Floating offshore structure
Patent 4519728 Issued on May 28, 1985. Estimated Expiration Date: 
March 24, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 24, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3279404 3605415 3766874 3774562 3886882 Arctic caisson Method and apparatus for protecting offshore structures against forces from moving ice sheets Connecting assembly and method Arctic barge drilling unit Patent #: 4434741 InventorsAssigneeApplicationNo. 06/478327 filed on 03/24/1983US Classes:405/224, With anchoring of structure to marine floor114/265, Multiple leg114/40, ICE BREAKERS405/195.1, MARINE STRUCTURE OR FABRICATION THEREOF405/217In or on frozen mediaExaminersPrimary: Taylor, Dennis L.Attorney, Agent or FirmInternational ClassesB63B 21/50 (20060101)B63B 35/44 (20060101) B63B 21/00 (20060101) Foreign Application Priority Data1982-04-16 JPAbstractA floating offshore structure which is moored at a fixed position on the sea by means of mooring hawsers and anchors connected to the ends thereof respectively for conducting a submarine excavating operation from a deck of the structure. The structure includes a moorage hull part provided with a vertical through-hole formed therein for receiving an excavating drill pipe and the mooring hawsers and a movable hull part connected to the moorage hull part so as to be rotatable within a horizontal plane. The movable hull part is constituted as a hull defining the outer wall of the floating offshore structure and connected with the moorage hull part by inserting it into a moorage hull part receiving hole formed at a position closer to the bow thereof. The movable hull part has near its water plane a horizontal section with a substantially oval shape formed by a fore draft part in a substantially circular or polygonal shape, with the moorage hull part receiving hole as a center and an after draft part taperingly projecting aft from the fore draft part. | |
