| Issue |
MATEC Web Conf.
Volume 148, 2018
International Conference on Engineering Vibration (ICoEV 2017)
|
|
|---|---|---|
| Article Number | 16005 | |
| Number of page(s) | 5 | |
| Section | Vibration and Control in Downhole Drilling Processes | |
| DOI | https://doi.org/10.1051/matecconf/201814816005 | |
| Published online | 02 February 2018 | |
Proportional-Derivative Control of Stick-Slip Oscillations in Drill-Strings
1
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, 610500, China
2
College of Engineering Mathematics and Physical Sciences, University of Exeter, North Park Road, Exeter, EX4 4QF, UK
* Corresponding author: y.liu2@exeter.ac.uk
Stick-slip oscillation in drill-string is a universal phenomenon in oil and gas drilling. It could lead to the wear of drill bit, even cause catastrophic failure of drill-strings and measurement equipment. Therefore, it is crucial to study drilling parameters and develop appropriate control method to suppress such oscillation. This paper studies a discrete model of the drill-string system taking into account torsional degree-of-freedom, drill-string damping, and highly nonlinear friction of rock-bit interaction. In order to suppress the stick-slip oscillation, a new proportional-derivative controller, which can maintain drill bit’s rotation at a constant speed, is developed. Numerical results are given to demonstrate its efficacy and robustness.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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