Drill bit with suction jet means
US4239087A · kind A · utility
24Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1978 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Jan 26, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This drill bit comprises a plurality of rollers provided with cutting teeth or inserts. At least one upwardly directed eduction jet is created and the bit comprises at least one nozzle located between two adjacent rollers and creating at least two fluid jets respectively directed towards these two adjacent rollers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.