公开(公告)号：EP1676161A4

公开(公告)日：2011-01-19

申请号：EP04795395

申请日：2004-10-15

申请人： HUAWEI MARINE NETWORKS CO LTD

发明人： NAGEL JONATHAN A ,  TAYLOR NIGEL HUNT ,  EVANGELIDES STEPHEN G JR

IPC分类号： H04J14/02 ,  B63G20060101 ,  G02B6/28 ,  G02B6/293 ,  G02B6/34

CPC分类号： H04J14/0201 ,  G02B6/29383 ,  H04J14/0206 ,  H04J14/0217

摘要： A branching unit is provided for interconnecting at least three undersea optical transmission cables. The branching unit includes first, second and third ports for receiving first, second and third undersea optical transmission cables, respectively. The first and second cables each include an electrical power conductor and a plurality of first optical fibers. The third cable is electrically unpowered and includes at least one drop optical fiber and at least one add optical fiber. An electrical power conductor segment is provided for electrically coupling the conductor in the first cable received in the first port to the conductor in the second cable received in the second port. A first optical fiber segment optically couples a first of the plurality of first optical fibers in one of the first or second cables to the drop optical fiber of the third cable. A second optical fiber segment optically couples a second of the plurality of first optical fibers in one of the first and second cables to the add optical fiber of the third cable. First and second optical amplifiers are located along the first and second optical fiber segments, respectively so that the first optical amplifier provides optical gain to traffic being dropped on the drop optical fiber of the third cable and the second optical amplifier provides optical gain to traffic being added on the add optical fiber of the third cable. At least one electrically conductive path is provided for supplying electrical energy from at least one of the electrical power conductors to each of the optical amplifiers.

公开(公告)号：EP1670674A4

公开(公告)日：2011-07-20

申请号：EP04809446

申请日：2004-06-14

申请人： ADVANCED MARITIME SUPPORT TECHNOLOGY INC

发明人： MURPHY ROBERT JOSEPH ,  SAUNDERS OLIN PHILLIP

IPC分类号： B63B21/04 ,  B63B23/00 ,  B63B23/40 ,  B63B27/10 ,  B63B27/16 ,  B63G20060101

CPC分类号： B63B21/04 ,  B63B23/00 ,  B63B23/30 ,  B63B23/40 ,  B63B27/10 ,  B63B27/36 ,  B63B35/40 ,  B63B2035/008

公开(公告)号：EP1831486A4

公开(公告)日：2011-05-04

申请号：EP05819375

申请日：2005-11-30

申请人： MITRA AS

发明人： HANSEN GUTTORM

IPC分类号： E04H15/60 ,  B63G20060101 ,  F41H3/02

CPC分类号： F41H3/02

公开(公告)号：EP1836375A4

公开(公告)日：2011-03-16

申请号：EP05821491

申请日：2005-12-23

申请人： STATOIL ASA

发明人： BOERNES ATLE HARALD ,  RAMBERG RUNE MODE

IPC分类号： E21B37/00 ,  B63G20060101 ,  E21B36/00 ,  E21B43/01 ,  E21B43/24 ,  F16L1/12 ,  F16L53/00 ,  H05B3/58

CPC分类号： F16L1/123 ,  E21B43/01 ,  F16L53/37 ,  H05B3/58

摘要： A system for power supply to subsea installations and plants for production of hydrocarbons, comprising a preferably heat insulated pipeline (10), in which the possibility for internal formation of detrimental hydrates or wax deposits are present, and comprising electrical power supply cables (12, 31) for direct electrical heating of the pipeline (10), and having an electrical connection (36) to the surrounding sea at an end of the supply cable. The power supply cable (12) is further configured, in a second circuit configuration, to provide a three-phase power supply to an electrically powered motor in an subsea installation unit (11) connected to the pipeline (10), and that means (18, 19) are arranged for switching so that the three conductors (28) forming the power supply cables (12) form parallel conductors in a second circuit configuration, wherein the power supply cables (12, 31) supply power for direct heating of the pipeline (10).