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dc.contributor.authorAlbert, Anders
dc.contributor.authorAamo, Ole Morten
dc.contributor.authorGodhavn, John-Morten
dc.contributor.authorPavlov, Alexey
dc.date.accessioned2016-06-23T10:15:56Z
dc.date.accessioned2016-07-06T10:16:36Z
dc.date.available2016-06-23T10:15:56Z
dc.date.available2016-07-06T10:16:36Z
dc.date.issued2015
dc.identifier.citationIEEE Transactions on Control Systems Technology 2015, 23(2):813-819nb_NO
dc.identifier.issn1063-6536
dc.identifier.urihttp://hdl.handle.net/11250/2395804
dc.description- Author's preprintnb_NO
dc.description.abstractAs oil exploration and development costs rise, the oil industry increases its efforts to improve oil recovery (IOR) from existing fields. IOR is achieved mainly by drilling more wells, but drilling in partially depleted reservoirs is challenging due to narrow pressure margins. Offshore drilling in harsh environments, such as the North Sea, presents additional challenges, since the heaving motion from a floating rig induces large surge and swab pressures in the well. This brief suggests a remedy for this problem using automatic control of well pressure. Taking advantage of an experimental lab facility recently completed at NTNU, a model of the drilling system is developed using subspace identification methods. The model serves as a basis for state estimation and controller design using model predictive control. Applying the controller to the lab facility, pressure oscillations are suppressed by 70%-90% compared with the open-loop case, depending on the period of the heave motion.nb_NO
dc.language.isoengnb_NO
dc.publisherIEEEnb_NO
dc.titleSuppressing Pressure Oscillations in Offshore Drilling: Control Design and Experimental Resultsnb_NO
dc.typeConference objectnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.date.updated2016-06-23T10:15:56Z
dc.source.pagenumber813-819nb_NO
dc.identifier.doi10.1109/TCST.2014.2332541
dc.identifier.cristin1186413
dc.relation.projectNorges forskningsråd: 223254nb_NO
dc.description.localcodePersonal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works nb_NOnb_NO


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