Definition(s)
Multibore flexible-pipe riser
A multibore flexible-pipe riser may consist only of flexible production, injection and/or service lines, or it may also incorporate one or more multicore control umbilicals or IPUs, in order to reduce the number of risers between the seabed equipment and the FPS.
Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards