Drill bit for jet assisted rotary drilling
US4535853A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 23, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Dec 23, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/602
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to the geometry of drill bits for jet assisted rotary drilling. According to the invention there is used a drill bit comprising platelets of small radial dimension disposed about a central burster in a discontinuous peripheral crown axially extending said drill bit, channels for supplying pressurized fluid opening from the crown close to the platelets. Said platelets are preferably separated from one another by rectilinear discharge ramps. A drill bit in accordance with this invention can be manufactured e.g. by turning or milling. It can be applied for drilling rock formations in mines, and other hard materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.