Earth-boring drill bits
US4244432A · kind A · utility
54Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1978 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Jun 8, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/573
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to the design of earth bore-hole drill bits employing shaped preform cutters containing hard abrasive materials, such as diamonds, the cutters being mounted in companion preformed sockets in a hard metal bit matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.