Device for lightening an undersea production riser by means of f

Details Device for lightening an undersea production riser by means of f Device for lightening an undersea production riser by means of f

1984-09-14

1986-06-24

Basinger, Sherman D.

Buoys, rafts, and aquatic devices

Buoyancy providing attachment for pipe, log, or line

166350, B63B 2200

Patent

active

045965315

ABSTRACT:
A device is provided for lightening an undersea production riser having a central tube surrounded by peripheral stringers. Foamed resin collars are stacked on the central tube. They have a central opening for passing the central tube therethrough and channels disposed concentrically for passing the peripheral lines therethrough. The wall of the central channel is lined with a reinforced material and it has a conical shape for fitting the part of the lining projecting from the end of the collar into the central channel of the adjacent collar. Centering of the collars is provided by two half shells made from metal sheet bearing on the central tube and on the wall of the central channel.

REFERENCES:
patent: 3705432 (1972-12-01), Watkins
patent: 3729756 (1973-05-01), Cook et al.
patent: 3768842 (1973-10-01), Ahlstone
patent: 3793657 (1974-02-01), Kaas
patent: 4176986 (1979-12-01), Taft et al.
patent: 4332509 (1982-06-01), Reynard et al.
patent: 4351257 (1982-09-01), Brown
patent: 4388025 (1983-06-01), Evans
patent: 4470722 (1984-09-01), Gregory

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