An analytical study and systematic monitoring procedure developed for the load-out operation of the North Rankin Jacket 'A'
The loadout of the 22,000 tonnes North Rankin Jacket 'A' onto a floating barge was successfully accomplished in April, 1982. During the loadout the barge ballast was continually adjusted to compensate for both jacket weight transfer onto the barge and full tide variation. The preparation for the loadout and the operation itself was characterized by newly developed integrated techniques. The techniques included: the development of a barge, jacket and quayside three-dimensional computer model to check the validity of conventional and simple ballast system software. The model was also used to evaluate the control parameters of the operation in a series of analyses which determine the sensitivity of critical steps of the operation to human or equipment errors: the development and operation of an integrated control system for jacket load transfer that relates jacket position to barge level and ballast pump requirements; the development and operation of a tide-expectation computer programme and associated ballast pump time scheduling software to compensate for differences between actual water level and that determined from standard tide tables, and to minimize the effect of short-term, local tide variations that are not forecast; and the incorporation of fail-safe concepts and measures into the operation.
- Research Organization:
- Woodside Offshore Pty. Ltd.
- OSTI ID:
- 5302660
- Report Number(s):
- CONF-830514-
- Journal Information:
- Offshore Technol. Conf.; (United States), Vol. 2; Conference: Offshore technology conference, Houston, TX, USA, 2 May 1983
- Country of Publication:
- United States
- Language:
- English
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