Diffusion in liners in offshore flexible pipes

  • Szabo, Peter (Project Manager)
  • Hassager, Ole (Project Participant)
  • Kristensen, Susanne Brogaard (Project Participant)
  • Marcher, Bjørn (Project Participant)
  • Nielsen, Niels Rishøj (Project Participant)

Project Details

Description

Flexible high pressure pipes are increasingly used in marine environments for the transportation of well fluids. A flexible pipe consists typically of an inner and outer polymer tube (inner lining and outer sheath), with a number of helically wound steel armour profiles in between. The purpose of the inner lining is to provide the pipe with a leak tight barrier against the transported fluids whereas the outer sheath protects the armour wires from the external environment, e.g. the sea water. A supporting metallic carcass may be applied internally in the pipe bore to increase the collapse strength of the inner lining. The objective of this project is to establish a reliable method for calculating the resulting concentrations of methane, carbon dioxide and hydrogen sulphide in the annulus of flexible high pressure pipes when
subjected to varying operational
conditions.
StatusFinished
Effective start/end date01/01/199931/12/2001