Numerical and experimental studies of stick–slip oscillations in drill-strings

Liu, Yang; Chávez, Joseph Páez; De, Rulston; Walker, Scott J.I.

doi:10.1007/s11071-017-3855-9

Cited by 60 publications

(14 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fluctuated component of the drilling torque, T 3 can be considered as a result of the stick-slip response of the drilling system, which was apparent in the deep drilling of oil and gas [39,40]. In metal deep drilling, when chips stuck inside the flutes, a cumulative resistant torque occurred and thus required an increase of consumption torque.…”

Section: The Stick-slip Torquementioning

confidence: 99%

A New Approach to Modelling the Drilling Torque in Conventional and Ultrasonic Assisted Deep-Hole Drilling Processes

Chu

Nguyen²,

Ngo

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

This paper presents a new approach to developing the torque model in deep hole drilling, both for conventional and ultrasonic assisted drilling processes. The model was proposed as a sum of three components: the cutting, the chip evacuation and the stick-slip torques. Parameters of the new model were carried out by applying the regression analysis technique, with the correlation values higher than 0.999. The data were collected from 36 experimental dry drilling tests, both in conventional and ultrasonic assisted cutting conditions, with the depth-to-diameter of the drilled holes of 7.5. The major advantage of the new model compared to previous models is that the new model of chip-evacuation torque has only one coefficient, thus making it easier to evaluate and compare different deep-drilling processes. The effectiveness of ultrasonic assistance in deep hole drilling was also highlighted using the proposed model. The new model is promising to predict critical depth and torque in deep hole drilling.

show abstract

Section: The Stick-slip Torquementioning

confidence: 99%

A New Approach to Modelling the Drilling Torque in Conventional and Ultrasonic Assisted Deep-Hole Drilling Processes

Chu

Nguyen²,

Ngo

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Impacting systems are very common and important components in many engineering applications, such as self-propelled capsule systems [1,2], rotor systems [3,4], energy harvesting [5], mechanical bearings [6], manufacturing cutting [7], and oil and gas drilling [8][9][10]. Impacting systems show many complex nonlinear phenomena, e.g.…”

Section: Introductionmentioning

confidence: 99%

Controlling grazing-induced multistability in a piecewise-smooth impacting system via the time-delayed feedback control

et al. 2021

Self Cite

View full text Add to dashboard Cite

Grazing events may create coexisting attractors and cause complex dynamics in piecewise-smooth dynamical systems. This paper studies the control of grazing-induced multistability in a soft impacting oscillator by using the time-delayed feedback control. The control switches from one of the coexisting attractors to a desired one to suppress complex dynamics near grazing events. We use path-following (continuation) techniques for non-smooth dynamical systems to investigate robustness of the controller and the parameter dependence of the controlled system. In particular, several newly developed computational methods are used, including a numerical method for analysing non-smooth delay equations and a method for calculating the Lyapunov exponents and the grazing point estimation. Numerical simulations demonstrate that the delayed feedback controller is effective, and a proper selection of the control gain and delay time can simplify the complex dynamics of the system near grazing.

show abstract

“…Therefore, it is necessary to analyze the drill string system using non-linear dynamic theory [1]. Liu et al [2] studied the stick-slip encountered in drill strings with both experimental and numerical methods. The numerical method is used for non-smooth dynamical systems, with a particular focus on multistability in drill strings.…”

Section: Introductionmentioning

confidence: 99%

Non-Linear Dynamic Analysis of Drill String System with Fluid-Structure Interaction

et al. 2021

View full text Add to dashboard Cite

In this research, the non-linear dynamics of the drill string system model, considering the influence of fluid—structure coupling and the effect of support stiffness, are investigated. Using Galerkin’s method, the equation of motion is discretized into a second-order differential equation. On the basis of an improved mathematical model, numerical simulation is carried out using the Runge—Kutta integration method. The effects of parameters, such as forcing frequency, perturbation amplitude, mass ratio and flow velocity, on the dynamic characteristics of the drill string system are studied under different support stiffness coefficients, in which bifurcation diagrams, waveforms, phase diagrams and Poincaré maps of the system are provided. The results indicate that there are various dynamic model behaviors for different parameter excitations, such as periodic, quasi-periodic, chaotic motion and jump discontinuity. The system changes from chaotic motion to periodic motion through inverse period-doubling bifurcation, and the support stiffness has a significant influence on the dynamic response of the drill string system. Through in-depth study of this problem, the dynamic characteristics of the drill string can be better understood theoretically, so as to provide a necessary theoretical reference for prevention measures and a reduction in the number of drilling accidents, while facilitating the optimization of the drilling process, and provide basis for understanding the rich and complex nonlinear dynamic characteristics of the deep-hole drill string system. The study can provide further understanding of the vibration characteristics of the drill string system.

show abstract

Numerical and experimental studies of stick–slip oscillations in drill-strings

Cited by 60 publications

References 33 publications

A New Approach to Modelling the Drilling Torque in Conventional and Ultrasonic Assisted Deep-Hole Drilling Processes

A New Approach to Modelling the Drilling Torque in Conventional and Ultrasonic Assisted Deep-Hole Drilling Processes

Controlling grazing-induced multistability in a piecewise-smooth impacting system via the time-delayed feedback control

Non-Linear Dynamic Analysis of Drill String System with Fluid-Structure Interaction

Contact Info

Product

Resources

About