Bottom tensioned offshore oil well production riser

Wells – Submerged well – Means removably connected to permanent well structure

Reexamination Certificate

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Details

C166S352000, C405S224400

Reexamination Certificate

active

07063158

ABSTRACT:
An offshore oil well riser system comprises one or more tubular conduits suspended from a floating platform and having bottom ends extending downward substantially vertically toward the sea floor. A bottom end connection and tensioning assembly is disposed at the bottom ends of the conduits and comprises a jumper for connecting the bottom end of each conduit to an associated sub-sea oil well, a weight for applying a vertical tension in the conduits, and an apparatus for constraining the bottom end of the conduits against horizontal movement, while enabling them to move freely in a vertical direction and to pivot freely at their bottom ends in response to motions of the platform on the water surface. The riser system is useful with a wide variety of floating platforms, and can be employed in either dry tree or wet tree completion systems.

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Remery, J. & Coutarel, A.: “The Hybrid Catenary Riser: A New and Optimised Riser Configuration for Ultra Deep Water” Dot, Nov. 2000.

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