FIELD: oil and gas industry.
SUBSTANCE: invention can be used for cleaning fluid in well bore from floating debris and suspended particles. Device includes a slotted pipe, screen, valve, sealing device of annular space of well, coupling, housing and cylindrical bottom. Screen is arranged around part of slotted pipe with slots. Slotted pipe and housing are mounted by lower parts respectively inside and outside cylindrical bottom. Slotted pipe is arranged inside housing and is connected in upper part above slots with housing by struts. Valve used is a plate-type valve. Valve and coupling are arranged in upper part of slotted pipe. Sealing device of annular space of well is placed on outer part of cylindrical bottom. Ratio of width of slots of pipe to with of screen is equal to (3.5-5):(0.7-3.5).
EFFECT: higher efficiency of cleaning well fluid.
1 cl, 1 dwg
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