Blar i NTNU Open på forfatter "Holta, Haavard H. F."
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A Least-Squares Scheme Utilizing Fast Propagating Shock Waves for Early Kick Estimation in Drilling
Holta, Haavard H. F.; Aamo, Ole Morten (Chapter, 2019)A scheme for fast kick estimation in managed pressure drilling is presented. The reservoir pressure and production index are estimated by utilizing information in a fast traveling shock wave induced by an unexpected rise ... -
Adaptive Control of a Linear Hyperbolic PDE with Uncertain Transport Speed and a Spatially Varying Coefficient
Anfinsen, Henrik; Holta, Haavard H. F.; Aamo, Ole Morten (Peer reviewed; Journal article, 2020)Recently, the first result on backstepping-based adaptive control of a 1-D linear hyperbolic partial differential equation (PDE) with an uncertain transport speed was presented. The system also had an uncertain, constant ... -
Adaptive Control of a Scalar 1-D Linear Hyperbolic PDE with Uncertain Transport Speed Using Boundary Sensing
Anfinsen, Henrik; Holta, Haavard H. F.; Aamo, Ole Morten (Peer reviewed; Journal article, 2020)We solve an adaptive boundary control problem for an 1-D linear hyperbolic partial differential equation (PDE) with an uncertain in-domain source parameter and uncertain transport speed using boundary sensing only. Convergence ... -
Adaptive Observer Design for an n+1 Hyperbolic PDE with Uncertainty and Sensing on Opposite Ends
Holta, Haavard H. F.; Aamo, Ole Morten (Chapter, 2020)An adaptive observer design for a system of n+1 coupled 1-D linear hyperbolic partial differential equations with an uncertain boundary condition is presented, extending previous results by removing the need for sensing ... -
Adaptive set-point regulation of linear 2x2 hyperbolic systems with application to the kick and loss problem in drilling
Holta, Haavard H. F.; Anfinsen, Henrik; Aamo, Ole Morten (Peer reviewed; Journal article, 2020)We study the kick and loss detection and attenuation problem in managed pressure drilling by modeling the well as a distributed parameter system. Two cases are considered, distinguished by whether down-hole pressure ... -
Adaptive set-point regulation of linear n+1 hyperbolic systems with uncertain affine boundary condition using collocated sensing and control
Holta, Haavard H. F.; Aamo, Ole Morten (Peer reviewed; Journal article, 2020)We solve an adaptive control problem for n + 1 hyperbolic systems using collocated sensing and control, extending recent results for adaptive control of 2×2 systems and systems with non-collocated sensing and control. The ... -
An Adaptive Observer Design for 2×2 Semi-linear Hyperbolic Systems using Distributed Sensing
Holta, Haavard H. F.; Aamo, Ole Morten (Journal article; Peer reviewed, 2019)We design an adaptive model-based observer for state and parameter estimation in 2 × 2 semi-linear hyperbolic systems with uncertain parameters where we assume that one of the two distributed states is available through ... -
Boundary Set-Point Regulation of a Linear 2×2 Hyperbolic PDE with Uncertain Bilinear Boundary Condition
Holta, Haavard H. F.; Aamo, Ole Morten (Journal article; Peer reviewed, 2018)We design an adaptive controller for a 2 × 2 linear hyperbolic PDE with uncertain boundary parameters where measurements are taken at both boundaries, while only one boundary is actuated. The uncertainty, which appears in ... -
Improved Kick and Loss Detection and Attenuation in Managed Pressure Drilling by Utilizing Wired Drill Pipe
Holta, Haavard H. F.; Anfinsen, Henrik; Aamo, Ole Morten (Journal article; Peer reviewed, 2018)A model based method for kick and loss detection and attenuation in Managed Pressure Drilling is presented. The drilling system is modeled as a distributed parameter system combined with a reservoir flow equation containing ... -
Model Based Early Kick/Loss Detection and Attenuation with Topside Sensing in MPD
Jinasena, Asanthi; Holta, Haavard H. F.; Jondahl, Morten Hansen; Welahettige, Prasanna Kumara Welahetti; Aamo, Ole Morten; Sharma, Roshan; Viumdal, Håkon; Lie, Bernt (Peer reviewed; Journal article, 2020)Early kick/loss detection is a crucial part of safe well control, and it plays a major role in the reduction of risk and non-productive time in drilling. In conventional drilling, topside sensing is used for early kick/loss ...