WELL FLUID FILTER Russian patent published in 2016 - IPC E21B43/08 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used for cleaning fluid in well bore from floating debris and suspended particles. Well fluid filter comprises slotted pipe, mesh, sealer tube space of well and coupling. Slotted pipe above slits is closed by plug. Filter comprises housing and cylindrical bottom, mesh is placed around part of slotted pipe with slots at distance from slotted connection pipe. Bottom mesh rests on cylindrical bottom, on top of space between mesh and slotted pipe is closed by partition. Space between mesh and housing top is open, and at bottom is covered by cylindrical bottom. 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 knees, coupling is placed in upper part of slotted pipe. Sealer of annular space of well is placed on outer part of cylindrical bottom, ratio of width of slots of branch pipe to mesh width is equal to (3.5-5):(0.7-3.0).

EFFECT: high efficiency of cleaning borehole fluid.

1 cl, 1 dwg