Coal mine underground drilling wireless tracking and hole depth measurement device and method

Abstract

The invention discloses a wireless while-drilling track and hole depth measuring device for underground coal mine drilling. , a drilling rig, a probe arranged in the second non-magnetic drill pipe, a first stress wave signal transmitter and a first stress wave signal receiver, and the on-site host is connected to the first stress wave signal transmitter and the first stress wave signal receiver; The probe includes a probe housing, a second stress wave signal transmitter arranged in the probe housing, a driving module for the second stress wave signal transmitter, a second stress wave signal receiver, a second stress wave signal processing module, a single-chip microcomputer and a three-dimensional compass , the first stress wave signal transmitter communicates wirelessly with the second stress wave signal receiver, and the first stress wave signal receiver communicates wirelessly with the second stress wave signal transmitter. The invention can measure the drilling direction, inclination and hole depth while drilling during the drilling process.

Description

technical field [0001] The invention relates to the technical field of measurement-while-drilling of underground coal mine boreholes, in particular to a wireless drilling-while-drilling track and hole depth measurement device and method for underground coal mine boreholes. Background technique [0002] Underground coal mine drilling trajectory and hole depth measurement is an important work for coal mine exploration and drainage holes (used to detect whether there is hidden water in front, and if there is any), and the construction quality inspection of gas pumping holes is an important means to ensure coal mine safety . The traditional drilling trajectory measurement is to pull out the drill pipe after the borehole is drilled, and then push the trajectory measurement probe into the hole, but because the coal mines are soft rocks, it is easy to collapse and block the hole, so that the measurement probe cannot be advanced, resulting in The drilling trajectory cannot be measu...

AI Technical Summary

Problems solved by technology

The traditional drilling trajectory measurement is to pull out the drill pipe after the borehole is drilled, and then push the trajectory measurement probe into the hole, but because the coal mines are soft rocks, it is easy to collapse and block the hole, so that the measurement probe cannot be advanced, resulting in Borehole trajectory cannot be measured

The traditional drilling depth detection method is to calculate the drilling depth by counting the number of drilling rods when pulling out the drilling rods. For deeper holes, it takes a long time to drill, and technicians tend to forget the drill that is put into the drilling hole. Due to the number of rods, the drilling depth cannot be obtained accurately

Some coal mines that use directional drilling rigs for drilling can realize drilling trajectory measurement while drilling, but directional drilling rigs are expensive and need to be used in conjunction with special cable drill rods, and at the same time, drilling depth measurement cannot be performed. Therefore, directional drilling rigs Can not be widely applied in coal mines

In addition, the mud fluid transmission logging technology used in oil drilling cannot be applied because the underground drilling holes in coal mines are all horizontal holes or holes with small inclination angles.

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