Theoretical analysis and design of hydro-hammer with a jet actuator: An engineering application to improve the penetration rate of directional well drilling in hard rock formations

• Jiang-fu He,

  Roles Formal analysis, Investigation, Methodology, Writing – original draft

  Affiliations State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China, Post-doctoral Research Station of Mineral Engineering, Chongqing University, Chongqing, China, College of Resources and Environmental Science, Chongqing University, Chongqing, China

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• Yun-pei Liang ,

  Roles Methodology, Project administration

  * E-mail: liangyunpei@cqu.edu.cn

  Affiliations State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China, College of Resources and Environmental Science, Chongqing University, Chongqing, China

  http://orcid.org/0000-0001-5372-9178

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• Li-jia Li,

  Roles Investigation

  Affiliations State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China, College of Resources and Environmental Science, Chongqing University, Chongqing, China

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• Yong-jiang Luo

  Roles Formal analysis, Software, Writing – review & editing

  Affiliations State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China, College of Resources and Environmental Science, Chongqing University, Chongqing, China

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