Reinforced rotary drill bit
US5099935A · kind A · utility
14Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Oct 29, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/567
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary drill bit for boring earth formations is provided which includes a main body portion of a hard metal matrix material and at least one protrusion or shoulder formed of the same matrix material. On the protrusion is mounted a cutting element. Means for reinforcing the protrusion are provided and extend between the main body portion of the bit and the protrusion. The reinforcements add impact strength to the bit and increase the resistance of the bit to cracking in areas supporting the cutting element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.