Arabian Journal for Science and Engineering

, Volume 44, Issue 2, pp 1069–1079 | Cite as

A Novel Double Bevel Support Structure for Downhole Robot

  • Qingyou Liu
  • Jianguo ZhaoEmail author
  • Haiyan Zhu
  • Wei Zheng
  • Yaqiang Yang
Research Article - Mechanical Engineering


Downhole robot is driven by friction force between the downhole robot and the borehole wall. The traction force \(=\) friction coefficient * support force. The friction coefficient is generally ranging from 0.1 to 0.4, and the support force is usually small. So the traction force of the downhole robot has been subject to the objective conditions. In order to improve the traction force, in this paper, a novel downhole robot with double bevel self-locking structure (DBSS) is invented. The mechanical model of the DBSS is established. And the mathematical equations of mechanical model are deduced according to the mechanical model. Furthermore, the angle ranges of the bevels and the friction coefficient of each contact surface are obtained. Then, an experimental device of DBSS is designed and fabricated. And the experimental results show that the experimental data are basically the same as the theoretical calculation values. The proposed DBSS will have a great application prospect on downhole robot with large traction force. And the DBBS will reduce the damage produced by the friction block compared with the cam self-locking structure.


Downhole robot Double bevel Self-locking Traction force Support force Support structure 


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This work is supported by the Science and Technology Project of Sichuan Province (Nos. 2013GZ0150, 2014GZ0121, 2015SZ0010). This work is also supported by Research Project of Key Laboratory of Fluid and Power Machinery (Xihua University).


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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.School of Mechatronics EngineeringSouthwest Petroleum UniversityChengduChina
  2. 2.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengduChina
  3. 3.Key Laboratory of Fluid and Power Machinery of Ministry of Education (Xihua University)Ministry of EducationChengduChina

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