Drilling tool fitted with self-sharpening cutting edges
US5301762A · kind A · utility
18Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1993 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Mar 12, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Self-shaping disk-shaped cutting edge of a drilling tool, comprising an outer diamond-impregnated polycrystalline layer (22) applied onto a tungsten carbide layer (24), each cutting edge being mounted on a support (18) which is integral with the body (12) of the drilling tool. The cutting edge and/or its support (18) have areas (26) of least resistance, such as grooves, which are likely to cause successive fractures, thereby forming an acute relief angle (.alpha.) with the rock to be drilled (28).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.