Bevel gear set reversing underground pulse jet supercharging device

Abstract

The invention provides a bevel gear set reversing underground pulse jet supercharging device capable of producing ultrahigh pressure pulse cavitation jet, and is applicable to increasing the speed of drilling a deep well and an ultra-deep well. The supercharging device comprises a bypass valve assembly, a power assembly, a reversing assembly and a supercharging cavitation assembly, and is a special underground supercharging tool for ultrahigh pressure pulse cavitation jet assisted drilling. The lower end of the device is directly connected with a drill bit. In normal drilling, a drilling fluid passes through a bypass valve to drive a screw motor to provide power for the underground supercharging device, and the rotational motion of the screw motor is enabled to be transformed into the up-and-down reciprocating motion of a plunger through the action of a sealed bevel gear set reversing mechanism, so that the purpose of pulse supercharging of one part of the drilling fluid is achieved. The ultrahigh pressure pulse flow of the fluid is formed through the reciprocating motion of the plunger, and the ultrahigh pressure pulse cavitation jet is formed through the action of a cavitation nozzle at the bottom of the device, and is transmitted to the shaft bottom to break rocks to improve the drilling and the rock breaking efficiency and the cutting carrying efficiency and achieve the purpose of quickly rock breaking.

Description

technical field [0001] The invention patent relates to a speed-increasing drilling device for deep wells and ultra-deep wells. The device has dual functions of downhole pressurization and pulsed cavitation jet generation, which can increase the drilling speed of deep wells. Background technique [0002] With the exploration and development of oil and natural gas resources to deep formations, deep wells and ultra-deep wells have become a difficult problem in drilling, and their salient features are low mechanical penetration rate and high drilling cost. Ultra-high pressure jet technology combined with mechanical rock breaking is one of the effective means of breaking rock efficiently. At present, the existing supercharging devices include static pressure supercharging devices, jet supercharging devices, shock-absorbing supercharging devices, etc. These supercharging devices The internal structure of the drill is complex, and the continuous power source cannot be guaranteed to...

AI Technical Summary

Problems solved by technology

The invention provides a continuous power source for downhole pressurization through a screw motor, reduces the dependence on the external environment, overcomes the defects of short life of the pressurization device due to wear of internal parts and cannot continuously provide pressurization effect, and utilizes pulsed cavitation jets to achieve high efficiency. ability to break rock

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