Device to support pillar of oil rig self elevating operation on the sea, and self elevating platform

摘要

A support device for a leg (2) of an off-shore drilling jack-up platform including a separate heightener (3) adapted to be interposed between each leg of the platform and the sea bed so as to increase the depth of installation of the platform. Each heightener is provided with detachable means (4, 7, 11, 12) for connecting the heightener to the lower end (4) of a respective leg (2) which improves the strength thereof.