Bearing insert sleeve for roller cone bit
US7387177B2 · kind B2 · utility
55Cited by
18References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2006 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Oct 18, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth boring bit has a bearing pin with a sleeve mounted on it. The sleeve is fixed against rotation but able to float relative to the bearing pin. A cone fits over and forms a bearing surface with the sleeve. The sleeve and bearing pin are configured to have a clearance between them that has a forward portion that progressively decreases in a rearward direction. The clearance progressively decreases in a forward direction from the rearward end of the sleeve. The cone and the sleeve are able to tilt in unison with each other relative to the bearing pin when the bit is loaded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.