An adaptive observer for hyperbolic systems with application to UnderBalanced Drilling
, 2014 International audienceWe present an adaptive observer design for a first-order hyperbolic system of Partial Differential Equations with uncertain boundary parameters.
Bresch-Pietri, Delphine +2 more
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Experimental study and dynamic characteristics analysis of partially liquid-filled annulus tubes. [PDF]
PLoS One, 2018 Sun H, Zhang A, Li H.
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Downhole Applications of Magnetic Sensors. [PDF]
Sensors (Basel), 2017 Gooneratne CP, Li B, Moellendick TE.
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This paper presents a model to describe the nonlinear dynamics of a drillstring in horizontal con guration, which is intended to correctly predict the three-dimensional dynamics of this complex structure. This model uses a beam theory, with e ects of rotatory inertia and shear deformation, which is capable of reproducing the large displacements that ...
Cunha Jr, A. +2 more
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Model reduction of neutral linear and nonlinear time-invariant time-delay systems with discrete and distributed delays [PDF]
, 2015 Astolfi, A, Scarciotti, G
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Vibration behavior analysis of reamers based on drill string dynamics. [PDF]
Sci RepFusheng Y +4 more
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An analytical model for quantitative evaluation of friction drag in directional sliding drilling. [PDF]
Sci RepMa Z +6 more
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The impact of multidirectional excitation on the stick-slip vibration characteristics of a drill string. [PDF]
Sci RepHongshan Z, Wenchang W, Kaixian A.
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Multiphase Transient Flow in Wellbore during Shallow Hydrate Reservoir Drilling in Deep Water. [PDF]
ACS OmegaYin B +6 more
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