Well pipe hanger with metal sealing annulus valve
US5044432A · kind A · utility
16Cited by
14References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1990 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Aug 10, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well pipe hanger with a metal sealing annulus valve comprising an axially positionable annular metal seal element with a pair of radially spaced annular sealing surfaces that cooperate with annular metallic sealing surfaces on adjacent well elements to establish a metal-to-metal seal between said elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.