Model Tests of a Riser Armour for Subsea Offshore Loading of Hydrocarbons: Part I. Response to Ice Impacts

An offshore loading system for hydrocarbons was designed for ice-infested waters. The flexible riser linking the tanker to a sub-sea bottom installation is protected in a steel armour made of conical elements. The riser is then protected against ice blocks that may travel under the tanker keel when breaking pressure ridges. A model of the armour was built and mounted under a moored tanker in a flume in the Harbour Laboratory at the Norwegian University of Science and Technology (NTNU), Trondheim. Impacts from big single ice floes were then simulated. A maximal horizontal full-scale deflection of 2.2 m was observed, horizontal forces at the extremities of the armour culminated at 370 kN. These tests indicate an effective way of protecting the riser. The considered design seems to be a safe solution to loading in the arctic offshore.

• Record URL:
  http://www.poac.com/Papers/POAC03_V1.zip
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9788274820623
• Supplemental Notes:
  • Abstract reprinted with permission of the International Conference on Port and Ocean Engineering Under Arctic Conditions (POAC).
• Corporate Authors:

  Port and Ocean Engineering under Arctic Conditions (POAC)

  ,    
• Authors:
  • Bonnemaire, B
  • Løset, S
• Conference:
  • 17th International Conference on Port and Ocean Engineering under Arctic Conditions (POAC'03)
  • Location: Trondheim , Norway
  • Date: 2003-6-16 to 2003-6-19
• Publication Date: 2003

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 10p
• Monograph Title: POAC '03: Proceedings of the 17th International Conference on Port and Ocean Engineering under Arctic Conditions
• Serial:
  • Proceedings of the International Conference on Port and Ocean Engineering Under Arctic Conditions
  • Publisher: Port and Ocean Engineering under Arctic Conditions (POAC)
  • ISSN: 0376-6756
  • EISSN: 2077-7841
  • Serial URL: http://www.poac.com/PapersOnline.html

Subject/Index Terms

• TRT Terms: Deflection; Hydrocarbons; Ice floes; Loading and unloading; Ocean bottom; Riser pipe; Sea ice; Tankers
• Geographic Terms: Arctic Regions
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Pipelines; Planning and Forecasting; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 01583615
• Record Type: Publication
• ISBN: 9788274820623
• Files: TRIS
• Created Date: Dec 23 2015 8:11AM