A multifunctional drill rod

Abstract

The invention discloses a multifunctional drilling rod, and relates to the technical field of drilling equipment. The multifunctional drilling rod comprises a drilling rod body, a low-pressure water cavity, a high-pressure water cavity and a one-way flap-type rubber plug. The outer wall of the drilling rod body is provided with at least one low-pressure water spout, the front end of the drilling rod body is provided with at least one water outlet, and the tail end of the drilling rod body is provided with at least one water inlet. The low-pressure water cavity is arranged in the drilling rod body, and is communicated with the low-pressure water spout, the water outlet and the water inlet. The high-pressure water cavity is arranged in the low-pressure water cavity, and the front end of the high-pressure water cavity is provided with a high-pressure water spout. The one-way flap-type rubber plug is arranged on the tail end of the high-pressure water cavity. According to the invention, the drilling rod body is provided with the low-pressure water cavity and the high-pressure water cavity, normal boring and high-pressure cutting can be switched, at the same time, the multifunctional drilling rod can clean bores, and can be connected with another multifunctional drilling rod for use in sets, the case that the drilling rod or a cleaning device needs to be placed downwards for many times to clean the bores is avoided, the cleaning efficiency is high, and the hole blockage phenomenon can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a multifunctional drilling rod. Background technique [0002] The construction of gas extraction tunnels usually includes multiple procedures such as drilling and splitting coal seams. The specific method is to use a tunnel drilling rig to drill a certain depth of borehole first, then replace the drill pipe with a special drill pipe for splitting the coal seam, and then extend into the coal seam position to be split in the borehole, and then use high-pressure water to split the coal seam. In order to achieve a good gas pre-drainage effect, the borehole is usually required to have a certain depth, and the coal seam needs to be split at different depths of the borehole, which requires repeated withdrawal of the drill pipe from the borehole and repeated replacement of the drill pipe and Special drill pipes for splitting coal seams. This drill pipe replacement process wi...

AI Technical Summary

Problems solved by technology

The drill pipe replacement process will take up a lot of engineering time and affect the progress of the project

[0003] At the same time, when there is a lot of pulverized coal and a large amount of gas gushing out during drilling pipe construction, the combined action of gas and pulverized coal is likely to cause hole plugging, which is generally relieved by spraying water or high-pressure gas from the drill pipe or using special drilling cleaning equipment , but it is often necessary to run the drill pipe multiple times or into multiple sections of equipment to achieve the cleaning effect, the cleaning efficiency is low, and the phenomenon of hole plugging is effectively prevented

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