Detachable mooring and cargo transfer system
US4645467A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Apr 5, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B2022/028
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved offshore terminal is described, of the type that includes a riser loosely anchored at the sea floor so its upper end can extend from a deep underwater level up to the surface to moor a tanker and transfer hydrocarbons to it. A weight hangs from the lower end of the column to improved dynamic mooring and, where the riser is disconnected to limit the sink depth of the riser. For movement to the deployed position, the riser is lifted by extending a line downwardly from a winch on the vessel, through a central hole in the connector frame down to the top of the riser, the line being pulled to raise the riser until its upper end lies within the central hole of the connector frame. A perforated upper portion of the riser then is in fluid communication with the inner portion of a fluid swivel, so that hydrocarbons can pass out of a conduit within the riser and into the swivel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.