FIELD: oil and gas production industry. SUBSTANCE: device has pump-compression pipes with filter and packer with piston plugs located in them. Pipes have perforation openings located at boundary between upper and lower piston plugs. Located on pump-compression pipes in zone of perforation openings is coaxial chamber. Arranged above packer is flushing passage, and installed under filter is deep well pressure gauge. EFFECT: high efficiency. 1 dwg
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