Substructure for an offshore platform and method for installing same

摘要

The sub-structure comprises self-floating lower building structure (8) having a stable trim. The tanks (18) are provided in lower building structure, which are dimensioned such that the lower building structure sinks when the tank is flooded. A venting unit (19) is connected to tank. The bearing units (11) are supported on lower building structure and connected with of posts (4) in upright standing arrangement. An independent claim is included for a method for installing a sub-structure for offshore platform.