Anchorage system for floating platform - has anchor cable running in pulley system between two cable winders on platform and sea bed anchor

Abstract

Abstract Anchor cable runs from a winch on the platform to an anchor on the sea bed and back to a winding device on the platform, e.g. second winch. The cable can thus be displaced lengthwise without displacement of the anchor. Alternatively, the pulley cable can run between the platform and a submerged anchor buoy which is itself anchored to the sea bed anchor, by an inclined cable. The first winch can comprise two drums, a first for tensioning the cable, and a second, which can be mounted on a carriage movable relative to the first, behind the first for use in winding the cable. A multiple pulley system may be used, the cable passing to the anchor and back several times. The platform may have several such anchorage systems for stability. Total or partial replacement of the cable can be accomplished easily on the platform, and recovery of the cable at the end of the period of use of the platform at a location is made simple. The cable can be moved during use to avoid maximum stresses and the worst conditions acting on only one part of the cable, thus weakening it.

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