Rotary dual jet flows boring method under high pressure

Abstract

The present invention relates to a high-pressure rotary double-jet drilling method. It is characterized by simultaneously using rotary jetting method and straight jetting method. Said rotary jetting method can form large energy transfer area zone in targent zone and the straight jetting method can partially form energy transfer area zone in the centre of target zone, the rotary jetting method andstraight jetting method are formed into a mutual shearing relationship, the mutual shear of the above-mentioned two jetting methods can produce cavitation action. The high-pressure rotary double-jet nozzle used for said method includes external nozzle and internal nozzle; said internal nozzle is placed in the external nozzle interior. Said invention can make straight jetting method and rotary jetting method be combined together so as to raise utilization efficiency of jetting energy and can drill metal or high-strength non-metal material.

Description

technical field [0001] The invention relates to a drilling method and a drill bit thereof, in particular to a high-pressure rotary double-jet drilling method formed by straight jet flow and rotating jet flow. The method of the invention is particularly suitable for the crushing of rocks. Background technique [0002] In production practice, high-pressure jet rock breaking technology has been widely used and researched as a new type of efficient rock breaking method, but it has always been a research topic to seek a jet method and equipment that can drill holes with large depths and large diameters. unresolved goals. At present, the widely used jet flow forms mainly include straight jet flow and rotating jet flow. The straight jet flow has a large energy transmission distance, and the main way of crushing rocks is impact crushing, which can form crushing channels with large depth but small aperture; rotary jet flow The jet has a larger energy transmission distance, and the ...

AI Technical Summary

Problems solved by technology

The multi-hole nozzle jet is to change the single-hole nozzle into a multi-hole nozzle, and use multiple nozzles to expand the impact area of ​​the jet energy, but this method needs to greatly increase the jet flow rate and because the crushing method is still impact crushing, the utilization efficiency of the jet energy is low

The mechanical rotary nozzle jet uses hydraulic or mechanical energy to drive the entire nozzle to rotate, thereby driving the multi-nozzles distributed on the nozzle to rotate. This rotation driving method has the problems of rotation sealing resistance and life, and needs to consume part of the jet energy and power. The efficiency of jet energy utilization also lower

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