Ulf Jakob Flø Aarsnes
Seniorforsker
ulaa@norceresearch.no
+47 51 87 56 71
Tullins gate 2, 0166 Oslo, Norway
Prosjekter
Publikasjoner
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Vitenskapelig artikkelEvaluation of distributed damping subs with active control for stick–slip reduction in drilling– Geoenergy Science and Engineering 2023
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Vitenskapelig artikkelBoundary Control and Estimation for Under-Balanced Drilling with Uncertain Reservoir Parameters– IEEE Transactions on Control Systems Technology 2023
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Vitenskapelig kapittelModeling and Analysis of Non-Rotating Damping Subs for Removing Torsional Vibrations in Drilling– 2022
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KonferanseforedragModeling and Analysis of Non-Rotating Damping Subs for Removing Torsional Vibrations in Drilling– ASME 41st International Conference on Ocean, Offshore and Arctic Engineering 2022
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Vitenskapelig artikkelSelf-Tuning Torsional Drilling Model for Real-Time Applications– American Control Conference (ACC) 2020
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Vitenskapelig artikkelA phenomenological transient model of bit foundering– Journal of Petroleum Science and Engineering 2020
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KonferanseforedragSelf-tuning torsional drilling model for real-time applications– 2020 American Control Conference (ACC) 2020
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Vitenskapelig artikkelRobust control design of underactuated 2× 2 PDE-ODE-PDE systems– IEEE Control Systems Letters 2020
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Vitenskapelig artikkelClosed-loop tool face control with the bit off-bottom– Journal of Process Control 2020
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Vitenskapelig artikkelRobust output feedback stabilization of an ODE–PDE–ODE interconnection– Automatica 2020
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Vitenskapelig artikkelAxial and torsional self-excited vibrations of a distributed drill-string– Journal of Sound and Vibration 2019
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KonferanseforedragCreating Open Source Models, Test Cases, and Data for Oilfield Drilling Challenges– SPE/IADC International Drilling Conference and Exhibition, 5-7 March, The Hague, The Netherlands 2019
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Vitenskapelig artikkelDelay robust control design of under-actuated PDE-ODE-PDE systems– American Control Conference (ACC) 2019
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Vitenskapelig artikkelEffect of shock subs on self-excited vibrations in drilling systems– Journal of Petroleum Science and Engineering 2019
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Vitenskapelig artikkelExtremum seeking for real-time optimal drilling control– American Control Conference (ACC) 2019
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Vitenskapelig artikkelEstimating friction factors while drilling– Journal of Petroleum Science and Engineering 2019
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Vitenskapelig artikkelBenchmarking of Industrial Stick-Slip Mitigation Controllers– IFAC-PapersOnLine 2018
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Vitenskapelig artikkelDelay-Robust Control Design for Two Heterodirectional Linear Coupled Hyperbolic PDEs– IEEE Transactions on Automatic Control 2018
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Faglig kapittelEffects of latency, motor inertia and filtering on stick-slip mitigation control– 2018
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Faglig kapittelADVANCES IN CONTROL OF HYPERBOLIC PARTIAL DIFFERENTIAL EQUATIONS: OPPORTUNITIES FOR DRILLING– 2018
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Vitenskapelig artikkelStick-slip and torsional friction factors in inclined wellbores– MATEC Web of Conferences 2018
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Vitenskapelig artikkelRobust output regulation of 2x 2 hyperbolic systems: Control law and Input-to-State Stability– American Control Conference (ACC) 2018
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Vitenskapelig artikkelAvoiding stick slip vibrations in drilling through startup trajectory design– Journal of Process Control 2018
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Vitenskapelig artikkelFlow and pressure control of underbalanced drilling operations using NMPC– Journal of Process Control 2018
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Vitenskapelig artikkelTransient modeling of one-dimensional solid-liquid flow in conduits– International Journal of Multiphase Flow 2018
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Vitenskapelig artikkelDynamics of a distributed drill string system: Characteristic parameters and stability maps– Journal of Sound and Vibration 2018
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Vitenskapelig artikkelTorsional vibrations with bit off bottom: Modeling, characterization and field data validation– Journal of Petroleum Science and Engineering 2018
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KonferanseforedragAxial and torsional dynamics of a distributed drill string system– 9th European Nonlinear Dynamics Conference 2017
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KonferanseforedragStick-slip and torsional friction factors in inclined wellbores– International Conference on Engineering Vibration 2017
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Vitenskapelig artikkelState and Parameter Estimation of a Drift-Flux Model for Underbalanced Drilling Operations– IEEE Transactions on Control Systems Technology 2017
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KonferanseforedragMathematical Modeling of Gas in Riser– SPE Deepwater Drilling and Completions Conference 2016
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Vitenskapelig oversiktsartikkelReview of two-phase flow models for control and estimation– Annual Reviews in Control 2016
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Vitenskapelig artikkelRobust controller design for automated kick handling in managed pressure drilling– Journal of Process Control 2016
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Vitenskapelig artikkelReal-time estimation of reservoir influx rate and pore pressure using a simplified transient two-phase flow model– Journal of Natural Gas Science and Engineering 2016
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Vitenskapelig artikkelA simplified two-phase flow model using a quasi-equilibrium momentum balance– International Journal of Multiphase Flow 2016
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Vitenskapelig artikkelLinear stability analysis of self-excited vibrations in drilling using an infinite dimensional model– Journal of Sound and Vibration 2016
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Vitenskapelig artikkelA methodology for classifying operating regimes in underbalanced-drilling operations– SPE Journal 2016
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KonferanseforedragA Simplified Gas-Liquid Flow Model for Kick Mitigation and Control During Drilling Operations– ASME 2015 Dynamic Systems and Control Conference 2015
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KonferanseforedragA Simplified Transient Multi-Phase Model for Automated Well Control Applications– International Petroleum Technology Conference 2015
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Vitenskapelig artikkelEstimation of states and parameters of a drift-flux model with unscented kalman filter– IFAC-PapersOnLine 2015
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KonferanseforedragA Methodology for classifying operating regimes in UBO– SPE Managed Pressure Drilling and Well Control Workshop 2015
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Vitenskapelig artikkelA distributed parameter systems view of control problems in drilling– IFAC-PapersOnLine 2015
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KonferanseforedragEstimation of States and Parameters of Drift-Flux Model with Unscented Kalman Filter– 2nd IFAC Workshop on Automatic Control in Offshore Oil and Gas Production 2015
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Vitenskapelig kapittelFit-for-Purpose Modeling for Automation of Underbalanced Drilling Operations– 2014
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Vitenskapelig kapittelCONTROL-ORIENTED DRIFT-FLUX MODELING OF SINGLE AND TWO-PHASE FLOW FOR DRILLING– 2014
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Vitenskapelig artikkelModeling and avoidance of heave-induced resonances in offshore drilling– SPE Drilling & Completion 2014
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Vitenskapelig artikkelAn adaptive observer for hyperbolic systems with application to UnderBalanced Drilling– Elsevier IFAC Publications / IFAC Proceedings series 2014
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KonferanseforedragCONTROL-ORIENTED DRIFT-FLUX MODELING OF SINGLE AND TWO-PHASE FLOW FOR DRILLING– ASME 2014 Dynamic Systems and Control Conference 2014
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KonferanseforedragAn adaptive observer for hyperbolic systems with application to UnderBalanced Drilling– Proceeding of the 2014 IFAC World Congress 2014
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KonferanseforedragFit-for-Purpose Modeling for Automation of Underbalanced Drilling Operations– SPE/IADC Managed Pressure Drilling & Underbalanced Operations Conference & Exhibition 2014
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KonferanseforedragRejection of heave-induced pressure oscillations in Managed Pressure Drilling– International Colloquium on Nonlinear Dynamics and Control of Deep Drilling Systems 2014
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Vitenskapelig kapittelLimits of Controller Performance in the Heave Disturbance Attenuation Problem– 2013
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KonferanseforedragLimits of Controller Performance in the Heave Disturbance Attenuation Problem– European Control Conference 2013
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KonferanseforedragModeling for MPD operations with experimental validation– IADC/SPE Drilling Conference and Exhibition 2012
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Vitenskapelig kapittelQuantifying Error Introduced by Finite Order Discretization of a Hydraulic Well Model– 2012
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KonferanseforedragQuantifying Error Introduced by Finite Order Discretization of a Hydraulic Well Model– 2012 Australian Control Conference 2012
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Vitenskapelig kapittelModeling for MPD operations with experimental validation– 2009
