The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Y Drobyshevski - One of the best experts on this subject based on the ideXlab platform.
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integrated analysis of mooring and Riser systems for fpso s in harsh shallow water environments
ASME 2011 30th International Conference on Ocean Offshore and Arctic Engineering, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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Integrated Analysis of Mooring and Riser Systems for FPSO’s in Harsh Shallow Water Environments
Volume 4: Pipeline and Riser Technology, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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Integrated Analysis of Mooring and Riser Systems for FPSO’s in Harsh Shallow Water Environments
Volume 4: Pipeline and Riser Technology, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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integrated analysis of mooring and Riser systems for fpso s in harsh shallow water environments
ASME 2011 30th International Conference on Ocean Offshore and Arctic Engineering, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
M Martens - One of the best experts on this subject based on the ideXlab platform.
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integrated analysis of mooring and Riser systems for fpso s in harsh shallow water environments
ASME 2011 30th International Conference on Ocean Offshore and Arctic Engineering, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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Integrated Analysis of Mooring and Riser Systems for FPSO’s in Harsh Shallow Water Environments
Volume 4: Pipeline and Riser Technology, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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Integrated Analysis of Mooring and Riser Systems for FPSO’s in Harsh Shallow Water Environments
Volume 4: Pipeline and Riser Technology, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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integrated analysis of mooring and Riser systems for fpso s in harsh shallow water environments
ASME 2011 30th International Conference on Ocean Offshore and Arctic Engineering, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
F Richard - One of the best experts on this subject based on the ideXlab platform.
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ultra deep water drilling Riser Design and relative technology
Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole, 2002Co-Authors: Jean Guesnon, C Gaillard, F RichardAbstract:Ultra Deep Water Drilling Riser Design and Relative Technology — IFP has developed tools and technology to answer the waiting of contractors that wish to drill in deeper water depths, in harsher environment with higher mud weight. The methodology aims to optimise the Riser Design by proposing practical guidelines implemented by a software. To reduce unproductive time on the rig during the drilling, the Clip Riser has been developed. The main feature of the Clip Riser is the coupling which allows quick make-up of the Riser. The clip technology is a unique Design which does not require bolts, threads or any preloading in operation. To reduce drillship deckload and required tensioning capacity, the hybrid tubes have been developed to replace the existing 4"1/2 ID (114.3 mm) steel kill and choke lines by lighter tubes. The hybrid tubes are 50% lighter than equivalent all steel lines. Advantages of this technology will be presented in this paper. To improve axial behavior of the Riser and Riser architecture, hyperstatic integration of choke and kill lines have been studied. This consists in fixing the auxiliary lines at each Riser joint so that they can participate to the axial resistance of the Riser. Advantages of this system will be presented in this paper.
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Ultra Deep Water Drilling Riser Design and Relative Technology
Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, 2002Co-Authors: Jean Guesnon, C Gaillard, F RichardAbstract:IFP has developed tools and technology to answer the waiting of contractors that wish to drill in deeper water depths, in harsher environment with higher mud weight. The methodology aims to optimise the Riser Design by proposing practical guidelines implemented by a software. To reduce unproductive time on the rig during the drilling, the Clip Riser has been developed. The main feature of the Clip Riser is the coupling which allows quick make-up of the Riser. The clip technology is a unique Design which does not require bolts, threads or any preloading in operation. To reduce drillship deckload and required tensioning capacity, the hybrid tubes have been developed to replace the existing 4 1/2 ID (114. 3 mm) steel kill and choke lines by lighter tubes. The hybrid tubes are 50% lighter than equivalent all steel lines. Advantages of this technology will be presented in this paper. To improve axial behavior of the Riser and Riser architecture, hyperstatic integration of choke and kill lines have been studied. This consists in fixing the auxiliary lines at each Riser joint so that they can participate to the axial resistance of the Riser. Advantages of this system will be presented in this paper. Finally, the technological developments should answer the waiting of contractors and will further expand the range of application of standard Riser systems and make them well suited for ultra deep drilling in very harsh operational and oceanographic environments.
J R Whelan - One of the best experts on this subject based on the ideXlab platform.
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integrated analysis of mooring and Riser systems for fpso s in harsh shallow water environments
ASME 2011 30th International Conference on Ocean Offshore and Arctic Engineering, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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Integrated Analysis of Mooring and Riser Systems for FPSO’s in Harsh Shallow Water Environments
Volume 4: Pipeline and Riser Technology, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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Integrated Analysis of Mooring and Riser Systems for FPSO’s in Harsh Shallow Water Environments
Volume 4: Pipeline and Riser Technology, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
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integrated analysis of mooring and Riser systems for fpso s in harsh shallow water environments
ASME 2011 30th International Conference on Ocean Offshore and Arctic Engineering, 2011Co-Authors: M Martens, J R Whelan, Y DrobyshevskiAbstract:Shallow water mooring and Riser systems for permanently turret moored FPSOs present significant Design challenges. Many FPSOs, in particular in the South-East Asia region, are required to remain on-station in 100-year return period tropical revolving storm (typhoon) conditions. Extreme sea states combined with the restricted height of the water column generate large mooring loads and make it difficult to accommodate conventional Riser configurations. Metocean conditions in such areas can be highly directional. This directionality can be exploited by undertaking an integrated mooring and Riser Design analysis. The critical interface between the mooring and Riser systems is the turret offset and the associated turret heave. The conventional approach is to identify a single offset envelope for each Design case, comprising the mooring system (intact or damaged) and FPSO condition (loaded or ballasted), which is then used in Riser Design. This paper presents a more developed approach, the integrated approach, which is based on conducting the mooring and Riser analyses simultaneously for a common set of Design cases. To exploit the directionality of the metocean conditions, an offset envelope for each governing metocean condition is calculated from time domain mooring simulations, followed by a parameterisation scheme. As a result, multiple turret offsets and associated metocean conditions and FPSO headings are identified which form a family of offsets for each compass octant of the environment. The integrated approach is applied to an example FPSO with an external turret supporting seven Risers arranged in double wave tethered configuration. The drivers and advantages for selecting a particular Riser configuration are discussed. It is shown how application of an integrated analysis approach leads to less conservative combinations for use in the Riser Design, and enables the development of a feasible Riser system. An optimal mooring pattern, both leg make-up and orientation for Riser layout, is also developed.Copyright © 2011 by ASME
Patrick Dooley - One of the best experts on this subject based on the ideXlab platform.
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Worldwide Approximations of Current Profiles for Steel Riser Design: The WACUP Project
Volume 3: Pipeline and Riser Technology, 2012Co-Authors: Marc Prevosto, George Z. Forristall, Gus Jeans, Christelle Herry, Gavin Harte, Liam Harrington-missin, Patrick DooleyAbstract:This paper describes the objectives and methodology of the WACUP (Worldwide Approximations of Current Profiles) Joint Industry Project. The project goal is to establish best practice for reducing large current profile databases into a smaller, representative set of profiles for Riser Design. We studied the use of the following three techniques for comparing and reducing measured in-situ databases: Empirical Orthogonal Function (EOF), Self Organizing Maps (SOM) and classical Current Profile Characterisation (CPC). We evaluated the skill of these three techniques in estimating Vortex Induced Vibration (VIV) fatigue damage to a Steel Catenary Riser (SCR). Our measure of skill was the comparison of the results from the reduced data sets with results from the original complete database. The standard techniques were modified and accuracy was improved. The role of numerical current models to complement in-situ measurements in Riser Design was also assessed.Copyright © 2012 by ASME
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Worldwide Approximations of Current Profiles for Steel Riser Design: The WACUP Project
Volume 3: Pipeline and Riser Technology, 2012Co-Authors: Marc Prevosto, George Z. Forristall, Gus Jeans, Christelle Herry, Gavin Harte, Liam Harrington-missin, Patrick DooleyAbstract:This paper describes the objectives and methodology of the WACUP (Worldwide Approximations of Current Profiles) Joint Industry Project. The project goal is to establish best practice for reducing large current profile databases into a smaller, representative set of profiles for Riser Design. We studied the use of the following three techniques for comparing and reducing measured in-situ databases: Empirical Orthogonal Function (EOF), Self Organizing Maps (SOM) and classical Current Profile Characterisation (CPC). We evaluated the skill of these three techniques in estimating Vortex Induced Vibration (VIV) fatigue damage to a Steel Catenary Riser (SCR). Our measure of skill was the comparison of the results from the reduced data sets with results from the original complete database. The standard techniques were modified and accuracy was improved. The role of numerical current models to complement in-situ measurements in Riser Design was also assessed.Copyright © 2012 by ASME
