Analysis and Control of Oilwell Drilling Vibrations: A Time-Delay Systems Approach by Martha Belem Saldivar MárqueAnalysis and Control of Oilwell Drilling Vibrations: A Time-Delay Systems Approach by Martha Belem Saldivar Márque

Analysis and Control of Oilwell Drilling Vibrations: A Time-Delay Systems Approach

byMartha Belem Saldivar Márque, Islam Boussaada, Hugues Mounier

Hardcover | March 26, 2015

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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 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.

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. Is...
Title:Analysis and Control of Oilwell Drilling Vibrations: A Time-Delay Systems ApproachFormat:HardcoverDimensions:282 pagesPublished:March 26, 2015Publisher:Springer-Verlag/Sci-Tech/TradeLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:3319157469

ISBN - 13:9783319157467

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Table of Contents

Introduction.- Part I Modelling.- An Overview of Drillstring Models.- Bit-Rock Frictional Interface.- Comprehensive Modelling of a Vertical Oilwell Drilling System.- Part II Analysis.- Neural-Type Time-Delay Systems: Theoretical Background.- Bifurcation Analysis of the Drilling System.- Ultimate Boundedness and Analysis.- Part III Control.- Field Observations and Empirical Drilling Control.- Low-Order Controllers.- Flatness-Based Control of Drilling Vibrations.- Stick-Slip Control: Lyapunov-Based Approach.- Practical Stabilization of the Drilling System.- Performance Analysis of the Controllers.- Appendices: Short Summary of Classical Local Bifurcations.- Lyapunov Stability Theory.- Drilling Model Parameters.- Pontryagin Stability Conditions.