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Appl. Sci. 2017, 7(4), 360; doi:10.3390/app7040360

Performance Analysis of a Fluidic Axial Oscillation Tool for Friction Reduction with the Absence of a Throttling Plate

1
Key Laboratory of Ministry of Land and Resources on Complicated Conditions DrillingTechnology, Jilin University, Changchun 130026, China
2
College of Construction Engineering, Jilin University, Changchun 130026, China
3
Engineering and Technology Research Institute, CNPC Bohai Drilling Engineering Company Limited, Tianjin 300280, China
*
Author to whom correspondence should be addressed.
Academic Editor: Kuang-Chao Fan
Received: 13 January 2017 / Revised: 29 March 2017 / Accepted: 30 March 2017 / Published: 5 April 2017
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Abstract

An axial oscillation tool is proved to be effective in solving problems associated with high friction and torque in the sliding drilling of a complex well. The fluidic axial oscillation tool, based on an output-fed bistable fluidic oscillator, is a type of axial oscillation tool which has become increasingly popular in recent years. The aim of this paper is to analyze the dynamic flow behavior of a fluidic axial oscillation tool with the absence of a throttling plate in order to evaluate its overall performance. In particular, the differences between the original design with a throttling plate and the current default design are profoundly analyzed, and an improvement is expected to be recorded for the latter. A commercial computational fluid dynamics code, Fluent, was used to predict the pressure drop and oscillation frequency of a fluidic axial oscillation tool. The results of the numerical simulations agree well with corresponding experimental results. A sufficient pressure pulse amplitude with a low pressure drop is desired in this study. Therefore, a relative pulse amplitude of pressure drop and displacement are introduced in our study. A comparison analysis between the two designs with and without a throttling plate indicates that when the supply flow rate is relatively low or higher than a certain value, the fluidic axial oscillation tool with a throttling plate exhibits a better performance; otherwise, the fluidic axial oscillation tool without a throttling plate seems to be a preferred alternative. In most of the operating circumstances in terms of the supply flow rate and pressure drop, the fluidic axial oscillation tool performs better than the original design. View Full-Text
Keywords: axial oscillation tool; output-fed bistable fluidic oscillator; throttling plate; computational fluid dynamics axial oscillation tool; output-fed bistable fluidic oscillator; throttling plate; computational fluid dynamics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, X.; Peng, J.; Liu, H.; Wu, D. Performance Analysis of a Fluidic Axial Oscillation Tool for Friction Reduction with the Absence of a Throttling Plate. Appl. Sci. 2017, 7, 360.

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