Research Article | OPEN ACCESS
Analysis of Signal Attenuation of Continuous Wave in Drill String
Peng Jia, Deli Gao and Jun Fang
Key laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing 102249, P.R. China
Research Journal of Applied Sciences, Engineering and Technology 2013 15:4018-4022
Received: December 08, 2012 | Accepted: January 11, 2013 | Published: April 25, 2013
Abstract
In this study, the friction model in non-Newtonian drilling fluid is developed to evaluate the signal attenuation in the information transmission with the continuous wave. A model of transient non-Newtonian power-law pipe flow is developed by assuming a steady viscosity varied only with the radius and the solution is derived analytically in complex domain and time domain. The frequency-dependent friction is developed based on the solution in the time domain and is used in the pressure wave transmission. And the analysis results show that the highest pressure amplification with resonant frequency increases with the power-law index n increase and the resonant frequency increases with the n decrease.
Keywords:
Continuous wave, frequency-dependent friction, non-Newtonian, propagation constant,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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