WELL STRAINER AND METHOD OF ITS MANUFACTURE Russian patent published in 2000 - IPC

FIELD: mining industry; applicable in well production of liquid and gaseous minerals and in filtration of liquid and gaseous agents in other industries. SUBSTANCE: well strainer has filtering sections. Each filtering section includes filtering jacket provided with end rings on its ends. Filtering jacket is made of transverse fastening strips and longitudinal rods rigidly connected to end rings. Diameter of end rings is larger than that of filtering jacket by value determined by the formula given in the invention description. Longitudinal rods forming filtering jacket are made of erosion and corrosion resistant materials or coated with these materials. Filtering jacket is made by laying of reinforced rods to under strips perpendicular to their long sides and rigidly connected, for instance, by welding to strips. Fabricated structure is bent with its strips inward to form cylindrical surface whose axis is parallel to rod axes. Strip ends are connected with one another and rod ends are connected with end rings. Invention provides fro manufacture of strainers for wells including crooked ones, possibility of control over quality of manufacture. EFFECT: higher efficiency and improved erosion and corrosion resistance of well strainer. 3 cl, 6 dwg