公开(公告)号：NO20006704L

公开(公告)日：2002-07-01

申请号：NO20006704

申请日：2000-12-29

Applicant: NEXANS

Inventor： MJELSTAD EINAR ,  CLASEN TORUNN LUND ,  IVERSEN OEYVIND

IPC: F16L53/00 ,  F24H1/10 ,  H05B3/40

Abstract: The present invention relates to an offshore installation including an oil/gas flowline umbilical installed between a platform-or a shore installation-and a sea bed based template and including an insulated electrical cable conductor connected in series with the steel oil/gas pipe to a power supply. The main features of the invention is that the far end interconnection between the cable conductor (or parallel cable conductors) and the pipe is grounded to seawater to provide a single point grounded system, such that all the current flows in the selected cable conductors, and the system has zero volts at the far end whereby no current is transmitted though the sea. The power supply is insulated from ground and the current is fed from the power supply through the pipe, and returns through the cable, whereby a voltage level of zero Volts is obtained at the far end where the system is grounded, and all the current is forced through the cable(s) and the pipe/flowline.

公开(公告)号：NO327921B1

公开(公告)日：2009-10-19

申请号：NO20050753

申请日：2005-02-11

Applicant: NEXANS

Inventor： MJELSTAD EINAR

IPC: H01B7/04 ,  H01B20060101 ,  H01B7/14 ,  H02G9/00

Abstract: Electrical signal cable, comprising at least two insulated conductors, wherein each of the insulated conductors is arranged in a groove (2) of a longitudinal central element (1) consisting of an elastic material which allows the insulated conductors to move in radial direction when the electrical signal cable is exposed to longitudinal tensile stress.

公开(公告)号：NO20050753L

公开(公告)日：2006-08-14

申请号：NO20050753

申请日：2005-02-11

Applicant: NEXANS

Inventor： MJELSTAD EINAR

IPC: H01B7/04 ,  H01B20060101 ,  H01B7/14 ,  H02G9/00

Abstract: Electrical signal cable, comprising at least two insulated conductors, wherein each of the insulated conductors is arranged in a groove (2) of a longitudinal central element (1) consisting of an elastic material which allows the insulated conductors to move in radial direction when the electrical signal cable is exposed to longitudinal tensile stress.

公开(公告)号：NO321868B1

公开(公告)日：2006-07-17

申请号：NO20006704

申请日：2000-12-29

Applicant: NEXANS

Inventor： MJELSTAD EINAR ,  CLASEN TORUNN LUND ,  IVERSEN OYVIND

IPC: F16L53/00 ,  F24H1/10 ,  H05B3/40

Abstract: The present invention relates to an offshore installation including an oil/gas flowline umbilical installed between a platform-or a shore installation-and a sea bed based template and including an insulated electrical cable conductor connected in series with the steel oil/gas pipe to a power supply. The main features of the invention is that the far end interconnection between the cable conductor (or parallel cable conductors) and the pipe is grounded to seawater to provide a single point grounded system, such that all the current flows in the selected cable conductors, and the system has zero volts at the far end whereby no current is transmitted though the sea. The power supply is insulated from ground and the current is fed from the power supply through the pipe, and returns through the cable, whereby a voltage level of zero Volts is obtained at the far end where the system is grounded, and all the current is forced through the cable(s) and the pipe/flowline.

公开(公告)号：GB2373321B

公开(公告)日：2003-02-26

申请号：GB0130939

申请日：2001-12-24

Applicant: NEXANS

Inventor： MJELSTAD EINAR ,  IVERSEN OYVIND ,  CLASEN TORUNN LUND

IPC: F16L53/00 ,  F24H1/10 ,  H05B3/40 ,  E21B43/01

Abstract: The present invention relates to an offshore installation including an oil/gas flowline umbilical installed between a platform-or a shore installation-and a sea bed based template and including an insulated electrical cable conductor connected in series with the steel oil/gas pipe to a power supply. The main features of the invention is that the far end interconnection between the cable conductor (or parallel cable conductors) and the pipe is grounded to seawater to provide a single point grounded system, such that all the current flows in the selected cable conductors, and the system has zero volts at the far end whereby no current is transmitted though the sea. The power supply is insulated from ground and the current is fed from the power supply through the pipe, and returns through the cable, whereby a voltage level of zero Volts is obtained at the far end where the system is grounded, and all the current is forced through the cable(s) and the pipe/flowline.

公开(公告)号：NO20006704D0

公开(公告)日：2000-12-29

申请号：NO20006704

申请日：2000-12-29

Applicant: NEXANS

Inventor： MJELSTAD EINAR ,  CLASEN TORUNN LUND ,  IVERSEN OEYVIND

IPC: F16L53/00 ,  F24H1/10 ,  H05B3/40 ,  H05B

Abstract: The present invention relates to an offshore installation including an oil/gas flowline umbilical installed between a platform-or a shore installation-and a sea bed based template and including an insulated electrical cable conductor connected in series with the steel oil/gas pipe to a power supply. The main features of the invention is that the far end interconnection between the cable conductor (or parallel cable conductors) and the pipe is grounded to seawater to provide a single point grounded system, such that all the current flows in the selected cable conductors, and the system has zero volts at the far end whereby no current is transmitted though the sea. The power supply is insulated from ground and the current is fed from the power supply through the pipe, and returns through the cable, whereby a voltage level of zero Volts is obtained at the far end where the system is grounded, and all the current is forced through the cable(s) and the pipe/flowline.