Environment-friendly drilling flushing fluid circulating device

Abstract

The utility model belongs to the technical field of geological exploration equipment, and particularly discloses an environment-friendly drilling flushing fluid circulating device. The device comprises a circulating tank assembly and a plugging ring, the circulating tank assembly comprises a precipitation tank, at least two lifting lugs and a slurry outlet cylinder, the lifting lugs are arranged on the outer wall of the precipitation tank, the slurry outlet cylinder is of a tubular structure, the inner diameter of the slurry outlet cylinder is larger than the outer diameter of a drill rod, the outer diameter of the slurry outlet cylinder is smaller than the hole diameter of a drill hole, and the slurry outlet cylinder fixedly penetrates through the bottom end of the precipitation tank. The plugging ring sleeves the slurry outlet cylinder below the precipitation tank, and the outer diameter of the plugging ring is not smaller than the hole diameter of the drill hole. The circulating groove assembly and the plugging ring form an integrated portable structure, excavation work of a mud pit of an exploration construction site can be reduced, in-situ sedimentation of mud is achieved through the sedimentation groove, directional flowing of the mud is achieved through the mud outlet cylinder, it can be guaranteed that the mud does not leak outwards and is fully recycled, and the construction efficiency is improved. The device has the advantages of being simple in structure, convenient to move, free of slurry leakage, smooth in deslagging and small in occupied space.

Description

TECHNICAL FIELD

[0001] The utility model belongs to geological exploration equipment technical field, concretely relates to a kind of environmental protection type drilling flushing fluid circulating device with simple structure, it is convenient to move, mud does not leak, slag is smoothly discharged, and it occupies small space. BACKGROUND

[0002] Engineering geological drilling is a kind of exploration method using drilling tool to drill into rock-soil layer to form borehole, then taking out rock-soil sample, identifying stratum or carrying out in-situ test. Among them, rotary drilling is the most widely used drilling technology. Rotary drilling machine needs to use flushing fluid to cool drill bit and drilling tool, suspend and carry out rock debris during rotary drilling process, in addition, flushing fluid also plays the function of balancing ground pressure, preventing hole wall collapse and lubricating drilling tool to reduce drilling tool wear. Therefore, normal circulation of flushing fluid is the basis to ensure the smooth progress of engineering geological drilling.

[0003] In traditional rotary drilling work, mud is often used as flushing fluid, so mud pool is excavated near borehole to store and deploy mud, so that mud can be normally circulated as flushing fluid. However, manual excavation of mud pool has the following disadvantages: excavation of mud pool will damage the ground, especially when urban road surveying, it is not only difficult to excavate, but also has high recovery cost, and also affects the environmental aesthetics; and directly excavating mud pool to store mud in soil body is also easy to cause mud leakage, which leads to environmental pollution and slurry waste, and it is also difficult to be recycled, which is not conducive to environmental protection; at the same time, the excavated mud pit needs to be backfilled after drilling is completed, which increases the drilling workload and is not convenient to use.

[0004] Therefore, in the prior art, ground storage tank is arranged near borehole, and overflowed mud is directly guided to storage tank by pipeline, then mud is pumped into drill pipe by mud pump and pipeline, so as to avoid the inconvenience of excavating mud pool on ground; however, since overflowed mud needs to be guided to storage tank by pipeline, sealing structure needs to be used between drill pipe and slag discharge pipe, which not only leads to complex structure, but also causes trouble in later maintenance, and storage tank needs to occupy additional ground space, which affects well site layout. In addition, in the prior art, movable flushing fluid circulating vehicle is provided, electric control system is arranged on the top of flushing fluid circulating vehicle, waste liquid input pipe and purified liquid output pipe are arranged on flushing fluid circulating vehicle, and flushing fluid purification circulating system is arranged between waste liquid input pipe and purified liquid output pipe inside flushing fluid circulating vehicle; so that flushing fluid can be recycled and purified without falling to the ground, which solves the problem that flushing fluid waste directly accumulates in flushing fluid pool, leading to serious pollution at construction site, large waste of flushing fluid resources and recycling difficulty, and also facilitates flexible and on-demand movement and recycling. However, sealing structure also needs to be arranged between drill pipe and slag discharge pipe, which causes the difficulty of complex structure and maintenance trouble, and also needs to occupy additional ground space.

[0005] Therefore, developing a flushing liquid circulating device with simple structure, convenient movement, no mud leakage, smooth slag discharge and small space occupation has positive practical significance for engineering geological drilling. The utility model discloses

[0006] According to the deficiencies of the prior art, the utility model discloses a simple structure, convenient movement, mud does not leak, the environmental protection type drilling flushing liquid circulating device of smooth slag discharge, small space occupation.

[0007] The utility model discloses a circulating tank subassembly and plugging ring, the circulating tank subassembly includes the sedimentation tank, the lug and the slurry outlet cylinder, at least two the lug is arranged on the outer wall of sedimentation tank respectively, the slurry outlet cylinder is tubular structure and the inner diameter is greater than the outer diameter of drill pipe, the outer diameter is less than the aperture of drill hole, the slurry outlet cylinder fixedly passes through the bottom end of sedimentation tank, the plugging ring is set up on the slurry outlet cylinder below sedimentation tank and the outer diameter is not less than the aperture of drill hole.

[0008] Further, the top end opening height of the slurry outlet cylinder is lower than the side wall height of the sedimentation tank.

[0009] Further, the plugging ring is a sponge ring, a rubber ring or an inflatable sleeve.

[0010] Further, the plugging ring is a cylindrical ring or an inverted conical ring with a large upper end and a small lower end, the lower end of the cylindrical ring is provided with a chamfer on the outer diameter side, and the lower end of the inverted conical ring has a small diameter smaller than the aperture of the drill hole and an upper end with a large diameter greater than the aperture of the drill hole.

[0011] Further, the top end of the inflatable sleeve is connected to a gas pipe extending through the bottom end of the sedimentation tank and extending to the outside or above the sedimentation tank, and the end of the gas pipe away from the inflatable sleeve is connected to a gas supply system.

[0012] Further, the sedimentation tank is an open slot with a circular or polygonal shape, the slurry outlet cylinder is fixedly penetrated through the center position of the bottom end of the sedimentation tank, and the at least two lugs are uniformly distributed on the outer wall of the sedimentation tank.

[0013] Further, the sedimentation tank is provided with a splash-proof cover, a plurality of support ears are fixedly arranged on the inner wall of the sedimentation tank in a circumferential direction, the splash-proof cover has an outer diameter smaller than the inner diameter of the sedimentation tank, the splash-proof cover is buckled on the sedimentation tank with the bottom end abutting on each support ear, and the top end of the splash-proof cover is further provided with through holes that can be penetrated by the drill pipe and the slurry pump pipeline.

[0014] Further, the splash-proof cover is adapted to the shape of the sedimentation tank, and the splash-proof cover is a cylindrical shape with an open bottom or a conical shape with a large lower end and a small upper end.

[0015] Furthermore, the top opening of the discharge cylinder is slanted, and the sedimentation tank is fixedly provided with two baffles at intervals on the side away from the lowest point of the slanted opening at the top of the discharge cylinder. The front and rear ends of the baffles are respectively sealed and fixedly connected to the inner wall of the sedimentation tank and the outer wall of the discharge cylinder. The bottom end of the baffle abuts against the bottom wall of the sedimentation tank, and the height of the baffle is lower than the lowest point of the slanted opening at the top of the discharge cylinder. A mud pump is provided between the two baffles of the sedimentation tank.

[0016] Furthermore, a slag discharge pipe is provided on the side wall of the sedimentation tank at the lowest point of the inclined opening near the top of the slurry outlet cylinder, and a slag discharge valve is provided on the slag discharge pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model uses a closed-loop circulation tank assembly (sedimentation tank + discharge cylinder) to replace the open-air mud pit, combined with sealing rings (such as sponge rings, rubber rings or inflatable sleeves) to seal the borehole, thereby avoiding the problem of mud leakage polluting the soil and groundwater; moreover, the sedimentation tank structure surrounding the discharge cylinder does not require the excavation of a mud pit, and the device can be directly installed using the borehole structure, which is especially suitable for sensitive areas such as urban road surveys, avoiding ground damage and restoration costs, and improving construction efficiency; and through the lifting lugs on the outer wall of the sedimentation tank, the device can be quickly hoisted and moved without complex earthwork, reducing the construction cycle and labor costs, thereby solving the environmental protection and construction problems of traditional mud pits.

[0019] 2. This utility model, by setting a slurry outlet cylinder that can pass through the drill rod, and the outer diameter of the slurry outlet cylinder is smaller than the borehole diameter, allows the flushing fluid carrying rock cuttings to enter the gap between the slurry outlet cylinder and the drill rod from the borehole with a larger cross-sectional area and overflow. Because the cross-sectional area of ​​the gap through which it passes is greatly reduced, the flow rate of the flushing fluid mixed with rock cuttings increases under pressure, which can quickly carry out the mixed rock cuttings and avoid the problem of rock cuttings settling to the bottom due to the low flow rate, thereby improving the smoothness of slag removal and drilling efficiency.

[0020] 3. The inner diameter of the discharge cylinder of this utility model is larger than the outer diameter of the drill pipe and the outer diameter is smaller than the borehole diameter. Combined with the top bevel design and baffle guidance, it can ensure that rock cuttings are efficiently discharged with the flushing fluid to reduce the risk of blockage, and can also block and retain rock cuttings in the sedimentation tank to prevent them from being pumped back into the borehole, thus improving the smoothness of slag discharge and the slag trapping effect. Moreover, the sedimentation tank surrounds the discharge cylinder to form an integrated and compact structure, so it occupies significantly less space than traditional storage tanks or mud pits. Since the mud overflows directly from the top of the discharge cylinder into the sedimentation tank, there is no need to set a sealing structure at the outlet end of the discharge cylinder, thereby simplifying the structure and reducing the amount of subsequent maintenance work, thus achieving the purpose of optimizing the flushing fluid circulation efficiency and space occupation.

[0021] 4. The sealing ring of this utility model adopts an adaptive sealing technology with an inverted conical ring or an inflatable sleeve design, which can adapt to drilling holes of different diameters and does not require a complex sealing structure (such as traditional pipeline sealing), reducing the risk of leakage and the difficulty of maintenance (such as the inflatable sleeve expanding through an air pipe to achieve dynamic sealing; the inverted conical ring automatically adhering to the hole wall by gravity); and by adding a splash guard that snaps onto the sedimentation tank, mud splashing can be reduced, thereby ensuring operational safety and avoiding the risk of mud leakage, thus improving sealing performance and ease of maintenance.

[0022] In summary, this utility model solves the pain points of traditional drilling flushing fluid storage and circulation with low cost and high reliability through structural innovation and functional integration. It is especially suitable for urban road surveys, environmentally sensitive areas (such as water sources and ecological protection areas), and short-term or mobile exploration projects. Furthermore, by improving environmental friendliness, economy, and ease of operation, it provides an effective solution for the sustainable development of engineering geological drilling. Attached Figure Description

[0023] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0024] Figure 2 for Figure 1 View from direction A;

[0025] Figure 3 This is the second structural schematic diagram of the present invention;

[0026] Figure 4 for Figure 3 BB-direction sectional view;

[0027] In the diagram: 1-Sedimentation tank, 2-Lifting lug, 3-Slurry discharge cylinder, 4-Sealing ring, 5-Drill rod, 6-Drill hole, 7-Splash cover, 8-Support lug, 9-Baffle, 10-Air pipe. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0029] like Figure 1 and 2 As shown, this utility model includes a circulation tank assembly and a sealing ring 4. The circulation tank assembly includes a sedimentation tank 1, lifting lugs 2, and a slurry discharge cylinder 3. At least two lifting lugs 2 are respectively disposed on the outer wall of the sedimentation tank 1. The slurry discharge cylinder 3 is a tubular structure with an inner diameter greater than the outer diameter of the drill rod 5 and an outer diameter smaller than the diameter of the drill hole 6. The slurry discharge cylinder 3 is fixedly inserted through the bottom end of the sedimentation tank 1. The sealing ring 4 is sleeved on the slurry discharge cylinder 3 below the sedimentation tank 1 and has an outer diameter not less than the diameter of the drill hole 6.

[0030] The height of the top opening of the discharge cylinder 3 is lower than the height of the side wall of the sedimentation tank 1.

[0031] The sealing ring 4 is a sponge ring, a rubber ring, or an inflatable sleeve.

[0032] The sealing ring 4 is a cylindrical ring or an inverted conical ring with a larger upper diameter and a smaller lower diameter. The lower outer diameter side of the cylindrical ring is chamfered, and the lower minor diameter of the inverted conical ring is smaller than the diameter of the borehole 6 and the upper major diameter is larger than the diameter of the borehole 6.

[0033] like Figure 3 and 4 As shown, the top of the inflatable sleeve is connected to an air pipe 10 that penetrates the bottom of the sedimentation tank 1 and extends to the outside or above the sedimentation tank 1. The end of the air pipe 10 away from the inflatable sleeve is connected to the air supply system.

[0034] The sedimentation tank 1 is a circular or polygonal open tank, the discharge cylinder 3 is fixedly inserted through the center of the bottom end of the sedimentation tank 1, and at least two lifting lugs 2 are evenly distributed on the outer wall of the sedimentation tank 1.

[0035] The sedimentation tank 1 is provided with a splash guard 7. Multiple support ears 8 are fixedly provided circumferentially on the upper part of the inner wall of the sedimentation tank 1. The outer diameter of the splash guard 7 is smaller than the inner diameter of the sedimentation tank 1. The splash guard 7 is fastened to the sedimentation tank 1 and its bottom end abuts against each support ear 8. The top of the splash guard 7 is also provided with through holes that can penetrate the drill rod 5 and the mud pump pipeline.

[0036] The splash guard 7 is adapted to the shape of the sedimentation tank 1. The splash guard 7 is a column with an open bottom or a cone shape with a larger bottom and a smaller top.

[0037] The top opening of the discharge cylinder 3 is slanted. Two baffles 9 are fixedly installed at intervals on the side of the sedimentation tank 1 away from the lowest point of the slanted opening at the top of the discharge cylinder 3. The front and rear ends of the baffles 9 are sealed and fixedly connected to the inner wall of the sedimentation tank 1 and the outer wall of the discharge cylinder 3, respectively. The bottom end of the baffles 9 abuts against the bottom wall of the sedimentation tank 1. The height of the baffles 9 is lower than the lowest point of the slanted opening at the top of the discharge cylinder 3. A mud pump is installed between the two baffles 9 of the sedimentation tank 1.

[0038] A slag discharge pipe is provided on the side wall of the sedimentation tank 1 at the lowest point of the inclined opening near the top of the slurry discharge cylinder 3, and a slag discharge valve is provided on the slag discharge pipe.

[0039] The working principle and process of this utility model:

[0040] like Figure 1 and 2As shown, sedimentation tank 1 is constructed from 0.8mm thick steel plates. The bottom consists of a single steel plate measuring 0.8m long x 0.8m wide, while the surrounding side walls are formed by four steel plates measuring 0.8m long x 0.35m wide, welded together to form a five-sided tank measuring 0.8m long x 0.8m wide x 0.35m high. The discharge cylinder 3 is a hollow cylinder, 10.8cm in diameter and 40cm high, formed by bending and welding a 40cm long x 34cm wide x 0.8mm thick steel plate. The lifting lugs 2 are made of 12cm long x 6mm diameter steel bars, bent and then symmetrically welded to the outer sides of both side walls of sedimentation tank 1. An 11cm diameter circle is cut at the center of the bottom of sedimentation tank 1. The discharge cylinder 3 passes through this circle and extends 20cm downwards before being securely welded together.

[0041] The sealing ring 4 is formed by rolling up a sponge to create a ring with an inner diameter of 10.8 cm and an outer diameter of 15 cm.

[0042] Drilling begins with dry drilling to a depth of 50cm. Then, the sealing ring 4 is placed on the discharge cylinder 3 below the settling tank 1. The discharge cylinder 3 at the bottom of the settling tank 1 is inserted into the borehole 6, ensuring the bottom of the settling tank 1 is flush with the ground at the borehole opening of the borehole 6. The sealing ring 4 is tightly inserted between the borehole 6 and the discharge cylinder 3, ensuring that the mud completely enters the circulation tank assembly. Next, clean water is added to the settling tank 1 until the water level is below the discharge cylinder 3. The clean water is then pumped into the borehole 6 using a mud pump and drill rod 5. If the water volume is insufficient during drilling, clean water is gradually added to the settling tank 1 until mud returns from the top opening of the discharge cylinder 3. The mud settles in the settling tank 1 and is then pumped back into the drill rod 5, achieving mud recycling.

[0043] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An environmentally friendly drilling flushing fluid circulation device, characterized in that: The system includes a circulation tank assembly and a sealing ring (4). The circulation tank assembly includes a sedimentation tank (1), lifting lugs (2) and a slurry discharge cylinder (3). At least two of the lifting lugs (2) are respectively installed on the outer wall of the sedimentation tank (1). The slurry discharge cylinder (3) is a tubular structure with an inner diameter greater than the outer diameter of the drill rod (5) and an outer diameter smaller than the diameter of the borehole (6). The slurry discharge cylinder (3) is fixedly inserted through the bottom end of the sedimentation tank (1). The sealing ring (4) is sleeved on the slurry discharge cylinder (3) below the sedimentation tank (1) and its outer diameter is not smaller than the diameter of the borehole (6).

2. The environmentally friendly drilling flushing fluid circulation device according to claim 1, characterized in that: The top opening height of the discharge cylinder (3) is lower than the side wall height of the sedimentation tank (1).

3. The environmentally friendly drilling flushing fluid circulation device according to claim 1, characterized in that: The sealing ring (4) is a sponge ring, a rubber ring, or an inflatable sleeve.

4. The environmentally friendly drilling flushing fluid circulation device according to claim 3, characterized in that: The sealing ring (4) is a cylindrical ring or an inverted conical ring with a larger upper diameter and a smaller lower diameter. The lower outer diameter side of the cylindrical ring is chamfered, and the lower small diameter of the inverted conical ring is smaller than the diameter of the borehole (6) and the upper large diameter is larger than the diameter of the borehole (6).

5. The environmentally friendly drilling flushing fluid circulation device according to claim 3, characterized in that: The top of the inflatable sleeve is connected to an air pipe (10) that penetrates the bottom of the sedimentation tank (1) and extends to the outside or above the sedimentation tank (1). The end of the air pipe (10) away from the inflatable sleeve is connected to the air supply system.

6. The environmentally friendly drilling flushing fluid circulation device according to any one of claims 1 to 5, characterized in that: The sedimentation tank (1) is a circular or polygonal open tank, the discharge cylinder (3) is fixedly inserted through the bottom center of the sedimentation tank (1), and at least two lifting lugs (2) are evenly distributed on the outer wall of the sedimentation tank (1).

7. The environmentally friendly drilling flushing fluid circulation device according to claim 6, characterized in that: The sedimentation tank (1) is provided with a splash guard (7). Multiple support ears (8) are fixedly provided on the upper part of the inner wall of the sedimentation tank (1). The outer diameter of the splash guard (7) is smaller than the inner diameter of the sedimentation tank (1). The splash guard (7) is fastened to the sedimentation tank (1) and its bottom end abuts against each support ear (8). The top of the splash guard (7) is also provided with through holes that can penetrate the drill rod (5) and the mud pump pipeline.

8. The environmentally friendly drilling flushing fluid circulation device according to claim 7, characterized in that: The splash guard (7) is adapted to the shape of the sedimentation tank (1), and the splash guard (7) is a column with an open bottom or a cone shape with a larger bottom and a smaller top.

9. The environmentally friendly drilling flushing fluid circulation device according to claim 6, characterized in that: The top opening of the discharge cylinder (3) is slanted. The sedimentation tank (1) has two baffles (9) fixedly installed at intervals on the side away from the lowest point of the slanted opening at the top of the discharge cylinder (3). The front and rear ends of the baffles (9) are sealed and fixedly connected to the inner wall of the sedimentation tank (1) and the outer wall of the discharge cylinder (3), respectively. The bottom end of the baffles (9) abuts against the bottom wall of the sedimentation tank (1). The height of the baffles (9) is lower than the lowest point of the slanted opening at the top of the discharge cylinder (3). A mud pump is installed between the two baffles (9) of the sedimentation tank (1).

10. The environmentally friendly drilling flushing fluid circulation device according to claim 9, characterized in that: A slag discharge pipe is provided on the side wall of the sedimentation tank (1) at the lowest point of the top inclined opening near the slurry discharge cylinder (3), and a slag discharge valve is provided on the slag discharge pipe.

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