Rock bit with cavitating jet nozzles
US4185706A · kind A · utility
53Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1978 |
| Grant date | Jan 29, 1980 |
| Priority date | — |
| Expiry date | Nov 17, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention teaches the use of cavitation inducing nozzles in combination with rock bits. The cavitation nozzles enhance the drilling rate by creating catastrophic implosion waves which erode solid material at the bottom of the hole while reducing the localized pressure at the rock tooth interface. Localized pressure reduction reduces the tendency for the cuttings to adhere to the bottom of the hole due to differential pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.