Underground Supercharger for Jet Drilling via Drill String Vibrations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rock breaking methods during drilling, such as mechanical and jet hydraulic methods, face inefficiencies and reliability issues as drilling depth increases, particularly due to the limitations of existing underground supercharging devices which are complex, unreliable, and inefficient.
Innovation Solution
An impulse-type underground supercharged jet drilling method and device that utilizes the vibrations of a drill string or Weight on Bit (WOB) variation to intermittently supercharge drilling fluid, creating a high-pressure jet through a nozzle for enhanced rock breaking, improving efficiency and speed by converting kinetic or potential energy into pressure energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If surface supercharging is used to increase jet velocity, then downhole jet velocity is improved, but the method becomes unfeasible due to low efficiency, high cost and insecurity
Solution Approach 1:
The patent introduces an underground supercharger as an intermediary device located at the drill bit to boost fluid pressure locally. This mediator converts the kinetic energy of the incoming fluid into pressure energy through a diffuser, achieving high jet velocity without requiring surface supercharging infrastructure, thus resolving the contradiction between jet velocity improvement and drilling efficiency
Solution Approach 2:
The patent replaces the mechanical surface supercharging system with a fluid dynamic-based underground supercharger. The supercharger uses the kinetic energy of the incoming fluid itself to generate high pressure through diffuser design, eliminating the need for external mechanical pumping systems and reducing operational costs while maintaining high jet velocity
2Stress or pressure
If existing underground superchargers are used, then some supercharging effect is achieved, but they suffer from complex structure, low reliability, low efficiency, or insufficient supercharging
Solution Approach 1:
The patent divides the supercharging function into distinct components: an inlet passage for fluid intake, a diffuser for pressure conversion, and an outlet passage for high-pressure fluid discharge. This segmentation allows each component to be optimized independently and simplifies the overall structure compared to integrated complex systems, while achieving reliable high-pressure output
Solution Approach 2:
The patent inverts the conventional approach by using a diffuser (expanding cross-section) instead of a nozzle (contracting cross-section) as the primary pressure-generating element. The diffuser converts kinetic energy to pressure energy through gradual expansion, achieving high pressure with a simpler structure than conventional nozzle-based superchargers
Data Source
AI summary
An impulse-type underground supercharged jet drilling method and device. The impulse-type underground supercharged jet drilling method uses up and down vibrations of a drill string or weight on bit variation during the drilling process, so that an upper joint connected to the drill string drives a housing and a supercharging cylinder block to move up and down relative to a supercharging piston, while the supercharging piston, a high pressure line, and a drive shaft disposed outside the high pressure line make a reciprocally retractable movement relative to the housing. As a result, some working fluid entering the supercharging cylinder block is intermittently supercharged, and discharged from a high pressure fluid passage disposed in the supercharging piston and the high pressure line. The device effectively imparts an underground supercharging to parts of the drilling fluid, thus improving the rock breaking efficiency and the drilling speed.