SUCKER ROD PUMP FOR OPERATION IN CONDITIONS COMPLICATED BY FORMATION OF DEPOSITS Russian patent published in 2023 - IPC E21B43/00 E21B43/22 F04B47/04 

FIELD: oil industry.

SUBSTANCE: invention is intended for oil production by installing a sucker rod pump, in particular in conditions complicated by the formation of deposits, such as salts and asphaltene-paraffin deposits, in the valves of the sucker rod pump. The sucker rod pump for operation in conditions complicated by the formation of deposits consists of a rod pump, casing with sealed cavity filled with reagent, and the reagent supply mechanism. A sucker rod pump is driven by a drive through a string of sucker rods and comprises a cylinder, a suction valve, a hollow plunger and a discharge valve. The reagent supply mechanism is hydraulically connected to the cavity of the rod pump cylinder. The casing body is concentrically installed on the outer surfaces of the lower tubing and the cylinder of the sucker rod pump connected through a coupling to the lower tubing. The outer surfaces of the lower tubing and the rod pump cylinder are the inner surface of the casing, in which a side hole is made in the lower part. The upper part of the casing is equipped with a bypass valve. A separator made of a rubber cuff in the shape of a washer is installed in the sealed cavity of the casing. The rod pump plunger has a length that ensures that the side hole is blocked during running in and is equipped with an automatic coupler with the ability to connect to the sucker rod string, the outer surface of the lower tubing is polished.

EFFECT: increased reliability and efficiency of operation of the sucker rod pump in conditions complicated by the formation of deposits.

1 cl, 2 dwg