CN219366003U

CN219366003U - Drilling hole sealing system special for gas extraction between coal beds

Info

Publication number: CN219366003U
Application number: CN202320481657.9U
Authority: CN
Inventors: 朱保顺; 田玉明; 高云峰; 郝惠兰; 吉国荣
Original assignee: Shanxi Institute Of Science And Technology
Current assignee: Shanxi Institute Of Science And Technology
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-07-18
Anticipated expiration: 2033-03-14

Abstract

The utility model provides a special drilling hole sealing system of gas drainage between coal seam, including corresponding setting up in the first shutoff section in drilling both ends and second shutoff section, have the filling area between first shutoff section and the second shutoff section, be used for filling haydite proppant in the filling area, still include feeding member, conveying pipeline, the conveying pipeline is the hose of bending, feeding member has feed inlet and discharge gate, the one end and the discharge gate of conveying pipeline are connected, the other end is the free end, can stretch into the filling area, through setting up the convenient degree that this technical scheme not only can improve the later stage and dismantle the extraction pipe, its specific convenient degree is because haydite proppant can more deviate from the drilling more easily after the tip shutoff section is removed, and the support strength in the drilling can be improved as the filler in the filling area to utilize haydite proppant moreover, stability is high, take place to collapse, the possibility of deformation is little.

Description

Drilling hole sealing system special for gas extraction between coal beds

Technical Field

The utility model relates to an underground coal seam gas extraction technology, in particular to a hole sealing device in the process of gas extraction between coal seams.

Background

The gas is colorless, odorless and nontoxic combustible gas which mainly exists between coal seams, and the gas between the coal seams is usually mined before coal mining. When gas is mined, a hole which can extend into a gas existing area is drilled in a coal seam, then a drainage pipe extends into the drilled hole, and then the drilled hole is plugged to prevent the gas from leaking out through the drilled hole. The current drilling plugging mode mainly adopts a mode of bag matched grouting, the bag matched grouting is troublesome in later-stage disassembly of the extraction pipe, and is matched with the sand slurry, meanwhile, the bag matched grouting mode needs to be specially manufactured, the bag needs to be matched with the extraction pipe for installation, and the manufacturing requirement on the extraction pipe is high. In addition, the plugging of the drilling hole is realized by injecting cement-based hole sealing materials, high-water-speed condensation hole sealing materials, fly ash hole sealing materials and organic hole sealing materials besides the grouting of the bag, and the prior art mainly adopts two modes of injecting the materials, namely, the whole drilling hole is injected with the materials, and the plugging section is only injected at the end part of the drilling hole, which is close to the gas existence area. However, the problem that the later extraction pipe is not easy to detach is also caused by integral drilling, the support strength between the drilling hole and the extraction pipe is insufficient due to the injection of the plugging section, so that the extraction drilling hole is easily caused to generate cracks due to the instability of ground stress deformation, collapse is generated when serious, a new air leakage channel is further formed, and gas extraction fails.

Disclosure of Invention

This application is in order to make up the not enough that the drilling shutoff mode that present gas exploitation exists, and then has designed the special drilling hole sealing system of gas extraction between the coal seam of this application, and its specific scheme is:

the utility model provides a special drilling hole sealing system of gas drainage between coal seam, including corresponding setting up in drilling both ends first shutoff section and second shutoff section, have the filling area between first shutoff section and the second shutoff section, be used for filling haydite proppant in the filling area, still include feeding part, conveying pipeline, the conveying pipeline is the hose that can bend, and feeding part has feed inlet and discharge gate, and the one end and the discharge gate of conveying pipeline are connected, and the other end is the free end, can stretch into the filling area.

Preferably, the conveying pipes are at least two, a distributor is arranged between the feeding part and the conveying pipes, and one ends of the at least two conveying pipes are respectively connected with the distributor.

Preferably, a pipe conveying device is further arranged between the distributor and each conveying pipe, the pipe conveying device comprises a base, a crank slide block mechanism is arranged on the base, an elastic clamping part is arranged on a slide block of the crank slide block mechanism, and the elastic clamping part is used for clamping and loosening the conveying pipes.

Preferably, the elastic clamping part comprises a fixed plate, the fixed plate is arranged on the sliding block, the fixed plate is provided with a movable clamping block and a fixed clamping block, the movable clamping block is arranged on the fixed plate through a spring, and a rigid rope is further connected between the movable clamping block and the crank sliding block mechanism.

Preferably, a rotating roller is further arranged on the base, the rotating roller is provided with a guide ring, and the free end of the conveying pipe penetrates through the guide ring.

Preferably, the base is also provided with a lifting seat, the lifting seat is arranged on the base through a lifting mechanism, and the crank block mechanism is arranged on the lifting seat.

Preferably, the lifting mechanism is a lead screw nut.

Preferably, the feeding member is a screw conveyor.

According to the technical scheme, the convenience degree of later-stage disassembly of the extraction pipe can be improved, and the concrete convenience degree is that the ceramic propping agent can be more easily removed from the drilling hole after the end plugging section is removed, and the ceramic propping agent is used as the filling agent in the filling area to improve the supporting strength in the drilling hole, so that the stability is high, and the possibility of collapse and deformation is low.

Drawings

FIG. 1 is a front view of the present utility model;

fig. 2 is a side view of the resilient clip portion.

In the figure, 1, a screw conveyor, 2, a distributor, 3, a conveying pipe, 4, a rotating roller, 5, a guide ring, 6, a base, 7, a lifting seat, 8, a screw nut, 9, an elastic clamping part, 901, a fixed plate, 902, a spring, 903, a fixed clamping block, 904, a movable clamping block, 10, a crank sliding block mechanism, 1001, a sliding block, 1002, a connecting rod, 1003, a side link, 11, a second blocking section, 12, a filling area, 13, a first blocking section, 14, a ceramsite supporting agent, 15, a pumping pipe, 16 and a rigid rope.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.

In addition, in the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The hole sealing device for gas extraction is carried out in the coal mining process, the whole device enters underground operation through a coal mining roadway, the drilling mode can be transverse or longitudinal, and the drilling is used as an example for description.

As shown in fig. 1-2, the drilling hole sealing system specially used for gas extraction between coal seams comprises a first plugging section 13 and a second plugging section 11 which are correspondingly arranged at two ends of a drilling hole, wherein the plugging sections preferably adopt high-water-speed condensation hole sealing materials, and of course, cement-based hole sealing materials, fly ash hole sealing materials, organic hole sealing materials and the like can be correspondingly adopted under the conditions of different requirements on fluidity, strength and expansibility and different stratum. The first plugging section 13 and the second plugging section 11 are arranged so as to have a filling area 12 therebetween, and the filling area 12 is filled with the ceramic proppant 14, so that the ceramic proppant has high strength and good fluidity, and under the working conditions of the application, the fluidity and the strength can be balanced to meet the use requirements, and the ceramic proppant 14 can easily separate the extraction pipe 15 from the proppant when the extraction pipe 15 is disassembled in the later stage. During plugging, a first plugging section 13 is formed at one end of a drill hole close to a gas existing area by using a high-water-rate-setting material, then a ceramsite propping agent 14 is fed into the drill hole, finally one end of the drill hole far away from the gas existing area is formed into a second plugging section 11 by using the high-water-rate-setting material, the two ends of the drill hole are integrally formed into plugging sections, and the middle of the drill hole is a ceramsite supporting section, so that the supporting strength in the drill hole is integrally enhanced, and the possibility of collapse and cracks of the drill hole is reduced.

In addition, the hydraulic haydite feeding device further comprises a feeding part and a feeding pipe 3, wherein the feeding pipe 3 is a bendable hose, the hose is a hose with a certain hardness, the hose can be bent under the condition of keeping a certain hardness, the feeding part is provided with a feeding hole and a discharging hole, one end of the feeding pipe 3 is connected with the discharging hole, the other end of the feeding pipe is a free end and can extend into a filling area, haydite propping agent 14 enters the feeding part from the feeding hole, under the condition of pressurized feeding of the feeding part, the haydite propping agent 14 is discharged from the discharging hole and is conveyed into a drill hole through the feeding pipe 3, and the feeding pipe 3 is conveyed in a backward mode when the haydite is conveyed until the haydite propping agent 14 fills the filling area 12, and then the drill hole is plugged by using high-water setting material.

Further, in order to realize that a plurality of regions draw gas simultaneously, set up two at least with above-mentioned conveying pipeline 3, in this embodiment, take out the pipe 15 and set up three, can take out three gas positions simultaneously like this, in order to reduce the occupation space of conveying parts in the tunnel, let three take out pipe 15 share a feeding part, be equipped with tripper 2 between feeding part and conveying pipeline 3, the one end of three conveying pipeline 3 is connected with tripper 2 respectively, the feeding part just can carry haydite proppant 14 in three drilling that corresponds through three conveying pipeline 3 simultaneously like this.

The powder lot device adopts the existing four-way distributor with a valve, and the structure of the powder lot device is the prior art, so the structure of the powder lot device is not described in detail in the application.

Further, in order to reduce manual operation and reduce labor, and realize automation of lowering the conveying pipe 3 into the borehole, a pipe feeding device is further arranged between the distributor 2 and each conveying pipe 3, the pipe feeding device comprises a base 6, a crank-slide mechanism 10 is arranged on the base 6, the crank-slide mechanism 10 comprises a side link 1003, a connecting rod 1002 and a slide 1001, one end of the side link 1003 is hinged on the base 6, meanwhile, one end of the connecting rod is hinged on the base 6 and is connected with a motor or a hydraulic motor, the motor drives the crank-slide mechanism 10 to realize horizontal reciprocating motion of the slide 1001 on the base 6, the slide 1001 is provided with an elastic clamping part 9, the elastic clamping part 9 realizes clamping and opening along with sliding reciprocation of the slide 1001, namely, when the conveying pipe 3 is lowered into the borehole for the first time, the elastic clamping part 9 is in a clamping state when in a starting stroke, and in a releasing state when the conveying pipe 3 is in a retreating stroke, the elastic clamping part 9 is in a releasing state when in a releasing state.

Further, for the structure of the elastic clamping portion 9, the structure specifically includes a fixing plate 901, the fixing plate 901 is a U-shaped plate, a transverse plate section of the fixing plate 901 is vertically fixed on the sliding block 1001, a vertical plate section on the upper side of the fixing plate 901 is provided with a movable clamping block 904, a vertical plate section on the lower side of the fixing plate 901 is provided with a fixed clamping block 903, the movable clamping block 904 is arranged on the fixing plate 901 through a spring 902, meanwhile, a rigid rope 16 is further connected between the movable clamping block 904 and the crank sliding block mechanism 10, and a specific connecting rope is connected on a connecting rod 1002 of the movable clamping block 904 and the crank sliding block mechanism 10.

When the conveying pipe 3 is initially lowered into the drilling hole, a motor of the crank-slider mechanism 10 is driven to rotate anticlockwise, a connecting rod 1002 in the crank-slider mechanism 10 translates from left to right, no tension exists between the connecting rod 1002 and the rigid rope 16 when translating from left to right, tension exists between the connecting rod 1002 and the rigid rope 16 when the connecting rod 1002 changes to right to left (a circle of rotation of a side link 1003 drives the connecting rod 1002 to translate for a circle of circulation, the circulation comprises no tension exists between the connecting rod 1002 and the rigid rope 16 from left to right and the tension exists between the right and the rigid rope 16), the conveying pipe 3 is clamped by a corresponding movable clamping block 904 exactly, the conveying pipe 3 is loosened by a corresponding movable clamping block 904 when the connecting rod 1002 and the rigid rope 16 have tension, and the conveying pipe 3 is lowered into the drilling hole by realizing one circulation of clamping and loosening of the movable clamping block 904 when the side link 1003 rotates for a circle.

When the feeding pipe 3 is placed at a required position and is required to be fed in a backward mode, the motor drives the crank block mechanism 10 to rotate clockwise, so that after the side link 1003 translates for one cycle, the movable clamping block 904 can be loosened and clamped for one cycle, and the clamping and loosening corresponding feeding directions are opposite to the above, so that the feeding pipe 3 is gradually pulled out of the drilling hole in a backward mode.

Further, in order to make the pulled conveying pipes 3 stacked in disorder and occupy the coal mine tunnel, a rotating roller 4 is further arranged on the base 6, the rotating roller 4 is provided with a guide ring 5, the free end of the conveying pipe 3 passes through the guide ring 5, when in use, the rotating roller 4 is positioned between the distributor 2 and the conveying pipe device, in the process of conveying the conveying pipes 3 in a backward type, the conveying pipe 3 sent out by the conveying pipe device can be pulled in the tunnel by manpower, at the moment, bending of the conveying pipe 3 can be reduced as much as possible, at the moment, the conveying pipe 3 is still conveying while the conveying pipe 3 is pulled outwards, and after the conveying pipe 3 is completely withdrawn from the drill hole, the conveying pipe 3 is wound on the rotating roller 4.

Further, in order to make this send pipe device adapt to different drilling heights, be convenient for carry conveying pipeline 3 to the drilling in, still be equipped with elevating socket 7 on base 6, this elevating socket 7 passes through elevating system and sets up in base 6, slider-crank mechanism 10 sets up in elevating socket 7.

In one embodiment, the lifting mechanism is a screw nut 8, and the screw nut 8 is adopted because the screw nut 8 has high precision, when the conveying pipe 3 is lowered into the borehole, the conveying pipe 3 cannot be lowered therein even if the height of the conveying pipe 3 is small from the borehole, so that the adjustment of the screw nut 8 can realize adjustment within a small range.

In one embodiment, the feeding component is a screw conveyor 1, and the screw conveyor 1 can realize pressurized conveying, so that not only the ceramsite propping agent 14 can be continuously conveyed into the drill hole through the conveying pipe 3, but also the compactness of the ceramsite propping agent 14 in the drill hole can be realized by adjusting the retreating speed of the conveying pipe 3 after conveying.

The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.

The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

Claims

1. The special drilling hole sealing system for gas drainage between coal seams is characterized by comprising a first plugging section and a second plugging section which are correspondingly arranged at two ends of a drilling hole, a filling area is arranged between the first plugging section and the second plugging section, a ceramic proppant is filled in the filling area, a feeding part and a conveying pipe are further included, the conveying pipe is a flexible pipe which can be bent, the feeding part is provided with a feeding hole and a discharging hole, one end of the conveying pipe is connected with the discharging hole, and the other end of the conveying pipe is a free end and can extend into the filling area.

2. The system for drilling and sealing holes for gas extraction between coal seams according to claim 1, wherein at least two conveying pipes are arranged, a distributor is arranged between the feeding part and the conveying pipes, and one ends of at least two conveying pipes are respectively connected with the distributor.

3. The system for drilling and sealing holes for gas extraction between coal seams according to claim 2, wherein a pipe feeding device is further arranged between the distributor and each of the conveying pipes, the pipe feeding device comprises a base, a crank-slider mechanism is arranged on the base, and an elastic clamping part is arranged on a slider of the crank-slider mechanism and used for clamping and loosening the conveying pipes.

4. The system for drilling and sealing holes for gas drainage between coal seams according to claim 3, wherein the elastic clamping portion comprises a fixed plate, the fixed plate is arranged on the sliding block, a movable clamping block and a fixed clamping block are arranged on the fixed plate, the movable clamping block is arranged on the fixed plate through a spring, and a rigid rope is further connected between the movable clamping block and the crank sliding block mechanism.

5. The system for sealing holes in a drilled hole for gas drainage between coal beds according to claim 3, wherein a rotating roller is further arranged on the base, the rotating roller is provided with a guide ring, and the free end of the conveying pipe passes through the guide ring.

6. The system for drilling and sealing holes for gas extraction between coal beds according to claim 3, wherein the base is further provided with a lifting seat, the lifting seat is arranged on the base through a lifting mechanism, and the crank block mechanism is arranged on the lifting seat.

7. The system for drilling and sealing holes for gas extraction between coal seams according to claim 6, wherein the lifting mechanism is a screw nut.

8. The system for drilling and sealing holes for gas drainage between coal seams according to any one of claims 1-7, wherein the feeding component is a screw conveyor.