<P> A pumpjack ( also called oil horse , oil jack , donkey pumper , nodding donkey , pumping unit , horsehead pump , rocking horse , beam pump , dinosaur , grasshopper pump , Big Texan , thirsty bird , cricket , or jack pump ) is the overground drive for a reciprocating piston pump in an oil well . </P>
<P> A pumpjack ( also called oil horse , oil jack , donkey pumper , nodding donkey , pumping unit , horsehead pump , rocking horse , beam pump , dinosaur , grasshopper pump , Big Texan , thirsty bird , cricket , or jack pump ) is the overground drive for a reciprocating piston pump in an oil well . </P>
where does the oil go from a pump jack
where does the oil go from a pump jack
reciprocating piston pump
reciprocating piston pump