Subsea umbilical

摘要

An umbilical for use in the offshore production of hydrocarbons, the umbilical comprising a plurality of functional elements contained within an outer sheath, at least one of said functional elements comprising a multicore electric cable, said multicore electric cable comprising a plurality of insulated electric conductors electrically insulated from each other and assembled together in a helical or S/Z manner, said multicore electric cable further comprising a protective polymer sheath surrounding said plurality of insulated electric conductors, said multicore electric cable further comprising a tubular metallic layer located inside said protective polymer sheath and surrounding said plurality of insulated electric conductors.

主权项

1. A subsea umbilical configured for use in offshore production of hydrocarbons, the umbilical comprising:
an outer sheath; a plurality of functional elements contained within the outer sheath, said functional elements comprising a multicore electric cable and a hose that transports fluid; said multicore electric cable comprising: a plurality of insulated electric conductors electrically insulated from each other and assembled together in a helical or S/Z manner, a protective polymer sheath surrounding said plurality of insulated electric conductors, and a tubular metallic layer located inside said protective polymer sheath and surrounding said plurality of insulated electric conductors, said tubular metallic layer being a barrier against diffusion of hydrogen from an outside to an inside of said multicore electric cable, wherein the tubular metallic layer is made of a metal strip helically wrapped with overlap around the plurality of insulated electric conductors, and wherein the hose is positioned outside the protective polymer sheath.