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A Complete Failure of a Floatover Installation With Strand Jack Lifting Scheme and a Great Success of Float-On and Float-Off Rescue Operation

[+] Author Affiliations
Alan M. Wang, Tao Wang, Youcheng Li, Changsheng Yu, Fuwen Tao, Chen He

Offshore Oil Engineering Co., Tianjin, China

Paper No. OMAE2014-24117, pp. V01BT01A014; 13 pages
doi:10.1115/OMAE2014-24117
From:
  • ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1B: Offshore Technology
  • San Francisco, California, USA, June 8–13, 2014
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4538-7
  • Copyright © 2014 by ASME

abstract

An innovative and complicated strand jack lifting technology was applied to floatover installation of DPP integrated topsides in South China Sea. Due to initial failure to lower the four outer support legs, an unfortunate chain of events occurred thereafter, thus yielding a complete failure of the floatover installation never happened in history. A rescue operation was carried out in the two following days to successfully salvage both the topsides and the floatover barge stranded inside the jacket slot in extraneous circumstances. This paper presents the floatover systems and the failure events of the innovative low-deck floatover technology, as well as the successful rescue operations by floating on and floating off the topsides onto the eight-legged jacket. Big lessons learned are also addressed here.

Copyright © 2014 by ASME

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