Earth boring bit with tilted hydrodynamic thrust bearing
US7465096B2 · kind B2 · utility
0Cited by
17References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2005 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | May 7, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth boring bit has thrust faces with one of the thrust faces being at least partially tilted relative to the other. The bit has a cone rotatably mounted to a bearing pin of the bit body. The thrust faces are in the cone and on an end of the bearing pin. One of the thrust faces is completely flat and perpendicular to the axis of the bearing pin. The other thrust face has a tilted portion that is at a skewed angle relative to the axis. The tilted portion creates converging and diverging zones between the thrust faces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.