Repetitive pulsed electric discharge apparatuses and methods of use
US10060195B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 2015 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Aug 10, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/15
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Electrocrushing drill bits comprising one or more high voltage electrodes surrounded by a ground or current return structure, which can be a ring or a comprise rod shaped (i.e. cylindrical) electrodes. Openings in the rim of the current return structure facilitate removal of drilling debris and bubbles created by the electrocrushing process out from the bottom face of the bit and up the wellbore. The high voltage electrodes can be arranged in a circle. The current return structure may partially cover the bottom face of the drill bit, thereby enclosing the high voltage electrodes in openings that may be sector shaped. Also a method and apparatus for dividing a flow of drilling fluid both to sweep drilling debris and bubbles out of the drill bit and hole and to cool high power electrical components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.