Blowout prevention device and drilling device

Abstract

The invention relates to the technical field of coal seam gas hole ejection preventing device, in particular to a hole ejection preventing device and a drilling device. The hole ejection preventing device comprises a hole ejection preventing box, a pumping and discharging mechanism and a first pumping and discharging tube, wherein a drill rod hole and a collecting hole are formed in the hole-spraying preventing box oppositely; one end of the first pumping and discharging tube is communicated with the hole-spraying preventing box, and the other end of the first pumping and discharging tube is communicated with the pumping and discharging mechanism; the collecting hole is used for being communicated with a drill hole, and the drill rod hole is used for penetrating of a drill rod; the pumping and discharging mechanism is used for pumping and discharging gas in the hole-spraying preventing box to a preset position. According to the hole-spraying preventing device, the hole-spraying preventing box and the pumping and discharging mechanism are used for pumping and discharging gas in the drill hole, and accordingly excessive gas in a drilling well and hazards to user health caused by the fact that gas sprays out of the drill hole are avoided.

Description

technical field [0001] The invention relates to the technical field of coal seam gas blowout holes, in particular to a blowout hole device and a drilling device. Background technique [0002] Coal seams refer to layered solid combustible minerals transformed from plant remains through complex biochemical and geological processes. It occurs in coal-bearing rock series, located between the roof and floor rocks. The number of layers, thickness, occurrence and burial depth of coal seams are restricted by paleostructure, paleogeography and paleoclimate conditions. The occurrence of coal seams is an important basis for determining the economic value of coal fields and development planning. With the continuous development of my country's economy, the demand for coal industry has gradually increased, and the coal mining industry has developed rapidly. [0003] During coal mining, drilling is used to drill holes. However, in some cases, during the drilling construction process or...

AI Technical Summary

Problems solved by technology

However, in some cases, during the drilling construction process or after the drilling construction is completed, there will be a phenomenon that a large amount of coal powder and gas are continuously ejected from the drilling hole in a relatively short period of time, that is, the drilling spraying hole

A large amount of gas gushes out from the borehole in a short period of time and the gas in the roadway exceeds the standard, which may lead to serious consequences that seriously damage the personal safety of the construction personnel.

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