Patent ID: 8091588
Filing Date: 2012-01-10
Classification: F16L

Abstract:
1. A metallic tubular structure having a multi-layer, strength-enhanced first end segment, a multi-layer, strength-enhanced second end segment, and a flexible segment intermediate said multi-layer, strength-enhanced first end segment and said multi-layer, strength-enhanced second end segment, said metallic tubular structure comprising: a first inner metallic tubular member having an inner surface and an outer surface, said inner surface providing a passage for conveying fluid therethrough, said first inner metallic tubular member longitudinally extending the entire length of said metallic tubular structure, wherein said first inner metallic tubular member is formed from one or more metallic layers; a second metallic tubular member circumferentially disposed on said outer surface at a first end of said first inner metallic tubular member, said second metallic tubular member longitudinally extending a predetermined distance on said first inner metallic tubular member forming said multi-layer, strength-enhanced first end segment thereat; and a third metallic tubular member circumferentially disposed on said outer surface at a second end of said first inner metallic tubular member, said third metallic tubular member longitudinally extending a predetermined distance on said first inner metallic tubular member forming said multi-layer, strength-enhanced second end segment thereat, wherein said second metallic tubular member and said third metallic tubular member are spaced apart on said first inner metallic tubular member such that said second metallic tubular member and said third metallic tubular member are not contiguous with one another.