Nonlinear output-feedback control of torsional vibrations in drilling systems
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DOI: 10.1002/rnc.3759
Abstract: This paper considers the design of a nonlinear observer-based output-feedback controller for oil-field drill-string systems aiming to eliminate (torsional) stick-slip oscillations. Such vibrations decrease the performance and reliability of drilling systems and can ultimately lead… read more here.
Keywords: stick slip; drilling systems; output feedback; control ... See more keywords
Dynamics of Drilling Systems With an Antistall Tool: Effect on Rate of Penetration and Mechanical Specific Energy
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DOI: 10.2118/194487-pa
Abstract: This paper considers the effect of an antistall tool on the dynamics of deep drilling systems. Field results show that the antistall tool increased the rate of penetration (ROP) of drilling systems when compared with… read more here.
Keywords: antistall tool; mechanical specific; rate penetration; drilling systems ... See more keywords