Paper: Specialized Pumps -- The Double Volume And The Two - Stage

In this day of specialism it is only natural the oil well pump manufacturers should follow this normal trend by supplying pumps which are designed for specific application. Heretofore, the oil producer has been obliged to utilize available pump assemblies in an effort to combat unfavorable well conditions. In doing so the volumetric efficiency of the pumping system has been considerably lessened. Our discussion concerns two such pumps which are designed for specific applications, the Double Volume and the Two-Stage.