A NOVEL DESIGN PROCEDURE FOR JACKET INSTALLATIONS

In the summer of 1994 the jacket and topsides for Total Oil Marine's Dunbar field in the UK sector of the North Sea were successfully installed by a heavy lift barge. The installation of the jacket was challenging since the lift was utilizing the full crane capacity and also due to the soil conditions at the location, which made the docking procedure critical to achieve the required installation tolerances for tie-back of the pre-drilled wells. The SSCV assisted installation procedure was carefully designed and analyzed by numerical calculations supplemented and supported by extensive model testing. This paper addresses the model test methodology with emphasis on the innovative procedures for testing and analysing random, non-linear phenomena: impact loads during jacket lift-off from the barge and between jacket and piles during docking. The test programme and the analysis demonstrated the importance of providing not just a single value but a sample of extreme values for a proper assessment of design loads that are generated by non- linear random processes. Whereas the results from the tests are specific for the jacket structure, the methodology is of general use for the industry.

  • Supplemental Notes:
    • OMAE 1995, 14th Intl Conf on Offshore Mechanics & Arctic Engng; 18-22 June 1995; Copenhagen, Denmark. Sponsored by ASME et al. Procs. Publ by ASME, ISBN 0-7918-1307-X. Vol I, Pt B, p 19 [9 p, 7 ref, 3 tab, 6 fig]
  • Authors:
    • Christiansen, P E
    • Sterndorff, M J
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00718448
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 27 1996 12:00AM