Vortex drill bit
US5632349A · kind A · utility
Inventors
Key dates
| Filing date | Feb 26, 1996 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Feb 26, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit for removing a surface subject to a subsurface pressure and an environmental surface pressure at least equal to the subsurface pressure, which comprises jetting fluid through a nozzle facing and located a predetermined distance from said surface, said nozzle being shaped to eject the fluid in a steam having a higher core pressure than said environmental pressure, said higher pressure stream having adjacent thereto at least one zone of pressure negative relative to said subsurface pressure, said distance being predetermined to expose said surface to said zone of negative pressure, whereby said surface is caused to explode into said zone of negative pressure from the force of said subsurface pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.