Deliverable 5.4: Report on Novel Water Jet Drilling Tool

Gradzki D. P., Niklas Geißler, Jascha Börner, Viktor Hartung, Simon Hahn & Volker Wittig
Work at GZB (International Geothermal Centre) had been focused on several potential, novel micro type drilling technologies. These technologies have been investigated and discussed to determine possible future options. In this report the different technologies are being presented, starting with abrasive enhanced jetting, followed by pulsation and mechanically supported drilling, ending with percussion type mechanical rock destruction and drilling. Their influence on rock disintegration and drilling efficiency have been investigated in several laboratory experiments. These...
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