Fremgangsmate for flytting av offshore-konstruksjon

摘要

A method for lifting and transporting a tubular jacket structure for a stationary offshore structure utilizes elongate buoyancy bodies which are towed in horizontal position to the jacket structure and ballasted to an upright position before they are attached to the jacket above and under the sea surface (3,Fig 1) whereupon the buoyancy bodies (6) are deballasted in order to lift the jacket structure and permit towing thereof in the upright position. In order to simplify and assure safe lifting force transmission between the buoyancy bodies and the jacket structure (1), each buoyancy body (6) is attached to a leg (4) of the tubular jacket, and substantially all the lifting force from the buoyancy body is transmitted to a force receiving bracket (13) welded to the respective leg (4) at a location above the sea surface (3, Fig 1), from a force transmitting device (11 and 12, Fig 11) at the upper end of the upright buoyancy body.