FIELD: mechanical engineering. SUBSTANCE: automatic flying scraper comprises casing with sealing and cleaning members and a cylindrical rod passing through said casing and provided with a bulge in the bottom part. The upper part of cylindrical rod is secured in fishing head. A tubular rod is installed concentrically with the bulge of the cylindrical rod. Casing cavity is closed by a system of links when a preset hydrostatic pressure is reached, said pressure compressing the air in the air chamber through main and additional pistons. EFFECT: improved design. 2 dwg
