METHOD AND DEVICE FOR INSTALLATION OF AN ELONGATED OFFSHORE STRUCTURE

摘要

The present invention relates to a method and device for installation of an offshore elongated offshore structure (2; 6). The device comprises a vessel (10) an outer frame (20) pivotable in relation to the vessel (10) between a substantially horizontal position for transporting the elongated offshore structure (2; 6) to the installation site and a substantially vertical position for installation of the elongated offshore structure (2; 6) at the installation site. A connection device (40) is provided for connection of the elongated offshore structure (2; 6) to the outer frame (20) via a longitudinal actuation device (42). The connection device (40) comprises a first supporting element (41) for providing the elongated offshore structure (2; 6) in a free hanging configuration when the outer frame (20) is in the substantially vertical position. The longitudinal actuation device (42) is provided for lowering the elongated offshore structure (2; 6) towards the seabed when the elongated offshore structure (2; 6) is in the free hanging configuration.