Schlumberger Technology Corporation

Onesubsea IP UK Limited

Damon Richard Roberts

Rogerio Tadeu Ramos

Russell Smith

Stephane Vannuffelen

Masafumi Fukuhara

Vincent Alliot

Ian Peirce

Yamid Pico

Peter Coupe

Dmitry Belov

Lars Mangal

Evgeniya Myalo Deger

Ian Pierce

Lenny Sutherland

Azedine Kacher

A terminal end-attachment device () for a flexible pipe () comprising an attachment body () adapted to receive a terminal end of a flexible pipe () and to couple the said flexible pipe to a hydrocarbon production installation structure. The device () further comprising a strain sensor () coupled to a sensor carrier (), at least part of the sensor carrier () and the strain sensor () being at least partially incorporated within the attachment body (). A method of manufacturing a terminal end-attachment device () for a flexible pipe () is also provided.

Flexible pipe terminal end-attachment device

A flexible pipe fatigue monitoring systemcomprising a pipe monitoring systemadapted to be provided on a flexible pipehaving a bend stiffener. The pipe monitoring systemis provided on the pipebelow the bend stiffener. The monitoring systemmeasures one or more of bending, tension and torsion of the pipe. The pipe monitoring systemcomprises sensor carrier membersadapted to be coupled to the pipeand at least one fiber Bragg grating strain sensor embedded in a carrier member. An inclinometeris provided on one carrier memberto measure the incline of the piperelative to earth. A central processoris provided to receive bending, tension and torsion information and incline information, and is operable to determine pipe fatigue from said information. A method of flexible pipe fatigue monitoring is also provided.

Flexible pipe fatigue monitoring below the bend stiffener of a flexible riser

A system and method are provided for determining wall thickness of a structure such as a metallic pressurized pipe. The system includes an optical fiber having a plurality of Fiber Bragg Gratings (FBGs), and a mounting for securing the FBGs over discrete portions of the exterior surface of the pipe such that strain in the pressurized pipe wall is transmitted to the FBGs. The system further includes a light source and a light sensor coupled to an end of the optical fiber. The light sensor converts light reflected back from the FBGs into electrical signals that a digital processor converts into strain measurements. The FBGs are mounted around portions of the pipe expected to have significant metal loss as well as portions of the pipe expected to have negligible metal loss. The method includes at least one of comparing relative strains at locations with negligible metal loss to those with significant metal loss to accurately determine the thickness of the wall with metal loss; compensating for temperature effects by considering relative strains at areas of the pipe with and without metal loss; and measuring axial strain on the pipe with one or more of the FBGs to correct for at least one of bending and torsion effects on hoop strain.

System and method for uniform and localized wall thickness measurement using fiber optic sensors

A system and method for monitoring bending curvature of a flexible pipe structure, including at least one conduit configured to conform to a profile of a bend stiffener of a flexible pipe structure, and the at least one conduit including one or more sensors, wherein each sensor is configured for measuring a bending curvature of the bend stiffener.

System and method for monitoring bending of a flexible riser

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Hampshire, United Kingdom

Damon Richard Roberts