Rock bits and inserts therefor
US4811801A · kind A · utility
383Cited by
16References
60Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1988 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Mar 16, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is a rock bit insert including a polycrystalline diamond surface on an insert body having a head portion made from a material with elasticity and thermal expansion properties advantageously tailored for use in three types of rock bits, as well as the three types of rock bits made with such inserts. The three types of bits are a roller cone rock bit adapted to be used with mud as the drilling fluid, a roller cone rock bit adapted to be used with air as the drilling fluid, and a percussion rock bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.