Lifting Device Having Hinged Segments
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United States of America Patent
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N/A
Issued Date -
Oct 31, 2013
app pub date -
Apr 24, 2013
filing date -
Apr 25, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Lifting devices for use with drilling risers, where the lifting devices have a plurality of segments, some of which are hinged to facilitate handling and provide multiple shear points between the hinged segments. One embodiment comprises a lifting device for a drilling riser, where the device includes a collar and a lifting lug. The collar has a cylindrical ring with one or more annular ribs connected to corresponding circular edges of the ring. The lifting lug is connected to the collar and the ribs. The collar has a plurality of segments, and at least a first one of the segments is pivotally connected to another one of the segments by a hinge. Each rib may taper smoothly from a smaller thickness at a top edge of the rib to a greater thickness at a base of the rib.
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