Rock bit
US5353885A · kind A · utility
37Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Jul 9, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rock bit is disclosed having a plurality of rolling cone cutters each having a gage row of inserts oriented to face the borehole bottom for crushing the same, and a second row of heel gage inserts which are oriented to face the borehole sidewall for scraping the same, heel inserts are nestled within the profile of the gage inserts in order to alleviate most of the scraping action normally encountered by gage inserts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.