Device for hybrid riser for the sub-sea transportation of petroleum products
US6082391A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 4, 1998 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Sep 4, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/402
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A device for transporting petroleum products in deep waters from the seabed up to a floating or semi-submersible surface structure wherein at least one rigid and straight hybrid riser extends vertically. The hybrid riser has a rigid central hollow tubular structure surrounded by a cylindrical block of syntactic material which provides buoyancy and thermal insulation for the riser. A plurality of rigid pipelines are embedded in the syntactic material and surround the central tubular structure for receiving petroleum products from wells on the sea bed. The bottom of the riser is connected to a suction anchor at the sea bed. A submerged float is fixed to the top of the riser and exerts an upward vertical force thereon. Flexible pipelines connect the rigid pipelines in the riser to the floating or semi-submersible structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.