The assembly of fittings, valves, and controls located at the surface and connected to the flow lines, tubing, and casing of the well so as to control the flow from the reservoir.

A drip located in a line near the wellhead.

(1) A gas containing water, or a gas which has not been dehydrated. (2) A term synonymous with rich gas, i.e., a gas from which products have not been extracted. Refer to definition of "rich gas."

A term for oil having no color.

An obsolete term for natural gas liquids before fractionation and stabilization.