“Adaptive Moving Horizon Estimator for Return Flow Rate Estimation using Fluid Levels of a Venturi Channel”
Authors: Asanthi Jinasena and Roshan Sharma,Affiliation: NTNU and University of South-Eastern Norway
Reference: 2020, Vol 41, No 2, pp. 79-90.
Keywords: adaptive estimation, flow estimation, return flow meter, friction factor, non-Newtonian, open flow, moving horizon estimator
Abstract: Real-time estimation of the return drilling fluid during oil well drilling is investigated in this study. Online fluid level measurements from a Venturi channel which can be placed on the return flowline is used with a model-based estimator. A reduced order, 1-D, mathematical equation is used for the open flow in the Venturi channel for Newtonian or non-Newtonian fluid types. The volumetric fluid flow rate is estimated using a moving horizon estimator in real-time. The friction factor is also estimated together with the fluid flow rate. The effect of the variation of the channel slope on the flow rate estimation induced by the vibration of the channel during its operation is also studied. The method requires only two level measurements in the Venturi channel together with the channel geometry. The method is validated using a laboratory scale Venturi flow system. The proposed method shows promising potential to be used as a real-time return flow rate measurement in conventional drilling systems.
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DOI: 10.4173/mic.2020.2.4References:
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BibTeX:
@article{MIC-2020-2-4,
title={{Adaptive Moving Horizon Estimator for Return Flow Rate Estimation using Fluid Levels of a Venturi Channel}},
author={Jinasena, Asanthi and Sharma, Roshan},
journal={Modeling, Identification and Control},
volume={41},
number={2},
pages={79--90},
year={2020},
doi={10.4173/mic.2020.2.4},
publisher={Norwegian Society of Automatic Control}
};