Combined drilling tool with self-sealing hole function

Abstract

The invention discloses a combined drilling tool with a self-sealing hole function. The combined drilling tool comprises a dynamic positioning drill rod, a combined drill bit and a hole sealing device; the combined drill bit is arranged at the first end of the dynamic positioning drill rod; the hole sealing device is a cylindrical barrel, and the combined drill bit and the dynamic positioning drill rod are arranged in the hole sealing device in a penetrating manner; the front end of the combined drill bit extends out of an end opening of the hole sealing device; a gap for coal water slag to pass through is formed between the combined drill bit and the end opening of the hole sealing device; a cutting blade arranged in a surrounding mode is formed at the end opening of the hole sealing device; and an inner taper hole is formed in the end opening of the other end of the hole sealing device. a flange buckle is arranged on the inner side of the inner taper hole. According to the combined drilling tool, the hole sealing process is simple, hole opening, hole expanding and hole sealing are completed at a time, the hole sealing time is effectively shortened, the hole sealing efficiency is improved, and the labor intensity of workers is reduced.

Description

technical field [0001] The invention belongs to the technical field of drilling and sealing, and in particular relates to a combined drilling tool with the function of self-sealing holes. Background technique [0002] In the process of drilling underground coal mines, it is necessary to seal the holes to realize the collection of coal water slag during the construction process and avoid the leakage of gas. The hole sealing device in the prior art is mainly two kinds, and a kind of is by drilling on the rock arm, reaming after drilling, plugging in the expandable hollow hole sealing device after reaming a certain distance, then drill The drilling tool passes through the hole sealer for construction and drilling. This method has difficulties in replacing the drilling tool during use. The installation and disassembly of the hole sealer is completely manual, which has potential safety hazards and difficult operations. A rubber sealing body with compressible properties is arrang...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned problems such as difficulty in sealing holes and low sealing efficiency during underground drilling construction, and provide a combined drilling tool with self-sealing function. Hole and sealing are completed at one time, which effectively saves the time of sealing, improves the efficiency of sealing, and reduces the labor intensity of workers

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