Exploration and determination of the principles of rotary-percussive underground slimhole drilling

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A possibility of the efficient use of rotary percussive drilling to provide drilling smaller diameter holes (40-70 mm) both in mining and prospecting is disclosed herein. A new construction designed for the nipple thread connection is described. The relative amplitude variation, change of power pulse time and energy in their propagation throughout the drilling tool are determined. A possibility of the efficient power pulse transfer along the drill string to the rock destruction tools with new nipple connections which allow automating the make-up and breakout system of drill pipe was supported by experiments.

Original languageEnglish
Pages (from-to)245-249
Number of pages5
JournalInternational Journal of Mining Science and Technology
Issue number2
Publication statusPublished - 1 Jan 2014



  • Drill string
  • Nipple thread connection
  • Percussive energy
  • Power pulse
  • Rotary-percussive drilling
  • Smaller diameter holes

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology
  • Geochemistry and Petrology

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