Resilience of HP/HT pipelines to combined seismic and thermal loadings

Mina, Daniele; Karampour, Hassan; Forcellini, Davide

doi:10.1016/j.oceaneng.2023.114098

Cited by 9 publications

(3 citation statements)

References 62 publications

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“…Consequently, the vulnerability and resilience of subsea pipelines to the various factors affecting their integrity and operability are receiving increased attention and attracting significant research focus [1,2]. Subsea pipeline resilience can be defined as the pipeline's capacity to withstand manmade and natural hazards, and this resilience plays a significant role in the design process [3]. These hazards could include accidental pulling with fishing gear, damages caused by terrorist activity, earthquakes, extreme climate and environmental conditions and unforeseen installation or operational loads [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

The Optimization of a Subsea Pipeline Installation Configuration Using a Genetic Algorithm

Karabaić,

Kršulja,

Maričić

et al. 2024

JMSE

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The most commonly used subsea pipeline installation method is the S-Lay method. A very important and complex task in an S-Lay installation engineering analysis is to find the optimal pipelay vessel installation configuration for every distinctive pipeline route section. Installation loads in the pipeline are very sensitive to small changes in the configuration of the pipeline supports during laying and other influential parameters, such as the tensioner force, stinger angle, trim and draft of the pipelay vessel. Therefore, the process of an engineering installation analysis is very demanding, and there is a need for an automated optimization process. For that purpose, installation engineering methodology criteria and requirements are formalized into a nonlinear optimization problem with mixed continuous and discrete variables. A special tailored multi-objective genetic algorithm is developed that can be adjusted to any desired combination of criteria and offshore standards’ requirements. The optimization algorithm is applied to the representative test cases. The optimization procedure efficiency and quality of the achieved solution prove that the developed genetic algorithm operators and the whole optimization approach are adequate for the presented application.

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Section: Introductionmentioning

confidence: 99%

The Optimization of a Subsea Pipeline Installation Configuration Using a Genetic Algorithm

Karabaić,

Kršulja,

Maričić

et al. 2024

JMSE

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“…[2][3][4]. Working environments can be under high pressure up to hundreds of atmospheres and at temperatures from close to absolute zero to thousands of degrees [5,6]. Fittings include a number of mechanisms mounted in collectors that regulate certain work flows [7].…”

Section: Introductionmentioning

confidence: 99%

Operation Simulation for a Check Valve Used in High-Performance Systems

Soboleva,

Kerimov,

Anudinov

et al. 2023

Civ Eng J

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This research aims to increase the reliability and safety of pipeline systems by creating an improved model range of Butterfly Check Valves (BCV). Pipes through which working fluids are transported, parts related to shut-off and control valves, control measuring instruments, fasteners, anticorrosion elements, and other structural components are the main elements that make up pipelines. Fittings can be of different types; BCV refers to protective ones. These devices protect pipelines by disconnecting the working line in the event of a sudden change in the transported fluid parameters (pressure, flow direction), resulting in the failure of the entire system. Based on an analysis of the key requirements for valves, namely reliability, tightness of a closed system, ensuring safe operation, and analysis of existing BCVs, the design of the presented valve was created. Improved overall dimensions and tightness, both in the open and closed states, as opposed to the existing analogs, are distinctive features of the developed design of butterfly check valves. To confirm the results, the authors, using the finite element method, calculated the stress–strain state of the structure under normal conditions and with regard to the maximum temperatures of the working fluid. The reliability indicators of the developed elements were also calculated to confirm their operability. As a result, it was concluded that after the developed valves have passed acceptance tests, the research findings will make it possible to increase the reliability and safety of the valve itself and the entire pipeline system by introducing these structures into enterprises. Doi: 10.28991/CEJ-2023-09-12-017 Full Text: PDF

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“…Argyroudis et al [32] proposed a novel framework for the quantitative resilience assessment of critical infrastructure. Mina et al [33] studied the resilience of unburied high-pressure/high-temperature pipelines with different outside diameter-to-wall thickness ratios and subjected to the action of thermal loads. Ouyang et al [34] proposed a novel resilience-assessment method of interdependent infrastructure systems.…”

Section: Introductionmentioning

confidence: 99%

Influence of Auxiliary Pipelines of the Deepwater Drilling Riser on the Dynamic Characteristics of the Subsea Wellhead

Wang,

Gao

et al. 2023

JMSE

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During deepwater drilling, the subsea wellhead will be subjected to dynamic loads transmitted from the marine environment, floating drilling platform, riser, and blowout preventer (BOP). Therefore, complex dynamic responses will be induced, which will seriously affect the safety of the subsea wellhead. In this paper, considering the effect of auxiliary pipelines on the riser, a novel entire mechanical model of the floating platform–riser–BOP–subsea wellhead is established. By using the finite-difference method, the governing equations are solved. Finally, the dynamic bending moment and stress distribution of the subsea wellhead are obtained. Moreover, the model is verified by numerical simulation in Orcaflex. On this basis, the influence of the wave height, wave period, sludge height of the subsea wellhead, rotational stiffness of the lower flexible joint, and wall thickness of the conductor on the dynamic characteristics of the subsea wellhead is discussed. Analysis results show that the theoretical analysis results are in good agreement with the numerical simulation. The auxiliary pipelines have important influence on the dynamic characteristics of the subsea wellhead. Wave period is the most important factor affecting the mechanical behavior of the subsea wellhead. Wave height, wall thickness of the conductor, and sludge height are secondary factors affecting the mechanical behavior of the subsea wellhead. The rotational stiffness of the lower flexible joint has little influence on the mechanical behavior of the subsea wellhead. By solving the optimized mechanical model proposed in this paper, the dynamic characteristic of the subsea wellhead conforms more to the actual deepwater drilling conditions. This study has reference significance for the design and mechanical control of the subsea wellhead in deepwater drilling.

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Resilience of HP/HT pipelines to combined seismic and thermal loadings

Cited by 9 publications

References 62 publications

The Optimization of a Subsea Pipeline Installation Configuration Using a Genetic Algorithm

The Optimization of a Subsea Pipeline Installation Configuration Using a Genetic Algorithm

Operation Simulation for a Check Valve Used in High-Performance Systems

Influence of Auxiliary Pipelines of the Deepwater Drilling Riser on the Dynamic Characteristics of the Subsea Wellhead

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