FIELD: methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells.
SUBSTANCE: system comprises casing pipe, arranged inside well and retained therein with the use of cement, a number of valves communicated with casing pipes and adapted to control communication between casing pipe and well zone. The valves have filters, which may be moved in the first, filtering, position, where filter is aligned with at least one valve orifice and in the second position, where filter is out of register with the valve orifice. Also described are valve actuation mechanisms, which activates one or several valves, namely rod, drop ball, tool to be lowered in well and activation system on the base of control lines.
EFFECT: increased system reliability and method efficiency.
33 cl, 33 dwg
