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Prognostics and Health Management of Choke Valves Subject to Erosion: A Diagnostic-Prognostic Frame for Optimal Maintenance Scheduling
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Author(s): Giulio Gola (Institute for Energy Technology, & IO-center for Integrated Operations, Norway)and Bent H. Nystad (Institute for Energy Technology, & IO-center for Integrated Operations, Norway)
Copyright: 2013
Pages: 19
Source title:
Diagnostics and Prognostics of Engineering Systems: Methods and Techniques
Source Author(s)/Editor(s): Seifedine Kadry (American University of the Middle East, Kuwait)
DOI: 10.4018/978-1-4666-2095-7.ch016
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Abstract
Oil and gas industries are constantly aiming at improving the efficiency of their operations. In this respect, focus is on the development of technology, methods, and work processes related to equipment condition and performance monitoring in order to achieve the highest standards in terms of safety and productivity. To this aim, a key issue is represented by maintenance optimization of critical structures, systems, and components. A way towards this goal is offered by Condition-Based Maintenance (CBM) strategies. CBM aims at regulating maintenance scheduling based on data analyses and system condition monitoring and bears the potential advantage of obtaining relevant cost savings and improved operational safety and availability. A critical aspect of CBM is its integration with condition monitoring technologies for handling a wide range of information sources and eventually making optimal decisions on when and what to repair. In this chapter, a CBM case study concerning choke valves utilized in Norwegian offshore oil and gas platforms is proposed and investigated. The objective is to define a procedure for optimizing maintenance of choke valves by on-line monitoring their condition and determining their Remaining Useful Life (RUL). Choke valves undergo erosion caused by sand grains transported by the oil-water-gas mixture extracted from the well. Erosion is a critical problem which can affect the correct valve functioning, resulting in revenue losses and cause environmental hazards.
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