directional drilling(redirected from Slant drilling)
Also found in: Financial, Encyclopedia.
(Mining & Quarrying) a method of drilling for oil in which the well is not drilled vertically, as when a number of wells are to be drilled from a single platform to reach different areas of an oil field. Also called: deviated drilling
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014