Results 41 to 50 of about 875 (185)
Helical Buckling of Drill-Strings
MATEC Web of Conferences, 2018 This paper presents experimental and numerical investigations of the complex drill-string vibration, with particular attention to the helical buckling of drill-strings and its influence on the system dynamics.
Kapitaniak Marcin +2 more
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Nonlinear dynamics of torsional waves in a drill-string model with spatial extent [PDF]
, 2007 In this paper we investigate the dynamics and bifurcations of an oil-well drill-string model that takes the form of a neutral delay differential equation (NDDE). We consider the torsional mode of the drill-string and investigate the associated stick-slip
Wilson, RE, Barton, DAW, Krauskopf, B
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State-Dependent Delay and Drill-String Dynamics
Procedia IUTAM, 2017 Abstract In this work, stability analysis carried out with a reduced-order model of a drill string is presented. This model, which is nonlinear in nature and contains a state-dependent delay, is used to study coupled axial and torsion dynamics of the system.
Xie Zheng, Balakumar Balachandran
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Drill string torsional vibrations modeling with dynamic drill pipe properties measurement and field validation [PDF]
, 2022 This paper aims to present the drill string torsional dynamics through a lumped parameter modeling using the basic physical notions with continuous measurement of drill pipe mechanical properties (inertia, damping, and stiffness).
Youcefi, Mohamed Riad +2 more
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Mathematics, 2021 Friction-induced stick-slip vibrations are one of the major causes for down-hole drill-string failures. Consequently, several nonlinear models and control approaches have been proposed to solve this problem.
Jorge Pérez-Aracil +5 more
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Effect of vibration dampers on the dynamic state of a drill string
Technology audit and production reserves, 2023 The object of research is the drill string bottom structure using the correcting devices of drilling modes to control the dynamics of the drill string. The work is aimed at the study of longitudinal, torsional and transverse oscillations when adjusting the axial load on the bit by using a drilling shock absorber with a two-link characteristic.
Viktor Svitlytskyi +2 more
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Understanding and Eliminating Drill String Twist-Offs by the Collection of High Frequency Dynamics Data [PDF]
, 2011 Drill string twist-offs are an expensive problem to the oil and gas drilling industry. With ever increasing rig and operating costs, there is an increased focus to avoid twist-off related expenses, such as: costs associated with time required to trip out
Daniel Perez +2 more
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LQR Control of Axial-Torsional Bidirectional Vibration of Drill String in Oil and Gas Wells
Shiyou jixieTo effectively solve the failure problem induced by axial-torsional bidirectional vibration of drill string， with the help of the 3-DOF dynamics model of drill pipe， a simulation study was performed on the suppression of linear quadratic regulator （LQR ...
Li Xinye +4 more
doaj +3 more sources
Petroleum, 2023 Improper drilling parameters may cause severe vibration of drill string which leads to reduce the rate of penetration and drilling tool premature failure accidents in the drilling process of ultra-deep well.
Yuan Li +4 more
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EXPERIMENTAL AND NUMERICAL STUDIES OF DRILL-STRING DYNAMICS [PDF]
, 2011 A drill string is the transmission component of rotary drill-rig system used for mining petroleum and natural gas resources. The drill-string system is essentially a long slender structure whose length can be in kilometers. Additionally, the drill-string
Liao, Chien-Min
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