OIL WELL PUMPING UNIT FOR SIMULTANEOUS SEPARATE OPERATION OF TWO RESERVOIRS Russian patent published in 2010 - IPC E21B43/14 F04B47/00 

FIELD: oil and gas production.

SUBSTANCE: oil well pumping unit for simultaneous separate operation of two reservoirs comprises flow column, cable, packer installed between reservoirs, by-pass, upper jacket-enclosed pump - plunger one with stem, and lower pump communicated with below-packer space, electric submersible one, with electric motor, for pumping of products from appropriate reservoirs, unit of cable sealing. Discharge of electric submersible pump is communicated by nozzle to upper jacket, which is on top communicated to flow column and is equipped with side channel, communicating intake of upper pump to above-packer space. Nozzle communicating discharge of lower pump to flow column is equipped with additional check valve. Plunger pump is arranged as insert with the possibility of tight interaction with inner surface of process nozzle of upper jacket. Pressure of packer fit is less than the rated one for controlled valves of check valve.

EFFECT: feature of alternate pumps operation, possibility to use insert plunger pump, elimination of liquid leak in process of pumps lifting, possibility to pump reagents into lower reservoir and flushing of tube side below packer without withdrawal of plant from well.

2 dwg