Single-progressive cavity pump driven on the ground is increasingly becoming more important production equipment. It includes the driving equipment productions on the ground, down hole progressive cavity pump and the accessory tools. As a volumetric pump, it is simple in structure, stable in pumping fluid, small in hydraulic loss, applicable to wells of dense oil with sand and wells high oil/gas rate, without gas locking, low in power consumption, small in investment and easy in maintenance ect. Pumps with head number ratio of 1:2 and 2:3 for the stator and rotor and multi-speed adjustable driving device can be supplied, which can meet the different demands of the users.
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