US3894560A - Subsea control network - Google Patents

Subsea control network Download PDF

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Publication number
US3894560A
US3894560A US491225A US49122574A US3894560A US 3894560 A US3894560 A US 3894560A US 491225 A US491225 A US 491225A US 49122574 A US49122574 A US 49122574A US 3894560 A US3894560 A US 3894560A
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US
United States
Prior art keywords
valve
pod
fluid
control
operating
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US491225A
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English (en)
Inventor
Benton F Baugh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FSSL Inc
Vetco Inc
Original Assignee
Vetco Offshore Industries Inc
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Filing date
Publication date
Application filed by Vetco Offshore Industries Inc filed Critical Vetco Offshore Industries Inc
Priority to US491225A priority Critical patent/US3894560A/en
Priority to GB2133175A priority patent/GB1470943A/en
Priority to FR7516111A priority patent/FR2280008A1/fr
Priority to CA227,853A priority patent/CA1022844A/fr
Priority to NO751959A priority patent/NO751959L/no
Priority to JP50077443A priority patent/JPS5120001A/ja
Publication of US3894560A publication Critical patent/US3894560A/en
Application granted granted Critical
Assigned to VETCO OFFSHORE, INC. A CORP OF DE reassignment VETCO OFFSHORE, INC. A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: VETCO INC.
Assigned to VETCO OFFSHORE INDUSTRIES, INC., A DE. CORP. reassignment VETCO OFFSHORE INDUSTRIES, INC., A DE. CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: VETCO OFFSHORE, INC., A CORP. OF DE.
Assigned to CITIBANK, N.A., reassignment CITIBANK, N.A., SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VETCO GRAY INC., A DE. CORP.
Assigned to VETCO GRAY INC., reassignment VETCO GRAY INC., MERGER (SEE DOCUMENT FOR DETAILS). TEXAS, EFFECTIVE NOVEMBER 14, 1986 & DECEMBER 17, 1986. Assignors: GRAY TOOL COMPANY, A TX. CORP. (INTO), VETCO OFFSHORE INDUSTRIES, INC., A CORP. (CHANGED TO)
Assigned to VETCO GRAY INC., A DE CORP. reassignment VETCO GRAY INC., A DE CORP. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITIBANK, N.A.
Assigned to FSSL, INC. reassignment FSSL, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: VETCO GRAY INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/402—Distribution systems involving geographic features
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87571—Multiple inlet with single outlet
    • Y10T137/87676—With flow control
    • Y10T137/87684—Valve in each inlet

Definitions

  • ABSTRACT [52] 1.1.5. Cl. 137/606; 137/236; 166/75; A new and improved subsea control system which 251/14; 251/26; 251/130 eliminates the necessity of redundant control lines ex- [51 Int. Cl .i E211) 43/01 tending from the water surface to an underwater we11- [58] Field of Search 166/5, .6; 251/14, 26, head installation such as a christmas tree, including a 251/130; 137/567; 61/5358; 137/236, 606 multiple pressure responsive sequence valve mounted in a single hydraulic control line for providing direct [56] References Cited control to the valves on the underwater installation UNITED STATES PATENTS under emergency conditions.
  • christmas trees mounted at the wellhead of underwater wells to control production in such wells.
  • Such christmas trees generally include a number of specific function operating valves which control the actual flow of oil from the well through a flow-line to some type of storage facility on the surface of the water.
  • the christmas tree valves are controlled by various types of control systems including totally hydraulic systems, electro-hydraulic systems, and electric control systems. If the christmas tree control system is hydraulic or electro-hydraulic. it is necessary to extend at least one hydraulic supply line from the surface control platform down to the christmas tree in order to provide fluid under pressure to the wellhead.
  • electro-hydraulic or hydraulic control systems are used to control a subsurface christmas tree.
  • Another method of extending christmas tree operating life is to provide the conventional hydraulic control system, including the hydraulic control line and control pod in combination with a separate hydraulic supply line connected to some type of pressure operated valve, which valve is connected with the christmas tree valves through a shuttle valve for the purpose of operating the christmas tree valves in the event of failure of the main pod.
  • FIG. is a schematic view of an underwater installation such a christmas tree which is connected to the new and improved failsafe control system of the preferred embodiment of this invention.
  • the letter C generally designates in the drawing the subsea control system of the preferred embodiment of this invention for controlling an underwater installation such as the christmas tree T mounted subsea.
  • the christmas tree T is illustrated as being mounted onto a wellhead connector 10 which in turn is mounted onto a wellhead guide structure II.
  • the christmas tree T, the wellhead connector 10 and the guide structure 11 are all subsea equipment well known in the oil industry.
  • a suitable guide structure 11 is illustrated on page 4500 of the Composite Catalog of Oil Field Equipment and Services, Volume 3, page 4500, published by World Oil, l972l973.
  • a suitable wellhead connector such as [0 is illustrated on page 4509 of the same volume.
  • a suitable christmas tree T is illustrated on pages 4536-4537 of the same volume.
  • the numbers 12, 14, 15 and I6 designate valve operators for certain christmas tree vlves such as production valves, testing valves and safety valves, all of which are known in the art.
  • the valve operators 12-16 are hydraulically operated to open and close such valves using hydraulic pressure.
  • the christmas tree T further includes a christmas tree manifold 17 having mounted thereon a christmas tree cap 18.
  • the subsea control system C includes the surface control system 20 which is schematically illustrated as a panel 20a mounted above the water line 21.
  • the surface control system may be similar to the control system illustrated on page 4164 of Volume 3 of the Composite Catalog of Oil Field Equipment and Services, l972-1973.
  • the control panel 200 is merely representative of the entire surface control system which is adapted to provide hydraulic fluid under pressure and suitable electric signals to the underwater christmas tree T for operating the valves mounted thereon controlled by valve operators such as l2-16.
  • the christmas tree T has mounted thereon a control pod 23 which is adapted to receive hydraulic signals and electrical signals from the surface control system 20 for the purpose of operating the valve operators such as l2l6.
  • the control pod 23 may be landed with the christmas tree T itself or may be landed on the christmas tree T after the christmas tree T is secured at the wellhead.
  • the control pod 23 may be known in the art and may be a pod similar to the control pods illustrated on pages 4l54-4l59 in Volume 3 of the Composite Catalog of Oil Field Equipment and Services, 1972-l973.
  • a flowline 24 extends from a surface storage facility (not shown) downwardly to a flowline connector station such as described in U.S. Pat. Application, Ser. No. 386,431 now US. pat. No.
  • the shuttle valve 29 provides a fluid output signal to valve operator 15 in response to a fluid input signal either from line 28a or from line 270, which is the sequence output line connected to that shuttle valve.
  • the shuttle valve 30 provides the fluid output signal to line 30b and thus to valve operator 16 in response to a fluid input signal either from pod input line 300 or from sequence valve output line 27d.
  • valve operators such as 14, 15 and 16 are operable based upon receipt of output signals from the shuttle valves 28-30, respectively. And, the shuttle valves 28-30 provide output signals in response to fluid input signals from either the control pod 23 or from the sequence valve 27.
  • the sequence valve 27 is capable of diverting a fluid input signal through line 26 into any of the four lines 27a-27d, depending upon the fluid pressure level of the input signal in line 26. Further, whenever the fluid input signal in line 26 is diverted through the sequence valve 27 into any one particular output line, for example 27a, fluid pressure is not provided through any of the other output lines 27b-2 7d.
  • the sequence valve is run or lowered onto the christmas tree either with the christmas tree cap or the pod 23.
  • suitable hydraulic connectors known in the art connect the sequence valve to the pod 23 and to the shuttle valves 28-30.
  • fluid pressure through input line 26 is diverted into the pod input line 27a at a first pressure level. This first pressure level is used exclusively during normal operating conditions.
  • the subsea control pod 23 receives the fluid pressure through line 27a and in cooperation with electrical signals from line 221), controls the application of hydraulic fluid through lines 280, 29a, and 30a in order to direct fluid into the shuttle valves 28-30 respectively, and thus control the operation of valve operators 14-16.
  • valve operator 16 can be actuated by increasing the fluid pressure level in lines 220 and 26 to a fourth pressure level higher than the three previous pressure levels thereby causing the sequence valve 27 to shift and deliver the fluid under pressure through line 27d into shuttle valve 30.
  • each of the shuttle valves such as 28 acts to provide an output fluid signal through output line such as 2811 in response to a fluid signal through either of the input lines such as 280 or 27b.
  • the sequence valve 27 may be utilized to override the subsea control valve pod 23 whenever necessary.
  • the se- Ill quence valve 27 can be run or lowered onto the christmas tree T with the pod 23. itself instead of with the tree cap 18. In either event. the sequence is removable and retractable from the tree T. Also. the signal output lines such as 2717 for the sequence valve 27 can be connected to more than one valve operator if desired.
  • a new and improved subsea control system for operating a wellhead valve system at a subsea wellhead installation comprising:
  • a wellhead valve system having various valve operators mounted therewith for normally operating and controlling flow through said wellhead valve system.
  • said wellhead valve system including an electro-hydraulic control pod for normally operating said various valve operators;
  • multiple pressure responsive failsafe valve connected to said twowvay hydraulic control valves and to said control pod. said multiple pressure responsive valve providing various distinct fluid output signals in response to a change in pressure of a single fluid input signal;
  • ssaid surface control means and said single hydraulic control line including means for delivering a first fluid input signal to said multiple pressure responsive valve which delivers a first fluid output signal to said control pod.
  • said control pod utilizing such first fluid output signal for delivering valve operating signals to said two-way valves for operating said valve operators under normal conditions.
  • said surface control means and said hydraulic control line providing a second fluid input signal to said multiple pressure responsive valve, which includes means for delivering said second input signal to at least one of said two-way valves for directly operating at least one of said valve operators.
  • said multiple pressure responsive valve including means for closing off the delivery of said fluid to said control pod in conjunction with said delivery of fluid to one of said two-way valves.
  • said first fluid input signal is at a higher pressure than said second fluid input signal.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid-Pressure Circuits (AREA)
US491225A 1974-07-24 1974-07-24 Subsea control network Expired - Lifetime US3894560A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US491225A US3894560A (en) 1974-07-24 1974-07-24 Subsea control network
GB2133175A GB1470943A (en) 1974-07-24 1975-05-19 Subsea control system
FR7516111A FR2280008A1 (fr) 1974-07-24 1975-05-23 Dispositif de commande subaquatique pour tete de tubage
CA227,853A CA1022844A (fr) 1974-07-24 1975-05-27 Reseau sous-marin de controle
NO751959A NO751959L (fr) 1974-07-24 1975-06-04
JP50077443A JPS5120001A (fr) 1974-07-24 1975-06-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US491225A US3894560A (en) 1974-07-24 1974-07-24 Subsea control network

Publications (1)

Publication Number Publication Date
US3894560A true US3894560A (en) 1975-07-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US491225A Expired - Lifetime US3894560A (en) 1974-07-24 1974-07-24 Subsea control network

Country Status (6)

Country Link
US (1) US3894560A (fr)
JP (1) JPS5120001A (fr)
CA (1) CA1022844A (fr)
FR (1) FR2280008A1 (fr)
GB (1) GB1470943A (fr)
NO (1) NO751959L (fr)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034774A (en) * 1975-07-07 1977-07-12 Lone Star Gas Company Low point control system
US4174000A (en) * 1977-02-26 1979-11-13 Fmc Corporation Method and apparatus for interfacing a plurality of control systems for a subsea well
EP0009364A2 (fr) * 1978-09-27 1980-04-02 Fmc Corporation Appareil pour commander hydrauliquement à distance un dispositif de contrôle d'un puits sous-marin
US4337829A (en) * 1979-04-05 1982-07-06 Tecnomare, S.P.A. Control system for subsea well-heads
US4355547A (en) * 1979-05-30 1982-10-26 Bl Cars Limited Continuously variable ratio transmission
WO1982003887A1 (fr) * 1981-05-01 1982-11-11 Hurta Gary Lee Commande hydraulique d'une installation de puits sous-marin
US4497369A (en) * 1981-08-13 1985-02-05 Combustion Engineering, Inc. Hydraulic control of subsea well equipment
WO1987001159A1 (fr) * 1985-08-12 1987-02-26 Cbv Indústria Mecânica S.A. Module a vannes, notamment pour puits de petrole submarins
WO1987001157A1 (fr) * 1985-08-12 1987-02-26 Cbv Indústria Mecânica S.A. Module a vannes, notamment pour puits de petrole sous-marins
WO1987001158A1 (fr) * 1985-08-12 1987-02-26 Cbv Indústria Mecânica S.A. Module a vannes, notamment pour puits de petrole sous-marins
US4687179A (en) * 1983-03-21 1987-08-18 Smith Gordon M Automatic valve actuator and control system
WO1988003596A1 (fr) * 1986-11-11 1988-05-19 Myrmidon Subsea Controls Ltd Systemes et dispositifs sous-marins
WO1997023708A1 (fr) * 1995-12-22 1997-07-03 Sietse Koopmans Beheer B.V. Dispositif pour tete de puits
WO2000008297A1 (fr) * 1998-08-06 2000-02-17 Dtc International, Inc. Module de commande sous-marin
US6046685A (en) * 1996-09-23 2000-04-04 Baker Hughes Incorporated Redundant downhole production well control system and method
US6484806B2 (en) 2001-01-30 2002-11-26 Atwood Oceanics, Inc. Methods and apparatus for hydraulic and electro-hydraulic control of subsea blowout preventor systems
US20050039923A1 (en) * 2003-08-21 2005-02-24 Philip Howe Well control means
US20050087344A1 (en) * 2003-10-24 2005-04-28 Schlumberger Technology Corporation System and Method to Control Multiple Tools Through One Control Line
WO2005081077A2 (fr) * 2004-02-20 2005-09-01 Fmc Kongsberg Subsea As Systeme de commande sous-marin
US20060037758A1 (en) * 2004-08-20 2006-02-23 Oceaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US20060090898A1 (en) * 2004-10-19 2006-05-04 Oceaneering International, Inc. Subsea junction plate assembly running tool and method of installation
US20060157250A1 (en) * 2004-12-23 2006-07-20 Remote Marine Systems Limited Improvements In or Relating to Sub Sea Control and Monitoring
US20060157254A1 (en) * 2004-12-22 2006-07-20 Vetco Gray Controls Limited Hydraulic control system
US20080110633A1 (en) * 2006-09-20 2008-05-15 Ross John Trewhella Method of controlling landing strings in offshore operations
US20080257559A1 (en) * 2004-12-03 2008-10-23 Vetco Gray Scandinavia As Hybrid Control System And Method
US20080264646A1 (en) * 2004-12-22 2008-10-30 Vidar Sten-Halvorsen Modular Actuator for Subsea Valves and Equipment, and Methods of Using Same
GB2452948A (en) * 2007-09-20 2009-03-25 Vetco Gray Controls Ltd A shutdown system for an underwater production facility.
US20100006299A1 (en) * 2006-10-04 2010-01-14 Fluor Technologies Corporation Dual Subsea Production Chokes for HPHT Well Production
US20110079395A1 (en) * 2009-10-02 2011-04-07 Schlumberger Technology Corporation Method and system for running subsea test tree and control system without conventional umbilical
US20110265885A1 (en) * 2010-04-30 2011-11-03 Hydril Usa Manufacturing Llc Subsea Control Module with Removable Section and Method
US20120132436A1 (en) * 2010-11-30 2012-05-31 Hydril Usa Manufacturing Llc Blowout Preventer with Intervention, Workover Control System Functionality and Method
WO2013062421A1 (fr) * 2011-10-27 2013-05-02 Subsea Solutions As Procédé et dispositif permettant de prolonger la durée de vie d'une tête de puits
WO2013112054A1 (fr) * 2011-02-02 2013-08-01 Subsea Solutions As Procédé et dispositif destiné à étendre au moins la durée de vie d'un arbre de noël ou d'un câble ombilical
CN103597167A (zh) * 2011-05-24 2014-02-19 萨博西解决方案有限公司 向水下井供应用于压井和去垢的液体的方法和设备
US20140251633A1 (en) * 2013-03-11 2014-09-11 Bp Corporation North America Inc. Subsea Well Intervention System and Methods
EP1917448A4 (fr) * 2005-08-02 2017-09-20 Transocean Offshore Deepwater Drilling Inc. Systeme modulaire d'alimentation en liquide de secours
US20180066485A1 (en) * 2015-03-24 2018-03-08 Fmc Kongsberg Subsea As Modular system and method for controlling subsea operations
US10048673B2 (en) * 2014-10-17 2018-08-14 Hydril Usa Distribution, Llc High pressure blowout preventer system
CN111089090A (zh) * 2019-10-30 2020-05-01 润琛液压机械南通有限公司 一种微型挖掘机手动液压多路阀
WO2024181867A1 (fr) * 2023-02-27 2024-09-06 Ccb Subsea As Distribueur à tiroir cylindrique, soupape de séquence comprenant le distribueur à tiroir cylindrique, et procédé de fonctionnement de la soupape

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486556A (en) * 1967-05-01 1969-12-30 Stewart & Stevenson Inc Jim Underwater connecting apparatus
US3516491A (en) * 1963-10-14 1970-06-23 Hydril Co Underwater control system
US3530885A (en) * 1966-10-19 1970-09-29 Rockwell Mfg Co Wellhead assembly

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1540645A (fr) * 1967-10-11 1968-09-27 Rockwell Mfg Co Tête de puits

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516491A (en) * 1963-10-14 1970-06-23 Hydril Co Underwater control system
US3530885A (en) * 1966-10-19 1970-09-29 Rockwell Mfg Co Wellhead assembly
US3486556A (en) * 1967-05-01 1969-12-30 Stewart & Stevenson Inc Jim Underwater connecting apparatus

Cited By (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034774A (en) * 1975-07-07 1977-07-12 Lone Star Gas Company Low point control system
US4174000A (en) * 1977-02-26 1979-11-13 Fmc Corporation Method and apparatus for interfacing a plurality of control systems for a subsea well
EP0009364A2 (fr) * 1978-09-27 1980-04-02 Fmc Corporation Appareil pour commander hydrauliquement à distance un dispositif de contrôle d'un puits sous-marin
EP0009364A3 (en) * 1978-09-27 1980-05-28 Fmc Corporation Apparatus for extending control from a surface location to a subsea station
US4337829A (en) * 1979-04-05 1982-07-06 Tecnomare, S.P.A. Control system for subsea well-heads
US4355547A (en) * 1979-05-30 1982-10-26 Bl Cars Limited Continuously variable ratio transmission
WO1982003887A1 (fr) * 1981-05-01 1982-11-11 Hurta Gary Lee Commande hydraulique d'une installation de puits sous-marin
US4497369A (en) * 1981-08-13 1985-02-05 Combustion Engineering, Inc. Hydraulic control of subsea well equipment
US4687179A (en) * 1983-03-21 1987-08-18 Smith Gordon M Automatic valve actuator and control system
WO1987001158A1 (fr) * 1985-08-12 1987-02-26 Cbv Indústria Mecânica S.A. Module a vannes, notamment pour puits de petrole sous-marins
WO1987001157A1 (fr) * 1985-08-12 1987-02-26 Cbv Indústria Mecânica S.A. Module a vannes, notamment pour puits de petrole sous-marins
WO1987001159A1 (fr) * 1985-08-12 1987-02-26 Cbv Indústria Mecânica S.A. Module a vannes, notamment pour puits de petrole submarins
WO1988003596A1 (fr) * 1986-11-11 1988-05-19 Myrmidon Subsea Controls Ltd Systemes et dispositifs sous-marins
WO1997023708A1 (fr) * 1995-12-22 1997-07-03 Sietse Koopmans Beheer B.V. Dispositif pour tete de puits
US6046685A (en) * 1996-09-23 2000-04-04 Baker Hughes Incorporated Redundant downhole production well control system and method
US6161618A (en) * 1998-08-06 2000-12-19 Dtc International, Inc. Subsea control module
GB2357537A (en) * 1998-08-06 2001-06-27 Dtc Internat Inc Subsea control module
GB2357537B (en) * 1998-08-06 2002-11-20 Dtc Internat Inc Subsea control module
WO2000008297A1 (fr) * 1998-08-06 2000-02-17 Dtc International, Inc. Module de commande sous-marin
US6484806B2 (en) 2001-01-30 2002-11-26 Atwood Oceanics, Inc. Methods and apparatus for hydraulic and electro-hydraulic control of subsea blowout preventor systems
US20050039923A1 (en) * 2003-08-21 2005-02-24 Philip Howe Well control means
US7306043B2 (en) 2003-10-24 2007-12-11 Schlumberger Technology Corporation System and method to control multiple tools through one control line
US20050087344A1 (en) * 2003-10-24 2005-04-28 Schlumberger Technology Corporation System and Method to Control Multiple Tools Through One Control Line
US20070173957A1 (en) * 2004-02-20 2007-07-26 Fmc Kongsberg Subsea As Subsea control system
WO2005081077A2 (fr) * 2004-02-20 2005-09-01 Fmc Kongsberg Subsea As Systeme de commande sous-marin
US8806092B2 (en) 2004-02-20 2014-08-12 Fmc Kongsberg Subsea As Control system for a subsea installation
WO2005081077A3 (fr) * 2004-02-20 2006-02-02 Fmc Kongsberg Subsea As Systeme de commande sous-marin
US7222674B2 (en) * 2004-08-20 2007-05-29 Oceaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US20060201682A1 (en) * 2004-08-20 2006-09-14 Oceaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US20060201683A1 (en) * 2004-08-20 2006-09-14 Ocaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US20060201681A1 (en) * 2004-08-20 2006-09-14 Oceaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US7216714B2 (en) * 2004-08-20 2007-05-15 Oceaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US7216715B2 (en) * 2004-08-20 2007-05-15 Oceaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US20060037758A1 (en) * 2004-08-20 2006-02-23 Oceaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US20140048275A1 (en) * 2004-08-20 2014-02-20 Oceaneering International, Inc. Modular, Distributed, ROV Retrievable Subsea Control System, Associated Deepwater Subsea Blowout Preventer Stack Configuration, and Methods of Use
US7690433B2 (en) 2004-08-20 2010-04-06 Oceeaneering International, Inc. Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
US7243729B2 (en) * 2004-10-19 2007-07-17 Oceaneering International, Inc. Subsea junction plate assembly running tool and method of installation
US20060090898A1 (en) * 2004-10-19 2006-05-04 Oceaneering International, Inc. Subsea junction plate assembly running tool and method of installation
US7934562B2 (en) * 2004-12-03 2011-05-03 Vetco Gray Scandinavia As Hybrid control system and method
US20080257559A1 (en) * 2004-12-03 2008-10-23 Vetco Gray Scandinavia As Hybrid Control System And Method
US20080264646A1 (en) * 2004-12-22 2008-10-30 Vidar Sten-Halvorsen Modular Actuator for Subsea Valves and Equipment, and Methods of Using Same
US7650943B2 (en) * 2004-12-22 2010-01-26 Vetco Gray Controls Limited Hydraulic control system
US20100078175A1 (en) * 2004-12-22 2010-04-01 Vetco Gray Controls Limited Hydraulic Control System
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Also Published As

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FR2280008B1 (fr) 1977-12-02
GB1470943A (en) 1977-04-21
NO751959L (fr) 1976-01-27
JPS5120001A (fr) 1976-02-17
FR2280008A1 (fr) 1976-02-20
CA1022844A (fr) 1977-12-20

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