Oilfield terminology

thumb|A thin section of a volcanic sand grain seen under the [[microscope, with plane-polarized light in the upper picture, and cross-polarized light in the lower picture. Scale box is 0.25 mm.]]

integrated system that drills wells

A wellhead is the component at the surface of an oil or gas well that provides the structural and pressure-containing interface for the drilling and production equipment.thumb|Wellhead gas storage, Etzel Germany right|thumb|Oil well Christmas tree

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mechanical device used to turn a drill string

Coloumn or string of drill pipe that transmits drilling fluid

hydrocarbons