“Lazy S” riser

The “lazy S” riser runs in a double catenary configuration from the FPS to the seabed over a mid-water pipe tray supported by a subsurface buoy. The subsurface buoy is kept in position by a chain or cable attached to a deadweight anchor positioned on the seabed.

Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards

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