DEVICE FOR LIQUID INJECTION IN ONE WELL RESERVOIR AND OIL PRODUCTION FROM ANOTHER ONE Russian patent published in 2008 - IPC E21B43/14 

FIELD: oil production, particularly obtaining from a multiple-zone well.

SUBSTANCE: device comprises pipe string with packer installed between water-bearing and oil-bearing reservoirs. Pipe string over upper oil-bearing reservoir has self-sealing packer blocking flow of liquid to be injected in water-bearing reservoir in top-down direction. Inner air-tight partition is installed between packer and self-sealing packer. Submersible plunger pump is concentrically arranged over the partition inside pipe string. The plunger pump comprises piston with through longitudinal channels and valve. Piston is rigidly connected with sucker rod string. Pipe string interior defined between pump and partition is communicated with water-bearing reservoir through radial orifice made in self-sealing packer body and pipe string. Pipe string interior defined over submersible plunder pump is communicated with discharge line of well. Casing string-borehole annulus section over self-sealing packer is communicated with lower water-bearing reservoir through annular channel created between pipe string and self-sealing packer, as well as through radial channel formed in pipe string below partition and pipe string interior below partition and through orifices made in perforated liner. Packer is made as elastic collar pressed with perforated liner from below as it rests upon well bottom. Perforated liner is telescopically put on lower part of pipe string so that it may perform limited upward sliding.

EFFECT: simplified device structure and increased pump operational efficiency along with extended functional capabilities of the device due to product taking from one reservoir and simultaneously liquid injection in another reservoir.

1 dwg