Seal with dynamic sealing surface at the outside diameter
US8020638B2 · kind B2 · utility
7Cited by
50References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2006 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | May 11, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A seal assembly for sealing between a journal shaft and a rotating cone cutter of a drill bit. In an embodiment, the seal assembly comprises a seal gland positioned between the journal shaft and the cone cutter. In addition, the seal assembly comprises an annular seal body disposed about the journal shaft within an annular recess. The seal body comprises a dynamic sealing surface at its outer diameter D1 that forms a dynamic seal with the sealing surface of the recess and a static sealing surface at its inner diameter D2 that forms a static seal with an outer bearing surface of the journal shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.