SUBMERSIBLE STRICTION PUMPING PLANT Russian patent published in 2021 - IPC F04B47/06 F04B17/00 

FIELD: oil industry.

SUBSTANCE: invention relates to pumping plants; it can be used for pumping liquids from wells. A submersible striction pumping plant consists of a single case and a plunger-type pump, a tubular-type bellows tread, a striction engine of a linear stepper-type, and a tubular-type bellows compensator located in the case. A plunger is located in the rear hole of a pump part of the single case. The plunger is made with the possibility of progressive movement along the longitudinal axis, the front hole of the tread is hermetically sealed with the rear part of the plunger. The rear part of the plunger is connected to the front part of a rod. The tread along the perimeter of its rear hole is hermetically connected to the tread part of the single case. The structure of the striction engine of the pumping plant includes a slider consisting of sequentially connected rear spacer, running and front spacer sections. There are striction actuators in sections. The slider is located inside the engine and is connected to the rod. The compensator is hermetically connected to a compensator part of the single case. The rear hole of the compensator is hermetically sealed with a lid. A cavity formed by internal volumes of the tread, engine and compensator is filled with coolant. A through hole is made in each actuator. A cooling pump is located on the rear spacer section of the slider, which is connected in series with through holes of the actuator in sections. A transverse hole is made in the front part of the rod, connecting the through hole of the rod with the inner cavity of the tread. Inside the compensator, along the longitudinal axis, there is a tube fixed to the slider and hermetically connected to the cooling pump. The rear end of the tube is open into the inner cavity of the compensator.

EFFECT: invention is aimed at reducing the probability of repair due to overheating and failure of striction actuators of the engine of the submersible pumping plant during the pumping of liquid and, as a result, increasing the reliability of its operation.

3 cl, 8 dwg