FIELD: oil and gas production.
SUBSTANCE: valves' unit is lowered into borehole of well with multitude of intervals. Also, each valve is actuated by dumping a valve actuating object into a corresponding valve. The valves are driven into an open state successively and in a set order. Upon converting corresponding valves into open state intervals are successively tested.
EFFECT: raised reliability of system and device and raised efficiency of procedure.
31 cl, 3 dwg
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