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Multi-electrode-pair electrical crushing drill bit and electrical crushing experiment device

An experimental device and multi-electrode technology, applied in the direction of the driving device, drill bit, measuring device, etc. for drilling in the borehole, can solve the problems that need to be further verified, and achieve the effect of simple structure, high reliability and low energy loss

Pending Publication Date: 2018-06-29
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water jet rock breaking, laser drilling rock breaking, ultrasonic rock breaking are still in the stage of experimental verification, and the feasibility of being used in drilling needs to be further verified

Method used

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  • Multi-electrode-pair electrical crushing drill bit and electrical crushing experiment device
  • Multi-electrode-pair electrical crushing drill bit and electrical crushing experiment device
  • Multi-electrode-pair electrical crushing drill bit and electrical crushing experiment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: A multi-electrode pair electric crushing drill bit and electric crushing experimental device of the present invention, its structure is as follows figure 1 , 2, 3, 4, 5, 6, the electric crushing experimental device includes guide roller 1, steel wire rope 2, control device 3, multi-electrode pair electric crushing drill 4, pulse power supply 5, confining pressure cylinder assembly 6, hydraulic pump station 7, Inlet and outlet water pump 8, aluminum profile support 9 of experimental device, rope arrangement 10, and guide roller 1 are used to realize the guidance of steel wire rope 2 and cable 4.6. tight state; the wire rope 2 is used to lift and lower the multi-electrode pair electric crushing drill bit; the control device 3 is used to control the start and stop of the hydraulic pump station, the inlet and outlet water pump and the rope discharge device; the multi-electrode pair electric crushing drill bit 4 includes the lifting lug 4.1, the drill bit Arm ...

Embodiment 2

[0048] Embodiment 2: A multi-electrode pair electric crushing drill bit and an electric crushing experimental device of the present invention have the same structure as in Embodiment 1. When performing an electric pulse rock breaking experiment, the control device 3 controls the hydraulic pump station 7 to supply the confining pressure cylinder 6.1 Oil, add confining pressure to the rock sample 6.3, the control device 3 controls the rope discharge device 10 to lower the wire rope 2 and the cable 4.6, the multi-electrode pair electric crushing drill bit 4 descends, the control device 3 controls the inlet and outlet water pump 8 to realize the ionization of the water medium 6.2 in the confining pressure cylinder Circulation in the component 6, when the multi-electrode pair electric crushing drill bit 4 is in contact with the rock sample 6.3, the pulse power supply 5 is discharged, and the experimental research on the drill bit electrodes, insulating materials, drilling parameters ...

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Abstract

The invention relates to a multi-electrode-pair electrical crushing drill bit and an electrical crushing experiment device. Electric pulse is adopted to supply power, the output pulse power upwellingtime of the multi-electrode-pair electrical crushing drill bit and the electrical crushing experiment device is 50-500ns, a plasma channel is generated by striking through rock at first, and the rockis crushed electrically; the drill bit is provided with a plurality of electrode pairs, and the contact between electrodes and the rock is point contact, and the drill bit has the characteristics of high rock crushing efficiency and low crushing energy consumption; the electrical crushing experiment device can simulate the rock under a high pressure environment to carry out the electrical pulse crushing experiment and make researches on drill bit electrodes, insulation materials, drilling parameters, the rock fracture mechanism of multiple physical fields and the like, and has the characteristics of simple structure, high reliability and the like. Electrical pulse crushing rock drilling is a potential and near-industrial rock crushing drilling method up to now.

Description

technical field [0001] The invention relates to the field of drilling, and more specifically relates to a multi-electrode pair electrofracture drill bit and an electrofracture experimental device. Background technique [0002] Exploration and development drilling fields such as oil and gas continue to expand, and research on efficient rock-breaking drilling technology is imperative to improve drilling efficiency. Traditional mechanical drilling has the disadvantages of low drilling efficiency and high drilling cost when drilling deep and ultra-deep holes with high temperature and high pressure. At present, the cutting-edge non-mechanical rock breaking methods mainly include: water jet rock breaking, particle jet rock breaking, laser drilling rock breaking, plasma rock breaking, ultrasonic rock breaking and thermal rock breaking, etc. The technical requirements of the equipment are high; laser drilling and rock breaking are limited by the power of the laser, and it is still ...

Claims

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Application Information

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IPC IPC(8): E21B10/00E21B4/04G01R31/00G01M13/00
CPCE21B4/04E21B10/00G01M13/00G01R31/00Y02A90/30
Inventor 李昌平谭现锋段隆臣宋明春
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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