Ballast system for tension leg platform

Details Ballast system for tension leg platform Ballast system for tension leg platform

B - Operations, Transporting

63

B

B63B 35/44 (2006.01) B63B 13/00 (2006.01) B63B 39/03 (2006.01)

Patent

CA 2507755

An apparatus and method for ballasting and de-ballasting a vessel (100) having a hull (102) with a plurality of waterlight ballast compartments (X1,X2,X3,8) wherein each ballast compartment has an individual pump caisson (10,20,30,80) extending vertically to the top of the hull, but the ballast/deballast system contains no valves within the hull. An external caisson (56) is used to provide a source of seawater. Several submersible pumps (121,123,111) are available for rigging into and out of the internal and external caissons and provide the ballast and de-ballast operations via an installed manifold system at the top of the columns. Venting (59) of the ballast tanks may be accomplished through a connection to atmosphere near the top of the pump caissons.

L'invention concerne un appareil et un procédé de ballastage et de déballastage d'un navire ayant une coque pourvue d'une pluralité de compartiments de ballastage étanches à l'eau. Chaque compartiment de ballastage comprend un caisson de pompe individuel qui s'étend verticalement jusqu'au sommet de la coque mais le système de ballastage/déballastage ne comporte aucune valve dans la coque. On utilise un caisson externe comme source d'eau de mer. Plusieurs pompes submersibles permettent la connexion et la déconnexion des caissons internes et externe ainsi que les opérations de ballastage et déballastage par un système de rampe installé au sommet des colonnes. La ventilation des citernes de ballast peut être accomplie par un raccord à l'atmosphère à proximité du sommet des caissons de pompes.

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