Reverse well drilling equipment and process for gas cooling and deslagging under water shortage environment

Abstract

The invention discloses reverse well drilling equipment and process for gas cooling and deslagging under a water shortage environment. The reverse well drilling equipment comprises a reverse well drilling machine hydraulic control system, an air cooling cooler and an air compressor, wherein an oil return main pipe of the reverse well drilling machine hydraulic control system is in fluid communication with a high-temperature hydraulic oil inlet of the air cooling cooler, and a low-temperature hydraulic oil outlet of the air cooling cooler is in fluid communication with an oil return port of a hydraulic oil tank; cold air discharged from an air outlet of the air compressor enters the lower part of a drill bit; and during reverse well pilot hole drilling, high-pressure compressed air is usedfor well washing to lift broken rock slag generated by a bottom hole drilling tool, and during reverse well reaming drilling, high-pressure compressed air is used for cooling a reaming bit hob. According to the reverse well drilling equipment and process, the problems about heat dissipation can be solved without a clean water source, and effective cooling of reverse well drilling hydraulic oil andthe reaming bit hob and effective collection and discharge of pilot hole drilling rock slag can be realized.

Description

technical field [0001] The invention relates to the technical field of raising well drilling. Specifically, it is a raising drilling equipment and process for gas cooling and slag discharge in a water-deficient environment. Background technique [0002] Raise drilling rigs have played an important role in hydropower, mining, transportation, construction and other fields since they were widely used in underground engineering construction in the 1980s. With the rapid development of my country's national economy, the scale of underground engineering construction is increasing day by day, especially the construction of traffic tunnels and metallurgical mines is very large, and it is necessary to drill ventilation shafts in the mountains. [0003] The auxiliary system of the raise drilling rig is composed of cooling, slag discharge, circulation, measurement, water supply and power supply. At present, the main links that require water sources in the raising well construction pro...

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Problems solved by technology

[0004] When roads, railway tunnels or metallurgical mines are located in areas with harsh natural climates such as Gobi, high altitude, high cold, severe water shortage and drought, or poor engineering geological conditions such as unstable surrounding rocks, broken and cracked zones, the construction water is faced Great difficulties, such as hydraulic oil, reaming drill bit and hob cannot be cooled due to insufficient water supply, problems such as poor lifting and discharge of broken rock slag, it is difficult to ensure the normal implementation of the process and the normal progress of the project

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