Drill bit with suction jet means
US4240513A · kind A · utility
23Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1978 |
| Grant date | Dec 23, 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 vertical fluid flushing jet is directed towards the hole bottom between two adjacent rollers and at least one upwardly directed education jet is created. The nozzle delivering the flushing jet opens at a distance from between 1/3 H and 4/5 H from the hole bottom, H being the height of the cutters measured in a direction parallel to the bit axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.