Thesis-2003-Batako.pdf (7.17 MB)

A self-exciting system for percussive–rotary drilling

Download (7.17 MB)
thesis
posted on 23.07.2018, 15:35 by Andre D.L. Batako
A dynamic model for a new principle of self-excited percussive–rotary drilling is presented. The system uses the stick-slip phenomenon to generate an impact action superimposed on the drilling process. This is a strongly nonlinear mechanical system with two-degrees-of-freedom, in which friction-induced vibration is used for excitation of impacts. The model has to take account of the returning effect that the impacts have on the parameters of stick-slip motion. The model incorporates friction force as a function of sliding velocity, where the self-excitation of coupled vibration of the rotating bit and the striker tend to a steady-state periodic cycle. Dynamic coupling of vibro-impact action with the stick-slip process brings innovative adaptive features into the drilling process. [Continues.]

Funding

Loughborough University, Faculty of Engineering. British Gas Technology Research Centre.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Publisher

© A.D.L. Batako

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2003

Notes

A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.

Language

en

Usage metrics

Mechanical, Electrical and Manufacturing Engineering Theses

Keywords

Exports