Numerical Modelling Of Disconnectable Turret
Mooring Systems
Author(s)
A. Duggal, S. Ryu & O. De Andrade
Abstract
Floating, Production, Storage, and Offloading systems (FPSOs) have become a
popular option for operators in almost all areas of oil and gas production around
the world. The FPSO as a concept is the only production platform that has
virtually no water depth limitations. When fitted with a disconnectable turret
mooring (DTM) system, FPSOs can be used in areas where it is desirable to
remove the production unit from the field temporarily to prevent exposure to
extreme events such as hurricanes or large icebergs. This paper provides an
overview of the key issues involved in the numerical analysis of a DTM for deep
water. The paper focuses on the hydrodynamic loading and the global analysis of
the FPSO system and the response of the various components during
disconnection and reconnection of the system. The paper also makes direct
comparison between the numerical analysis and the data obtained from model
tests of the system with an emphasis on the impact of deep water on the analysis
and design of such systems.
Keywords: fluid-structure interaction, FPSO, disconnectable turret mooring,
floating platform.
1 Introduction
Disconnectable FPSOs have been employed by the offshore industry since the
late 1980s in regions like the South China Sea and off North Western Australia
that experience severe cyclones or typhoons. These early systems were typically
small production and storage facilities in shallow water, but over the years have
demonstrated the safety and effectiveness of such systems to disconnect and
avoid cyclones. The JHN Lufeng FSO installed in 1993 in the South China Sea
Keywords
fluid-structure interaction, FPSO, disconnectable turret mooring,
floating platform.
Related Book
Other papers in this volume
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