Natural gas produced with crude oil from the same reservoir.

Unit of measure for oil and petroleum products that is equivalent to 42 U.S. gallo

The uncontrolled flow of gas, oil or other fluids from a well

The equipment installed at the wellhead to control pressures in the annular space between the casing and drill pipe or tubing during drilling, completion, and workover operations.

A measure of the heating value of a fuel.

Metal pipe inserted into a wellbore and cemented in place to protect both subsurface formations (such as groundwater) and the wellbore. A surface casing is set first to protect groundwater.