Floating offshore structure

Details Floating offshore structure Floating offshore structure

B - Operations, Transporting

63

B

114/58.5

B63B 21/50 (2006.01)

Patent

CA 1227379

ABSTRACT OF THE DISCLOSURE: A floating offshore structure for mooring at a fixed position on the sea by means of a mooring hawser having an anchor connected at the end thereof, for conducting a sub- marine excavating operation by an excavating drill pipe. The structure comprises a hull; a vertical through-hole formed in said hull; and means for preventing floating objects such as broken ice from entering the vertical through-hole, comprising a tubular body projecting downwardly from a bottom of the hull substantially coaxial with the vertical through- hole such that the mooring hawser and the excavating drill pipe can be extended through the vertical through-hole and tubular body to the sea bottom. The tubular body in an operative position projects below the hull bottom a sufficient distance to prevent the floating objects from entering the vertical through hole, but without reaching the sea bottom. Means are provided for suppressing oscillation of the floating offshore structure, comprising an overhanging member projecting radially outwardly from an outer periphery of a lower end of said tubular body.

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