Super-long-distance drilling suspension deslagging device

Abstract

The utility model provides an ultra-long distance drilling suspension deslagging device which comprises a coal suspension solution, a pressure device and a drilling machine, the pressure device is communicated with the coal suspension solution and the drilling machine, the density of the coal suspension solution is larger than that of waste residues, and the coal suspension solution flows out through the drilling machine for deslagging. The method has the beneficial effects that the coal suspension solution is used for replacing mine water to serve as a deslagging medium, waste residues in a deposited state in an ultra-long-distance drill hole and a low-lying position after longitudinal fluctuation of the drill hole are changed into waste residues suspended in the solution, contact between the deposited waste residues and a hole wall and a drill rod is reduced, friction resistance is reduced, the waste residues in the low-lying position are effectively discharged, and the deslagging efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mine slag discharge, in particular to an ultra-long-distance drilling suspension slag discharge device. Background Art

[0002] There are nearly 2,000 high-gas and high-burst mines in my country. Drilling to extract gas is one of the main means of gas management and prevention in high-gas and high-burst mines. With the improvement of mine production efficiency and the development of drilling equipment and drilling technology, the application of ultra-long-distance drilling has become more and more extensive. However, during the drilling of ultra-long-distance drilling, the problem of poor slag discharge leading to low drilling efficiency or inability to continue drilling is often encountered.

[0003] The existing Chinese patent is named "Inert Gas Drilling and Deslagging Equipment and Method", and the publication number is CN112228068A, which discloses an inert gas drilling and deslagging equipment, wherein an inert gas channel is provided inside a drill pipe, and an exhaust hole connected to the inert gas channel is provided at the front end of the drill pipe. The power end of the drilling rig is connected to the drill pipe, and the gas output end of the mobile inert gas device is connected to the inert gas channel in the drill pipe through an inert gas injection hose. A casing is provided in the middle of the drill pipe, and the casing is arranged outside the borehole and closes the borehole opening. The casing is connected to a gas-slag separator through a gas-slag conveying pipe; the mobile inert gas device inputs inert gas to the bottom of the borehole when the drill pipe is drilling, and the gas in the hole and the slag generated by drilling enter the gas-slag separator. The inert gas drilling and deslagging equipment can reduce the accidents of hole collapse and hole blockage during the drilling construction process, and avoid the problem of gas combustion in the borehole caused by air compressed air deslagging. However, gas deslagging is not suitable for ultra-long-distance drilling. Ultra-long-distance drilling is rock drilling. If inert gas drilling and deslagging equipment is used to deslagging ultra-long-distance drilling, the rock layer is hard and the rock dust generated is very harmful. It is also easy to generate high temperature and the drill bit damage rate of the drilling rig is high.

[0004] The existing Chinese patent is named "A drainage and slag removal device for fractured coal rock mass", and the publication number is CN109184786A, which discloses a drainage and slag removal device for fractured coal rock mass, including a cylinder submerged in a descending borehole and a drainage pipe inserted into the lower part of the cylinder, and also includes an air blowing pipe, the outlet end of the air blowing pipe is flush with the bottom of the cylinder; the top of the cylinder is provided with a cover, and the bottom is provided with a one-way conduction mechanism; the cylinder is provided with an air intake and exhaust device; the air intake and exhaust device sucks the accumulated water in the borehole into the cylinder through the one-way conduction mechanism when exhausting, and presses the accumulated water out of the borehole through the drainage pipe when intake. In the prior art, water is used for slag removal, but water cannot discharge the waste slag in the low-lying areas formed by the longitudinal undulation of the borehole, and cannot promptly solve the problem of waste slag blocking the borehole, resulting in low slag removal efficiency, thereby resulting in low drilling efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to discharge waste slag in low-lying areas and improve the slag discharge efficiency.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] The utility model provides an ultra-long-distance drilling suspended slag removal device, comprising a coal suspension solution, a pressure device, and a drilling rig, wherein the drilling rig comprises a plurality of drill rods connected end to end, and a drill bit fixed at the front end of the drill rod; at least one of the plurality of drill rods is configured as a speed-increasing connecting rod; the rod body of the speed-increasing connecting rod is provided with a jet hole, and the jet hole is configured to be arranged from the inner wall to the outer wall of the speed-increasing connecting rod toward the orifice, and the speed-increasing connecting rod is located between the low-lying part of the ultra-long-distance drilling hole and the bottom of the hole; the pressure device is configured to pressurize the coal suspension solution and flow it into the drill rod and the drill bit in sequence, and the coal suspension solution flows out from the drill bit and the jet hole, and the density of the coal suspension solution is greater than that of the mixture of waste slag and water.

[0008] Beneficial effects: The present application uses a coal suspension solution to replace mine water as a slag discharge medium, suspends the waste slag deposited in ultra-long-distance drilling and in the low-lying areas after the longitudinal undulation of the drilling in the solution, and uses the coal suspension solution to carry the waste slag to flow out to the hole mouth, thereby effectively discharging the waste slag in the ultra-long-distance drilling hole and improving the slag discharge efficiency; the waste slag suspended in the solution also reduces the contact between the waste slag and the hole wall and drill rod, reduces the friction resistance, is beneficial to the drilling activity of the drill rod and drill bit, and improves the drilling efficiency.

[0009] The position of the speed-increasing connecting rod in this application is based on geological exploration and engineering design. The ultra-long-distance drilling depth and the location of the low-lying area are known. The engineering personnel design the drill rod length and the position of the speed-increasing connecting rod on the entire drill rod based on the drilling depth and the location of the low-lying area to ensure that when the drilling depth reaches the set value, the speed-increasing connecting rod is located between the low-lying area and the bottom of the hole.

[0010] The present application sprays the coal suspension solution through the jet hole of the speed-increasing connecting rod, and the direction of the spray is toward the orifice, which is conducive to the coal suspension solution to quickly flow out of the orifice with the waste slag, thereby improving the slag discharge efficiency. When the speed-increasing connecting rod is located between the low-lying area and the bottom of the ultra-long-distance borehole, it is beneficial to disturb the waste slag suspended in the coal suspension solution, increase the power of the solution flow, and also help solve the problem of waste slag blocking the borehole, effectively discharge the low-lying area and the blocked waste slag, and further improve the slag discharge efficiency.

[0011] Preferably, the speed increasing connecting rod is located in a low-lying area of ​​the ultra-long-distance drilling hole close to the bottom of the hole.

[0012] Preferably, the speed increasing connecting rod is located at a position one third of the distance from the bottom of the hole.

[0013] Preferably, the speed increasing connecting rod is located in a low-lying area close to the bottom of the hole and is not less than one-third of the distance from the bottom of the hole.

[0014] Preferably, it further comprises a proportioning box, wherein the proportioning box is used to prepare the coal suspension solution, and the liquid outlet of the proportioning box is connected to the pressure equipment.

[0015] Preferably, the density of the coal suspension solution is greater than 2 g / cm 3 of solution.

[0016] Preferably, the coal suspension solution is a Na2SO4 solution.

[0017] Preferably, the pressure equipment is a pressure pipeline or a pump truck.

[0018] The advantages of the utility model are:

[0019] 1. The present application uses a coal suspension solution to replace mine water as a slag discharge medium, suspends the waste slag deposited in ultra-long-distance drilling and in the low-lying areas after the longitudinal undulation of the drilling in the solution, and uses the coal suspension solution to carry the waste slag to flow out of the hole mouth, thereby effectively discharging the waste slag in the ultra-long-distance drilling hole and improving the slag discharge efficiency; the waste slag suspended in the solution also reduces the contact between the waste slag and the hole wall and drill rod, reduces the friction resistance, is beneficial to the drilling activity of the drill rod and the drill bit, and improves the drilling efficiency.

[0020] 2. The application sprays the coal suspension solution through the conical jet hole of the speed-increasing connecting rod, and the direction of the spray is toward the hole mouth, which is conducive to the coal suspension solution to quickly flow out of the hole mouth with the waste residue, thereby improving the slag discharge efficiency. When the speed-increasing connecting rod is in the low-lying area of ​​the ultra-long-distance borehole or one-third of the distance from the bottom of the hole, it is beneficial to disturb the waste residue suspended in the coal suspension solution, increase the power of the solution flow, and also help solve the problem of waste residue blocking the borehole, effectively discharge the waste residue in the low-lying area and the blockage, and further improve the slag discharge efficiency.

[0021] 3. When the drilling construction reaches the target depth, the coal suspension solution is re-prepared to form a supersaturated solution to wash the borehole. Granular crystals can be left in the borehole channel to absorb moisture from the coal wall of the borehole, open the pore channels of the coal wall, and improve the gas extraction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the ultra-long-distance drilling suspension slag removal device in the embodiment;

[0023] Figure 2 is a schematic structural diagram of a speed increasing connecting rod in an embodiment;

[0024] Figure 3 is a schematic cross-sectional view of the speed increasing connecting rod AA' in the embodiment;

[0025] Figure 4 Schematic diagram of the structure of the ultra-long-distance drilling suspension slag removal device in the embodiment;

[0026] In the figure: 1-proportioning box; 2-coal suspension solution; 3-pressure equipment; 4-drilling rig; 5-drill rod; 6-speed increasing connecting rod; 61-conical jet hole; 7-drill bit; 8-waste slag. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; it should be noted that, unless otherwise clearly specified and limited, the terms "connection" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] The operating premise of this embodiment is that the ultra-long-distance drilling depth and the location of the low-lying area are known based on geological exploration and engineering design. The engineering personnel design the drill rod length and the position of the speed-increasing connecting rod on the entire drill rod based on the drilling depth and the location of the low-lying area to ensure that when the drilling depth reaches the set value, the speed-increasing connecting rod is located between the low-lying area and the bottom of the hole.

[0030] Example 1

[0031] refer to Figure 1-3 This embodiment is designed for the situation where the low-lying part of the ultra-long-distance drilling hole is close to the bottom of the hole. This embodiment provides an ultra-long-distance drilling suspended slag discharge device, including a proportioning box 1, a coal suspension solution 2, a pressure device 3, and a drilling rig 4.

[0032] The proportioning box 1 is used to prepare the coal suspension solution 2, so the coal suspension solution 2 is placed in the proportioning box 1. The size of the proportioning box 1 is not limited as long as it can prepare the solution. The size of the proportioning box 1 can also be determined according to the size of the ultra-long-distance construction borehole. The proportioning box 1 can use a box that can prepare the solution in the coal mine.

[0033] The density of the coal suspension solution 2 is greater than that of the mixture of waste slag 8 and water. It is known that the average density of the mixture of waste slag 8 and water is 1.3 g / cm 3 Therefore, the density of coal suspension solution 2 is greater than 1.3 g / cm 3 The preferred density of the coal suspension solution 2 is greater than 2 g / cm 3 In this embodiment, Na2SO4 solution (density 2.68 g / cm 3 ).

[0034] The present application uses a coal suspension solution 2 for mine drilling slag removal. The solution has good fluidity and suspension properties, and can suspend the deposited waste slag 8 in the solution in ultra-long-distance drilling and in the low-lying areas after the longitudinal undulation of the drilling, thereby reducing the contact between the waste slag 8 and the borehole wall and the drill bit, greatly reducing the friction, and finally discharging the waste slag 8 from the ultra-long-distance drilling hole through the coal suspension solution 2, effectively discharging the waste slag 8 in the low-lying areas and improving the slag removal efficiency.

[0035] The pressure device 3 is configured to pressurize the coal suspension solution 2. The pressure device 3 is a pressure pipeline or a pump truck. In this embodiment, a pump truck is used. The liquid inlet of the pump truck is connected to the liquid outlet of the proportioning box 1, and the liquid outlet of the pump truck is connected to the drilling rig 4.

[0036] The drilling rig 4 includes a plurality of drill rods 5 connected end to end and a drill bit 7 fixed at the front end of the drill rods. At least one of the plurality of drill rods is configured as a speed increasing connecting rod 6. Figure 1 As shown, the speed-increasing connecting rod 6 is located at a low-lying part of the ultra-long-distance borehole close to the bottom of the hole, and the speed-increasing connecting rod 6 is located at a position greater than one-third of the bottom of the hole, and the nozzle of the speed-increasing connecting rod 6 is just aimed at the low-lying part of the ultra-long-distance borehole, so that the coal suspension solution 2 sprayed out from the jet hole 61 just falls into the low-lying part of the ultra-long-distance borehole, effectively disturbing the waste slag 8 suspended in the solution in the low-lying part, increasing the power of the solution flow, effectively displacing the waste slag 8 discharged from the low-lying part, keeping the channel of the ultra-long-distance borehole unobstructed, and further improving the slag discharge effect.

[0037] like Figure 2-3 As shown, the rod body of the speed-increasing connecting rod 6 is provided with a jet hole 61, and the jet hole 61 is configured to be arranged from the inner wall to the outer wall toward the orifice of the speed-increasing connecting rod 6. At the same time, the jet hole 61 located on the inner wall of the speed-increasing connecting rod 6 is a small-diameter hole, and the hole located on the outer wall of the speed-increasing connecting rod 6 is a large-diameter hole; the small-diameter is circular or elliptical, and the large-diameter is a special-shaped hole whose size gradually increases from the orifice to the bottom of the hole.

[0038] In this embodiment, the inner wall of the speed-increasing connecting rod 6 is small-diameter, and the outer wall of the rod is large-diameter, which gradually increases in size from the hole mouth to the bottom of the hole. The function is that when the inside of the speed-increasing connecting rod 6 is filled with the pressurized coal suspension solution, the coal suspension solution flows out from the small-diameter inner wall of the rod to the outer wall of the rod, and is first sprayed out from the outer wall of the rod close to the hole mouth, and then sprayed out from the direction close to the bottom of the hole. The reason is that the small-sized one is sprayed first and the large-sized one is sprayed later, so that the coal suspension solution sprayed from the speed-increasing connecting rod 6 has, first, a larger area, which is more conducive to hole washing for ultra-long-distance drilling, and second, it is sprayed first near the hole mouth, so that the coal suspension solution 2 flows out to the hole mouth more quickly.

[0039] In this embodiment, after the drilling construction reaches the target depth, the coal suspension solution 2 is re-prepared to form a supersaturated solution to wash the borehole, and granular crystals can be left in the borehole channel to absorb moisture from the coal wall of the borehole, thereby opening the micropore channels of the coal wall and improving the gas extraction effect.

[0040] Example 2

[0041] refer to Figure 2-4 This embodiment is designed for the situation where the low-lying part of the ultra-long-distance drilling hole is far from the bottom of the hole. The difference between this embodiment 2 and embodiment 1 is that the speed-increasing connecting rod 6 of this embodiment is located at one-third of the distance from the bottom of the hole.

[0042] The minimum distance between the speed-increasing connecting rod 6 and the bottom of the hole is one-third of the distance from the bottom of the hole. If the speed-increasing connecting rod 6 is located at a distance less than one-third of the distance from the bottom of the hole, then the speed-increasing connecting rod 6 is too close to the drill bit 7. During the drilling process of the drill bit 7, the fallen waste slag 8 blocks the jet hole 61 of the speed-increasing connecting rod 6, making it impossible for the coal suspension solution 2 to be sprayed out, and the speed-increasing connecting rod 6 cannot play its role.

[0043] like Figure 4 As shown, the speed increasing connecting rod 6 of the present embodiment is located at one third of the distance from the bottom of the hole, and the jet hole 61 sprays the coal suspension solution 2 which falls at one third of the distance from the bottom of the hole. The coal suspension solution 2 disturbs most of the waste slag 8 suspended in the solution of the ultra-long-distance drilling hole, including the waste slag 8 in the low-lying areas of the ultra-long-distance drilling hole, thereby increasing the power of the ultra-long-distance drilling hole solution flow, effectively displacing the waste slag 8 in the ultra-long-distance drilling hole, keeping the channel of the ultra-long-distance drilling hole unobstructed, and further improving the slag discharge effect.

[0044] Example 3

[0045] In order to allow the coal suspension solution 2 in the ultra-long-distance borehole to flow out of the hole more quickly, this embodiment is designed for the situation where the low-lying part of the ultra-long-distance borehole is far from the bottom of the hole. The difference between this embodiment and embodiment 2 is that two speed-increasing connecting rods 6 are provided in this embodiment, which are respectively located at a position near the bottom of the hole and a position one-third of the distance from the bottom of the hole in the low-lying part of the ultra-long-distance borehole.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultra-long-distance drilling suspension slag removal device, characterized in that: The invention comprises a coal suspension solution (2), a pressure device (3) and a drilling rig (4), wherein the drilling rig (4) comprises a plurality of drill rods (5) connected end to end and a drill bit (7) fixed at the front end of the drill rods, and at least one of the plurality of drill rods (5) is configured as a speed increasing connecting rod (6); The rod body of the speed-increasing connecting rod (6) is provided with a jet hole (61), and the jet hole (61) is configured to be inclined from the inner wall to the outer wall of the speed-increasing connecting rod toward the hole opening, and the speed-increasing connecting rod (6) is located between the low-lying part of the ultra-long-distance drilling hole and the bottom of the hole; The pressure device (3) is configured to pressurize the coal suspension solution (2) and flow it into the drill rod (5) and the drill bit (7) in sequence, and the coal suspension solution (2) flows out from the drill bit (7) and the jet hole (61). The density of the coal suspension solution (2) is greater than that of the mixture of waste slag (8) and water.

2. The ultra-long-distance drilling suspended slag removal device according to claim 1 is characterized in that: The speed increasing connecting rod (6) is located in a low-lying area of ​​the ultra-long-distance drilling hole close to the bottom of the hole.

3. The ultra-long-distance drilling suspended slag removal device according to claim 2 is characterized in that: The speed increasing connecting rod (6) is located at a position one third of the distance from the bottom of the hole.

4. The ultra-long-distance drilling suspended slag removal device according to claim 1 is characterized in that: The speed increasing connecting rod (6) is located in a low-lying area close to the bottom of the hole and at a position not less than one third of the distance from the bottom of the hole.

5. The ultra-long-distance drilling suspended slag removal device according to claim 1 is characterized in that: It also comprises a proportioning box (1), wherein the proportioning box (1) is used to prepare the coal suspension solution (2).

6. The ultra-long-distance drilling suspended slag removal device according to claim 1 is characterized in that: The density of the coal suspension solution (2) is greater than 2 g / cm 3 of solution.

7. The ultra-long-distance drilling suspended slag removal device according to claim 6 is characterized in that: The coal suspension solution is a Na2SO4 solution.

8. The ultra-long-distance drilling suspended slag removal device according to claim 1 is characterized in that: The pressure equipment (3) is a pressure pipeline or a pump truck.

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