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Analysis and Contro...
Analysis and Control of Stick-Slip Oscillations in Drilling Systems
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- Besselink, Bart (författare)
- KTH,Reglerteknik,ACCESS Linnaeus Centre
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Vromen, Thijs (författare)
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Kremers, Niek (författare)
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van de Wouw, Nathan (författare)
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(creator_code:org_t)
- IEEE, 2016
- 2016
- Engelska.
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Ingår i: IEEE Transactions on Control Systems Technology. - : IEEE. - 1063-6536 .- 1558-0865. ; 24:5, s. 1582-1593
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This paper proposes feedback control strategies for the mitigation of torsional stick-slip oscillations in drilling systems using drag bits. Herein, we employ a model for the coupled axial-torsional drill-string dynamics in combination with a rate-independent bit-rock interaction law including both cutting and frictional effects. Using a singular perturbation and averaging approach, we show that the dynamics of this model generate an apparent velocity-weakening effect in the torque-on-bit, explaining the onset of torsional stick-slip vibrations. Based on this dynamic analysis, the (decoupled) torsional dynamics can be described by a delay-differential equation with a state-dependent delay. Using this model, we propose both state-and output-feedback control strategies for the mitigation of torsional stick-slip oscillations, where the latter strategy uses surface measurements only. The effectiveness of the proposed approaches is shown in a simulation study.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)
Nyckelord
- Control of drilling systems
- delay-differential equations (DDEs)
- linearization of DDEs
- stick-slip oscillations
- time scale analysis and averaging
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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