directional well

{{Short description|Oil well with a borehole that deviates from a vertically straight line}}

{{Dicdef|date=May 2023}}

Image:True vertical depth.jpg, while line (b) is the borehole itself, and its length is called the measured depth]]

A directional well is the oil industry term for an oil well with a borehole that deviates from a vertically straight line. This is normally done with the intention of hitting several target sands, for instance.