Stress relieving joint for riser
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United States of America Patent
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-
Feb 23, 1999
Grant Date -
N/A
app pub date -
Aug 21, 1997
filing date -
Aug 21, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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