Method and arrangement for removing soils, particles or fluids from the seabed or from great sea depths
US7950463B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2009 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Apr 7, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C45/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for removing soils, particles or fluids from the seabed or from great sea depths, includes positioning a platform or a vessel above an offshore location, lowering a riser from the vessel or platform to the seabed or great depth, the riser being vented to the atmosphere, sucking soils, particles or fluids with inflow of fluid into the riser and removing them from the riser via an outlet in the riser, the outlet being at a level well below the water surface, by use of a pumping system with a flow return conduit running to a selected location, while keeping the level of the fluid in the riser at a level between the outlet and the surface corresponding with a pressure in the lower end of the riser substantially lower than the sea water pressure at the end of the riser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.