FIELD: oil-and gas industry.
SUBSTANCE: for method execution at first descent insulation sleeve of a smaller diametre into the well and insulate with it a bottom lateral hole. Then descend insulate a bigger diametre sleeve and insulate with it a top lateral hole, after descend a blind plug, shut a main hole with it and fill pipes and a hole clearance with a non-freezing liquid through a circulation valve. Then install a screw plugs in lateral branches of a Christmas tree fittings and a return valve in a Christmas tree fittings case, seal branches with blind valves.
EFFECT: invention allows shutting the main and lateral multihole wells holes with a fittings at its conservation period, avoid reservoir contamination, decrease conservation and the following de-conservation time consumption.
1 dwg
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