B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
114/46.7
B63B 21/10 (2006.01) B63B 21/66 (2006.01) E02F 3/90 (2006.01) E21B 17/01 (2006.01) E21B 43/013 (2006.01)
Patent
CA 1059841
FAIRING FOR PIPES Abstract of the Disclosure: A fairing for pipes or other substantially rigid structures is disclosed, where the pipe may be immersed in a fluid medium, usually fresh water or sea water. The fairing is formed as a shell having a nose portion in which the pipe -- or a pipe bundle -- is accommodated and a tail portion; and at least the tail portion of the fairing has a plurality of upstanding ribs which extend at least from the forward portion of the tail to the rear portion thereof. The cross-sections taken through the upstanding ribs are different in absolute terms than the cross-sections taken through the alternating tail portions between the ribs; but the aspect ratios of length to breadth of each of the cross-sections are similar. A pair of stabilizer plates may be secured across the outer surfaces of the upstanding rib portions near the rearward ends thereof; and apertures may be formed in trailing fin portions which extend rearwardly from behind the alternating tail portions, with at least a portion of each of the apertures being between the stabilizer plates. In general, the aspect ratios through the tail portion and the rib portion, respectively, of a fairing such as may be used on riser pipes for such as an offshore well may be approximately 2:1 and 2.1:1.
263003
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