Schlumberger conventional crank balanced and beam balanced pumping units are among the most respected and recognized brands in the rod pumping industry offering reliable cost effective performance at a competitive price.
Air balanced pump jack.
In the early days pumpjacks worked by rod lines running horizontally above the ground to a wheel on a rotating eccentric in a mechanism known as a central power.
Manufactured to api standards these units deliver high reliability and quiet operations.
The central power which might operate a dozen or more pumpjacks would be powered by a steam or internal combustion engine or by an electric motor.