From measurement collection to remaining useful life estimation: defining a diagnostic-prognostic frame for optimal maintenance scheduling of choke valves undergoing erosion



Giulio Gola Bent Helge Nystad


Condition Based Maintenance (CBM) aims at regulating maintenance scheduling based on data analyses and system condition monitoring. Clear advantages of optimizing maintenance scheduling include relevant cost savings and improved safety and plant availability. A critical aspect is the integration of CBM strategies 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 work, a practical case study concerning maintenance of choke valves in offshore oil platforms has been investigated. Choke valves used in offshore oil platforms undergo erosion caused by the sand grains transported by the oil-water-gas mixture extracted from the well. Erosion is a critical problem which can affect the correct functioning of the valves, result in revenue losses and cause environmental hazards. In this respect, this work proposes a diagnostic-prognostic scheme for assessing the actual health state of a choke valve and eventually estimating its Remaining Useful Life (RUL). In particular, the focus has been on the identification of those parameters which contribute to the actual erosion of the choke valve, the development of a model-based approach for calculating a reliable indicator of the choke valve health state, the actual estimation of the choke RUL based on that indicator using statistical approaches and, finally, the investigation of methods to reduce the uncertainty of the RUL estimation by adding highly meaningful knowledge on the erosion state of the choke valve

How to Cite

Gola, G. ., & Helge Nystad, B. . (2011). From measurement collection to remaining useful life estimation: defining a diagnostic-prognostic frame for optimal maintenance scheduling of choke valves undergoing erosion. Annual Conference of the PHM Society, 3(1).
Abstract 158 | PDF Downloads 124



Condition Based Maintenance, Choke valves, Erosion, Data quality, Prognostics, Remaining useful life

(Andrews et al., 2005) J. Andrews, H. Kjørholt, and H. Jøranson, Production Enhancement from Sand Management Philosophy: a Case Study from Statfjord and Gullfaks, SPE European Formation Damage Conference, Sheveningen, The Netherlands, 2005.

(Bringedal et al., 2010) B. Bringedal, K. Hovda, P. Ujang, H.M. With, and G. Kjørrefjord, Using Online Dynamic Virtual Flow Metering and Sand Erosion Monitoring for Integrity Management and Production Optimization, Deep Offshore Technology Conference, Houston, Texas, US, 2010.

(Gola and Nystad, 2011) G. Gola, B.H. Nystad. Comparison of Time- and State-Space Non-Stationary Gamma Processes for Estimating the Remaining Useful Life of Choke Valves undergoing Erosion. Proceedings of COMADEM, Stavanger, Norway, 2011.

(Haugen et al., 1995) K. Haugen, O. Kvernvold, A. Ronold, and R. Sandberg. Sand Erosion of Wear Resistant Materials: Erosion in Choke Valves. Wear 186-187, pp. 179-188, 1995.

(Hovda and Andrews, 2007) K. Hovda and J.S. Andrews, Using Cv Models to Detect Choke Erosion - a Case study on Choke Erosion at Statfjord C-39, SPE Applied Technonogy Workshop on Sound Control, Phuket, Thailand, 2007.

(Hovda and Lejon, 2010) K. Hovda and K. Lejon, Effective Sand Erosion Management in Chokes and Pipelines the Case studies from Statoil, 4th European Sand management Forum, Aberdeen, Scotland, UK, 2010.

(Jarrel et al., 2004) D.B Jarrell, D.R Sisk. and L.J. Bond, Prognostics and Condition-Based Maintenance: A New Approach to Precursive Metrics, Nuclear Technology,
145, pp. 275-286, 2004

(Kiddy, 2003) J.S. Kiddy, Remaining Useful Life Prediction based on Known Usage Data. Proceedings of SPIE, 5046(11), 2003.

(Metso Automation, 2005) Metso Automation. Flow Control Manual. Metso Automation, 4th edition 2005.

(Ngkleberg, and Sontvedt, 1995) L. Ngkleberg, T. Sontvedt. Erosion in Choke Valves - Oil and Gas Industry Applications. Wear, 186-187, Part 2, pp. 401-412 1995.

(Nystad et al., 2010) B.H. Nystad, G. Gola, J.E. Hulsund, and D. Roverso. Technical Condition Assessment and Remaining Useful Life Estimation of Choke Valves subject to Erosion. Proceedings of the Annual Conference of the Prognostics and Health Management Society, Portland, Oregon, US, 2010. (PCT/NO2008/00293, 2008) PCT/NO2008/00293, System
and Method for Empirical Ensemble-based Virtual Sensing.

(van Noortwijk and Pandey, 2003) J.M. van Noortwijk and M.D. Pandey. A Stochastic Deterioration Process for Time-dependent Reliability Analysis, in Proceeding of IFIP WG 7.5 Working Conference on Reliability and Optimization of Structural Systems, Banff, Canada, 2003.
Wallace et al., 2004) M.S. Wallace, W.M. Dempster, T. Scanlon, J. Peters, and S. McCulloch. Prediction of Impact Erosion in Valve Geometries. Wear 256, pp. 927-936, 2004.
Technical Research Papers