Drilling, expanding and cutting integrated gas drainage hole construction device

Abstract

The utility model provides a drilling, reaming and cutting integrated gas drainage hole construction device which comprises a reaming part, a slotting part, a first high-low pressure converter and a second high-low pressure converter, one end of the reaming part is connected with a drill bit, the first high-low pressure converter is arranged in the reaming part, reaming drill bits are arranged on the two sides of the surface of the reaming part, and the slotting part is arranged at one end of the reaming part. A second high-low pressure converter is arranged in the slotting part, a sliding device is arranged on the slotting part, and a plurality of nozzles and an outer surface water outlet are formed in the sliding device. According to the drilling, expanding and cutting integrated gas drainage hole construction device, the gas permeability of a coal seam is improved, the gas extraction rate and the site construction efficiency are improved to the maximum extent, the tedious processes of repeated drill withdrawal, rod replacement and the like in split construction are reduced, the labor intensity of workers is greatly reduced, the cost is saved, and the economic benefits are improved; reaming of different hole diameters can be completed by adjusting water pressure, and the outer surface of the slotting part can achieve the effects of high-pressure slotting and low-pressure sealing through the design of a sliding cover.

Description

Technical Field

[0001] The utility model relates to the field of coal mining, in particular to a construction device for drilling, reaming and cutting integrated gas drainage holes. Background Technique

[0002] Coal still occupies a dominant position in China's energy. In mine production, derivative disasters such as gas and impact are the main factors restricting the safe production of coal mines.

[0003] In recent years, the technology of using holes instead of roadways has become increasingly mature. Long-distance borehole drainage and fracturing play a key role in current mine disaster control. During the construction of soft coal and rock strata and cross-layer boreholes with conventional drill bits, problems such as hole collapse and drill jamming often occur, and the construction process is accompanied by problems such as large workload, difficulty in forming holes, and low gas drainage concentration.

[0004] In recent years, multi-stage composite variable-diameter reaming technologies have emerged one after another and have been developed and matured. Although the problem of reaming has been solved, in order to improve the drainage concentration, it is still necessary to withdraw the original drill pipe and then re-insert the slitting device to increase the gas permeability, resulting in low overall efficiency, large workload, and high labor intensity.

[0005] Therefore, it is necessary to provide a construction device for drilling, reaming and cutting integrated gas drainage holes to solve the above technical problems. Content of the Utility Model

[0006] The utility model provides a construction device for drilling, reaming and cutting integrated gas drainage holes, which solves the problem of hole collapse during soft coal and rock strata or cross-layer drilling.

[0007] To solve the above technical problems, a construction device for drilling, reaming and cutting integrated gas drainage holes provided by the utility model includes:

[0008] A reaming part, one end of the reaming part is connected with a drill bit, a first high-low pressure converter is arranged inside the reaming part, and reaming drill bits are arranged on both sides of the surface of the reaming part;

[0009] A slitting part, the slitting part is arranged at one end of the reaming part, a second high-low pressure converter is arranged inside the slitting part, a sliding device is arranged on the slitting part, and a plurality of nozzles and an outer surface water outlet are respectively arranged on the sliding device.

[0010] Preferably, a placement groove adapted to the reaming drill bit is formed on the surface of the reaming part.

[0011] Preferably, the drill bit, the reaming part and the slitting part are connected by thread screw threads.

[0012] Preferably, the first high-low pressure converter and the second high-low pressure converter are used for cooling and discharging slag.

[0013] Preferably, a connection component is provided between the slotted portion and the reaming bit. The connection component includes a mounting sleeve, and an installation block is arranged inside the mounting sleeve. One end of the installation block is connected to one end of the reaming bit.

[0014] Preferably, a threaded bolt is provided between the mounting sleeve and the installation block.

[0015] Preferably, fixing blocks are connected to both sides of the mounting sleeve, and bolts are arranged inside the fixing blocks.

[0016] Compared with the related technology, a drilling, reaming and slitting integrated gas drainage hole construction device provided by the present utility model has the following beneficial effects:

[0017] The present utility model provides a drilling, reaming and slitting integrated gas drainage hole construction device, which increases the coal seam permeability, maximizes the gas extraction rate and the on-site construction efficiency, reduces the cumbersome processes such as multiple drill withdrawals and rod replacements in split construction, greatly reduces the labor intensity of workers, saves costs, improves economic benefits, can complete reaming with different hole diameters by adjusting the water pressure, and can achieve the effects of high-pressure slitting and low-pressure sealing through the sliding cover design on the outer surface of the slotted portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a first embodiment of a drilling, reaming and slitting integrated gas drainage hole construction device provided by the present utility model;

[0019] Figure 2 is a schematic structural diagram of a second embodiment of a drilling, reaming and slitting integrated gas drainage hole construction device provided by the present utility model;

[0020] Figure 3 is Figure 2 an enlarged schematic view of part A shown in

[0021] Reference numerals in the figures: 1, drill bit; 2, first high-low pressure converter; 3, reaming bit; 4, nozzle; 5, second high-low pressure converter; 6, sliding device; 7, outer water outlet; 8, reaming portion; 9, slotted portion; 10, placement groove;

[0022] 11, connection component; 111, mounting sleeve; 112, installation block; 113, threaded bolt; 114, fixing block; 115, bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0024] First Embodiment

[0025] Please refer to Figure 1 , wherein, Figure 1Schematic diagram of the structure of the first embodiment of a drilling, reaming and slotting integrated gas drainage hole construction device provided by the present utility model. A drilling, reaming and slotting integrated gas drainage hole construction device includes:

[0026] A reaming part 8, one end of the reaming part 8 is connected with a drill bit 1, a first high-low pressure converter 2 is arranged inside the reaming part 8, and reaming bits 3 are arranged on both sides of the surface of the reaming part 8;

[0027] A slotting part 9, the slotting part 9 is arranged at one end of the reaming part 8, a second high-low pressure converter 5 is arranged inside the slotting part 9, a sliding device 6 is arranged on the slotting part 9, and a plurality of nozzles 4 and an outer surface water outlet 7 are respectively arranged on the sliding device 6.

[0028] A placement groove 10 adapted to the reaming bit 3 is formed on the surface of the reaming part 8.

[0029] The drill bit 1, the reaming part 8 and the slotting part 9 are connected by thread taps.

[0030] The first high-low pressure converter 2 and the second high-low pressure converter 5 are used for cooling and discharging slag.

[0031] During normal drilling, low-pressure water flows through the edges of the first high-low pressure converter 2 and the second high-low pressure converter 5 in the component cavity and flows into the drill bit 1 for cooling and discharging slag. When drilling in soft coal seams or cross-seam drilling, the water pressure is increased to 2 MPa. The high-pressure water enters the cavity to push the first high-low pressure converter 2, block the cavity in front of the reaming bit 3, and open the reaming bit 3 for reaming operation. The opening degree of the reaming bit 3 can be controlled by the size of the water pressure. When drilling to the position where hydraulic slotting is required, stop drilling and at the same time continue to increase the water pressure to more than 10 MPa, push the second high-low pressure converter 5 to close the cavity in front of the slotting part 9, and at the same time drive the sliding device 6 inside the slotting part 9 to slide forward, so that the nozzles 4 in the slotting part 9 coincide, and the high-pressure water column exits from the nozzles 4 to complete slotting and permeability enhancement. After slotting, the outer surface sliding cover of the slotting part is closed by reducing the water pressure to block the jet holes, ensuring that low-pressure water enters the drill bit 1 and avoiding the loss of low-pressure water along the jet holes.

[0032] Compared with the related technology, a drilling, reaming and slotting integrated gas drainage hole construction device provided by the present utility model has the following beneficial effects:

[0033] The present utility model provides a drilling, reaming and slotting integrated gas drainage hole construction device, which increases the gas permeability of the coal seam, maximally improves the gas extraction rate and on-site construction efficiency, reduces the cumbersome processes such as multiple drill withdrawals and rod replacements in split construction, greatly reduces the labor intensity of workers, saves costs, improves economic benefits, can complete reaming with different hole diameters by adjusting the water pressure, and the outer surface of the slotting part can achieve the effect of high-pressure slotting and low-pressure sealing through the sliding cover design.

[0034] Second Embodiment

[0035] Please refer to Figure 2 and Figure 3 Based on a drilling, reaming and slotting integrated gas drainage hole construction device provided in the first embodiment of the present application, another drilling, reaming and slotting integrated gas drainage hole construction device is proposed in the second embodiment of the present application. The second embodiment is only a preferred manner of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0036] Specifically, the difference of a drilling, reaming and slotting integrated gas drainage hole construction device provided in the second embodiment of the present application is that in a drilling, reaming and slotting integrated gas drainage hole construction device, a connection component 11 is provided between the slotting part 9 and the reaming bit 3. The connection component 11 includes a mounting sleeve 111, and an installation block 112 is arranged inside the mounting sleeve 111. One end of the installation block 112 is connected to one end of the reaming bit 3.

[0037] The mounting sleeve 111 is installed on the rotating rod through a fixing block 114 and a bolt 115. At both ends of the rotating rod, rectangular blocks are rotatably connected through rotating shafts. One end of the two rectangular blocks is connected to the placement groove 10 on the slotting part 9. The mounting sleeve 111 and the installation block 112 can be fixed by plugging and screwing. A threaded through hole adapted to the bolt 115 is provided between the mounting sleeve 111 and the installation block 112.

[0038] A threaded bolt 113 is provided between the mounting sleeve 111 and the installation block 112.

[0039] Both sides of the mounting sleeve 111 are connected with fixing blocks 114, and bolts 115 are arranged inside the fixing blocks 114.

[0040] The working principle of a drilling, reaming and slotting integrated gas drainage hole construction device provided by the present utility model is as follows:

[0041] During use, when the severely worn reaming bit 3 needs to be disassembled and replaced, first take out the threaded bolt 113 between the mounting sleeve 111 and the installation block 112. After the threaded bolt 113 is taken out, then pull the reaming bit 3 to drive the installation block 112 to separate from the mounting sleeve 111, and then the replacement can be carried out.

[0042] Compared with the related art, a drilling, reaming and slotting integrated gas drainage hole construction device provided by the present utility model has the following beneficial effects:

[0043] The present utility model provides a drilling, reaming and slotting integrated gas drainage hole construction device. A connection component 11 is provided between the slotting part 8 and the reaming bit 3. When the reaming bit 3 is severely worn after long-term work, it is convenient to disassemble and replace the reaming bit 3.

[0044] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, are equally included within the patent protection scope of the present utility model.

Claims

1. A drilling, reaming and cutting integrated construction device for gas drainage holes, characterized in that Comprising: A reaming part, one end of the reaming part is connected with a drill bit, a first high-low pressure converter is arranged inside the reaming part, and reaming bits are arranged on both sides of the surface of the reaming part; A slitting part, the slitting part is arranged at one end of the reaming part, a second high-low pressure converter is arranged inside the slitting part, a sliding device is arranged on the slitting part, and a plurality of nozzles and an outer surface water outlet are respectively arranged on the sliding device.

2. The integrated drilling, reaming and cutting device for gas drainage hole construction according to claim 1, characterized in that, A placement groove adapted to the reaming bit is formed on the surface of the reaming part.

3. The integrated drilling, reaming and cutting device for gas drainage hole construction according to claim 1, characterized in that, The drill bit, the reaming part and the slitting part are connected by screw threads.

4. The integrated drilling, reaming and cutting device for gas drainage holes according to claim 1, characterized in that, The first high-low pressure converter and the second high-low pressure converter are used for cooling and discharging slag.

5. The construction device for a combined drilling, reaming and cutting gas drainage hole according to claim 1, characterized in that, A connecting component is arranged between the slitting part and the reaming bit. The connecting component includes a mounting sleeve, and a mounting block is arranged inside the mounting sleeve. One end of the mounting block is connected with one end of the reaming bit.

6. The integrated drilling, reaming and cutting device for gas drainage holes according to claim 5, wherein, A threaded bolt is arranged between the mounting sleeve and the mounting block.

7. The integrated drilling, reaming and cutting device for gas drainage holes according to claim 5, characterized in that, Fixed blocks are connected to both sides of the mounting sleeve, and bolts are arranged inside the fixed blocks.

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