Metal-to-metal annulus packoff for a subsea wellhead system
US5174376A · kind A · utility
167Cited by
22References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1990 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Dec 21, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An all-metal, well annulus packoff assembly for establishing a high pressure, corrosion resistant metal-to-metal seal between a wellhead housing and a casing hanger, including an annular metallic seal element having a generally upstanding U-shaped cross section that is adapted for non-rotational sequential setting against the hanger and the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.