CN209959210U

CN209959210U - Coal rock stratum fracturing water injection hole packer

Info

Publication number: CN209959210U
Application number: CN201920817091.6U
Authority: CN
Inventors: 赵志林; 高丽琴; 卜东杰; 宋英军; 赵岗
Original assignee: Henan Zhi Lin Mining Equipment Technology Co Ltd
Current assignee: Henan Zhi Lin Mining Equipment Technology Co Ltd
Priority date: 2019-06-02
Filing date: 2019-06-02
Publication date: 2020-01-17
Anticipated expiration: 2029-06-02

Abstract

The utility model provides a coal stratum fracturing water injection hole packer which characterized in that: comprises three sealing sections which are fixed in series; each sealing section comprises a water injection pipe, an expansion rubber pipe wraps the outside of the water injection pipe, the space inside the water injection pipe, the space between the outer wall of the water injection pipe and the expansion rubber pipe are two closed spaces which are not communicated with each other, and two ends of the water injection pipe extend out of the expansion rubber pipe; both ends of the space between the outer wall of the water injection pipe and the expansion rubber pipe are provided with water through ports; the water injection pipes of the two sealing sections are fixed at the joint of the two sealing sections through a connecting thread sleeve; the space between the outer walls of the water injection pipes of the two sealing sections and the expansion rubber pipe is communicated at the joint of the two sealing sections through a connecting pipe. Compared with the prior art, the technical effect of the utility model is that, the utility model discloses establish the shutoff portion into tertiary shutoff, can reach better sealed effect. Meanwhile, the device can be used repeatedly, and the cost is saved.

Description

Coal rock stratum fracturing water injection hole packer

Technical Field

The utility model relates to an apparatus equipment for coal mine.

Background

Before coal mining, in order to release partial gas and effectively reduce the gas content of a coal body, improve the working environment of workers and avoid dust explosion accidents, a coal stratum fracturing water injection hole packer is installed in an advanced discharge drill hole before coal mining, and high-pressure water injection is carried out to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: in practice, the sealing between the outer plug part of the hole packer and the hole wall is not good, water leaks out, and the water pressure in the hole is too low to achieve the fracturing effect.

The technical scheme of the utility model specifically does:

the utility model provides a coal stratum fracturing water injection hole packer which characterized in that: comprises three sealing sections which are fixed in series;

each sealing section comprises a water injection pipe, an expansion rubber pipe wraps the outside of the water injection pipe, the space inside the water injection pipe, the space between the outer wall of the water injection pipe and the expansion rubber pipe are two closed spaces which are not communicated with each other, and two ends of the water injection pipe extend out of the expansion rubber pipe; both ends of the space between the outer wall of the water injection pipe and the expansion rubber pipe are provided with water through ports; the water injection pipes of the two sealing sections are fixed at the joint of the two sealing sections through a connecting thread sleeve; the space between the outer walls of the water injection pipes of the two sealing sections and the expansion rubber pipe is communicated at the joint of the two sealing sections through a connecting pipe; the water inlet is fixed at the end part of the water injection pipe at the water inlet end of the equipment, and the water outlet is fixed at the end part of the water injection pipe at the water outlet end of the equipment.

The water injection pipe between the two expansion rubber pipes is provided with a plurality of through holes communicated with the outside.

Compared with the prior art, the technical effect of the utility model is that, the utility model discloses establish the shutoff portion into tertiary shutoff, can reach better sealed effect. Meanwhile, the device can be used repeatedly, and the cost is saved.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is an enlarged schematic view of the first seal segment.

Detailed Description

Referring to fig. 1-2, a coal stratum fracturing water injection hole packer comprises three sealing sections 10 which are fixed in series.

Each sealing section 10 comprises a water injection pipe 14, an expansion rubber pipe 21 is wrapped outside the water injection pipe 14, the space inside the water injection pipe 14, the outer wall of the water injection pipe 14 and the space between the expansion rubber pipes 21 are two closed spaces which are not communicated with each other, and two ends of the water injection pipe 14 extend out of the expansion rubber pipe 21.

Both ends of the space between the outer wall of the water injection pipe 14 and the expansion rubber pipe 21 are provided with water passing ports 23 (also referred to as water injection ports).

The water injection pipes 14 of the two seal segments 10 are fixed at the junction of the two seal segments by a connecting wire sleeve 13.

The space between the outer wall of the water injection pipe 14 of the two seal sections 10 and the expansion rubber pipe 21 is communicated at the joint of the two seal sections through a connecting pipe 22.

The water inlet 11 is fixed at the end part of the water injection pipe at the water inlet end of the device, and the water outlet 12 is fixed at the end part of the water injection pipe at the water outlet end of the device.

In order to fracture the wall of the hole between the two expansion rubber hoses 21, the water injection pipe 14 between the two expansion rubber hoses 21 is provided with a plurality of through holes 16 (only four are drawn in the figure) communicated with the outside.

The working principle is as follows:

when water is injected, the water through port 23 at the outermost side is connected with an upstream water source (generally a water pump), the space (three groups of which are connected together) between the outer wall of the water injection pipe 14 and the expansion rubber pipe 21 is a closed space, and the expansion rubber pipe is continuously expanded under the pressure of water until the outer side surface of the expansion rubber pipe is in contact with the hole wall of the advanced discharge drill hole, so that each expansion rubber pipe is equivalent to an industrially used sealing ring and is sealed at the hole opening of the advanced discharge drill hole. This patent is equipped with the three-layer and seals, and is sealed safer.

At this time, the water inlet 11 injects water into the water injection pipe 14, flows into the advanced discharge drill hole from the water outlet 12, and simultaneously enters the hole from the through hole 16, and the pressure in the water injection pipe 14 is kept above a certain pressure for more than ten hours or even longer according to the environmental parameters of the mine until fracturing is completed.

After fracturing is completed, water is discharged from the water through hole 23 on the outermost side, the expansion rubber tube is contracted and recovered, and the expansion rubber tube is integrally taken out and can be repeatedly used, so that the cost is saved.

Other content participates in the prior art.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. The utility model provides a coal stratum fracturing water injection hole packer which characterized in that: comprising three sealing sections (10) fixed in series;

each sealing section (10) comprises a water injection pipe (14), an expansion rubber pipe (21) is wrapped outside the water injection pipe (14), the space inside the water injection pipe (14), the outer wall of the water injection pipe (14) and the space between the expansion rubber pipes (21) are two closed spaces which are not communicated with each other, and two ends of the water injection pipe (14) extend out of the expansion rubber pipes (21);

both ends of the space between the outer wall of the water injection pipe (14) and the expansion rubber pipe (21) are provided with water through holes (23);

the water injection pipes (14) of the two sealing sections (10) are fixed at the joint of the two sealing sections through a connecting thread sleeve (13);

the space between the outer wall of the water injection pipe (14) of the two sealing sections (10) and the expansion rubber pipe (21) is communicated at the joint of the two sealing sections through a connecting pipe (22);

the water inlet end of the water injection pipe at the water inlet end of the device is fixed with a water inlet (11), and the water outlet end of the water injection pipe at the water outlet end of the device is fixed with a water outlet (12).

2. The coal strata fracture water injection hole packer as claimed in claim 1, wherein: a plurality of through holes (16) communicated with the outside are arranged on the water injection pipe (14) between the two expansion rubber pipes (21).