Stress relieving joint for riser

Details Stress relieving joint for riser Stress relieving joint for riser

1997-08-21

1999-02-23

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

285216, 405202, 405224, E21B 712, E21B 1700

Patent

active

058736778

ABSTRACT:
A stress relieving joint for use with riser pipe in floating systems wherein a vessel is subject to variable motion caused by wind, currents, and wave action. The riser pipe has one end connectable to the sea floor and an upper portion adapted to pass through a constraining opening at the bottom of the vessel. A ball joint and socket assembly is removably attached to the keel at the constraint opening. A sleeve is attached at substantially its midpoint in the ball joint. Riser pipe received in the sleeve is provided with wear strips that reduces the rate of reduction in wear surface diameter.

REFERENCES:
patent: 2514504 (1950-07-01), Moline
patent: 2537183 (1951-01-01), Bloomer
patent: 2717792 (1955-09-01), Pelley
patent: 3548079 (1970-12-01), Jones et al.
patent: 4212561 (1980-07-01), Wipkink
patent: 4363567 (1982-12-01), Van Der Graaf
patent: 4378179 (1983-03-01), Hasle
patent: 4633801 (1987-01-01), Marshall

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