SUCKER ROD PLUG-IN PUMP Russian patent published in 2019 - IPC F04B47/00 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in production of hydrocarbon material from wells with arrangement of sucker rod pump in borehole from vertical to 110°. Said sucker rod plug-in pump comprises casing with top and bottom couplings-centralizers. Lower coupling-centralizer has channels for gas outlet into annular space, self-installing intake and delivery valve assemblies, plunger, cylinder, plunger rod, lock support, a plunger adapter, a rod adapter, a reducer-centraliser mounted above the stem adapter with longitudinal splines on the outer part.

EFFECT: higher operational reliability of the downhole pump, ruled out connection of the pump rod and the first rod of the rod string, increased coefficient of filling and pump supply, reduced effect of gas factor on operation of valves.

1 cl, 3 dwg