Elastomeric seal assembly having auxiliary annular seal components
US7461708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2004 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Jul 1, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit and seal assembly therefor include a seal gland, an elastomeric sealing seal disposed in the seal gland and having a dynamic sealing surface and a static sealing surface, and at least one auxiliary elastomeric annular seal member disposed between the static sealing surface of the sealing seal and the seal gland. The auxiliary annular seal member serves to prevent relative movement of the sealing seal relative to the surfaces of the seal gland and to permit sealing seals of various cross-sections and shapes to adapt to and function with a conventionally sized and shaped gland. The auxiliary annular seal member is sized and configured and its material properties selected so as to impart the appropriate squeeze to the sealing seal to provide the desired contact pressure and footprint. Choice of the appropriate auxiliary seal member may permit the same sized seal to be employed in seal glands of differing sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.