FIELD: oil production, particularly to flood formations and to keep formation pressure during oil field development.
SUBSTANCE: water conduit is provided with check valve at head zone of injection well having low intake capacity. The check valve directs water flow from water conduit to the well having low intake capacity. The check valve is surrounded with bypass in which filter and check valve are inserted. The bypass check valve directs flow from the well having low intake capacity to the filter. Bypass part between the check valve and the filter has contaminant removal pipeline.
EFFECT: reduced losses of intake well capacity, increased time between injection well bottom zone cleaning operations and, as a result, reduced costs of formation pressure keeping.
1 dwg, 1 ex
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