Rock bit having a mechanical seal with superior thermal performance
US8783385B2 · kind B2 · utility
4Cited by
8References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2011 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Jan 2, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3404
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A drill tool includes a bit body, at least one bearing shaft extending from the bit body and a cone mounted for rotation on the bearing shaft. A mechanical seal is disposed between the bearing shaft and the cone in a seal gland. The mechanical seal includes a rigid seal ring having a dynamic sealing surface with the cone and another non-sealing surface exposed to an aperture in the seal gland. The mechanical seal further includes at least one cooling channel formed in the another non-sealing surface of the rigid seal ring, the cooling channel having an open end in fluid communication with the aperture in the seal gland.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.