Optimization design on the riser system of next generation subsea production system with the assistance of DOE and surrogate model techniques

Wu, Jiahao; Zhen, Xingwei; Liu, Gang; Huang, Yi

doi:10.1016/j.apor.2019.01.035

Cited by 21 publications

(4 citation statements)

References 12 publications

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“…During the SCR parameter design, the maximum tension and operating radius curvature were constrained, 21 necessitating the determination of the critical SCR failure shape and then avoiding these shapes to select reasonable SCR shapes. Figure 9 shows the shapes of the SCR at different upper hanging angles.…”

Section: Scr Parameter Designmentioning

confidence: 99%

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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Section: Scr Parameter Designmentioning

confidence: 99%

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 subsea production system has emerged as one of the primary methods for developing oil and gas resources in deepwater regions, and is continuously advancing towards ultra-deepwater with higher production equipment demands. The subsea production system consists of essential equipment, including Christmas trees, jumpers, wellheads, pipe manifolds, and others [1]. These components are constructed onshore and installed at designated locations on the seafloor and then connected via subsea connectors to form a complete subsea production system.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior and Sealing Performance Study of Subsea Connector Core-Sealing Components under the Combined Action of Internal Pressure, Bending Moment, and Axial Load

Hao,

Yun,

Jiao

et al. 2023

JMSE

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A complete subsea production system (SPS) is assembled by interconnecting subsea manufacturing facilities through subsea connectors. To ensure the reliability and longevity of the SPS, it is imperative to thoroughly investigate the mechanical behavior and sealing performance of the subsea connector’s core-sealing components. In this study, the loading conditions of the subsea clamp connector are examined to analyze the load transfer relationship between its components under different modes. A mathematical model for the load transfer between locking torque and sealing contact pressure is developed for the preloading mode, and the concept of mechanical transfer efficiency is introduced. Another mathematical model for the load transfer between the locking torque and the design pressure is developed for the operation mode. Furthermore, a three-dimensional full-size finite element model of the subsea clamp connector is established to analyze the effects of complex loads on the mechanical behavior and sealing performance of its core-sealing components. The simulation results indicate that internal pressure loading positively affects the sealing of the subsea connector, and that the stress distribution in the core-sealing components under bending moment loading exhibits significant asymmetric characteristics. Additionally, the superposition of axial tensile loads reduces the effect of the bending moment on the strength of the core seal member but further weakens the seal. Finally, an experimental system is designed to validate the simulation results.

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“…NextGen SPS [3] is an innovative concept that can be used to implement the extraction and exporting of subsea oil. This system mainly consists of the following four parts: the IBP that is tethered perpendicularly, SWC equipment, flexible jumpers and rigid risers, as shown in Figure 1.…”

Section: Introduction 1backgroundmentioning

confidence: 99%

Numerical Investigation on Hydrodynamic Characteristics of Immersed Buoyant Platform

Yao

Zhen

Huang

et al. 2021

JMSE

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The Next Generation Subsea Production System (NextGen SPS) is considered as a competitive alternative system used for offshore petroleum production in ultra-deep sea based on the artificial seabed technology. The Immersed Buoyant Platform (IBP), which is located at a constant depth below the free surface of the water to minimize wave loading, provides a buoyant stable platform for supporting the well completion equipment. Therefore, the hydrodynamic characteristics of IBP in the currents play an essential role in determining the global responses of NextGen SPS. In this paper, aiming at acquiring an optimum structural form of IBP, the hydrodynamic characteristics of the flow past the cylindrical IBP with different height-to-diameter ratios are systematically investigated by use of the large eddy simulation (LES) approach. The simulations with fifteen different height-to-diameter ratios (H/D) are investigated. The Reynolds numbers are ranged from 0.94×106 to 3.45×106. It can be verified that the separated fluid reattaches on the surface of the cylinder when the aspect ratio is between 0.1 and 0.4. Due to the specific shape ratio and obvious 3D effect of the cylindrical IBP, no significant vortex shedding has been clearly observed when the aspect ratio is between 0.1 and 0.4. In the case of 0.4≤H/D≤5.0, a series of regular and alternating vortex street shedding appear behind the circular cylinder. The simulation results also show that the recirculation region length behind the cylindrical IBP can be significantly reduced with the decreasing aspect ratio. It can be concluded that the cylindrical IBP performs the best hydrodynamic characteristics when the aspect ratio is between 0.3 and 0.4. The research findings will be of great significance to providing valuable reference and foundation to determine the optimum form of underwater structures, such as the buoyancy cans of the hybrid riser system.

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Optimization design on the riser system of next generation subsea production system with the assistance of DOE and surrogate model techniques

Cited by 21 publications

References 12 publications

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

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

Mechanical Behavior and Sealing Performance Study of Subsea Connector Core-Sealing Components under the Combined Action of Internal Pressure, Bending Moment, and Axial Load

Numerical Investigation on Hydrodynamic Characteristics of Immersed Buoyant Platform

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