FILTER WITH RADIAL FLOW OF FLUID MEDIUM FOR UNDERGROUND WELL AND METHOD FOR ITS MANUFACTURE Russian patent published in 2000 - IPC

FIELD: performing function of inlet filter in underground wells for fluid media (oil, gas, water). SUBSTANCE: proposed method consists in preparation of section of pipe with large number of perforations which is used as part of production pipe of well. Pipe is placed in engine lathe and perforated section is located between headstock and tailstock of lathe. During rotation of pipe, strip made from metal wool (steel wool) is wound around pipe in repeated layers laid one on another; each layer is located at angle X relative to axis of pipe; adjacent layers are shifted relative to one another at angle 2X. Ready filter has tubular wire screen located between inner layer made from steel wool and envelope with large number of perforations above outer layer of wool. EFFECT: modified, simplified and low-cost method of manufacture of filter; enhanced durability. 14 cl, 5 dwg