Feedback control method to suppress stick-slip in drill-strings featuring delay and actuation constraints

MacLean, J. D.; Vaziri, Vahid; Aphale, Sumeet S.; Wiercigroch, Marian

doi:10.1140/epjs/s11734-021-00228-4

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…The performed computer simulation of drilling modes confirmed the possibility of the stick-slip effect occurrence, accompanied by high-frequency vibrations during bit stops, during which it is possible to change the direction of rotation of the bit, its accelerated wear and unscrewing of the drilling tool. The model can be used as a base for further improvement of the control of the rotary [43][44][45] and other [46][47][48][49] drilling methods.…”

Section: Discussionmentioning

confidence: 99%

A complex model of a drilling rig rotor with adjustable electric drive

Ershov

Komkov

Feoktistov

2023

PMI

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A modified mathematical model of an asynchronous electric drive of the rotor – a drill string – a bit – a rock is considered and implemented, which develops and generalizes the results of previously performed studies. The model includes the following subsystems: a model of an asynchronous drive with vector control; a model of formation of the resistance moment at the bottom of the bit, taking into account the peculiarities of the interaction between the bit and the rock; a model of a multi-mass mechanical part that takes into account the deformation of the drill string; subsystem for the drilling rig energy-technological parameters formation. The integrated model makes it possible to calculate and evaluate the selected drilling modes, taking into account their electro-mechanical, energy and technological efficiency and the dynamics of drilling processes. The performed computer simulation of drilling modes confirmed the possibility of a stick-slip effect accompanied by high-frequency vibrations during bit stops, which may change the direction of rotation of the bit, its accelerated wear and unscrewing of the drilling tool. Long bit stops lead to a significant decrease in the average bit rotation speed, which can explain the decrease in the ROP and increase in energy consumption when drilling in the zone of unstable bit rotation. The model can be used as a base for further improvement of rotary drilling control systems.

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Section: Discussionmentioning

confidence: 99%

A complex model of a drilling rig rotor with adjustable electric drive

Ershov

Komkov

Feoktistov

2023

PMI

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“…MacLean et al [20] numerically investigate the effects of actuator delay and actuation constraints on the performance of a modified integral resonant controller with integral tracking. Actuation delay and constraints naturally limit controller performance, so much so that they can cause instabilities.…”

Section: Contributed Papers In This Special Issuementioning

confidence: 99%

Mathematical modelling, nonlinear dynamics, bifurcation, synchronization and control of mechanisms driven by power supply

Balthazar

Gonçalves

Tusset

et al. 2021

Eur. Phys. J. Spec. Top.

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The special issue entitled "Mathematical modelling, nonlinear dynamics, bifurcation, synchronization and control of mechanisms driven by power supply," published by The European Physical Journal: Special Topics (EPJST), aims to bring into discussion works involving nonlinear and dynamic and chaotic behaviors, which are frequently found in mechanical and electromechanical systems, nonlinear circuits, and biologically inspired systems, stimulating the integration of findings on the nonlinear dynamics that can be observed in various systems in the physical sciences and engineering. This special issue presents 27 papers concerning the dynamics and control of flexible structure systems, nonideal systems, energy harvesting problems, and vibration absorbers. In addition, the papers address problems involving chaos control of nonlinear oscillations, phase-locked loops, synchronization of nonlinear oscillators, dynamics of bio-inspired and biostructural systems, nonlinear methods, and nonlinear circuits.

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