Underground coal mine anti-explosion mud-pulse wireless measurement while-drilling system and using method thereof

Abstract

The invention relates to a measurement while drilling system, in particular to an underground coal mine anti-explosion mud-pulse wireless measurement while drilling system and a using method of the underground coal mine anti-explosion mud-pulse wireless measurement while drilling system. The underground coal mine anti-explosion mud-pulse wireless measurement while drilling system consists of a hole-in assembly and a hole-opening assembly, wherein the hole-in assembly comprises an anti-explosion exploring tube, an anti-explosion battery cylinder and an anti-explosion pulse generator, and the hole-opening assembly comprises an anti-explosion pressure transmitter and an anti-explosion computer and the like. According to the system, in the underground coal mine drilling construction process, a hole-in instrument is utilized for measuring the hole-in engineering parameters such as track parameters (dip angles and azimuth angles) of a drilling hole, state parameters (tool facing angles) of a directional drilling tool and the like in real time, and then the data is transmitted to a hole-opening instrument through a hydraulic channel in a wireless transmission manner and is processed and displayed by the anti-explosion computer at a hole opening. The system takes the mud as a signal carrier, adopts mud pulses as a data transmission mode, does not need to use a cable, not only can be used for directional drilling, but also can be used for rotary drilling, and has a real-time property and an anti-explosion property.

Description

Technical field [0001] The invention relates to a measurement while drilling system, in particular to a mine underground explosion-proof mud pulse wireless measurement while drilling system and a use method thereof. Background technique [0002] Measurement while drilling is the technical abbreviation for real-time measurement and upload of downhole (in-hole) information during drilling (hole). Among the well-known technologies, borehole measurement while drilling technology has long been known. The measurement while drilling system can be divided into wired measurement while drilling and wireless measurement while drilling according to different information transmission media. At present, MWD systems are mainly used in the oil drilling field and coal mine underground drilling field. Among them, in the field of oil drilling, wireless measurement while drilling systems are the most widely used, and mud pulses are mainly used as signal transmission methods, and the corresponding ...

AI Technical Summary

Problems solved by technology

However, since the measurement-while-drilling systems and equipment used in the field of surface oil drilling are designed for the drilling construction of surface wells, their apertures are larger, and the formation and environment for construction are better; relatively speaking, they have high humidity, large dust and gas Underground coal mines with 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. The construction technology and drilling parameters are quite different from those of oil drilling. The system is directly applied to the underground drilling construction of coal mines. It is necessary to develop a corresponding wireless measurement system while drilling in combination with the characteristics of underground drilling in coal mines.

[0004] However, in coal mines, measurement-while-drilling technology is still in the development stage, and the use of wireless measurement-while-drilling systems with explosion-proof features has not been clearly reported.

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