drillhole

drillhole

(ˈdrɪlˌhəʊl)
n
a hole drilled in the ground, usually for exploratory purposes
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
While other nations are pouring more money than ever into scientific drilling projects that reach deep into the earth's crust, researchers at the deepest scientific drillhole in the United States, located near the San Andreas fault, are packing up their instruments.
- 4 metres (m) at 420 g/t gold, 170 g/t silver from 67 m down hole, within 17.7 m at 100 g/t gold in drillhole 122SD12, and
After the geological model is completed from drillhole information, cross-section and volume calculations may be made.
In the past this layer, normally covered by 2 kilometers of upper crust, had escaped the reach of even the longest drillhole in the ocean.
Normally, this lubricant, which is used to remove cuttings from the drillhole, circulates through the drillhole without loss.
Four close-spaced drill holes have been completed to define the extent of the quartz roscoelite bonanza gold zone within the BZ Zone at Mt Kare, around drillhole 122SD11.