SUCKER-ROD PUMP Russian patent published in 2025 - IPC F04B47/02 

FIELD: oil industry; pumps.

SUBSTANCE: invention relates to oil industry, in particular, to sucker-rod pumps for operation in conditions of high gas factor and presence of mechanical impurities in produced product of wells with small sump. Pump is made with possibility of connection to tubing string and includes cylinder 1 with suction valve 2 and hollow cylindrical casing 6 with metal mesh filters 7, 8, plunger 3 with delivery valve 4. Casing 6 is made with an open upper part. Upper and lower filters 7, 8 are made in the form of a truncated cone of metal wire, the larger base of which is metal ring 10, fixed in casing 6 by limiting screws 11, 11/, smaller base is a sealing rubber ring 9, 9/, coupled with cylinder 1. Ring 9/ of filter 8 is installed on annular limiter 12 connected to cylinder 1 by means of a threaded connection. Truncated cone of filter 7 is directed with its top to the wellhead. Truncated cone of filter 8 has its top to the bottomhole. Filter 7 is made in the form of a coarse filter, and filter 8 is a fine one.

EFFECT: invention is aimed at improvement of efficiency and reliability of sucker-rod pump.

1 cl, 1 dwg