FIELD: oil and gas industry.
SUBSTANCE: group of inventions is related to underground hydrocarbon inflow stimulation and more specifically to devices improving reliability of point stimulation. Essence of inventions: the invention envisaged pumping of liquid through a stimulator, bypassing of at least a part of the liquid through the stimulator, bypassing of at least a part of the liquid from the stimulator to an anchor unit connected to it so that they can communicate. At that the anchor unit includes housing with a movable former and a one-way restrictor movable inside the former. The one-way restrictor inside the former can be placed to the first position in which the restrictor passes a limited amount of the liquid through the housing. The liquid can be also introduced from the anchor unit in order to install a sand plug at the predefined position and to divert the liquid flow in this position by means of a sand plug.
EFFECT: higher efficiency of stimulation and operating reliability of the devices.
19 cl, 4 dwg
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