公开(公告)号：US20180231150A1

公开(公告)日：2018-08-16

申请号：US15751607

申请日：2016-08-08

Applicant: National Oilwell Varco Denmark I/S

Inventor： Kristian GLEJBØL ,  Anders STRAARUP

IPC: F16L11/08 ,  F16L53/37 ,  F16L53/38

CPC classification number: F16L11/083 ,  B32B1/08 ,  B32B2597/00 ,  F16L53/37 ,  F16L53/38 ,  F16L59/153 ,  H05B2214/03

Abstract: The present invention relates to an unbonded flexible pipe having a length and a longitudinal axis and comprising, from the inside and out, a carcass, an internal pressure sheath, at least one external amour layer, and an outer sheath, the carcass comprises at least one elongate armour element helically wound to surround the center axis with a winding degree to the longitudinal axis. The elongate armour element is electrically conductive and comprises at least a first section and a second section along the length of the pipe where the electrical resistance of the first section is different from the electrical resistance of the second section.

公开(公告)号：US20180245725A1

公开(公告)日：2018-08-30

申请号：US15751270

申请日：2016-08-05

Applicant: National Oilwell Varco Denmark I/S

Inventor： Kristian GLEJBØL ,  Michael HJORTH ,  Bo Asp Moller ANDERSEN ,  Nicky WEPPENAAR ,  Christian Ditlev CAPPELN

IPC: F16L53/37 ,  H05B1/02

CPC classification number: F16L53/37 ,  F16L11/08 ,  F16L11/12 ,  F16L11/127 ,  F16L53/34 ,  G01K13/00 ,  H05B1/0244

Abstract: The present invention relates to a method and a system comprising a floating unit for processing, handling or storing a fluid and at least one unbonded flexible pipe for transporting said fluid to the floating unit. The unbonded flexible pipe comprises an electric heating system, and the temperature of the fluid in the unbonded flexible pipe is measured and the measured temperature is used to control the electrical input to the electric heating system in the unbonded flexible pipe.