Rotary drill bit
US4452324A · kind A · utility
38Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1981 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Oct 19, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/61
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary drill bit, particularly for deep-well drilling, comprising a body (1) having a gauge region, a cutting surface which is defined by projecting cutting members (4) supported at the outer periphery of the body on supporting members and nozzle passages (6 ) through which flushing liquid can flow, and in which at least some of the nozzle passages (6) comprise an outlet region which is directed towards the cutting members and which gives the jets of flushing liquid (10') emerging therefrom an alignment with at least one component facing in the direction of the drillings flowing off along the outer face of the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.