Drill bit with suction jets
US4222447A · kind A · utility
24Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1978 |
| Grant date | Sep 16, 1980 |
| Priority date | — |
| Expiry date | Nov 21, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary drilling tool has a plurality of rollers, each of which is provided with a specific pair of jets comprising a flushing jet having a downwardly directed component and an upwardly directed eduction jet, these jets being formed on both sides of the plane defined by the bit axis and the roller axis, and the flushing jet being inclined by at least 20.degree. on said plane and substantially tangent to the active part of the roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.