Ice deflector
AssigneeAker Engineering A/S
InventorArve Marthinsen
Life of this patent
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Abstract
A semi-submersible oil platform comprising two pontoons (1), columns (2) extending up from the pontoons and supporting a deck structure (3), and stays (4) extending transversally of the pontoons between the columns (2), is provided with a plough-like protecting device (8) for diverting drifting objects, e.g. ice bodies which are not sufficiently large to be detected by radar, but which, nevertheless, could cause considerable damage to the horizontal stays (4) of the platform and the drill string.
Claims17
An arrangement in a semi-submersible oil platform, comprising two pontoons (1), columns (2) extending up from the pontoons for supporting a deck structure (3), and stays (4) extending transversely of the pontoons between at least some of the columns, characterized in that, between the pontoons (1), at one of the ends of each of the pontoons, a substantially submersed, plough-like, resiliently mounted protecting device (8) pivotally supported in attachment points (7) on the pontoons (1), and maintained in a generally horizontal position by means of a stay (9), which extends between the protecting device (8) and the deck structure (3), said protecting device (8) adapted to divert drifting objects away from the area between the pontoons.
Dependencies are inferred from the claim text.