Coal mine underground explosion proof type electromagnetic wave wireless measurement while drilling system and application method thereof

Abstract

The invention relates to measurement while drilling systems, in particular to a coal mine underground explosion proof type electromagnetic wave wireless measurement while drilling system and an application method thereof. The coal mine underground explosion proof type electromagnetic wave wireless measurement while drilling system comprises a hole inner instrument and a hole opening instrument, wherein the hole inner instrument comprises a measuring short section 1, a rechargeable battery cartridge 2 and a transmission control short section 3, and the hole opening instrument comprises a receiving antenna 4 and an explosion proof computer 5. When the system works, engineering parameters of the hole inner of a drill hole are measured by the hole inner instrument in real time, the data is transmitted to the hole opening through a drill pipe rod and coal measure strata in an electromagnetic wave wireless transmission mode, and the data is sent to the explosion proof computer 5 for being processed and displayed after the data is received by the hole opening receiving antenna. The system has working modes of continuous working and intermittent working, electromagnetic waves are used as a signal carrier, electromagnetic pulses are used as a data transmission mode, and the drill hole track repetition measurement or the measurement of the engineering parameters of the hole inner of the drill hole can be carried out without communication cables. The system is versatile, real-time and explosion-proof.

Description

technical field [0001] The invention relates to a measurement-while-drilling system, in particular to an explosion-proof electromagnetic wave wireless measurement-while-drilling system in underground coal mines and a usage method thereof. Background technique [0002] Underground coal mine drilling construction is an important part of the drilling technology field in my country, and it is an important prevention and control measure for safety disasters in mine construction and production processes such as underground gas disasters in coal mines, floor water inrush and rock impact pressure. In the initial stage of underground drilling in coal mines, rotary drilling and directional drilling with stable combined drilling tools are mainly used, and single-point inclinometers or multi-point inclinometers can be used to retest the boreholes, so that the boreholes can be re-measured after the drilling is completed However, due to the need for special purchase of inclinometers, most...

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Problems solved by technology

However, due to the underground coal mine with high humidity, large dust and explosive gas, the construction conditions and environment are relatively poor, and the electrical performance and explosion-proof performance of the instrument are required to be higher. To directly introduce the measurement-while-drilling system used in the field of surface oil drilling to the construction of underground coal mine drilling, it is necessary to develop a corresponding wireless measurement-while-drilling system in combination with the characteristics of underground coal mine drilling

[0006] However, in coal mines, the measurement-while-drilling directional drilling technology is still in the development stage, and the use of the electromagnetic wave wireless measurement-while-drilling system with explosion-proof characteristics has not yet been clearly reported.

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