Saipem S.a.

Cementys

Sateba Systeme Vagneux

Vincent Lamour

François-Régis Pionetti

Axel Sundermann

Jalil Agoumi

Vincent Lanticq

Jean-Baptiste Paris

Damien Maraval

Arnaud Loaec

A method of monitoring mechanical behavior of an undersea pipe () transporting fluid under pressure and made by assembling a plurality of unit pipe elements (). A calibration step is performed consisting of using a measurement cable having an optical fiber sensor to measure deformations experienced by each pipe element while it is subjected on land to various mechanical stresses in predetermined directions and magnitudes, and, on the basis of the measurements, establishing the mechanical signature of each pipe element. A monitoring step is performed consisting of using a measurement cable () having an optical fiber sensor that makes uses Brillouin backscattering and is helically positioned at constant pitch (p) on each pipe element with the handedness of the helical pitch alternating for two adjacent pipe elements to recover variations in optical signal injected into the sensors while the pipe is in service.

Method and device for monitoring the mechanical behaviour of a subsea pipe for transporting pressurized fluids

A method of monitoring thermomechanical behavior of an undersea pipe () transporting fluid under pressure and made by assembling unit pipe elements (), comprising determining a mechanical signature specific to each unit pipe element, using a measurement cable () having an optical fiber sensor using Brillouin backscattering to measure deformation of the pipe element while it is subjected on land to various mechanical stresses in predetermined directions and magnitudes, and establishing a stiffness matrix associated with the mechanical signature of each pipe element, a step of determining a thermal signature specific to each unit pipe element, which step consists in measuring the temperature changes of the unit pipe element while it is being subjected on land to various different electrical heating powers, and in establishing a thermal transfer function associated with the thermal signature of each pipe element, and a monitoring step consisting of recovering.

Method for monitoring the thermomechanical behaviour of a subsea pipe for transporting pressurised fluids

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Paris, France

Vincent Lamour