Polyester mooring for the Mad Dog spar—design issues and other considerations

Petruska, David; Geyer, Jeff; Macon, Rick; Craig, Michael J.; Ran, Alex; Schulz, Neil

doi:10.1016/j.oceaneng.2004.10.002

Cited by 18 publications

(4 citation statements)

References 1 publication

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“…When BP Exploration and Production and partners in March 2004 installed a taut-leg polyester mooring system in more than 4,400 feet of water on the truss spar for Mad Dog field, on Green Canyon Block 782 in the Gulf of Mexico, it marked the first deployment of a permanent polyester mooring system on a floating production system (FPS) outside of Brazil's Campos Basin (Petruska, et. al., 2004).…”

Section: Ultra-deepwater Mooring Systemsmentioning

confidence: 99%

Enabling Ultra-Deepwater Mooring with Aramid Fiber Rope Technology

Chi

Lundhild

Veselis³

et al. 2009

All Days

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New high-strength synthetic ropes constructed of para-bonded aromatic polyamide (aramid) fiber are being developed for ultra-deepwater mooring applications. This paper highlights new laboratory tensile/fatigue testing of rope assembly, computer modeling analysis of mooring performance under operating conditions, and the potential economic impact.As the industry moves into ultra-deep water, traditional steel wire rope and chain moorings are being gradually displaced by polyester ropes. These synthetic ropes have been used in water depths between 3,000 feet and 8,000 feet. Questions arise, however, about whether polyester mooring ropes provide enough stiffness to maintain acceptable platform offsets in increasingly deeper water in all cases. Aramid fiber ropes are inherently stiffer and stronger than polyester ropes and therefore offer new solutions for ultra-deepwater mooring, as well as for other applications where production platform offsets may be critical.Advanced technologies are being developed to optimize aramid fiber performance and rope design configurations. New laboratory tensile and fatigue data are presented to demonstrate aramid fiber rope properties, performance capabilities, and minimum tension settings meeting API RP 2SM guidelines. Mooring analysis comparing the performance of an aramid mooring system with that of a polyester mooring system under simulated hurricane and loop current conditions shows significant reductions in platform offsets are achieved with the aramid system without compromising safety. This paper describes a new technology for ultra-deepwater mooring. The new approach offers the opportunity to design mooring systems for deeper water without modifying certain platform components and systems by incorporating stiffer, high-strength aramid fibers in the platform mooring system. Potential benefits include achieving optimal offsets for production risers in ultra-deep water, easier handling and installation due to smaller rope size, and greater flexibility in mooring system design. Economic analyses are presented to illustrate the advantages of the new technology as well as the financial impact.

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Section: Ultra-deepwater Mooring Systemsmentioning

confidence: 99%

Enabling Ultra-Deepwater Mooring with Aramid Fiber Rope Technology

Chi

Lundhild

Veselis³

et al. 2009

All Days

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“…Hoje, no ramo offshore, quando se trata de amarrações de estruturas, os materiais poliméricos surgem como materiais comprovadamente qualificados, em especial o poliéster, uma das mais importantes fibras poliméricas que apresenta excelentes propriedades mecânicas aliadas a um custo relativamente baixo quando comparado a outras fibras poliméricas. Uma vasta literatura da utilização de poliéster para amarrações offshore e do estudo de suas propriedades pode ser encontrada desde as primeiras proposições ainda na década de 90 até a atualidade (Del Vecchio, 1992;Petruska et al, 2005;Huang et al, 2011;Weller et al, 2015;Aqdam et al, 2018;Xu et al, 2021).…”

Section: Introductionunclassified

Avaliação de modelos de energia para simulação numérica do comportamento mecânico de multifilamentos de poliéster

Cruz

Júnior²,

Barreto³

et al. 2023

J. Eng. Exact Sci.

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Os sistemas de amarração feitos de cordas de fibra sintética e, em particular, os de poliéster, ganharam destaque nas últimas décadas. Porém o comportamento mecânico de tais fibras tem suas complexidades para simulação em virtude da viscoelasticidade e das não linearidades material e geométrica. Simulações numéricas do comportamento mecânico do material utilizado em sistema de ancoragem são realizadas com base na teoria viscoelástica e, para isso, são utilizados dados experimentais para a calibração do modelo. A abordagem matemática viscoelástica da simulação numérica depende da função energia de deformação que, para multifilamentos de materiais poliméricos, possuem características como viscoelasticidade e incompressibilidade. O objetivo desse trabalho é estudar diferentes modelos de energia de deformação aplicados à simulação numérica do poliéster, material utilizado em ancoragens offshore. Como resultados, obtém-se uma comparação quantitativa entre os modelos no que diz respeito à qualidade dos ajustes matemáticos.

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“…Nevertheless, the mechanisms proposed so far to explain the damage initiation and propagation processes in different geometry/ material mooring systems are not able to elucidate all aspects of the phenomenon (Pellegrin, 1999;Sloan, 1999;Hooker, 2000;Pearson, 2002;Petruska et al, 2005;Silva and Chimisso, 2005;Beltran and Williamson, 2005;Schmidt et al, 2006, for instance).…”

Section: Introductionmentioning

confidence: 99%

Modelling creep tests in HMPE fibres used in ultra-deep-sea mooring ropes

Mattos

Chimisso

2011

International Journal of Solids and Structures

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a b s t r a c tDue to its low density and high strength, HMPE (high modulus polyethylene) fibres are being increasingly used in synthetic ropes for offshore mooring. Nevertheless, the occurrence of creep at sea temperature can be a shortcoming for its practical use. Creep tests performed at different load levels in a sub-system of the HMPE rope (yarn) are frequently used as a first step to obtain some information about the susceptibility to creep deformation at a given temperature. The present paper is concerned with the phenomenological modelling of creep tests in HMPE yarns. In this macroscopic approach, besides the classical variables (stress, total strain), an additional scalar variable related with the damage induced by creep process is introduced. An evolution law is proposed for this damage variable. The predicted lifetimes and elongations of HMPE specimens in creep tests at different load levels and room temperature are compared with experimental results showing a good agreement.

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Polyester mooring for the Mad Dog spar—design issues and other considerations

Cited by 18 publications

References 1 publication

Enabling Ultra-Deepwater Mooring with Aramid Fiber Rope Technology

Enabling Ultra-Deepwater Mooring with Aramid Fiber Rope Technology

Avaliação de modelos de energia para simulação numérica do comportamento mecânico de multifilamentos de poliéster

Modelling creep tests in HMPE fibres used in ultra-deep-sea mooring ropes

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