The motion response and hydrodynamic performance comparisons of the new subsea suspended manifold with two mooring scenarios

Wang, Yingying; Chen, Haoran; Li, Nan; An, Weizheng; Lim, Frank; Estefen, Segen F.

doi:10.1007/s40430-021-02851-7

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…Rinaldi [24] developed a modular mooring system and analyzed the dynamic response of the cable using the lumped mass method. Wang [25] proposed a new subsea suspended manifold concept and discussed its feasibility by the hydrodynamic performance state in the lumped mass method. According to the literature, as a special form of finite element method, the lumped mass method is convenient and flexible, and it is easy to add other elements to the boundary of discrete model, such as a buoy, heavy block and so on.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Response of Ocean-Towed Cable-Array System under Different Munk Moment Coefficients

2022

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The ocean towing system plays an important role in the ocean development process. The motion of a towed body is closely coupled with the motion of a towing cable. In this paper, the lumped mass method is used to discrete a towing cable into a lumped mass model. At the same time, on the basis of some assumptions, the relationship between the expression of Munk moments in the classical towed body kinematics and the expression of the Munk moments in the hydrodynamic analysis software OrcaFlex is established. Based on the above assumptions and the derivation, combined with the specific parameters of a certain sea state and a certain towing system, the dynamic simulation of the towing system is made by OrcaFlex. By changing the different Munk moment coefficients, the real-time response of the cable tension and the towed underwater body under different Munk moments is achieved. The effects of different Munk moment coefficients on the change of the tension are obtained; the six degrees of freedom of the towed body under the action of different Munk moment coefficients are shown. To obtain the spectral density of the six degrees of freedom of the towed body under the action of different Munk moment coefficients, Fast Fourier Transform is performed on the calculated results of the towed body in the time domain. The results provide a theoretical basis for the optimal design of a cable and towed body.

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Section: Introductionmentioning

confidence: 99%

Hydrodynamic Response of Ocean-Towed Cable-Array System under Different Munk Moment Coefficients

2022

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“…7 The NUPS concept is proposed to address the challenges associated with developing subsea production systems for use in ultra-deepwater, such as high integration, recyclability, and efficiency. [10][11][12] The Christmas tree function cabin (CTFC) is installed on the wellhead to exploit oil and gas resources. The subsequent multiphase fluid is transported to the SCM via the flexible jumper (SCR or NSWR) and then to the multiphase fluid separator function cabin (MFSFC).…”

Section: Introductionmentioning

confidence: 99%

“…The study presented introduces the motion response of the SCM under different influencing factors, while the tension distribution of the mooring chains and the flexible jumpers in the two mooring schemes are simulated, respectively, using OrcaFlex software. 11 The global parametric sensitivity analysis and NSWR parameter design of the SCM is conducted. 12 However, the SCM suffers interference from many factors, including fluid density, and currents, necessitating the examination of the SCM stability in the presence of these extreme conditions.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of the mooring capacity comparison of the subsea suspended manifold with two mooring schemes

Zhao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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The next-generation underwater production system (NUPS) is based on the suspension cluster manifold (SCM) as a new conceptual scheme. SCM mooring stability is essential for establishing NUPS. Therefore, comparing the SCM mooring stability in different mooring systems is vital for evaluating system adaptability. This paper detailed two mooring schemes designed for the SCM, including the steel catenary riser (SCR) mooring system and the new steep wave (NSWR) mooring system. OrcaFlex software was used to establish the mooring system model, analyzing the static motion response of the SCM under the current and fluid density. Furthermore, the mooring system adaptability in the cluster wellhead layout was also evaluated and compared. The results showed that the maximum offset of the SCM with the SCR mooring system was within 2 m under the current, while the deflection of the SCM with the NSWR mooring system was within 1.5° in extreme fluid densities. Furthermore, the SCM with the SCR mooring system displayed superior station-keeping capability in the current, while the NSWR mooring system exhibited better stability when transporting extreme fluid densities and was more adaptable in cluster wellhead layouts.

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Dynamic Analysis of A Subsea Suspended Manifold Going Through Splash Zone During Installation

Wang

Liu²,

Yang

et al. 2022

China Ocean Eng

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The subsea suspended manifold designed to replace the traditional foundation structure with the buoys is a new generation subsea production system that can be suspended at a certain height from the seafloor and rapidly recycled by its own buoyancy. Due to complex environmental conditions, its hydrodynamic performance in the splash zone is extremely important for the safety of the whole installation process. In this paper, the mathematical model for the dynamic analysis of the seawater ingress process of the single-layer pre-set horizontal cabin is proposed based on the different center of gravity positions of the buoy. Meanwhile, the theoretical analysis of fiber cable is divided into infinite differential units by the discretization method, and the formulae of the horizontal displacement of the subsea suspended manifold are presented. In addition, the simulations are carried out to verify the rules of the dynamic responses on the subsea suspended manifold system with the consideration of the environmental conditions in the South China Sea. Comparing with the calculated value of the mathematical model of the cabin water ingress, the error of the simulation result by use of FLUENT is about 5.47%. Furthermore, the wave height is greater than the current impact on the lowering manifold system and the azimuth angle of the installation vessel is aligned with the direction of the environmental load.

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The motion response and hydrodynamic performance comparisons of the new subsea suspended manifold with two mooring scenarios

Cited by 5 publications

References 34 publications

Hydrodynamic Response of Ocean-Towed Cable-Array System under Different Munk Moment Coefficients

Hydrodynamic Response of Ocean-Towed Cable-Array System under Different Munk Moment Coefficients

Numerical simulation of the mooring capacity comparison of the subsea suspended manifold with two mooring schemes

Dynamic Analysis of A Subsea Suspended Manifold Going Through Splash Zone During Installation

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