Microwave-assisted supercritical carbon dioxide jet drilling device and method

A carbon dioxide and microwave-assisted technology, which is applied in the direction of liquid/gas jet drilling, drill bits, drill pipes, etc., can solve the problems of low drilling efficiency and tool wear, so as to improve the rock breaking efficiency, solve the wear problem, and the rock breaking range big effect
CN112796664APending Publication Date: 2021-05-14CHINA UNIV OF MINING & TECH (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH (BEIJING)
Publication Date
2021-05-14

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Abstract

The invention relates to a microwave-assisted supercritical carbon dioxide jet drilling device and method. The problems that a drill bit is seriously abraded, the drill bit is frequently taken off and replaced, and the drilling aging is seriously affected in a traditional mechanical rock breaking method are solved. The drilling efficiency is improved through the process that two kinds of input energy of microwave irradiation and supercritical carbon dioxide jet are organically matched. The drilling device has the mode that rotary jet and direct jet alternately act to carry out erosion damage on rock. A jet fluid nozzle controls the jet speed through a ball valve, and the drilling efficiency is improved. The strength of the rock is effectively reduced through the permeation effect of supercritical carbon dioxide and the expansion effect of the supercritical carbon dioxide under microwave irradiation. Compared with a conventional drilling device, the drilling capacity of the device for rock masses with different strengths can be greatly improved, and the drilling efficiency is greatly improved.
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Description

Technical field

[0001] The present invention relates to the field of rock drilling, and in particular, a drilling apparatus and method for microwave assist supercritical carbon dioxide jets.Background technique

[0002] The crushing method and technical research of hard rocks has been a long-term concern for mining, civil, military and other industries. For non-coal mines of hard rocks, if we use traditional mechanical rock diamonds, it will cause seriousness of the drill, and the frequent economic competitiveness of the drill bit is changed, or due to the increase in maintenance, it cannot be achieved enough Production, even if we use impact water pressure to break the rock, there is also a rock limit, but the process of two or more input energy combinations can break through the looping limit of the process of energy when an energy input is used.

[0003] Microwaves are characterized by high heat transfer and high permeability, long penetration, and easy control, and supercritical carbon di...

Claims

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