Drill bit having cutting elements with heat removal cores
US4478297A · kind A · utility
54Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/61
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein having polycrystalline diamond cutting elements mounted on said inserts. Said inserts each having a longitudinal recess therein filled with a soft, heat conducting metal operable to facilitate the transfer of heat away from said cutting elements. The drill bit is also provided with removable and replacable nozzles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.