FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil and gas industry and can be used during the producing of oil and gas. Combined well screen includes load-carrying framework, implemented of perforated pipe and slotted filter element, implemented of wire spiral winded on side-member. Under side-members it is installed reticulate filter element in the form at least one strainer basket, fixed by fixing spiral winded wire. Between strainer basket and perforated pipe it is installed drainage layer, implemented of spiral winded wire. Additionally wire winding in drainage layer differs by direction from winding of fixing wire.
EFFECT: increasing of discharge capacity and quality of cleaning of liquids and gas, arrived to filtration and life time increasing of well screen.
6 cl, 7 dwg
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