B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
61/9
B63B 35/44 (2006.01) B63B 35/08 (2006.01) E21B 7/00 (2006.01) E21B 7/128 (2006.01)
Patent
CA 1092377
ABSTRACT OF THE DISCLOSURE A skirt system has been provided for use with novel means for providing a substantially ice-free zone around a vessel out to at least 100 feet from the vessel. One such novel means includes: (a) a plurality of floating modules disposed around, and connected at one end to, the vessel; (b) a continuous, downwardly depending skirt extending completely around the outer periphery of the plurality of floating modules; and (c) an air/water heat exchanger in a selected plurality of such floating modules. The skirt system includes (a) a base; (b) a first flexible external skirt depending from the base, the first skirt being provided with a metallic lip depending below the lower edge to depend into the water; (c) a second flexible internal skirt depending from the base adjacent the first skirt, spaced interiorly from and substantially parallel to the first skirt, the second skirt being slightly shorter than the first skirt to stop short of the water; (d) a conduit leading from a source of hot air to said skirts; and (e) a compartment connected to said conduit and providing a hot air passage between the space between said first skirt and said parallel second skirt. The combination of the skirt with the above-described system provides a seal between the water/ice interface which will substantially prevent cold air from going under the canopy, and yet is sufficient to allow some ice encroachment within the ice-free zone around the vessel, which encroached ice soon is melted to maintain the ice-free zone, so that no substantial forces are put on the vessel.
305628
Bercha Frank G.
O'rourke Cameron
Pilkington G. Roger
Dome Petroleum Limited
Wotherspoon S. F. M.
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