OIL WELL PUMP Russian patent published in 2018 - IPC F04B47/00 F04B53/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of the oil industry and is intended for oil production from wells. Pump contains a hollow plunger with a discharge valve, a cylinder with a suction valve at the bottom and a collar in the middle part. On the collar there are sealing rings that are engaged with the side wall of the plunger. Between the side walls of the cylinder and the plunger there is a cylindrical spring, wound from the strip. It rests with its lower end against the collar of the cylinder and wraps, with its coils, the outer side of the plunger. Outer edges of the coils of the spring abut against the inner wall of the cylinder, and the wide walls of the turns are inclined upwards. Spring coils adjoin each other with wide walls, the inner thin walls of the coils being cylindrical. Internal diameter of the spring is selected to be less than the outer diameter of the plunger. Plunger is fitted with a plate-shaped ring made in the form of a conical washer and located with the convex part at the top. Plate-shaped ring rests against the upper coil of the spring. Opposite to this ring, radial cylindrical samples provided with an engraving washer are made from the outer side wall of the cylinder. From the bottom of each cylindrical sample, a radial threaded sample is made, into which the adjusting screw is screwed in. Adjusting screw passes through the engraving washer and is made with a cylindrical head and with a conical end engaged with the upper conical wall of the plate ring.

EFFECT: simplification of design and increase in efficiency.

1 cl, 3 dwg