Dual metal seal for a well safety valve
US4583596A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1985 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Sep 13, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7868
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A seat coacting with the flapper of a subsurface well safety valve which includes a solid metal annular seat and an annular flexible metal seal in a recess about the solid seat. The flexible seal has a base secured in the recess and a resilient sealing lip which is generally V-shaped in cross section with one end of one of the legs of the V being connected to the base and sealing against the side of the recess and the other leg extending downwardly beyond the solid seat for making contact with the flapper before the flapper seats on the solid seat. The solid seat and the sealing lip are directed downwardly at an angle with the angle of the sealing lip being greater than the angle of the solid seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.