Patent ID: 8522880
Filing Date: 2013-09-03
Classification: B63B,E21B

Abstract:
1. A floating offshore structure for offshore hydrocarbon production, the offshore structure comprising: a moonpool for receiving multiple production risers having a lower end connected to a hydrocarbon well on a sea floor and an upper end located in the moonpool; a drilling station located at the moonpool, the drilling station comprising drilling equipment defining a firing line; a production riser support system for supporting the multiple risers at their upper ends while lower ends are connected to the hydrocarbon well, the production riser support system comprising: a plurality of carts, each cart comprising: a cart support structure, the cart support structure defining multiple production docks and at least one drilling dock, each dock suitable for supporting one of said carts; and a crane which is movable supported by a crane guide for movement along a transport track, the crane guide extends within a substantial horizontal plane and bridges at least part of the moonpool, for transferring one of the multiple carts between one of the multiple production docks and the at least one drilling dock, wherein each cart is suitable for being transferred by the crane between a production dock and the drilling dock.