DISTRIBUTED FIBRE OPTIC DIAGNOSIS OF RISER INTEGRITY
First Claim
1. A subsea riser integrity diagnosis system, comprising:
- one or more optical fibres deployed along at least a portion of a riser;
a fibre optic sensor interrogation apparatus optically coupled to the one or more optical fibres and operable to detect at least one of temperature, vibration, and strain; and
a central processor means adapted to receive measurement data from the fibre optic sensor interrogation apparatus and operable to determine from the received data a status of at least one of temperature, vibration, and strain along at least a portion of the riser, and to determine if the status is within a predetermined safe limit or whether a potentially damaging event has occurred and to inform an operator of a possible action to be taken to safeguard riser integrity.
1 Assignment
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Accused Products
Abstract
A subsea riser integrity diagnosis system comprising: one or more fibres deployed along a riser, preferably along the whole length subject to any potential failure, or alternatively deployed over the interval most subject to failure, a fibre optic sensor interrogation apparatus optically coupled to the fibre(s) and operable to detect changes in temperature (DTS), vibration (CRN), or strain (FBG) sensed by the fibre optic strain sensor, and a central processor means adapted to receive multiple measurement data from the interrogation apparatus and operable to determine from the received data the current status of temperature, pressure, vibration, strain or other parameters along the riser and to determine if the status is within safe limits or whether any number of potentially damaging events has occurred and to inform the operator(s) for possible action to be taken to safeguard the integrity of the riser.
17 Citations
17 Claims
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1. A subsea riser integrity diagnosis system, comprising:
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one or more optical fibres deployed along at least a portion of a riser; a fibre optic sensor interrogation apparatus optically coupled to the one or more optical fibres and operable to detect at least one of temperature, vibration, and strain; and a central processor means adapted to receive measurement data from the fibre optic sensor interrogation apparatus and operable to determine from the received data a status of at least one of temperature, vibration, and strain along at least a portion of the riser, and to determine if the status is within a predetermined safe limit or whether a potentially damaging event has occurred and to inform an operator of a possible action to be taken to safeguard riser integrity. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 14, 15, 16)
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6. (canceled)
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13. (canceled)
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17. A method for informing an operator of a possible action to be taken to safeguard the integrity of a riser, the method comprising the steps of:
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deploying one or more optical fibres along at least a portion of a riser; positioning a fibre optic sensor interrogation apparatus optically coupled to the one or more optical fibres and operable to detect at least one of temperature, vibration, and strain; and providing a central processor means adapted to receive measurement data from the fibre optic sensor interrogation apparatus and operable to determine from the received data a status of at least one of temperature, vibration, and strain alone at least a portion of the riser, and to determine if the status is within a predetermined safe limit or whether a potentially damaging event has occurred and to inform an operator of a possible action to be taken to safeguard riser integrity.
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Specification