System for offshore operations
US4893965A · kind A · utility
Inventor
Key dates
| Filing date | Mar 3, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Mar 3, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B35/4406
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system for offshore operations include a column 1 extending above sea level from the seabed, which is connected by a bridge 2 to a semisubmersible offshore oil production platform 3. The connection of the bridge 2 to the platform 3 is achieved by an improved joint arrangement which permits relative rotation about both substantially vertical and horizontal axes to reduce loads transmitted to the column. The column 1 is connected by a universal joint arrangement 4 to a base on the seabed. The joint 4 has radially outwardly distributed joint surfaces which provides an axial passageway through the joint for risers. The joint arrangement includes a first main joint and a second normally unloaded ball joint which takes up the column load in the event of failure of the first joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.