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1.发明公开
公开(公告)号：EP3411668A1
公开(公告)日：2018-12-12
申请号：EP17706552.1
申请日：2017-01-20
发明人： PIONETTI, François-Régis , AGOUMI, Jalil , SUNDERMANN, Axel , MARAVAL, Damien , LAMOUR, Vincent
CPC分类号： G01D5/35364 , E21B17/01 , E21B41/0007 , E21B47/0006 , G01D5/353 , G01H9/004 , G01K11/32 , G01K2011/322 , G01K2011/324 , G01N25/18
摘要： The invention relates to a method for monitoring the thermomechanical behaviour of a subsea pipe (2) carrying pressurised fluids and produced by assembling unitary pipe elements (4), the method comprising a step of determining a mechanical signature specific to each unitary pipe element, consisting in using a measuring cable (16) provided with a fibre optic sensor using Brillouin backscattering to measure the deformations in each unitary pipe element when it is subjected, while ashore, to different mechanical stresses of predetermined directions and intensities, and to establish a stiffness matrix associated with the mechanical signature of each unitary pipe element; a step of determining a thermal signature specific to each unitary pipe element by measuring the temperature changes in said unitary pipe element when it is subjected, while ashore, to different electrical heating power values, and establishing a thermal transfer function associated with said thermal signature of each unitary pipe element; and a monitoring step consisting in recovering the variations of the optical signal injected in the sensors when the pipe is in service, and determining the changes in the mechanical and thermal signatures of each unitary pipe element.
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公开(公告)号：EP3411668B1
公开(公告)日：2020-03-04
申请号：EP17706552.1
申请日：2017-01-20
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公开(公告)号：EP3411669A1
公开(公告)日：2018-12-12
申请号：EP17706554.7
申请日：2017-01-20
发明人： PIONETTI, François-Régis , AGOUMI, Jalil , SUNDERMANN, Axel , PARIS, Jean-Baptiste , LAMOUR, Vincent
IPC分类号： G01D5/353
CPC分类号： G01D5/35364
摘要： The invention relates to a method for monitoring the mechanical behaviour of an subsea pipe (2) carrying pressurised fluids and produced by assembling unitary pipe elements (4), the method comprising a mechanical calibration step that consists in using a measuring cable provided with an optical fibre sensor to measure the deformations in each unitary pipe element when subjected, while ashore, to different mechanical stresses of predetermined directions and intensities, and, on the basis of these measurements, establishing the mechanical signature of each unitary pipe element; and a monitoring step consisting in using a measuring cable (18) provided with a fibre optic sensor using Brillouin backscattering and positioned in the shape of a helix with a constant pitch (p) on each unitary pipe element, the direction of the pitch of the helix alternating in two adjacent unitary pipe elements, to recover the variations of the optical signal injected in the sensors when the pipe is in service, and, from the variations of the signal and the mechanical signature of each unitary pipe element, determining the stresses that each unitary pipe element is subjected to.
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