Steel Catenary Risers
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- Nom de la marqueSteel
The faster reeling installation method is very attractive to lay Steel Catenary Risers (SCR) because it minimizes the time spent by the lay vessel in the vicinity of the topsides. Technip was first to install a fully reeled SCR on the deepwater field BP Nile in 2001 (1,100m/3,600 ft water depth). Thanks to a superior welding quality, achieved at their on-shore spoolbases, Technip successfully assembled and installed many SCRs in both sweet and sour service design conditions, in the Gulf of Mexico. The track record includes the first ever pipe-in-pipe SCR (Shell Na Kika in 2004 (1,939m/6,360ft) and latterly the deepest SCR (Shell Perdido in 2009 in 2,469m/8,100ft).
An alternative to SCR is the Hybrid Catenary Riser (HCR), which combines a rigid pipe length and two flexible pipes tails, located in the most dynamic sections of the riser. Apart from the excellent dynamic behavior of HCR, the configuration also offers the advantage of a closer touchdown point to the topsides.