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Journal ArticleDOI

Oil and gas well drilling: A vibrations perspective

Pol D. Spanos, +3 more
- 01 Mar 2003 - 
- Vol. 35, Iss: 2, pp 85-103
TLDR
In this paper, the process of oil well rotary drilling is discussed from a vibrations perspective, along with a synopsis of the equipment used and of the procedures followed, and the performance modeling and monitoring are discussed, including data acquisition and utilization.
Abstract
The process of oil well rotary drilling is discussed from a vibrations perspective. Furthermore, a synopsis of the equipment used and of the procedures followed is included. Performance modeling and monitoring are discussed, along with data acquisition and utilization. Axial, torsional, and lateral vibrations are reviewed. Typical operational difficulties such as sticking, buckling, and fatiguing of strings are also reviewed. Finally, emerging techniques of analysis such as stochastic treatment, and optimization are discussed. To enhance the utility of the paper, references readily available in the form of books or archival journal publications are primarily cited. Furthermore, mathematical rigor and phenomenological completeness are sporadically moderated to conform with paper length limitations.

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Journal ArticleDOI

Non-linear dynamics of a drill-string with uncertain model of the bit-rock interaction

TL;DR: In this paper, a stochastic computational model is proposed to model uncertainties in the bit-rock interaction model and a new strategy that uses the non-parametric probabilistic approach is developed to take into account model uncertainties.
Journal ArticleDOI

Multiple mode analysis of the self-excited vibrations of rotary drilling systems

TL;DR: In this article, the authors extended the analysis of the self-excited vibrations of a drilling structure presented in an earlier paper by basing the formulation of the model on a continuum representation of the drillstring rather than on a characterization of the drilling structure by a 2 degree of freedom system.
Journal ArticleDOI

Stability analysis of a state dependent delayed, coupled two DOF model of drill-stringvibration

TL;DR: In this article, a fully coupled two-degree-of-freedom model is proposed for rotary drilling of oil-wells, which assumes a state-dependent time delay and a viscous damping for both the axial and torsional motions.
Journal ArticleDOI

Unveiling complexity of drill–string vibrations: Experiments and modelling

TL;DR: In this article, the authors investigate complex drill string dynamics on a novel experimental rig, capable of reproducing all major types of drill string vibrations, such as stick-slip oscillations, whirling, drill-bit bounce and helical buckling of the drill string.
Journal ArticleDOI

Modeling and analysis of stick-slip and bit bounce in oil well drillstrings equipped with drag bits

TL;DR: In this paper, a physically consistent nonlinear model for the axial and torsional motions of a rotating drillstring equipped with a drag bit is proposed and a more realistic cutting and contact model is used to represent bit/rock formation interaction at the bit.
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