Subsea tubing hanger with multiple vertical bores and concentric seals
US4651831A · kind A · utility
Inventor
Key dates
| Filing date | Jun 7, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Jun 7, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tubing hanger for landing is a subsea wellhead system below a multiple bore valve package in a preferred but not essential orientation with a first concentric and a second eccentric bore both suitable for vertical access for passage of tools and the such like when in the preferred orientation, the first bore being contained within a first concentric seal and the second bore being contained within an annular area outside the first concentric seal and within a second larger concentric seal such than when the tubing hanger is not landed in the preferred orientation vertical access is not provided but the valve package can be landed and hydraulic communication will be provided through both bores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.