CN205297635U - Drainage device drills down - Google Patents

Abstract

The utility model discloses a drainage device drills down, adopt tub (2) and air supply pipe (3) including arranging taking out in drilling (1) in, take out adopt tub (2) continuous with drainage system and drainage system, air supply pipe (3) are continuous with gas supply system, adopt tub (2) to drainage system and valve (4 -1) is constituteed by taking out, gas supply system comprises air supply pipe (3) and valve (4 -2), drainage system adopts tub (2) by taking out, pump drainage storehouse (5) and pump drainage ball (6) are constituteed. The utility model provides a current down gas drainage drilling ponding can't get rid of, influence the gas drainage scheduling problem.

Description

A descending borehole drainage device

technical field

The utility model relates to a downward drilling drainage device, in particular to a downward drilling drainage device adopting negative pressure extraction.

Background technique

In the process of coal mining, it is necessary to arrange boreholes for gas drainage for outburst coal seams. Due to the complexity of coal mine geology, some boreholes are used for gas drainage in the downward direction. Due to the wet drilling process and the existence of some fissure water in the coal seam, there is water in the borehole, and the negative pressure drainage system cannot discharge the water in the borehole, which will cause the gas to fail to be extracted normally , seriously reducing the gas drainage efficiency of the mine.

Contents of the invention

The technical problem to be solved by the utility model is to provide a downhole drilling drainage device to solve the problem that the existing downhole gas drainage borehole water accumulation cannot be removed and the gas drainage is affected.

The technical scheme of the utility model is: a downward drilling drainage device, including a drainage pipe and an air supply pipe placed in the borehole, the extraction pipe is connected with the drainage system and the drainage system, and the air supply pipe is connected with the air supply system.

The extraction pipe extends to the bottom of the borehole.

The drainage system includes a trumpet-shaped pumping bin and a volleyball placed therein.

One side of the exhaust bin is connected with the metal mesh.

The connection between the extraction bin and the extraction pipe is in the shape of a straight pipe.

The diameter of the straight tubular joint between the extraction chamber and the extraction pipe is smaller than the diameter of the extraction volleyball.

Corresponding valves are arranged on the pipelines of the drainage pipe and the gas supply pipe, so as to realize the adjustment of drainage and gas drainage.

When the utility model is in use, the valve on the extraction pipe is opened, the valve on the gas supply pipe is closed, and under the negative pressure of the extraction, the volleyball is blocked to block the exhaust chamber, so that normal gas extraction can be realized; the valve on the gas supply pipe is opened, Close the valve on the extraction pipe, and under the action of positive pressure, the drainage in the borehole can be realized.

The utility model solves the problems that the existing downhole gas drainage boreholes cannot be drained, which affects the normal gas drainage and the like.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

As shown in Figure 1, a downhole drilling drainage device includes a drainage system, an air supply system, and a drainage system.

The drainage system is composed of a drainage pipe 2 and a valve 4-1, and the drainage pipe 2 is connected with a drainage negative pressure pipeline.

The extraction pipe 2 extends to the bottom of the borehole 1 .

The gas supply system is composed of a gas supply pipe 3 and a valve 4-2, and the gas supply pipe 3 is connected to a high-pressure gas pipeline.

The drainage system is made up of extraction pipe 2, extraction chamber 5, and extraction volleyball 6.

The joint between the extraction chamber 5 and the extraction pipe 2 is in the shape of a straight tube, and the outside is in the shape of a trumpet.

The outside of the pumping bin 5 is equipped with a metal mesh 7, and the volleyball 6 is enclosed in the pumping bin 5.

The diameter of the pumping volleyball 6 is greater than the diameter of the straight tubular and trumpet-shaped junction of the pumping chamber 5, that is, the diameter of the junction with the extraction pipe 2.

Open the valve 4-1 on the extraction pipe 2, close the valve 4-2 on the gas supply pipe 3, and under the action of negative pressure, the pumping ball 6 blocks the extraction chamber 5, which can realize normal gas extraction; open the gas supply pipe 3 Valve 4-2 on the top, close valve 5 on the extraction pipe 2, supply high-pressure gas, the pumping volleyball 6 falls, can realize that the water at the bottom of the borehole 1 is discharged through the extraction pipe 2.

Claims (6)

1. A descending borehole drainage device, characterized in that it includes a drainage pipe (2) and an air supply pipe (3) placed in the borehole (1), the drainage pipe (2) and the drainage system and the drainage system connected, and the gas supply pipe (3) is connected to the gas supply system. 2. A downhole borehole drainage device according to claim 1, characterized in that the extraction pipe (2) extends to the bottom of the borehole (1). 3 . The drainage device for downhole drilling according to claim 1 , characterized in that: the drainage system includes a trumpet-shaped pumping bin ( 5 ) and a pumping ball ( 6 ) placed therein. 4 . 4. A downward drilling drainage device according to claim 3, characterized in that one side of the pumping chamber (5) is connected to the metal mesh (7). 5. A downhole drilling drainage device according to claim 3, characterized in that: the connection between the extraction bin (5) and the extraction pipe (2) is in the shape of a straight tube. 6. A downhole drilling drainage device according to claim 5, characterized in that: the diameter of the straight tubular connection between the extraction bin (5) and the extraction pipe (2) is smaller than the diameter of the extraction volleyball (6).