By Martha Belem Saldivar Márquez,Islam Boussaada,Hugues Mounier,Silviu-Iulian Niculescu
This e-book experiences the result of exhaustive examine paintings on modeling and regulate of vertical oil good drilling platforms. it really is all in favour of the research of the system-dynamic reaction and the removal of the main harmful drill string vibration modes affecting total perforation functionality: stick-slip (torsional vibration) and bit-bounce (axial vibration). The textual content is prepared in 3 parts.
The first half, Modeling, offers lumped- and distributed-parameter types that permit the dynamic habit of the drill string to be characterised; a accomplished mathematical version taking into consideration mechanical and electrical parts of the final drilling method is additionally supplied. The allotted nature of the method is accommodated through contemplating a process of wave equations topic to nonlinear boundary stipulations; this version is reworked right into a pair of neutral-type time-delay equations which may triumph over the complexity enthusiastic about the research and simulation of the partial differential equation model.
The moment half, research, is dedicated to the learn of the reaction of the process defined via the time-delay version; vital homes worthwhile for interpreting method balance are investigated and frequency- and time-domain thoughts are reviewed.
Part III, keep an eye on, issues the layout of stabilizing regulate legislation geared toward removing bad drilling vibrations; various keep watch over thoughts according to infinite--dimensional approach representations are designed and evaluated. The keep watch over proposals are proven to be powerful in suppressing stick-slip and bit-bounce in order that a substantial development of the general drilling functionality could be achieved.
This self-contained ebook presents operational instructions to prevent drilling vibrations. in addition, because the modeling and keep an eye on thoughts awarded right here could be generalized to regard various engineering difficulties, it constitutes an invaluable source to researchers engaged on keep watch over and its engineering program in oil good drilling.
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