FLEXIBLE RISER PIPE INSTALLATION FOR CONVEYING HYDROCARBONS

摘要

The invention relates to a riser pipe installation that comprises a flexible duct (10) of the non-bound type, the duct (10) being vertically arranged between a mechanical connection (7', 7', 44) with a submerged buoy (8) at the stub on the one hand, and a mechanical connection (6', 6', 6'') with the seabed (5) at the bottom on the other hand, wherein fluid connections (12, 30) are provided at the stub and at the bottom for connecting the riser pipe with surface equipment (3) on the one hand and bottom equipment (2) on the other hand; the bottom of the pipe is located at a depth of at least 1000 m where it is submitted to a computable maximum reverse bottom effect F, while the buoy is oversized in order to generate at the bottom of the riser pipe a reaction tension T higher than at least 50 % or even 100 % of the computable maximum reverse bottom effect F applied at the bottom of the pipe.