FIELD: oil and gas industry.
SUBSTANCE: method involves use of the main pipe perforated only in certain sections under each filter assembly. Inlet flow enters through external protective casing the introduction of which is optional and passes through filter material to annular space between filter material and continuous section of the main pipe. After the flow is moved in longitudinal direction in annular space on the way formed outside the continuous main pipe, it shall pass through the throttling section preferably containing porous medium. After the flow passes through porous medium in certain section of filter, it can enter the main pipe through the holes. In preferable version the enveloping ring protects porous medium when it is lowered to the well and expanded and it can also optionally create additional resistance to the flow by interacting with porous medium. Other throttling methods of the flow are also provided instead of porous medium.
EFFECT: increasing the efficiency of the method.
19 cl, 4 dwg
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