Access method between marine structures and apparatus

B - Operations – Transporting – 63 – B

Patent

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B63B 27/14 (2006.01) B63B 27/18 (2006.01)

Patent

CA 2545287

Access means are provided for accessing a fixed offshore structure such as a wind turbine (70), larger vessel or the like form a smaller transfer vessel (50), or for providing for transfer between vessels. One or more guide wires (12) are connected from the vessel (50) to the fixed structure (70) or second vessel and placed in tension such as by directing the transfer vessel away from the fixed structure. In one embodiment, inflatable, members are suspendable from the guide wires and inflation of the inflatable members causes them to extend along the guide wires to form an access surface (56) across which personnel may walk to access the fixed structure or second vessel from the first vessel. Mounting means are also provided which accommodate relative rotational, translational and pitching movement of the apparatus and vessel, caused by wave motion. In another embodiment, a bridge member is retained on a runway of the first vessel and deployed using said guide wires (12).

L'invention concerne des moyens d'accès permettant d'accéder à une structure en mer fixe telle qu'une éolienne (70), ou à un vaisseau plus grand ou similaire à partir d'un vaisseau de transfert plus petit (50), ou permettant d'effectuer un transfert entre des vaisseaux. Un ou plusieurs câbles guides (12) sont connectés à partir du vaisseau (50) à la structure fixe (70) ou au second vaisseau et placés sous tension par exemple en éloignant le vaisseau de transfert loin de la structure fixe. Dans un mode de réalisation de cette invention, des éléments gonflables peuvent être suspendus à partir des câbles guides et le gonflement de ces éléments gonflables provoque leur extension le long des câbles guides pour former une surface d'accès (56) à travers laquelle le personnel peut marcher pour accéder à la structure fixe ou au second vaisseau à partir du premier vaisseau. Des moyens d'assemblage permettent un mouvement relatif de rotation, de translation et de tangage de l'appareil et du vaisseau, ce mouvement étant provoqué par le mouvement des vagues. Dans un autre mode de réalisation, un élément de pont est retenu sur une coursive du premier navire et déployé au moyen des câbles guides susmentionnés (12).

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