Production casing tieback connector assembly
US4408784A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1981 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | Mar 6, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/038
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A connector assembly for connecting a production casing (38) to a subsea wellhead (10) from a tensioned leg platform. A funnel (46) external to the wellhead, guides and aligns the conductor during installation and places a limit on the angular deflection of the conductor relative to the wellhead. The conductor includes at its lower end a tieback joint (44) which is pulled down, aligned, and sealed against the casing hanger (24) with a floating bushing (64) which also preloads the seal (66). The flexibility of the tieback joint (44) in relation to the angular deflection permitted is such that the surfaces of the seal (66) will not move; and preferably the preload on the seal is not removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.