Roller cutter drill bit and method of forming
US4887493A · kind A · utility
16Cited by
4References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Jul 13, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53439
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rolling cutter (24) for a rotary drill bit (10) having cutting inserts or elements (52) mounted within sockets (54) in a so-called full shrink process. The rolling cutter (24) is heated to a temperature over around 500.degree. F. in a controlled inert atomsphere in an enclosed heat chamber (71) and the inserts (52) are positioned by gravity within the sockets (54) in a slip fit for retention in an interference fit by shrinkage of the cutter body (25).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.