wires 16 a and 16 b have a circular cross section and are wound at a relatively high lay angle to provide significant hoop strength and axial strength preferably at least a portion of the wires 16 a and 16 b are formed by carbon steel with a plastic or anodic coating it is noted that the layer 14 prevents the expansion of the sheath 12 into gaps formed between the wires of the tensile layers 16 a and 16 b one or more layers of a tape 18 are helically wrapped over the wire assembly 16 the tape 18 can be formed by plastic or metal and can be reinforced with glass metal or a different type of plastic although not shown in the drawings it is understood that the tape 18 can also extend between the layer 14 and the wire assembly 16 and between the series of wires 16 a and 16 b a protective insulative sheath 20 extends over the tape 18 and can be formed of a foamed or blown polymer a layer 24 is wrapped around the sheath 20 and provides additional resistance to hydrostatic collapse and crush the layer 24 is preferably formed by a plurality of helically wrapped corrugated and or interlocked strips to provide additional collapse and radial compression resistance as also disclosed in the above identified application an outer protective sheath 26 extends over the layer 24 and is preferably extruded over the layer 24 in a conventional manner it is understood that the thickness of the layer 24 and the structural strength of the sheath 20 can vary.