The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Jayantha P. Liyanage - One of the best experts on this subject based on the ideXlab platform.
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Safety Integrity Under Demanding Conditions: A Study on Permit-to-Work (PTW) Systems in the Marine-Subsea Sector
Proceedings of the 10th World Congress on Engineering Asset Management (WCEAM 2015), 2016Co-Authors: Shambhu Jayakumar, Jayantha P. LiyanageAbstract:During last few years the oil and gas industry has seen a major evolution of innovative Subsea solutions and technological leap leading to novel complex applications such as the ‘Subsea factory’. Taking this into perspective, the marine Subsea industry has become one of the most developing sectors involving many stakeholders with a wide range of background to perform various operations. These operations bring together marine operators, ship owners, Subsea Asset owners/Asset operators, Subsea equipment manufacturers, various subcontractors, ship yards, etc., to work together under demanding conditions. Due to high-risk nature of oil and gas business, such operations constitute various critical features requiring specific measures to reduce unwanted events and risk exposure. The permit to work (PTW) system is such a critical measure, which is an integral part of a safe working structure that can help to manage the wide range of activities taking place simultaneously. Risk assessment and risk mitigation, which are core elements for the PTW system, are key contributors for safe execution of jobs. A comprehensive PTW system should not only determine how the work can be carried out safely but also should envisage human factors involved in operations. In addition to generic features that are relevant to normal PTW systems, there are specific needs to account for the nuances of the marine Subsea industry. This is to increase the safety as well as efficiency of operations especially under demanding conditions in terms of time, cost, and safety. Years of experiences have begun to question if PTW systems should be applied to all activities since current practices have a considerable potential to lead to many confusions among stakeholders weakening the overall effectiveness. This would require a closer analysis of the current PTW systems and practices to ensure safety integrity as well as to establish an effective work interface between stakeholders.
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Subsea Asset maintenance on the ncs on the trends future innovation and fitness of life of field
2015Co-Authors: Agus Darmawan, Jayantha P. LiyanageAbstract:This paper studies the future Subsea Asset maintenance on the Norwegian Continental Shelf and evaluates the fitness of life-of-field. The future Subsea Asset maintenance is studied by analysing 15 Subsea Asset installation projects awarded on the Norwegian Continental Shelf in the last 10 years. The data were gathered from various reliable sources, including “FACTS 2013—The Norwegian Petroleum Sector” published by the Ministry of Petroleum and Energy and the Norwegian Petroleum Directorate. The sources also include websites of oil and gas companies and Subsea contractors, and related publications. Life-of-field refers to services offered by Subsea contractors to oil and gas companies once a field has started its production. This paper uses Subsea 7’s installations as a case study. The fitness of life-of-field was assessed by comparison to future Subsea Asset maintenance on the Norwegian Continental Shelf. The success criteria and the fitness of life-of-field services can be used by oil and gas companies and Subsea contractors to better enable Subsea Asset maintenance to perform its role effectively in oil and gas field development.
Stephen Lyon - One of the best experts on this subject based on the ideXlab platform.
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riser and Subsea Asset field life extension
2015Co-Authors: Dhawal Nashikkar, Weihua Mo, Vamsee Achanta, Stephen LyonAbstract:Many offshore floating hosts and Subsea Assets commissioned in the Gulf of Mexico are approaching the end of their design life. Existing fields continue to produce due to enhanced recovery while adjacent fields are considered to be tied back into aging facilities. Hence, there is motivation to extend the service life of these Subsea Assets beyond the original design life. Condition assessment and life extension analysis for the Assets is required to ensure safe operations during extended field life. This paper discusses the general roadmap and activities performed to provide assurance that extended operational life of riser and Subsea Assets will not create integrity risks. Life extension of a typical riser system on a production platform is discussed as a case study. The case study is mainly focused on riser but can be generalized to Subsea Assets. The paper reviews the original designs of the Assets in conjunction with the extended service requirements. Inspection and operational information from ongoing integrity management of these Assets is utilized to understand the health of the existing Asset. Use of actual history of loading to understand the fatigue history of the structures is discussed. The paper also includes evaluation of the impact that updated metocean and the latest code requirements have on robust extension of the Asset field lives.
David Maclean - One of the best experts on this subject based on the ideXlab platform.
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Subsea Asset protection from falling objects using multi layered shielding a preliminary study
ASME 2017 36th International Conference on Ocean Offshore and Arctic Engineering (OMAE 2017), 2017Co-Authors: Cheslav Balash, Guy Maclean, David MacleanAbstract:Protection solutions for pipelines, umbilicals, and cables from accidentally dropped objects are generally implemented with concrete mattresses, though concrete does not effectively dissipate shock loading. The presented work investigated relative absorption properties of two materials (concrete and polystyrene), singly and in combination, with an aim to ultimately advance the protection of Subsea Assets from falling objects. A series of experiments were undertaken to measure the impact force from dropped objects of varied mass and height on single and stacked plates of varied thickness. It was concluded that the combination of absorptive and non-absorptive materials could be beneficial; specifically, a protection shield for a Subsea Asset could comprise concrete at the base, polystyrene through the middle, and a thin shell layer of concrete on the outer surface. The proposed next phase will seek the combination of concrete strength and polystyrene compression to provide optimum levels of absorption.
Chris Staveley - One of the best experts on this subject based on the ideXlab platform.
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get smart go optical example uses of optical fibre sensing technology for production optimisation and Subsea Asset monitoring
Proceedings of SPIE, 2014Co-Authors: Chris StaveleyAbstract:With the growth in deep-water oil and gas production, condition monitoring of high-value Subsea Assets to give early warning of developing problems is vital. Offshore operators can then transport and deploy spare parts before a failure occurs, so minimizing equipment down-time, and the significant costs associated with unscheduled maintenance. Results are presented from a suite of tests in which multiple elements of a Subsea twin-screw pump and associated electric motor were monitored using a fibre optic sensing system based on fibre Bragg gratings (FBG) that simultaneously measured dynamic strain on the main rotor bearings, pressure and temperature of the lubricating oil, distributed temperature through the motor stator windings and vibration of the pump and motor housings.
Dhawal Nashikkar - One of the best experts on this subject based on the ideXlab platform.
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riser and Subsea Asset field life extension
2015Co-Authors: Dhawal Nashikkar, Weihua Mo, Vamsee Achanta, Stephen LyonAbstract:Many offshore floating hosts and Subsea Assets commissioned in the Gulf of Mexico are approaching the end of their design life. Existing fields continue to produce due to enhanced recovery while adjacent fields are considered to be tied back into aging facilities. Hence, there is motivation to extend the service life of these Subsea Assets beyond the original design life. Condition assessment and life extension analysis for the Assets is required to ensure safe operations during extended field life. This paper discusses the general roadmap and activities performed to provide assurance that extended operational life of riser and Subsea Assets will not create integrity risks. Life extension of a typical riser system on a production platform is discussed as a case study. The case study is mainly focused on riser but can be generalized to Subsea Assets. The paper reviews the original designs of the Assets in conjunction with the extended service requirements. Inspection and operational information from ongoing integrity management of these Assets is utilized to understand the health of the existing Asset. Use of actual history of loading to understand the fatigue history of the structures is discussed. The paper also includes evaluation of the impact that updated metocean and the latest code requirements have on robust extension of the Asset field lives.
