Patent ID: 7891384

Claim:
A flexible tubular pipe intended for transporting gaseous hydrocarbons in an offshore oil production field, the pipe being of the unbonded smooth-bore type, the pipe comprising at least, from the inside outward, a smooth-walled internal polymeric tube, a pressure vault formed by a short-pitch winding of at least one wire, a first, inner pair of crossed tensile armor plies wound with a helix angle equal to or less than 35°, a polymeric intermediate sheath, and a second, outer pair of crossed tensile armor plies wound with a helix angle approximately equal to 55°; and the pipe further comprising an annular space lying between the internal polymeric tube and the polymeric intermediate sheath, a monitor of the sealing of the internal polymeric tube, the monitor being configured to compare a first pressure inside the pipe and a second pressure within the annular space.