公开(公告)号：US20180231149A1

公开(公告)日：2018-08-16

申请号：US15751246

申请日：2016-08-05

Applicant: National Oilwell Varco Denmark I/S

Inventor： Kristian Glejbol ,  Michael Eilersen ,  Anders Straarup ,  Christian Ditlev Cappeln

IPC: F16L11/08 ,  F16L11/127 ,  F16L53/37 ,  G01K1/14 ,  G01K11/32

CPC classification number: F16L11/082 ,  F16L11/127 ,  F16L53/37 ,  G01K1/14 ,  G01K11/32 ,  G01M3/002 ,  G01M3/38 ,  G01M5/0025

Abstract: The present invention relates to a method of testing an unbonded flexible pipe. The unbonded flexible pipe has a length and a longitudinal axis and comprises, from the inside and out, an internal armour layer, an internal pressure sheath, at least one external amour layer and an outer sheath. At least one of the layers comprises an optical sensor connected to an optical monitoring system and at least one of the armour layers is a metallic and electrically conductive amour layer. The method makes it possible to test an electrical heating system and an optical sensor substantially simultaneously.

公开(公告)号：US11092264B2

公开(公告)日：2021-08-17

申请号：US16320633

申请日：2017-07-05

Applicant: National Oilwell Varco Denmark I/S

Inventor： Bo Asp Moller Andersen ,  Michael Eilersen ,  Nicky Weppenaar

IPC: B63B27/24 ,  F16L11/127 ,  F16L11/08 ,  F16L27/08 ,  F16L33/01 ,  G01M5/00 ,  G01L1/24 ,  F16L11/12 ,  F16L25/01 ,  B63B21/50

Abstract: A flexible pipe system includes an unbonded flexible pipe connected to a floating vessel and a sensor system with an optical fibre integrated in the unbonded flexible pipe. Interrogating equipment transmits optical signals into the fibre, receives optical signals reflected from the fibre and detects a parameter of the unbonded flexible pipe. A turret connects the flexible pipe rotationally to the floating vessel via a swivel device that provides a fluid transfer passage between the turret and the vessel. The interrogating equipment is arranged on the turret and is further configured to transfer signals indicative of the detected parameter to receiving equipment on the floating vessel. In this way, optical signals reflected from the fibre can reach the interrogating equipment without distortion in the swivel, so that parameters can be detected with sufficient quality also for floating vessels equipped with a turret mooring system.

公开(公告)号：US10962148B2

公开(公告)日：2021-03-30

申请号：US15751246

申请日：2016-08-05

Applicant: National Oilwell Varco Denmark I/S

Inventor： Kristian Glejbol ,  Michael Eilersen ,  Anders Straarup ,  Christian Ditlev Cappeln

IPC: F16L11/08 ,  F16L11/127 ,  G01K1/14 ,  G01K11/32 ,  F16L53/37 ,  G01M3/38 ,  G01M5/00 ,  G01M3/00

Abstract: The present invention relates to a method of testing an unbonded flexible pipe. The unbonded flexible pipe has a length and a longitudinal axis and comprises, from the inside and out, an internal armour layer, an internal pressure sheath, at least one external amour layer and an outer sheath. At least one of the layers comprises an optical sensor connected to an optical monitoring system and at least one of the armour layers is a metallic and electrically conductive amour layer. The method makes it possible to test an electrical heating system and an optical sensor substantially simultaneously.

公开(公告)号：US20190162336A1

公开(公告)日：2019-05-30

申请号：US16320633

申请日：2017-07-05

Applicant: National Oilwell Varco Denmark I/S

Inventor： Bo Asp Moller Andersen ,  Michael Eilersen ,  Nicky Weppenaar

IPC: F16L11/127

Abstract: A flexible pipe system includes an unbonded flexible pipe connected to a floating vessel and a sensor system with an optical fibre integrated in the unbonded flexible pipe. Interrogating equipment transmits optical signals into the fibre, receives optical signals reflected from the fibre and detects a parameter of the unbonded flexible pipe. A turret connects the flexible pipe rotationally to the floating vessel via a swivel device that provides a fluid transfer passage between the turret and the vessel. The interrogating equipment is arranged on the turret and is further configured to transfer signals indicative of the detected parameter to receiving equipment on the floating vessel. In this way, optical signals reflected from the fibre can reach the interrogating equipment without distortion in the swivel, so that parameters can be detected with sufficient quality also for floating vessels equipped with a turret mooring system.