Low projection inserts for rock bits
US7600590B2 · kind B2 · utility
0Cited by
13References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2005 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Mar 1, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/50
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth boring bit has an outer row of inserts located within extra deep holes. Each of the holes has a cylindrical sidewall with a depth greater than the length of the barrel of the insert mounted within. The difference in depth is at least equal to a distorted entry zone in the hole. A portion of the sidewall that includes the entry zone surrounds the cutting end, reducing the projection of the cutting end from the land.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.