FIELD: oil production, particularly surface sealing or packing boreholes or wells.
SUBSTANCE: tubing includes water conduit with check valve, which permits liquid passage in injection well, production string lowered in injection well and hydraulically communicated with water conduit through distribution means. Check valve of water conduit is provided with bypass pipeline in injection well head area. The bypass pipeline includes check valve, which permits liquid passage from injection well, and liquid flow regulator. The liquid flow regulator is plate-like fitting having gage orifices. Gage orifice sizes provide liquid flow velocity less that that of particulate contaminant transportation from bottomhole formation zone and lifting thereof to injection well head. Water conduit section provided with check valve and bypass pipeline is covered with heating material and is fitted with discharge pipes and gates, which close water conduit section and bypass line from both sides thereof.
EFFECT: increased efficiency.
1 dwg
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