Robust regulation of heave-induced pressure oscillations in offshore MPD

Hessam Mahdianfar, Naira Hovakimyan, Alexey Pavlov, Ole Morten Aamo

Research output: Contribution to journalConference article

Abstract

This paper presents a modification to L1 adaptive control that allows for disturbances entering at the output and application of this control strategy to Managed Pressure Drilling with harmonic disturbances representing the heave motion of a floating drilling rig. By incorporating the disturbance at the output into the reference model, it is shown that the L1 adaptive control structure can be left unchanged while the original transient performance bounds are preserved. It is further shown that rejection of the output disturbance can be taken care of entirely in the filter design step of L1 adaptive control using the internal model principle. A systematic filter design procedure based on LMIs is provided, that requires only one tuning parameter to be adjusted by the designer. The control design is applied to disturbance attenuation and set-point tracking in the so-called heave problem in oil well drilling. We present experimental results of control system tests in a medium size test facility emulating a 900m long well.

Original languageEnglish (US)
Pages (from-to)112-119
Number of pages8
JournalIFAC-PapersOnLine
Volume28
Issue number6
DOIs
StatePublished - Jul 1 2015
Event2nd IFAC Workshop on Automatic Control in Offshore Oil and Gas Production, OOGP 2015 - Florianopolis, Brazil
Duration: May 27 2015May 29 2015

Keywords

  • Active heave compensation
  • Drilling and well technology
  • Managed pressure drilling (MPD)
  • Robust output regulation

ASJC Scopus subject areas

  • Control and Systems Engineering

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