Composite enhanced metallic drilling riser system

Details Composite enhanced metallic drilling riser system Composite enhanced metallic drilling riser system

2011-06-21

2011-06-21

Dang, Hoang (Department: 3672)

Wells

Submerged well

Riser

C405S195100

Reexamination Certificate

active

07963337

ABSTRACT:
An offshore composite enhanced metallic drilling riser is equipped to enable preloading of the composite shell and the metallic riser. A riser has steel end connectors and a continuous metallic inner liner, encased in a composite shell. A segmented hyperboloid shaped profile is located near each of the end fittings for preloading of the composite and the metallic riser. In one version, both halves of the hyperboloid shape are capable of axial movement by adjusting jack bolts connected to one of the hyperboloid halves. One of the halves is limited in axial movement while the other half moves axially away from the restricted half, the movement simultaneously generates the composite pre-load and the metallic riser pre-load. The other version uses fluid pressure between mating faces of the segments to push them apart.

REFERENCES:
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patent: 5771975 (1998-06-01), Anderson et al.
patent: 5813467 (1998-09-01), Anderson et al.
patent: 2001/0045286 (2001-11-01), Pallini et al.

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