PUMPING PLANT Russian patent published in 2014 - IPC F04B47/08 

FIELD: machine building.

SUBSTANCE: pumping plant comprises a drive, a plunger pump with reciprocating travelling of the plunger due to longitudinal elastic deformation of a hollow rod. The upper rod end is fixed on the head of a well and a cylinder is fixed on a casing string by a packer. The plunger and the drive are connected by mechanical link providing for longitudinal elastic deformation of the rod.

EFFECT: reduction of the rod stress, increase of the head and provision for operability of pumping plants in case there is large amount of gas in the borehole fluid.

4 dwg