Spar with features against vortex induced vibrations

摘要

A spar platform comprising a deck (12), a buoyant tank assembly (14) including a first buoyant section (14a) connected to the deck, a second buoyant section (14b) arranged below the first buoyant section and a buoyant spacing structure interconnecting the first and second buoyant sections in a manner providing a horizontally extending gap (30) between the first and second buoyant sections, a counterweight arranged below the buoyant tank assembly and connected to the buoyant tank assembly by a counterweight (18) spacing structure.