CN210087279U

CN210087279U - Integral type gas drainage drilling hole packer

Info

Publication number: CN210087279U
Application number: CN201920883918.3U
Authority: CN
Inventors: 王小军; 刘强; 耿耀强; 徐文全; 李贤良; 赵鹤翔
Original assignee: Shaanxi Coal and Chemical Technology Institute Co Ltd
Current assignee: Shaanxi Coal and Chemical Technology Institute Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-02-18
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses an integral type gas drainage drilling hole packer, including slip casting pipe, take out and adopt the pipe, return thick liquid pipe, first bag and second bag are all established outside taking out and are taken out the pipe, and with taking out and adopt pipe fixed connection, slip casting pipe and return thick liquid pipe all with first bag fixed connection, the bag can not take place to slide when pushing in drilling, are equipped with the thread gluing on the bag, pull open the thread gluing during the hole sealing, pour polyurethane into the bag in, closed thread gluing, polyurethane can not spill, at first be full of the bag after the polyurethane reaction and take out the annular airtight space that the outside of tubes formed, prop up the bag completely after, have partial polyurethane to extrude from the pore of bag under the pressure effect, the polyurethane of extruding bonds with the pore wall, fully seals drilling both ends.

Description

Integral type gas drainage drilling hole packer

Technical Field

The utility model belongs to the technical field of gas drainage hole sealing, concretely relates to integral type gas drainage drilling hole packer.

Background

For a soft coal seam with large mine pressure or high gas content, the standing time is too long after the drilling construction is finished, and the drilling is easy to collapse, so that the hole packer cannot be conveyed to a position, the hole sealing length cannot reach the specified standard, and the extraction effect is influenced; in addition, the gas of the coal seam rushes to a roadway to cause gas accumulation, and a gas overrun accident occurs, so that the gas extraction drilling and sealing are carried out, and the plugging is carried out in time after the drilling construction is finished.

The existing underground plugging drilling has two modes, one mode is to utilize a bag type hole packer, and the whole hole sealing is completed by adopting a pressurized grouting mode; and the other method is to bind surface yarns or woven bags on the extraction pipe, pour polyurethane into the extraction pipe to seal and plug two ends of the drilled hole, and then inject polyurethane or expanded cement slurry into the extraction pipe to seal the hole. The two hole sealing modes have certain use limitations or defects, when the hole sealing mode is used for sealing a drill hole with poor hole forming or easy hole collapse, the hole sealing device needs to perform grouting immediately after being conveyed into the drill hole, only one drill hole can be sealed at a time, and the drilling and hole sealing work efficiency is influenced; in the second hole sealing mode, the operations of sealing the two ends are troublesome, the binding is not tight, the sliding is easy, the sealing effect is not good, and the hole sealing under pressure is difficult to realize.

In conclusion, how to solve the problem of sealing the extraction holes of the soft coal seam with large ore pressure or high gas content is a problem which needs to be solved urgently in the field at present.

Disclosure of Invention

The utility model provides an integral type gas is taken out and is adopted drilling hole packer takes out and adopts the hole to carry out effective shutoff to big or the high soft coal seam of gas content of ore deposit pressure.

In order to achieve the purpose, the utility model relates to an integral type gas drainage drilling hole packer includes the slip casting pipe, takes out the drainage pipe, returns thick liquid pipe, first bag and second bag, and first bag and second bag are all established outside taking out the drainage pipe, and with take out drainage pipe fixed connection, slip casting pipe and return thick liquid pipe all with first bag fixed connection.

Furthermore, the grouting pipe and the slurry return pipe both penetrate through the first bag, and the grouting pipe and the slurry return pipe are fixedly connected with the first bag through a hoop.

Furthermore, the bag is provided with an opening, and the opening is provided with a sealing piece.

Further, the sealing piece is a zipper or a thread gluing.

Furthermore, the extraction pipe is provided with air holes.

Furthermore, the second bag is fixed on the extraction pipe through three snap rings, the second bag is divided into two independent cavities by the three snap rings, one of the cavities is used for containing hole sealing materials, and the extraction pipe in the other cavity is provided with air holes.

Furthermore, a pulp return hole is formed in one end, close to the second bag, of the pulp return pipe.

Compared with the prior art, the utility model discloses following profitable technological effect has at least, fixes the bag on taking out the drainage pipe through the snap ring, pushes away drilling in-process snap ring and bag and can not take place to slide, and polyurethane reaction back is earlier to dispersing all around and filling up the bag, reaches certain pressure after, has partial polyurethane to extrude from the through-hole on the bag, along the pore wall of bonding drilling all around, fully blocks up drilling hole sealing section both ends.

Because in the hole sealing process, can be to first bag external diffusion after the polyurethane reaction, if with slip casting pipe and return the thick liquid pipe setting outside first bag, then when the polyurethane is outward diffusion, slip casting pipe and return the thick liquid pipe and can cause the interference to the polyurethane diffusion route after the reaction, so all pass first bag with slip casting pipe and return the thick liquid pipe, avoid interfering.

Further, because the existence of sealing member, in the use, pass through the sealing member with the bag after adorning polyurethane and seal, consequently push drilling in-process, needn't keep certain face up deliberately, can rotate according to the convenient degree of push drilling at will, avoided polyurethane to spill midway on the one hand, on the other hand has simplified the operation flow.

Furthermore, in order to avoid the blockage of the slurry return pipe by coal cinder, which causes the phenomenon that slurry cannot be injected due to overhigh air pressure of the middle grouting section in the grouting process, the air holes are formed in the extraction pipe of the middle grouting section, so that the slurry can be normally injected under the condition that the slurry return pipe is blocked.

Furthermore, the second bag is fixed on the extraction pipe through three snap rings, the second bag is divided into two independent cavities by the three snap rings, one of the cavities is used for containing hole sealing materials, and the extraction pipe in the other cavity is provided with air holes. The second bag covering the air holes can prevent the grout from flowing out. Furthermore, a slurry return hole is formed in the slurry return pipe, if the opening of the slurry return pipe is blocked by coal cinder, during grouting, slurry after the drill hole is filled can also return out through the slurry return hole in the slurry return pipe, so that a constructor can know that the drill hole is filled, and therefore pressurized grouting is achieved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a side view of the left side of the utility model when the left side of the bag is expanded.

In the drawings: 1-slurry return pipe, 2-snap ring, 31-first bag, 32-first bag, 4-sealing piece, 5-clamp, 6-slurry return hole, 7-extraction pipe, 8-grouting pipe and 9-air vent.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 and 2, the integrated gas extraction borehole packer comprises a grouting pipe 8, a slurry return pipe 1 and a bag, wherein the bag comprises a first bag 31 and a second bag 32. The first bag 31 is provided with two first openings, two second openings and two third openings, the extraction pipe 7 passes through the first bag 31 through the two first openings, the slurry return pipe 1 passes through the first bag 31 through the two second openings, and the grouting pipe 8 passes through the first bag 31 through the two third openings; two first openings are formed in the second bag 32, the extraction pipe 7 penetrates through the second bag 32 through the two first openings, the first bag 31 and the second bag 32 are fixedly sleeved on the extraction pipe 7 through the clamping ring 2, the grouting pipe 8 and the slurry return pipe 1 are symmetrically fixed on the first bag 31 through the clamping ring 5, a plurality of through holes are formed in the first bag 31, the first bag 31 and the second bag 32 surround the extraction pipe 7, the clamping ring 2 fixes the first bag 31 and the second bag 32 on the extraction pipe 7, the first bag 31 and the second bag 32 cannot slide when being pushed into a drill hole, the sealing piece 4 is arranged on the bag, and the 4-position thread gluing or the zipper of the sealing piece is arranged on the sealing piece.

The air holes 9 are formed in the extraction pipe 7 between the first bag 31 and the second bag 32, and when the slurry return pipe is blocked by coal cinder, air pressure generated in a grouting section in the grouting process can be released through the air holes so as to ensure that the grouting section can be filled with slurry. The inner side end of the slurry return pipe 1 is provided with a slurry return hole 6, so that slurry can be returned in time after the hole sealing slurry is fully filled under the condition that the pipe orifice of the slurry return pipe 1 is blocked by coal slag.

Preferably, the second bag 32 is fixed on the extraction pipe 7 through three snap rings 2, the three snap rings 2 divide the second bag 32 into two independent cavities, one of the cavities is used for containing hole sealing materials, and the extraction pipe 7 in the other cavity is provided with air holes 9.

The use method of the hole packer comprises the following steps:

the thread gluing is opened, polyurethane is poured into the bag, the thread gluing is closed, the polyurethane cannot be spilled, the hole packer is pushed into the drill hole, after the polyurethane in the bag reacts, an annular closed space formed by the bag and the outer wall of the extraction pipe 7 is filled, after the bag is completely supported, part of the polyurethane can be extruded out from the through hole in the bag under the action of pressure, the extruded polyurethane is bonded with the hole wall of the drill hole, and two ends of a hole sealing section of the drill hole are fully sealed and blocked. The bag at the two ends of the hole packer is tightly plugged, and a closed cavity is formed between the middle of the hole packer and the inner wall of the drill hole. And then injecting hole sealing materials into the closed cavity through the grouting pipe, when the hole sealing materials are fully injected, the hole sealing materials flow out through the slurry return pipe 1, when the hole sealing materials flow out from the slurry return pipe 1, stopping grouting, folding the slurry return pipe 1, continuing grouting until the specified grouting pressure is reached, and stopping grouting, so that hole sealing is finished. The utility model discloses visual coal seam crack development degree and drilling pore-forming condition adjustment bag length reduce the polyurethane volume of using, practice thrift the hole sealing cost.

Claims

1. The integrated gas extraction drill hole packer is characterized by comprising a grouting pipe (8), an extraction pipe (7), a slurry return pipe (1), a first bag (31) and a second bag (32), wherein the first bag (31) and the second bag (32) are sleeved on the extraction pipe (7) and fixedly connected with the extraction pipe (7), and the grouting pipe (8) and the slurry return pipe (1) are fixedly connected with the first bag (31).

2. The integrated gas extraction drill hole packer according to claim 1, wherein the grouting pipe (8) and the slurry return pipe (1) both pass through the first bag (31), and the grouting pipe (8) and the slurry return pipe (1) are fixedly connected with the first bag (31) through a hoop (5).

3. The integrated gas extraction drill hole packer according to claim 1, wherein an opening is formed in the bag (3), and a sealing piece (4) is arranged at the opening.

4. An integrated gas extraction borehole packer according to claim 3, wherein the sealing piece (4) is a zipper or a hook and loop fastener.

5. The integrated gas extraction borehole packer according to claim 1, wherein ventilation holes (9) are formed in the extraction pipe (7).

6. The integrated gas extraction drilling hole packer according to claim 1 or 5, wherein the second bag (32) is fixed on the extraction pipe (7) through three snap rings (2), the second bag (32) is divided into two independent cavities by the three snap rings (2), one of the cavities is used for containing hole sealing materials, and the extraction pipe (7) in the other cavity is provided with air holes (9).

7. The integrated gas extraction drilling hole packer according to claim 1, wherein a slurry return hole (6) is formed in one end, close to the second bag (32), of the slurry return pipe (1).