Patent ID: 6123114
Filing Date: 2000-09-26
Classification: E21B,F16L

Abstract:
A flexible pipe of the unbonded type comprising, from the radial inside outward:an internal leak proof assembly comprising an internal carcass, a pressure vault around the carcass, a first inner group of tensile armor being wound at a lay angle of less than 55.degree. around the pressure vault, an intermediate sealing sheath around the first inner group of tensile armor, a second outer group of tensile armor also being wound at a lay angle of less than 55.degree. and the intermediate sealing sheath is between the inner and the outer groups of tensile armor;each of the first inner and second outer groups of tensile armor comprises at least two layers of reinforcements wound in opposite directions;and the respective lay angles of the first inner and the second outer groups of tensile armor differ from each other by more than 5.degree.;and an external sealing sheath around the second outer group of tensile armor.