Abstract
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 language | English |
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Pages (from-to) | 245-249 |
Number of pages | 5 |
Journal | International Journal of Mining Science and Technology |
Volume | 24 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Jan 2014 |
Keywords
- 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