The use of fibre optic sensing technology for integrity monitoring of flexible risers has been demonstrated. A technique for integration of the sensors along the tensile armouring has been developed and used in testing of a full-scale riser where the strain in the tensile armour was measured. The integration technique is also applicable to fibre optic sensors for other measurands. The test riser was exposed to a fatigue test of 612 000 bending cycles. The strain measurements provided new and important data about the conditions in the annulus of a riser during operation. The small diameter of optical fibres (OD = 0.125mm) and the multiplexing features of sensors based on fibre Bragg gratings (FBG) make it possible to realise various sensing systems in the riser annulus. A possible combination of different fibre optic sensors is outlined.
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ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
June 23–28, 2002
Oslo, Norway
Conference Sponsors:
- Ocean, Offshore, and Arctic Engineering Division
ISBN:
0-7918-3613-4
PROCEEDINGS PAPER
Integrity Monitoring of Flexible Risers by Optical Fibres Available to Purchase
Niels Jo̸rgen Risho̸j-Nielsen
Niels Jo̸rgen Risho̸j-Nielsen
NKT Flexibles, Bro̸ndby, Denmark
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Arne Berg
OPTOPLAN, Trondheim, Norway
Niels Jo̸rgen Risho̸j-Nielsen
NKT Flexibles, Bro̸ndby, Denmark
Paper No:
OMAE2002-28088, pp. 47-52; 6 pages
Published Online:
February 24, 2009
Citation
Berg, A, & Risho̸j-Nielsen, NJ. "Integrity Monitoring of Flexible Risers by Optical Fibres." Proceedings of the ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 3. Oslo, Norway. June 23–28, 2002. pp. 47-52. ASME. https://doi.org/10.1115/OMAE2002-28088
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