Rock bit cone retention system
US6170582A · kind A · utility
19Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jul 1, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller cone drill bit includes a bit body adapted to be rotated about a longitudinal axis. At least one leg depends from the bit body, and a journal is cantilevered from the leg. A roller cone is rotatably mounted on the journal. A cone retention member is disposed between a first slot in the journal and a corresponding second slot in the roller cone. An access hole runs through the journal to the first slot, penetrating the first slot at a location away from the top dead center of the first slot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.