Divergent fluid nozzle for drilling tool
US5293946A · kind A · utility
23Cited by
5References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 16, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Sep 16, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/0078
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling fluid nozzle 12 mounted in the end of an earth drilling tool 10 has a flow channel defined by a surrounding wall 16 which diverges at an angle of 30.degree. or less, such that the exiting fluid "adheres" to the wall in a laminar manner due to the Coanda effect. This configuration minimizes clogging, and implements ready unclogging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.