Multi-path combined high-low voltage plasma drilling method, drill bit for drilling and drill bit apparatus for drilling
US11293231B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2020 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Jan 6, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multi-path combined high-low voltage plasma drilling method, a drill bit for drilling and a drill bit apparatus for drilling utilizing this method. The drilling method includes: disposing a plurality of mutually independent plasma generators on a plasma drill bit, wherein the plasma generators are independently connected to a plasma power source on the ground through wires; allowing each of the plasma generators to eject high-frequency pulsed plasma arc under the control of its corresponding combined high-low voltage pulse power source on the ground; ejecting the high-frequency pulsed plasma arc onto a wall of a drilling well, forming impulsive high temperature thermal shock stress inside the rocks on the wall of the drilling well; and breaking the rocks under the shock of thermal stress to form rock debris.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.