Ships – Building – Canal and ferry boats
Patent
1974-08-21
1976-08-03
Shapiro, Jacob
Ships
Building
Canal and ferry boats
114 61, 114 5R, 114 5T, B63B 3504, F16L 100
Patent
active
RE0289221
ABSTRACT:
The stinger includes a base structure having a plurality of upstanding stabilizing columns on opposite sides of its pitch and roll axes and carrying pipeline supports which permit translational movement of the pipeline relative to the stinger. The stinger is pivotably secured behind the pipelaying barge and is ballasted from a low draft condition with the base structure having freeboard to a high draft condition. The pipeline supports progressively decrease in height above the base structure from the end of the segment nearest the barge whereat the pipeline is supported in the air toward the opposite end whereat the aft pipeline support disposes the pipeline below the mean waterline. The pipeline centerline extending along the supports defines a radius of curvature at least equal to and preferably much greater than the minimum allowable radius of curvature for the pipeline. The stinger is preferably configured such that the combined natural frequency of the stinger and pipeline match as nearly as possible the natural frequency of the pipelaying barge.
REFERENCES:
patent: 2375286 (1945-05-01), Creed
patent: 2525955 (1950-10-01), Scott
patent: 3321925 (1967-05-01), Shaw
patent: 3407610 (1968-10-01), Wolff
patent: 3411306 (1968-11-01), Mosby
patent: 3440826 (1969-04-01), Cline
patent: 3462263 (1969-08-01), Moore
Santa Fe International Corporation
Shapiro Jacob
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