FIELD: gas-oil industry branch, possibly mounting corrosion resistant casings in oil, gas, water-supply and water-absorption wells. SUBSTANCE: casing includes metallic base whose outer surface is covered with glass-enamel coating. Glass -enamel coating is also applied onto inner surface of metallic base. Glass-enamel coating applied onto outer and inner surfaces is reinforced with alumina fibers for providing shock resistance. Upper portion of casing with internal thread is in the form of elongated upset part with cone generatrix inclined by 15 - 20 degrees relative to generatrix of cylindrical portion of tube. EFFECT: increased useful life period of casing. 3 cl, 1 dwg
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