A well constructed by a powered rotary or cable-tool rig that can reach hundreds or thousands of feet.
A drilled well is the standard modern water well: a rotary rig bores through soil and rock, casing is set, the producing zone is screened or open-hole, and a submersible pump is installed. Drilled wells reach the deeper, more reliable aquifers Utah owners need and are the only option in most of the state's hard-rock and deep-basin terrain.