Underwater riser buoyancy

Details Underwater riser buoyancy Underwater riser buoyancy

1976-12-30

1978-07-25

Taylor, Dennis L.

61112, E21C 1900, E21B 4301

Patent

active

041021428

ABSTRACT:
Controlled buoyancy of underwater pipe installations, typically subsea risers, is achieved by securing to the pipe at least two buoyancy members each comprising a plurality of rigid hollow tubular members arranged side-by-side to form a group which is enclosed in a rigid liquid-tight shell. Advantageously, the tubular members have flat sides lying in planes which are radial with respect to the pipe when the buoyancy member is in place, and adjacent pairs of the tubular members are in flush side-wall-to-side-wall contact. Superior results are obtained when the tubular members are pultrusions of polymeric material and the shells are continuous layers of fiber-filled polymeric material.

REFERENCES:
patent: 2627302 (1953-02-01), Forsyth
patent: 2715231 (1955-08-01), Marston
patent: 3410096 (1968-11-01), Schur
patent: 3572041 (1971-03-01), Graaf
patent: 3605668 (1969-07-01), Morgan
patent: 3957112 (1976-05-01), Knibble et al.
patent: 3996757 (1976-12-01), Liddell

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