GLOSSARY

on an engine, a device, powered by the engine, that moves coolant (water) through openings in the engine block, through the radiator or heat exchanger, and back into the block.

A hole drilled or bored into the earth, usually cased with metal pipe, for the production of gas or oil. A hole for the injection under pressure of water or gas into a subsurface rock formation.

Recording information about subsurface geological formations; methods include records kept by the driller, mud and cutting analysis, drill stem tests and electric and radioactivity procedures

Well drilled in unproven territory

Operation on a shut-in or producing well to restore or increase its production