Effects of Coupled Hydrodynamic in the Performance of a DP Barge Operating Close to a FPSO

ABSTRACT In ocean systems composed by two or more closing floating bodies, coupled hydrodynamics effects must be considered. Dynamic positioned systems (DP), for example, need an accurate determination of environmental forces to guarantee a safe operation. This work presents a numerical methodology,using the WAMIT code, to evaluate both first order motions and mean drift forces […]

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Numerical and Experimental Tools for Offshore DP Operations

ABSTRACT DP crane vessel operation can be analyzed based on the uncoupled system or considering the fully coupled system. Parameters such as top-crane acceleration, thruster capability and vessel motions are evaluated for several environmental conditions. Numerical and experimental tools are used andthe important result of this analysis is the maximum condition in such that the […]

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Methodology for Evaluating DP Crane-Barge Operation in Close Proximity of a FPSO

ABSTRACT This paper presents an analysis methodology for evaluating the operation of a DP crane-barge in close proximity to a FPSO. Offshore crane operations are critical, since the barge is kept in close proximity with other vessel or platform, and large loads are transported in a pendulum configuration. A precise positioning of the crane-barge is […]

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Numerical and experimental procedure for designing sub-sea installation operations

Abstract Sub-sea equipment installations are very complex operations, requiring pre-installation analysis to define the correct procedure and the weather “window” for a safe operation. This paper addresses the installation of a Mid Water Arch (MWA) intended to provide support to the riser. Connecting the riser to the MWA largely eliminates the dynamic forces that would […]

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Conceptual Design of Monocolumn Production and Storage With Dry Tree Capability

ABSTRACT A new concept and a preliminary study for a monocolumn floating unit are introduced, aimed at exploring and producing oil in ultradeep waters. This platform, which combines two relevant features—great oil storage capacity and dry tree production capability—comprises two bodies with relatively independent heave motions between them. A parametric model is used to define […]

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Experimental Set-Up for Analysis of Subsea Equipment Installation

ABSTRACT This paper and the companion paper (Rateiro et al., 2011) present an illustrative case of the joint application of experimental tests and numerical simulations for the proper analysis of a complex offshore operation (launching of a sub-sea equipment using one or two vessels). The main idea of the whole study is to compare two […]

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