Ulf Jakob Flø Aarsnes

Ulf Jakob Flø Aarsnes

Seniorforsker
Telefon: +47 51 87 56 71
Epost: ulaa@norceresearch.no
Kontoradresse: Tullins gate 2, 0166 Oslo, Norway

Prosjekter

NOV i Open Lab
Prosjekt

DigiWells: Digitalt brønnsenter for verdiskaping, konkurranseevne og minimalt miljøavtrykk

Publikasjoner

A phenomenological transient model of bit foundering
Journal of Petroleum Science and Engineering 2020
Robust control design of underactuated 2× 2 PDE-ODE-PDE systems
IEEE Control Systems Letters 2020
Closed-loop tool face control with the bit off-bottom
Journal of Process Control 2020
Robust output feedback stabilization of an ODE–PDE–ODE interconnection
Automatica 2020
Axial and torsional self-excited vibrations of a distributed drill-string
Journal of Sound and Vibration 2019
Delay robust control design of under-actuated PDE-ODE-PDE systems
American Control Conference (ACC) 2019
Effect of shock subs on self-excited vibrations in drilling systems
Journal of Petroleum Science and Engineering 2019
Extremum seeking for real-time optimal drilling control
American Control Conference (ACC) 2019
Estimating friction factors while drilling
Journal of Petroleum Science and Engineering 2019
Benchmarking of Industrial Stick-Slip Mitigation Controllers
IFAC-PapersOnLine 2018
Delay-Robust Control Design for Two Heterodirectional Linear Coupled Hyperbolic PDEs
IEEE Transactions on Automatic Control 2018
Effects of latency, motor inertia and filtering on stick-slip mitigation control
2018
ADVANCES IN CONTROL OF HYPERBOLIC PARTIAL DIFFERENTIAL EQUATIONS: OPPORTUNITIES FOR DRILLING
2018
Stick-slip and torsional friction factors in inclined wellbores
MATEC Web of Conferences 2018
Robust output regulation of 2x 2 hyperbolic systems: Control law and Input-to-State Stability
American Control Conference (ACC) 2018
Avoiding stick slip vibrations in drilling through startup trajectory design
Journal of Process Control 2018
Flow and pressure control of underbalanced drilling operations using NMPC
Journal of Process Control 2018
Transient modeling of one-dimensional solid-liquid flow in conduits
International Journal of Multiphase Flow 2018
Dynamics of a distributed drill string system: Characteristic parameters and stability maps
Journal of Sound and Vibration 2018
Torsional vibrations with bit off bottom: Modeling, characterization and field data validation
Journal of Petroleum Science and Engineering 2018
State and Parameter Estimation of a Drift-Flux Model for Underbalanced Drilling Operations
IEEE Transactions on Control Systems Technology 2017
Review of two-phase flow models for control and estimation
Annual Reviews in Control 2016
Robust controller design for automated kick handling in managed pressure drilling
Journal of Process Control 2016
Real-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
A simplified two-phase flow model using a quasi-equilibrium momentum balance
International Journal of Multiphase Flow 2016
Linear stability analysis of self-excited vibrations in drilling using an infinite dimensional model
Journal of Sound and Vibration 2016
A methodology for classifying operating regimes in underbalanced-drilling operations
SPE Journal 2016
Estimation of states and parameters of a drift-flux model with unscented kalman filter
IFAC-PapersOnLine 2015
A distributed parameter systems view of control problems in drilling
IFAC-PapersOnLine 2015
Fit-for-Purpose Modeling for Automation of Underbalanced Drilling Operations
2014
CONTROL-ORIENTED DRIFT-FLUX MODELING OF SINGLE AND TWO-PHASE FLOW FOR DRILLING
2014
Modeling and avoidance of heave-induced resonances in offshore drilling
SPE Drilling & Completion 2014
An adaptive observer for hyperbolic systems with application to UnderBalanced Drilling
Elsevier IFAC Publications / IFAC Proceedings series 2014
Limits of Controller Performance in the Heave Disturbance Attenuation Problem
2013
Quantifying Error Introduced by Finite Order Discretization of a Hydraulic Well Model
2012
Modeling for MPD operations with experimental validation
2009