aims to provide a mud circulating tank to solve the problems raised in the background.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a mud circulating tank, comprising:

[0007] The circulating tank body is a rectangular box structure, and the front end face of the circulating tank body is provided with a liquid inlet, and the rear end face of the circulating tank body is provided with a liquid outlet, the bottom surface of the circulating tank body is integrally formed with a first accumulation hopper, a second accumulation hopper, a third accumulation hopper and a fourth accumulation hopper, the first accumulation hopper, the second accumulation hopper, the third accumulation hopper and the fourth accumulation hopper are all arranged in a bucket shape, and the upper side of the first accumulation hopper, the second accumulation hopper, the third accumulation hopper and the fourth accumulation hopper is connected with the inner cavity of the circulating tank body, and the bottom of the first accumulation hopper, the second accumulation hopper, the third accumulation hopper and the fourth accumulation hopper is integrally formed with a sludge discharge port.

[0008] The dredging mechanism is provided at the sludge discharge port of the first accumulation hopper, the second accumulation hopper, the third accumulation hopper and the fourth accumulation hopper, and each of the dredging mechanisms comprises a sludge pipe, a piston, a telescopic cylinder, a first sealing plate and a second sealing plate.

[0009] Preferably, the sludge pipe is integrally formed with the sludge discharge port, the lengths of the sludge pipe on both sides of the sludge discharge port are the same, the sludge pipe is connected with the sludge discharge port, the piston is movably arranged in the sludge pipe, the first sealing plate and the second sealing plate are fixed at both ends of the sludge pipe, a piston rod hole is formed in the second sealing plate, the telescopic cylinder is coaxially arranged with the sludge pipe, the piston rod of the telescopic cylinder passes through the piston rod hole and is fixedly connected with the piston, the length of the piston is one third of the length of the sludge pipe, and the length of the piston is greater than the diameter of the sludge discharge port.

[0010] Preferably, a first mounting groove and a second mounting groove are formed in the outer side walls of both ends of the sludge pipe, the first mounting groove and the second mounting groove are annular grooves, through holes are formed in the groove bottoms of the first mounting groove and the second mounting groove, geotextiles are installed in the first mounting groove and the second mounting groove, the geotextiles in the first mounting groove and the second mounting groove are positioned by first positioning members and second positioning members, the first positioning members and the second positioning members are composed of upper positioning parts and lower positioning parts, the upper positioning parts and the lower positioning parts are half-round pipe structures, a first connecting ear plate is integrally formed at the edge of the upper positioning part, a second connecting ear plate is integrally formed at the edge of the lower positioning part, and the first connecting ear plate and the second connecting ear plate are fixedly connected by a first bolt and a nut.

[0011] Preferably, both the upper and lower positioning parts are composed of an outer tube layer, an inner tube layer, an arc-shaped reinforcing rib, and a straight reinforcing rib. The outer tube layer, inner tube layer, arc-shaped reinforcing rib, and straight reinforcing rib are integrally formed. When the upper and lower positioning parts are aligned and connected, the outer tube layer fits against the outer surface of the sludge collection pipe, and the inner tube layer is embedded in the primary and secondary installation grooves. The arc-shaped reinforcing ribs and straight reinforcing ribs form a mesh structure. During actual installation, the arc-shaped reinforcing ribs and straight reinforcing ribs are offset from the through holes and abut against the geotextile.

[0012] Preferably, a liquid collection trough is provided at the bottom of the lower positioning part, and the arc-shaped reinforcing ribs and straight reinforcing ribs enclose a liquid collection cavity. The pair of liquid collection cavities at the bottom are connected to the liquid collection trough through connecting holes. The primary positioning component and the secondary positioning component are respectively provided with a primary pipe connector and a secondary pipe connector, and the primary pipe connector and the secondary pipe connector are connected through a liquid delivery pipe.

[0013] Preferably, the arc-shaped reinforcing rib has a primary flow channel, the straight reinforcing rib has a secondary flow channel, and adjacent liquid collection chambers are connected through the primary and secondary flow channels. A transparent observation port is provided on the side wall of the sludge discharge port.

[0014] Preferably, a primary sealing groove is formed at the edge of the inner tube layer, and a primary sealing strip is embedded in the primary sealing groove. When the inner tube layer is embedded in the primary installation groove and the secondary installation groove, the primary sealing strip is in a compressed state. A sealing seat is integrally formed on the secondary sealing plate at the outer port of the piston rod hole. A secondary sealing groove is formed on the inner side wall of the sealing seat, and a secondary sealing strip is embedded in the secondary sealing groove. When the piston rod of the telescopic cylinder passes through the sealing seat, the secondary sealing strip is in a compressed state.

[0015] Preferably, the liquid inlet is located on the lower side of the circulation tank, and the liquid outlet is located on the upper side of the circulation tank.

[0016] Preferably, both ends of the sludge collection pipe are integrally formed with a primary connecting flange and a secondary connecting flange, respectively. The primary connecting flange and the secondary connecting flange are each provided with a primary bolt hole. The primary sealing plate and the secondary sealing plate are each provided with a secondary bolt hole. The primary sealing plate and the secondary sealing plate are fixedly connected to the primary connecting flange and the secondary connecting flange respectively by bolts and nuts. A nut groove is provided at the inner end of the primary bolt hole, and the size of the nut groove matches the size of the bolt nut. When the bolt is actually installed, the bolt nut is embedded in the nut groove.

[0017] Preferably, four mounting beams are fixedly installed between the side walls of the circulation tank, and the four mounting beams are respectively aligned with the center positions of the primary, secondary, tertiary, and quaternary accumulation hoppers. A rotating shaft is rotatably installed on the mounting beam, and centrifugal blades are fixedly installed at the bottom of the rotating shaft. A drive motor and a reducer are fixedly installed on the top surface of the circulation tank. The rotating shaft of the drive motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the rotating shaft.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By setting up a mud circulation tank consisting of a circulation tank and a dredging mechanism, and by setting up a primary, secondary, tertiary and quaternary accumulation hopper on the bottom of the circulation tank, and by setting the dredging mechanism to consist of a mud collection pipe, piston, telescopic cylinder, primary sealing plate and secondary sealing plate, the dredging mechanism can achieve continuous dredging work and reduce the water content in the discharged sludge, thereby effectively improving the utilization rate of water while ensuring the dredging effect;

[0020] 2. The geotextile is positioned using primary and secondary positioning components. Both primary and secondary positioning components are composed of an upper positioning part and a lower positioning part. The upper and lower positioning parts are composed of an outer tube layer, an inner tube layer, an arc-shaped reinforcing rib, and a straight reinforcing rib. This ensures the stability of the structural positioning while guaranteeing the efficiency of water penetration through the geotextile, thereby effectively ensuring the overall dredging efficiency of the dredging mechanism. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a half-sectional view of the present invention;

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0024] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B;

[0025] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point C;

[0026] Figure 6 This is a schematic diagram of the sludge collection pipe structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the primary positioning component structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the lower positioning part of the present invention;

[0029] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point D;

[0030] Figure 10 This is a schematic diagram of the primary sealing strip structure of the present invention.

[0031] In the diagram: 1. Circulating tank; 2. Sludge removal mechanism; 3. Liquid inlet; 4. Liquid outlet; 5. Primary collecting hopper; 6. Secondary collecting hopper; 7. Tertiary collecting hopper; 8. Quaternary collecting hopper; 9. Sludge discharge port; 10. Sludge collection pipe; 11. Piston; 12. Telescopic cylinder; 13. Primary sealing plate; 14. Secondary sealing plate; 15. Primary mounting groove; 16. Secondary mounting groove; 17. Through hole; 18. Geotextile; 19. Primary positioning component; 20. Secondary positioning component; 21. Upper positioning part; 22. Lower positioning part; 23. Outer pipe layer; 24. Inner pipe layer; 25. Arc-shaped reinforcement. 25. Reinforcing rib; 26. Straight reinforcing rib; 27. Primary flow channel; 28. Secondary flow channel; 29. ​​Liquid collection tank; 30. Connecting hole; 31. Primary pipe connector; 32. Secondary pipe connector; 33. Infusion pipe; 34. Mounting beam; 35. Rotating shaft; 36. Centrifugal blade; 37. Drive motor; 38. Reducer; 39. Primary connecting flange; 40. Secondary connecting flange; 41. Primary connecting lug; 42. Secondary connecting lug; 43. Primary sealing groove; 44. Primary sealing strip; 45. Sealing seat; 46. Secondary sealing strip. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-10 The present invention provides the following three preferred embodiments:

[0034] Example 1: A mud circulation tank includes a circulation tank body 1 and a sludge removal mechanism 2. The circulation tank body 1 has a rectangular box structure, with an inlet 3 on the front end face and an outlet 4 on the rear end face. The bottom surface of the circulation tank body 1 is integrally formed with a primary accumulation hopper 5, a secondary accumulation hopper 6, a tertiary accumulation hopper 7, and a quaternary accumulation hopper 8. All four accumulation hoppers are hopper-shaped, with their upper ends connected to the inner cavity of the circulation tank body 1. Each of the primary accumulation hoppers has a mud discharge port 9 at its bottom. The sludge removal mechanism 2 is located at the primary accumulation hopper 5, secondary accumulation hopper 6, tertiary accumulation hopper 7, and quaternary accumulation hopper 8. Each of the sludge discharge ports 9 of the three-stage sludge collection hopper 6, the three-stage sludge collection hopper 7, and the four-stage sludge collection hopper 8 is equipped with one discharge port 9. The sludge dredging mechanism 2 consists of a sludge collection pipe 10, a piston 11, a telescopic cylinder 12, a first-stage sealing plate 13, and a second-stage sealing plate 14. By setting up a sludge circulation tank composed of a circulation tank 1 and the sludge dredging mechanism 2, and by setting up a first-stage sludge collection hopper 5, a second-stage sludge collection hopper 6, a three-stage sludge collection hopper 7, and a four-stage sludge collection hopper 8 on the bottom surface of the circulation tank 1, and by setting the sludge dredging mechanism 2 to be composed of a sludge collection pipe 10, a piston 11, a telescopic cylinder 12, a first-stage sealing plate 13, and a second-stage sealing plate 14, the sludge dredging mechanism 2 can achieve continuous sludge dredging work and reduce the water content in the discharged sludge. Thus, while ensuring the sludge dredging effect, it can effectively improve the utilization rate of the water body.

[0035] The mud collection pipe 10 and the mud discharge port 9 are integrally formed, and the lengths of the mud collection pipe 10 on both sides of the mud discharge port 9 are the same. The mud collection pipe 10 and the mud discharge port 9 are connected. The piston 11 is movably disposed in the mud collection pipe 10. The primary sealing plate 13 and the secondary sealing plate 14 are respectively fixed at both ends of the mud collection pipe 10. The secondary sealing plate 14 has a piston rod hole. The telescopic cylinder 12 is coaxially arranged with the mud collection pipe 10. The piston rod of the telescopic cylinder 12 passes through the piston rod hole and is fixedly connected to the piston 11. The length of the piston 11 is one-third of the length of the mud collection pipe 10, and the length of the piston 11 is greater than the diameter of the mud discharge port 9.

[0036] The outer walls at both ends of the sludge collection pipe 10 are respectively provided with a primary installation groove 15 and a secondary installation groove 16. Both the primary installation groove 15 and the secondary installation groove 16 are annular grooves, and the bottom of both the primary installation groove 15 and the secondary installation groove 16 are provided with through holes 17. Geotextile 18 is installed in both the primary installation groove 15 and the secondary installation groove 16. The geotextile 18 in the primary installation groove 15 and the secondary installation groove 16 is positioned by primary positioning component 19 and secondary positioning component 20, respectively. Both the primary positioning component 19 and the secondary positioning component 20 are composed of an upper positioning part 21 and a lower positioning part 22. Both the upper positioning part 21 and the lower positioning part 22 are semi-circular tube structures. The edge of the upper positioning part 21 is integrally formed with a primary connecting ear plate 41, and the edge of the lower positioning part 22 is integrally formed with a secondary connecting ear plate 42. The primary connecting ear plate 41 and the secondary connecting ear plate 42 are fixedly connected by primary bolts and nuts.

[0037] Both the upper positioning part 21 and the lower positioning part 22 are composed of an outer tube layer 23, an inner tube layer 24, an arc-shaped reinforcing rib 25, and a straight reinforcing rib 26. The outer tube layer 23, the inner tube layer 24, the arc-shaped reinforcing rib 25, and the straight reinforcing rib 26 are integrally formed. When the upper positioning part 21 and the lower positioning part 22 are aligned and connected, the outer tube layer 23 fits against the outer surface of the mud collection pipe 10, and the inner tube layer 24 is embedded into the primary installation groove 15 and the secondary installation groove 16. The arc-shaped reinforcing rib 25 and the straight reinforcing rib 26 form a mesh structure. During actual installation, the arc-shaped reinforcing rib 25 and the straight reinforcing rib 26... All 26 are offset from the through holes 17, and the arc-shaped reinforcing ribs 25 and the straight reinforcing ribs 26 are set against the geotextile 18. The geotextile 18 is positioned by the primary positioning component 19 and the secondary positioning component 20. The primary positioning component 19 and the secondary positioning component 20 are both composed of an upper positioning part 21 and a lower positioning part 22. The upper positioning part 21 and the lower positioning part 22 are both composed of an outer tube layer 23, an inner tube layer 24, an arc-shaped reinforcing rib 25 and a straight reinforcing rib 26. In this way, while ensuring the stability of the structural positioning, the efficiency of water passing through the geotextile 18 can be guaranteed, thereby effectively ensuring the overall dredging efficiency of the dredging mechanism 2.

[0038] The bottommost position of the lower positioning part 22 is provided with a liquid collection tank 29. The arc-shaped reinforcing ribs 25 and the straight reinforcing ribs 26 enclose a liquid collection cavity. The pair of liquid collection cavities at the bottom are connected to the liquid collection tank 29 through the connecting hole 30. The primary positioning component 19 and the secondary positioning component 20 are respectively provided with a primary pipe connector 31 and a secondary pipe connector 32. The primary pipe connector 31 and the secondary pipe connector 32 are connected through a liquid delivery pipe 33.

[0039] Example 2: Based on Example 1, a primary flow channel 27 is provided on the arc-shaped reinforcing rib 25, a secondary flow channel 28 is provided on the straight reinforcing rib 26, and adjacent liquid collection chambers are connected through the primary flow channel 27 and the secondary flow channel 28. A transparent observation port is provided on the side wall of the sludge discharge port 9.

[0040] A primary sealing groove 43 is provided at the edge of the inner tube layer 24. A primary sealing strip 44 is embedded in the primary sealing groove 43. When the inner tube layer 24 is embedded in the primary mounting groove 15 and the secondary mounting groove 16, the primary sealing strip 44 is in a compressed state. A sealing seat 45 is integrally formed on the secondary sealing plate 14 at the outer port of the piston rod hole. A secondary sealing groove is provided on the inner side wall of the sealing seat 45. A secondary sealing strip 46 is embedded in the secondary sealing groove. When the piston rod of the telescopic cylinder 12 passes through the sealing seat 45, the secondary sealing strip 46 is in a compressed state.

[0041] Example 3: Based on Example 2, the inlet 3 is located on the lower side of the circulation tank 1, and the outlet 4 is located on the upper side of the circulation tank 1, which allows impurities to be better precipitated and removed, thereby improving the separation effect of sludge.

[0042] The mud collection pipe 10 has a primary connecting flange 39 and a secondary connecting flange 40 integrally formed at both ends. Primary bolt holes are provided on both the primary connecting flange 39 and the secondary connecting flange 40. Secondary bolt holes are provided on both the primary sealing plate 13 and the secondary sealing plate 14. The primary sealing plate 13 and the secondary sealing plate 14 are fixedly connected to the primary connecting flange 39 and the secondary connecting flange 40 respectively by bolts and nuts. A nut groove is provided at the inner end of the primary bolt hole, and the size of the nut groove matches the size of the bolt nut. When the bolt is actually installed, the bolt nut is embedded in the nut groove. The nut groove limits the bolt nut, thereby facilitating the disassembly and assembly of the primary sealing plate 13 and the secondary sealing plate 14.

[0043] Four mounting beams 34 are fixedly installed between the side walls of the circulation tank 1. The four mounting beams 34 are aligned with the center positions of the primary accumulation hopper 5, the secondary accumulation hopper 6, the tertiary accumulation hopper 7, and the quaternary accumulation hopper 8, respectively. A rotating shaft 35 is rotatably mounted on the mounting beam 34. Centrifugal blades 36 are fixedly installed at the bottom of the rotating shaft 35. A drive motor 37 and a reducer 38 are fixedly installed on the top surface of the circulation tank 1. The rotating shaft of the drive motor 37 is connected to the input shaft of the reducer 38, and the output shaft of the reducer 38 is connected to the rotating shaft 35. Through the arrangement of the rotating shaft 35 and the centrifugal blades 36, when the rotating shaft 35 and the centrifugal blades 36 rotate, the sludge and impurities can be better collected and settled at the center position of the accumulation hopper, thereby further improving the cleaning effect of sludge.

[0044] Working principle: When water containing silt is discharged into the circulation tank 1 through the inlet 3, the silt in the water will settle into the sludge hopper and be discharged into the sludge collection pipe 10 through the sludge discharge port 9. When a certain amount of silt accumulates in the sludge collection pipe 10, the piston 11 is driven by the telescopic cylinder 12 to squeeze out the water in the silt. The water then passes through the through hole 17 and the geotextile 18, flows into the collection chamber, and flows through the primary flow channel 27 and the secondary flow channel 28 to the bottom collection chamber. It then flows along the connecting hole 30 to the collection tank 29 and finally flows through the delivery pipe 33 to the other side of the sludge collection pipe 10, thus achieving the separation of water and silt. When the silt is squeezed to a certain extent, the operator removes the primary sealing plate 13 or the secondary sealing plate 14 on the corresponding side and continues to drive the telescopic cylinder 12 to push out the silt in the sludge collection pipe 10.

[0045] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A mud circulation tank, characterized in that: include: The circulating tank (1) is a rectangular box structure. The front end face of the circulating tank (1) is provided with a liquid inlet (3), and the rear end face of the circulating tank (1) is provided with a liquid outlet (4). The bottom surface of the circulating tank (1) is integrally formed with a primary accumulation hopper (5), a secondary accumulation hopper (6), a tertiary accumulation hopper (7) and a quaternary accumulation hopper (8). The primary accumulation hopper (5), the secondary accumulation hopper (6), the tertiary accumulation hopper (7) and the quaternary accumulation hopper (8) are all arranged in a bucket shape. The upper end of the primary accumulation hopper (5), the secondary accumulation hopper (6), the tertiary accumulation hopper (7) and the quaternary accumulation hopper (8) are connected to the inner cavity of the circulating tank (1). The bottom of the primary accumulation hopper (5), the secondary accumulation hopper (6), the tertiary accumulation hopper (7) and the quaternary accumulation hopper (8) are all formed with a mud discharge port (9). The dredging mechanism (2) is provided at the mud discharge port (9) of the first-stage accumulation hopper (5), the second-stage accumulation hopper (6), the third-stage accumulation hopper (7), and the fourth-stage accumulation hopper (8). The dredging mechanism (2) consists of a mud collection pipe (10), a piston (11), a telescopic cylinder (12), a first-stage sealing plate (13), and a second-stage sealing plate (14).

2. A mud circulation tank according to claim 1, characterized in that: The sludge collection pipe (10) and the sludge discharge port (9) are integrally formed, and the length of the sludge collection pipe (10) on both sides of the sludge discharge port (9) is the same. The sludge collection pipe (10) and the sludge discharge port (9) are connected. The piston (11) is movably disposed in the sludge collection pipe (10). The first-stage sealing plate (13) and the second-stage sealing plate (14) are respectively fixed at both ends of the sludge collection pipe (10). The second-stage sealing plate (14) is provided with a piston rod hole. The telescopic cylinder (12) is coaxially arranged with the sludge collection pipe (10). The piston rod of the telescopic cylinder (12) passes through the piston rod hole and is fixedly connected to the piston (11). The length of the piston (11) is one-third of the length of the sludge collection pipe (10), and the length of the piston (11) is greater than the diameter of the sludge discharge port (9).

3. A mud circulation tank according to claim 2, characterized in that: The outer walls of both ends of the sludge collection pipe (10) are respectively provided with a primary installation groove (15) and a secondary installation groove (16). Both the primary installation groove (15) and the secondary installation groove (16) are annular grooves, and the bottom of both the primary installation groove (15) and the secondary installation groove (16) are provided with through holes (17). Geotextile (18) is installed in both the primary installation groove (15) and the secondary installation groove (16). The geotextile (18) in the primary installation groove (15) and the secondary installation groove (16) are respectively positioned by a primary positioning element (19) and a secondary positioning element (16). Positioning component (20) is used for positioning. The first-level positioning component (19) and the second-level positioning component (20) are both composed of an upper positioning part (21) and a lower positioning part (22). The upper positioning part (21) and the lower positioning part (22) are both semi-circular tube structures. The edge of the upper positioning part (21) is integrally formed with a first-level connecting ear plate (41), and the edge of the lower positioning part (22) is integrally formed with a second-level connecting ear plate (42). The first-level connecting ear plate (41) and the second-level connecting ear plate (42) are fixedly connected by a first-level bolt and nut.

4. A mud circulation tank according to claim 3, characterized in that: The upper positioning part (21) and the lower positioning part (22) are both composed of an outer tube layer (23), an inner tube layer (24), an arc-shaped reinforcing rib (25), and a straight reinforcing rib (26). The outer tube layer (23), the inner tube layer (24), the arc-shaped reinforcing rib (25), and the straight reinforcing rib (26) are integrally formed. When the upper positioning part (21) and the lower positioning part (22) are aligned and connected, the outer tube layer (23) fits against the outer surface of the sludge collection pipe (10), and The inner tube layer (24) is embedded in the first-level installation groove (15) and the second-level installation groove (16). The arc-shaped reinforcing ribs (25) and the straight reinforcing ribs (26) are enclosed to form a mesh structure. When the upper positioning part (21) and the lower positioning part (22) are actually installed, the arc-shaped reinforcing ribs (25) and the straight reinforcing ribs (26) are offset from the through hole (17), and the arc-shaped reinforcing ribs (25) and the straight reinforcing ribs (26) are abutted against the geotextile (18).

5. A mud circulation tank according to claim 4, characterized in that: The bottommost position of the lower positioning part (22) is provided with a liquid collection tank (29). The arc-shaped reinforcing ribs (25) and the straight reinforcing ribs (26) enclose a liquid collection cavity. The pair of liquid collection cavities at the bottom are connected to the liquid collection tank (29) through a connecting hole (30). The primary positioning component (19) and the secondary positioning component (20) are respectively provided with a primary pipe connector (31) and a secondary pipe connector (32). The primary pipe connector (31) and the secondary pipe connector (32) are connected through a liquid delivery pipe (33).

6. A mud circulation tank according to claim 5, characterized in that: The arc-shaped reinforcing rib (25) has a primary flow channel (27), the straight reinforcing rib (26) has a secondary flow channel (28), and adjacent liquid collection chambers are connected through the primary flow channel (27) and the secondary flow channel (28). The side wall of the sludge discharge port (9) has a transparent observation port.

7. A mud circulation tank according to claim 5, characterized in that: A primary sealing groove (43) is provided at the edge of the inner tube layer (24), and a primary sealing strip (44) is embedded in the primary sealing groove (43). When the inner tube layer (24) is embedded in the primary mounting groove (15) and the secondary mounting groove (16), the primary sealing strip (44) is in a compressed state. A sealing seat (45) is integrally formed on the secondary sealing plate (14) at the outer port of the piston rod hole. A secondary sealing groove is provided on the inner side wall of the sealing seat (45), and a secondary sealing strip (46) is embedded in the secondary sealing groove. When the piston rod of the telescopic cylinder (12) passes through the sealing seat (45), the secondary sealing strip (46) is in a compressed state.

8. A mud circulation tank according to claim 1, characterized in that: The inlet (3) is located on the lower side of the circulation tank (1), and the outlet (4) is located on the upper side of the circulation tank (1).

9. A mud circulation tank according to claim 1, characterized in that: The two ends of the sludge collection pipe (10) are integrally formed with a primary connecting flange (39) and a secondary connecting flange (40). The primary connecting flange (39) and the secondary connecting flange (40) are provided with primary bolt holes. The primary sealing plate (13) and the secondary sealing plate (14) are provided with secondary bolt holes. The primary sealing plate (13) and the secondary sealing plate (14) are fixedly connected to the primary connecting flange (39) and the secondary connecting flange (40) respectively by bolts and nuts. A nut groove is provided at the inner end of the primary bolt hole, and the size of the nut groove matches the size of the bolt nut. When the bolt is actually installed, the bolt nut is embedded in the nut groove.

10. A mud circulation tank according to claim 1, characterized in that: Mounting beams (34) are fixedly installed between the side walls of the circulating tank (1). There are four mounting beams (34), and the four mounting beams (34) are respectively aligned with the center positions of the first-level accumulation hopper (5), the second-level accumulation hopper (6), the third-level accumulation hopper (7), and the fourth-level accumulation hopper (8). A rotating shaft (35) is rotatably installed on the mounting beams (34). Centrifugal blades (36) are fixedly installed at the bottom of the rotating shaft (35). A drive motor (37) and a reducer (38) are fixedly installed on the top surface of the circulating tank (1). The rotating shaft of the drive motor (37) is connected to the input shaft of the reducer (38), and the output shaft of the reducer (38) is connected to the rotating shaft (35).

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