Volume 18, Issue 4 (International Journal of Engineering 2007)                   IJIEPR 2007, 18(4): 59-66 | Back to browse issues page

XML Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Ahmadian H, Nazari S, Jalali H. Drill string Vibration Modeling Including Coupling Effects . IJIEPR 2007; 18 (4) :59-66
URL: http://ijiepr.iust.ac.ir/article-1-30-en.html
1- , ahmadian@iust.ac.ir
Abstract:   (13665 Views)

Abstract: The governing equations of motion for a drill string considering coupling between axial, lateral and torsional vibrations are obtained using a Lagrangian approach. The result leads to a set of non-linear equations with time varying coefficients. A fully coupled model for axial, lateral, and torsional vibrations of drill strings is presented. The bit/formation interactions are assumed to be related to the following parameters: bit motion, effects of gyroscopic moments, contact with the borehole wall, axial excitation due to bit/formation interactions, and hydrodynamic damping due to the presence of drilling mud. Simulation results show that parametric resonance and whirling may occur simultaneously within the range of operating conditions of drilling. The contact force between collar and borehole wall is calculated and its behavior is investigated. The dynamic behavior is quite complicated and may become non-periodic, suggesting a chaotic behavior.

  

Full-Text [PDF 385 kb]   (6187 Downloads)    
Type of Study: Research | Subject: Material Managment
Received: 2009/04/20 | Published: 2007/12/15

Add your comments about this article : Your username or Email:
CAPTCHA

Send email to the article author


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.