Subsea casing hanger suspension system
US4595063A · kind A · utility
94Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1983 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Sep 26, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsea well casing suspension system whereby each of a plurality of concentric casing strings and its hanger is directly and totally supported on the wellhead housing, independently of all the other strings and their hangers, by a plurality of load ring slips that are components of a packoff assembly for an earlier installed casing string. When the packoff assembly is pressure tested following its installation, the load ring slips rise off the assembly and expand into their mating wellhead housing groove wherein they function to transmit the total hang load of the next casing string and hanger directly to that housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.