Offshore jacket installation
US5988949A · kind A · utility
Inventor
Key dates
| Filing date | Jan 10, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Jan 10, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An offshore jacket or compliant tower and method of installing an offshore jacket or compliant tower where the foundation piles do not initially support the jacket. The foundation piles are driven into the sea floor. Two or more temporary support piles are driven into the sea floor. Two or more docking piles are driven into the sea floor and extend a greater height above the sea floor than the foundation piles and the temporary support piles. The jacket, which includes flexpiles, is lowered into position such that it receives the docking piles. The docking piles locate and position the jacket above the temporary support piles and the foundation piles. The jacket is provided with vertical steel tubes that correspond to the location of the temporary support piles. A bulkhead in each vertical steel tube is vertically located such that the jacket is supported and leveled by the temporary support piles and not the foundation piles. The foundation piles and flexpiles are grouted before the platform is installed on the jacket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.