Abstract: A tank installation for the storage of liquids, especially oil in a floating storage or production installation, including a number of tanks which are connected to pipe systems for supply of liquid to or removal of liquid from the tanks. The installation includes a central section around which the tanks are arranged in such a manner that each tank has an inner sidewall portion bordering on the central section, and the pipe systems are arranged in the central section and include radially extending pipe lengths that are connected to respective tanks.

Abstract: Platform for drilling after or production of hydrocarbons at sea, consisting of a semi-submersible platform body which supports drilling and/or production equipment on its upper surface. The platform body is designed as a vertical mainly flat bottomed cylinder which is provided with at least one peripheral circular cut-out in the lower section of the cylinder since the centre of buoyancy for the submerged section of the platform is positioned lower than the centre of gravity of the platform.