Paper: A Brief Review of Hydraulic Pump Operation

The term "hydraulic pumping system" as used herein, is taken to mean a particular method of lifting fluid from oil reservoirs, in which a power pump, distribution lines, subsurface pumps, and other auxiliary components are employed. Some of the most familiar manufacturers of this type of pumping equipment are Kobe, Inc., Sargent Engineering Corporation, and National Supply Company. Sometimes this system is referred to as "hydraulic rodless pumping", but in the strictest sense this is untrue because there is always a rod connection the engine and pump pistons. However, sucker rods are not required in this mechanical reciprocating pump, which may have contributed to this system being termed "rodless". It is very difficult to compare one pumping method with another unless the comparison is restricted to specific applications.