Analysis and Control of Oilwell Drilling Vibrations - Saldivar Márquez, Martha Belem;Boussaada, Islam;Mounier, Hugues
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This book reports the results of exhaustive research work on modeling and control of vertical oil well drilling systems. It is focused on the analysis of the system-dynamic response and the elimination of the most damaging drill string vibration modes affecting overall perforation performance: stick-slip (torsional vibration) and bit-bounce (axial vibration). The text is organized in three parts.
The first part, Modeling, presents lumped- and distributed-parameter models that allow the dynamic behavior of the drill string to be characterized; a comprehensive mathematical model taking into…mehr

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Produktbeschreibung
This book reports the results of exhaustive research work on modeling and control of vertical oil well drilling systems. It is focused on the analysis of the system-dynamic response and the elimination of the most damaging drill string vibration modes affecting overall perforation performance: stick-slip (torsional vibration) and bit-bounce (axial vibration). The text is organized in three parts.

The first part, Modeling, presents lumped- and distributed-parameter models that allow the dynamic behavior of the drill string to be characterized; a comprehensive mathematical model taking into account mechanical and electric components of the overall drilling system is also provided. The distributed nature of the system is accommodated by considering a system of wave equations subject to nonlinear boundary conditions; this model is transformed into a pair of neutral-type time-delay equations which can overcome the complexity involved in the analysis and simulation of the partial differential equation model.

The second part, Analysis, is devoted to the study of the response of the system described by the time-delay model; important properties useful for analyzing system stability are investigated and frequency- and time-domain techniques are reviewed.

Part III, Control, concerns the design of stabilizing control laws aimed at eliminating undesirable drilling vibrations; diverse control techniques based on infinite--dimensional system representations are designed and evaluated. The control proposals are shown to be effective in suppressing stick-slip and bit-bounce so that a considerable improvement of the overall drilling performance can be achieved.

This self-contained book provides operational guidelines to avoid drilling vibrations. Furthermore, since the modeling and control techniques presented here can be generalized to treat diverse engineering problems, it constitutes a useful resource to researchers working on control and its engineering application in oil well drilling.
Autorenporträt
Belem Saldivar has a B.S. degree in electronics and telecommunications engineering; she has also a M.Sc. degree in Automatic Control and a conjoint Ph.D. degree in Automatic Control and in Informatics and Applications. Her research is focused on the analysis, modeling and control of finite and infinite-dimensional dynamical systems. Islam Bousaada has the B.S., M.Sc. and Ph.D. degrees in Mathematics. His research is focused on qualitative theory of differential equations and its applications, normal forms, nonlinear analysis and formal calculus. Hugues Mounier has the B.S. degree in computer science, M.Sc. and Ph.D. degrees in automatic control. His research interests include differentially flat systems, infinite dimensional systems (delay- and PDE-based), model free control, real time systems and their applications to the design of engineering systems. Silviu-Iulian Niculescu has the B.S., M.Sc. and Ph.D. degrees in Automatic Control. His research interests include delay systems, robust control, operator theory and numerical methods in optimization and their applications to the design of engineering systems.