BR9805257A - Sistema de produção de hidrocarbonetos submersos - Google Patents

Sistema de produção de hidrocarbonetos submersos

Info

Publication number
BR9805257A
BR9805257A BR9805257-8A BR9805257A BR9805257A BR 9805257 A BR9805257 A BR 9805257A BR 9805257 A BR9805257 A BR 9805257A BR 9805257 A BR9805257 A BR 9805257A
Authority
BR
Brazil
Prior art keywords
submerged
unit
line
forming part
hydrocarbon production
Prior art date
Application number
BR9805257-8A
Other languages
English (en)
Inventor
Christopher David Baggs
Steven Robert Powell
Original Assignee
Abb Seatec Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Seatec Ltd filed Critical Abb Seatec Ltd
Publication of BR9805257A publication Critical patent/BR9805257A/pt

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/0355—Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well heads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
    • H02J13/00009—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission using pulsed signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/12—The local stationary network supplying a household or a building

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

SISTEMAS DE PRODUçãO DE HIDROCARBONETOS SUBMERSOS Sistema de produção de hidrocarboneto compreende uma instalação no lado de cima conectada a uma unidade 4 de distribuição submersa mediante uma linha umbilical 3. A unidade 4 é conectada às árvores de Natal 8, 9 e 10 mediante interconexões respectivas dentre as interconexões de ponte 11, 12 e 13. Cada árvore de Natal pode compreender um ou mais de um acionador elétrico 14, estrangulador 16 de controle de taxa de fluxo, transdutor 18 de pressão e/ou temperatura, transdutores 18A de medição de fundo de furo e/ou válvula 21 de segurança de fundo de furo. A energia elétrica é transmitida à unidade 4 mediante um cabo de transmissão de alta voltagem formando parte da linha umbilical 3. Um transformador formando parte da unidade 4 reduz a voltagem transmitida através da linha umbilical 3 até um nível adequado para uso pelos dispositivos elétricos 14, 16 e 21. Energia e controle dos dispositivos 14, 16, 18, 18A, 21 são efetuados por um controlador submerso 5, 6. 7 associado com sua árvore de Natal respectiva 8, 9, 10. Dados de controle e medição podem ser efetuados entre a estação 2 do lado de cima e as árvores de Natal 8, 9, 10 mediante sinais de comunicação modulados no cabo de transmissão de alta voltagem, uma linha de transmissão de baixa voltagem ou uma linha de comunicação exclusiva formando parte da linha umbilical 3. Em outras modalidades (Figura 3, Figura 4, não mostrada) um ou mais condutores gerais de campo são utilizados para comunicar dados e energia aos dispositivos 14, 16, 18, 18A e 21 e a um controlador submerso 5, e/ou entre a unidade 4 e uma pluralidade de controladores submersos.
BR9805257-8A 1997-12-10 1998-12-09 Sistema de produção de hidrocarbonetos submersos BR9805257A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9726167A GB2332220B (en) 1997-12-10 1997-12-10 An underwater hydrocarbon production system

Publications (1)

Publication Number Publication Date
BR9805257A true BR9805257A (pt) 2001-09-18

Family

ID=10823428

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9805257-8A BR9805257A (pt) 1997-12-10 1998-12-09 Sistema de produção de hidrocarbonetos submersos

Country Status (4)

Country Link
US (1) US6420976B1 (pt)
BR (1) BR9805257A (pt)
GB (1) GB2332220B (pt)
NO (1) NO319199B1 (pt)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053627A1 (en) 1998-04-10 1999-10-21 Chrimar Systems, Inc. Doing Business As Cms Technologies System for communicating with electronic equipment on a network
FR2789439B1 (fr) * 1999-02-05 2001-04-20 Schlumberger Services Petrol Procede de sauvegarde d'un train d'outils installe dans un puits petrolier et ensemble de transmission correspondant
US7259688B2 (en) * 2000-01-24 2007-08-21 Shell Oil Company Wireless reservoir production control
AU2001245389B2 (en) * 2000-03-02 2004-08-19 Shell Internationale Research Maatschappij B.V. Wireless power and communications cross-bar switch
DE20115474U1 (de) 2001-09-19 2003-02-20 Biester, Klaus, 29342 Wienhausen Gleichspannungs-Wandlervorrichtung
DE20115471U1 (de) 2001-09-19 2003-02-20 Biester, Klaus, 29342 Wienhausen Universelles Energieversorgungssystem
US7615893B2 (en) 2000-05-11 2009-11-10 Cameron International Corporation Electric control and supply system
DE20018560U1 (de) 2000-10-30 2002-03-21 CAMERON GmbH, 29227 Celle Steuer- und Versorgungssystem
DE20115473U1 (de) 2001-09-19 2003-02-20 Biester, Klaus, 29342 Wienhausen Universelles Energieversorgungssystem
US7322410B2 (en) * 2001-03-02 2008-01-29 Shell Oil Company Controllable production well packer
GB0105856D0 (en) * 2001-03-09 2001-04-25 Alpha Thames Ltd Power connection to and/or control of wellhead trees
DE20115475U1 (de) 2001-09-19 2003-02-20 Biester, Klaus, 29342 Wienhausen Gleichspannungs-Wandlervorrichtung
US7020271B2 (en) 2003-06-12 2006-03-28 Barbara Isabel Hummel Ring control device
GB2382600B (en) * 2001-12-03 2005-05-11 Abb Offshore Systems Ltd Transmitting power to an underwater hydrocarbon production system
GB2387977B (en) 2002-04-17 2005-04-13 Abb Offshore Systems Ltd Control of hydrocarbon wells
GB2396086C (en) * 2002-12-03 2007-11-02 Vetco Gray Controls Ltd A system for use in controlling a hydrocarbon production well
DE20306064U1 (de) * 2003-04-16 2004-09-02 Hawe Hydraulik Gmbh & Co. Kg Elektrohydraulische Steuervorrichtung und Anschlussgehäuse für eine elektrohydraulische Steuervorrichtung
GB2427040B (en) * 2004-02-20 2008-03-26 Fmc Kongsberg Subsea As Subsea control system
GB2456442B (en) * 2004-12-22 2009-09-09 Vetco Gray Controls Ltd Hydraulic Control System
GB2429126A (en) * 2005-08-09 2007-02-14 Vetco Gray Controls Ltd Fibre optic umbilical for underwater well with electrically powered optical repeater
NO325437B1 (no) * 2005-11-11 2008-05-05 Norsk Hydro Produksjon As Arrangement for ekstern dodstart av undersjoisk kraftsystem
NO326036B1 (no) * 2005-11-11 2008-09-01 Norsk Hydro Produksjon As Arrangement for kontrollert oppstart av stromforsyning til en undervannsinstallasjon
NO326936B1 (no) * 2005-11-11 2009-03-16 Norsk Hydro Produksjon As Undervann avbruddsikkert stromforsyningssystem
US7931090B2 (en) 2005-11-15 2011-04-26 Schlumberger Technology Corporation System and method for controlling subsea wells
NO325743B1 (no) * 2006-07-05 2008-07-14 Vetco Gray Scandinavia As Undersjoisk bryterinnretning
US7835221B2 (en) * 2006-07-06 2010-11-16 Westerngeco L.L.C. Optical methods and systems in marine seismic surveying
US7921919B2 (en) * 2007-04-24 2011-04-12 Horton Technologies, Llc Subsea well control system and method
US7676327B2 (en) 2007-04-26 2010-03-09 Westerngeco L.L.C. Method for optimal wave field separation
EP2160845B1 (en) 2007-05-30 2018-10-03 OneSubsea IP UK Limited Power and signal distribution system
GB2452948B (en) * 2007-09-20 2012-02-22 Vetco Gray Controls Ltd Shutdown system
GB0722469D0 (en) 2007-11-16 2007-12-27 Statoil Asa Forming a geological model
GB0724847D0 (en) 2007-12-20 2008-01-30 Statoilhydro Method of and apparatus for exploring a region below a surface of the earth
US7967066B2 (en) * 2008-05-09 2011-06-28 Fmc Technologies, Inc. Method and apparatus for Christmas tree condition monitoring
US9207347B2 (en) * 2008-07-05 2015-12-08 Westerngeco L.L.C. Determining the structure of a towed seismic spread element
CN101324657B (zh) * 2008-07-15 2012-07-18 国网电力科学研究院武汉南瑞有限责任公司 变电站高压计量用互感器在线监测方法
US7845404B2 (en) * 2008-09-04 2010-12-07 Fmc Technologies, Inc. Optical sensing system for wellhead equipment
GB2463487A (en) * 2008-09-15 2010-03-17 Viper Subsea Ltd Subsea protection device
US20100252269A1 (en) * 2009-04-01 2010-10-07 Baker Hughes Incorporated System and method for monitoring subsea wells
US20100300696A1 (en) * 2009-05-27 2010-12-02 Schlumberger Technology Corporation System and Method for Monitoring Subsea Valves
US9376894B2 (en) * 2009-11-19 2016-06-28 Onesubsea Ip Uk Limited Control and supply unit
GB0921632D0 (en) * 2009-12-10 2010-01-27 Viper Subsea Ltd Line monitoring device
WO2011113448A1 (en) * 2010-03-18 2011-09-22 Cameron International Corporation Control and supply unit
WO2011113449A1 (en) * 2010-03-18 2011-09-22 Cameron International Corporation Control and supply unit
GB2479200A (en) 2010-04-01 2011-10-05 Statoil Asa Interpolating pressure and/or vertical particle velocity data from multi-component marine seismic data including horizontal derivatives
GB2480652B (en) * 2010-05-27 2015-07-29 Ge Oil & Gas Uk Ltd Extending the life of a compromised umbilical
US8757270B2 (en) 2010-05-28 2014-06-24 Statoil Petroleum As Subsea hydrocarbon production system
EP2400663A1 (en) * 2010-06-17 2011-12-28 Vetco Gray Controls Limited AC power supply circuitry
EP2447798B1 (en) * 2010-10-26 2014-07-23 Vetco Gray Controls Limited Testing a control system including a valve
US8624530B2 (en) * 2011-06-14 2014-01-07 Baker Hughes Incorporated Systems and methods for transmission of electric power to downhole equipment
EP2549677A1 (en) * 2011-07-21 2013-01-23 Siemens Aktiengesellschaft Method for operating a communication system and communication system
EP2549056A1 (en) 2011-07-22 2013-01-23 Siemens Aktiengesellschaft Subsea communication system
US8725302B2 (en) 2011-10-21 2014-05-13 Schlumberger Technology Corporation Control systems and methods for subsea activities
EP2842205A4 (en) * 2012-04-27 2016-02-17 Exxonmobil Upstream Res Co METHOD FOR PERMITTING DESIGN OF AN UNDERWATER ELECTRIC SUBSTATION AND ELECTRICITY DISTRIBUTION SYSTEM
US10526882B2 (en) * 2012-11-16 2020-01-07 U.S. Well Services, LLC Modular remote power generation and transmission for hydraulic fracturing system
US8851161B2 (en) * 2013-01-22 2014-10-07 Halliburton Energy Services, Inc. Cross-communication between electronic circuits and electrical devices in well tools
NO337300B1 (no) * 2013-04-17 2016-03-07 Fmc Kongsberg Subsea As Subsea-høyspenningsdistribusjonssystem
EP2801695A1 (en) 2013-05-08 2014-11-12 Siemens Aktiengesellschaft Subsea electrical unit and system
NO336017B1 (no) * 2013-07-01 2015-04-20 Aker Subsea As Redundans for undervanns elektrisk aktivatorstyring
EP2848763A1 (en) * 2013-09-11 2015-03-18 Alcatel Lucent Controlling a power supply at a subsea node
NO337678B1 (no) 2014-05-26 2016-06-06 Fmc Kongsberg Subsea As Undersjøisk effektdistribusjonsinnretning og - system.
GB2536451A (en) 2015-03-17 2016-09-21 Ge Oil & Gas Uk Ltd Underwater hydrocarbon extraction facility
US10267097B2 (en) * 2016-11-09 2019-04-23 Baker Hughes, A Ge Company, Llc Pressure compensating connector system, downhole assembly, and method
NO343693B1 (en) * 2017-06-14 2019-05-13 Fmc Kongsberg Subsea As Electric power and communication module
DE102019100428A1 (de) * 2019-01-09 2020-07-09 WAGO Verwaltungsgesellschaft mit beschränkter Haftung Feldbussystem zur ansteuerung von leistungsausgängen
CN115441455B (zh) * 2022-11-07 2023-05-26 深之蓝海洋科技股份有限公司 一种水下机器人系统
WO2024178005A1 (en) * 2023-02-20 2024-08-29 Onesubsea Llc Integral multi-master power and communication bus rail system

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777812A (en) * 1971-11-26 1973-12-11 Exxon Production Research Co Subsea production system
GB2059483B (en) * 1979-10-02 1983-02-02 Fmc Corp Method and apparatus for controlling subsea well template production systems
US4378848A (en) * 1979-10-02 1983-04-05 Fmc Corporation Method and apparatus for controlling subsea well template production systems
US4309734A (en) * 1979-11-05 1982-01-05 Trw Inc. Methods and apparatus for limiting electrical current to a subsea petroleum installation
US4646083A (en) * 1984-04-26 1987-02-24 Hydril Company Borehole measurement and telemetry system
GB2194980B (en) * 1986-07-26 1990-05-16 British Petroleum Co Plc Control system for subsea oil production
US5256844A (en) * 1986-11-07 1993-10-26 Aker Engineering A/S Arrangement in a pipeline transportation system
US4901069A (en) * 1987-07-16 1990-02-13 Schlumberger Technology Corporation Apparatus for electromagnetically coupling power and data signals between a first unit and a second unit and in particular between well bore apparatus and the surface
GB2214004B (en) * 1987-12-18 1992-03-18 Nl Petroleum Services Electrical connectors incorporating automatic power control
US5251703A (en) * 1991-02-20 1993-10-12 Halliburton Company Hydraulic system for electronically controlled downhole testing tool
US5101907A (en) * 1991-02-20 1992-04-07 Halliburton Company Differential actuating system for downhole tools
NO174488C (no) * 1992-02-12 1994-05-11 Alcatel Stk As Kabel for overföring av kraft og signaler
FR2727581B1 (fr) * 1994-11-24 1996-12-27 Cegelec Systeme d'alimentation d'auxiliaires pour station de pompage alimentee a distance
NO303144B1 (no) * 1995-03-20 1998-06-02 Norske Stats Oljeselskap System for produksjon av hydrokarboner fra reservoarer til havs
US6150954A (en) * 1998-02-27 2000-11-21 Halliburton Energy Services, Inc. Subsea template electromagnetic telemetry

Also Published As

Publication number Publication date
US6420976B1 (en) 2002-07-16
NO985751D0 (no) 1998-12-08
NO319199B1 (no) 2005-06-27
NO985751L (no) 1999-06-11
GB2332220A9 (en) 1900-01-01
GB9726167D0 (en) 1998-02-11
GB2332220B (en) 2000-03-15
GB2332220A (en) 1999-06-16

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Legal Events

Date Code Title Description
FB34 Technical and formal requirements: requirement - article 34 of industrial property law
B25D Requested change of name of applicant approved

Owner name: ABB OFFSHORE SYSTEMS LIMITED (GB)

Free format text: ALTERADO DE: ABB SEATEC LIMITED

B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O(S) ARTIGO(S) 8O E 13 DA LPI

B12B Appeal against refusal [chapter 12.2 patent gazette]