The PC pump is also named progressive cavity pump, it consists of a stator and a rotor, the helical interference of the both parts forms a series of continuous sealed cavities, and the medium transmission is then realized through the rotor rotational movement.
PCP Down-hole Pump is to connect the stator and rotor respectively to the ends of the oil tube and the sucker rod, the drive head on ground can drive the rotor through the sucker rod and the down-hole liquid can then be lifted to the ground.
● Lower early investment
Compared with electric submersible pump, hydraulic piston pump and beam-pumping unit, PCP Down-hole pump's first investment is smaller.
● Higher efficiency, energy saving and lower maintenance
The load of PCP Down-hole pump is stable during operation, the mechanical loss is less, and the pump efficiency can reach 45%-65% and the highest can reach 70%, but that of the plunger-type pumping unit is only about 30%.
● Compact structure
It is small in volume and the transportation cost is lower; its surface installation is simple and the area occupied is small, it is easy in installation and maintenance.
● It is suitable for thickened oil convey
PCP down-hole pump is suitable for conveying crude oil with the viscosity under 8000mPa.s, therefore, most heavy oil well can use this pump.
● It is suitable for oil wells with high sand content
Because of the good yield ability of the stator rubber, it can be applied in high sand content oil wells.
● It is suitable for high gas content oil wells
The gas locking PCP down-hole pump cannot occur, thus it is suitable for oil-gas mixing conveyance, but the free gas at the entry of the PCP down-hole pump can affect its volume efficiency.
● It is suitable for cluster well group and horizontal well of offshore oil fields
This pump can be lowered down to the deviated well section, and the equipment is simple in structure, small area occupied, less cost in transportation and maintenance, therefore, it is suitable for offshore oil production.
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