DEVICE FOR INJECTION OF FLUID FROM BOTTOM WATER PRODUCING FORMATION OF HOLE IN UPPER PETROLIFEROUS FORMATION Russian patent published in 2008 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to engineering and technology of a cyclic injection of fluid from water producing formation in a petroliferous formation at its water flooding. It provides simplification of device construction with simultaneous efficiency upgrading of its operating and reduction of expenditures of the consumable electric power. Essence of invention: device contains a pipe string with a packer installed between aquiferous and petroliferous formations. In structure of a pipe string the ram pump is installed consisting of the cylinder piston with end-to-end longitudinal channels and the flap, thus the cylinder piston rigidly connected to a rod string. The packer is executed in the form of the resilient sleeve gasket which is drawn in from below by a perforated liner at its bearing on a bottom hole. The perforated liner is put outside telescopically on a bottom of a pipe string with possibility of the bounded movement upwards. The room of a pipe string below a ram pump is connected with water producing formation through openings of a perforated liner and annulus room of a pipe string below a packer. The annulus room of a pipe string above a packer is connected with a petroliferous formation and with room of a pipe string above a ram pump by means of through holes, and annulus room of a pipe string above a packer. A pipe string with ram pump of pump rods have hermetic sealing possibility on a hole mouth.

EFFECT: simplification of device construction of fluid pumping-over with simultaneous efficiency upgrading of its operating and reduction of expenditures of the consumable electric power.

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