Crude oil production, onshore oil, crude oil, oil production, Onshore oilfield, oilfield, beam pump, beam pumps, nodding donkeys, nodding donkey

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A pumpjack is the overground drive for a reciprocating piston pump in an oil well. It is used to mechanically lift liquid out of the well if not enough bottom hole pressure exists for the liquid to flow all the way to the surface. The arrangement is commonly used for onshore wells producing little oil. Wikipedia

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