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Drill-String Dynamics: Reduced-Order Models

Volume 10: Mechanical Systems and Control, Parts A and B, 2009
Research efforts are underway to model and study the dynamics of a drill string, and preliminary results are presented in this work. The dynamics of a drill string system has non-smooth characteristics. Moreover, the drill string system dynamics exhibits qualitative changes with respect to the rotation speed of the drill string and friction ...
Chien-Min Liao, Balakumar Balachandran, Mansour Karkoub   +2 more
openaire   +2 more sources

An Integrated Model for Drill-String Dynamics

Journal of Sound and Vibration, 1999
The vibrational states experienced by the active components of a drilling assembly such as that found in the oil or gas industry are discussed in the context of an integrated mathematical model. The work is motivated by the need to understand the complex vibrational states that such a system can exhibit in order to better control their constructive and
Tucker, Robin, Wang, Charles
openaire   +2 more sources

Drill-String Dynamics: Reduced-Order Models and Experimental Studies

Journal of Vibration and Acoustics, Transactions of the ASME, 2011
In this article, reduced-order models of a drill-string system are developed, the predictions of these models are studied, and qualitative comparisons are made with experimental studies.
Chien-Min Liao, Balakumar Balachandran, Mansour Karkoub   +2 more
exaly   +2 more sources

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Dynamic Buckling Characteristics of Drill String in Horizontal Wells

International Journal of Structural Stability and Dynamics, 2023
Buckling may cause drill string damage or even drilling failure. For the 3[Formula: see text]000-m-long horizontal section drill string, a simplified analysis model of drill string in horizontal well is established, and the dynamic response results of axial displacement, angular displacement and contact force are obtained.
Jialin Tian, Haolin Song, Yinglin Yang, Lanhui Mao, Junyang Song   +4 more
openaire   +1 more source

Nonlinear Model for Dynamic Behavior of Drill-String

Engineering Technology Conference on Energy, Parts A and B, 2002
This article is devoted to the study of the contact between the drill-string and the well during drilling operations. The study focuses on the Bottom-Hole-Assembly (BHA), which is submitted to compression. The work is motivated by the need to understand the complex behavior of such a system, in order to improve control their constructive and ...
Melakhessou, Hayet, Berlioz, Alain, Ferraris Besso, Guy   +2 more
openaire   +2 more sources

Hysteretic bit/rock interaction model to analyze the torsional dynamics of a drill string [PDF]

Mechanical Systems and Signal Processing, 2018
The present paper proposes a novel hysteretic (non-reversible) bit/rock interaction model for the torsional dynamics of a drill string. Non-reversible means that the torque-on-bit depends not only on the bit speed, but also on the bit acceleration ...
A Batou, Thiago G Ritto
exaly   +2 more sources

Dynamics, Nonlinear Instabilities, and Control of Drill-strings

2020
Drill strings are flexible, slender structures, which are many kilometers long. They are used to transmit the rotary motion to the drill bit in the process of drilling a borehole. Due to the flexibility of the drill string and nonlinear interactions between the drill bit and rock, these systems often experience severe vibrations, and these vibrations ...
openaire   +2 more sources

Reliability Analysis of the Dynamics of a Horizontal Drill-String

2014
Nowadays directional drilling, such as horizontal drilling, is very common. This chapter deals with the reliability analysis of a horizontal drill-string dynamics. A stochastic probabilistic computational model is considered, where a bar model (tension/compression) is used for the drill-string, and the system is discretized by means of the finite ...
T. G. Ritto, Rubens Sampaio
openaire   +1 more source

Dynamic Valuation Methodology for Fatigue Failure of Drill String

IADC/SPE Asia Pacific Drilling Technology Conference, 2016
Abstract Fatigue is one of the reasons for drill string failure. Based on the static stress characteristics, fatigue ratio was usually used to assess the risk of drill string fatigue failure, but it only takes the static stress into account.
Qinfeng Di, Mingjie Wang, He Zhang, Wenchang Wang, Guangxu Qin   +4 more
openaire   +1 more source