Browsing NTNU Open by Author "Nygaard, Olav Gerhard Haukenes"

Now showing items 1-2 of 2

A novel model-based scheme for kick and loss mitigation during drilling

Hauge, Espen; Aamo, Ole Morten; Godhavn, John-Morten; Nygaard, Olav Gerhard Haukenes (Journal article; Peer reviewed, 2013)

A model-based in-/out-flux detection scheme for managed pressure drilling is presented. We apply a globally exponentially stable adaptive observer which estimates the unknown states and parameters of the hydraulic system ...
Multivariable process control in high temperature and high pressure environment using non-intrusive multi sensor data fusion

Nygaard, Olav Gerhard Haukenes (Doktoravhandlinger ved NTNU, 1503-8181; 2006:38, Doctoral thesis, 2006)

The main objective of this thesis is to use available knowledge about a process and combine this with measurement data from the same process to extract more information about the process. The combination of knowledge and ...