Subsea pipeline shroud

Details Subsea pipeline shroud Subsea pipeline shroud

1993-11-19

1996-08-27

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Structure protection

138103, 405169, 405170, E02D 560, E02D 3100

Patent

active

055494170

ABSTRACT:
Vortex-induced vibrations of unsupported segments of subsea pipelines are reduced by providing a shroud that can be lowered onto the subsea pipeline wherein the shroud creates turbulence that interferes with vortex shedding and thereby reduces the amplitude of vibrations are reduced. The preferred shroud comprises a plurality of rods supported in vertical planes along the sides of the pipeline. Installation can be performed without the use of divers.

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M. M. Zdravkovich, "Review and Classification of Various Aerodynamic and Hydrodynamic Means for Suppressing Vortex Shedding," Journal of Wind Engineering and Industrial Aerodynamics, 7 (1981) 145-189.
M. J. Every et al., "Vortex-Excited Vibrations of Cylinders and Cables and Their Suppression," Ocean Engng., 9, No. 2, (1982) 135-157.
A. R. Packwood, "Performance of Segmented Swept and Unswept Cable Fairings at Low Reynolds Numbers," Ocean Engng. 17, No. 4, (1990).

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