Seal
US4109942A · kind A · utility
23Cited by
9References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1977 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Apr 7, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil well pipe suspension apparatus including a wellhead having a pipe hanger supported therein and a christmas tree supported thereon, a frusto-conical metal gasket providing a metal-to-metal seal between the hanger and the wellhead, and an "X" cross section resilient metal gasket providing a metal-to-metal seal between the hanger and the christmas tree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.