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 an explosion-proof mud pulse wireless measurement-while-drilling system in underground coal mines and a usage method thereof. Background technique [0002] Measurement while drilling is the technical abbreviation for realizing real-time measurement and uploading of downhole (in-hole) information during the drilling (hole) process. In the known technology, the measurement-while-drilling technology of the borehole has long been recognized by people. 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, there are many applications of measurement-while-drilling systems mainly in the field of oil drilling and underground coal mine drilling. Among them, the wireless measurement-while-drilling system is the most widely used in the field o...

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.

Images