US Patent No: 8,156,953

Number of patents in Portfolio can not be more than 2000

Method and device for regulating a pressure in a hydraulic system

ALSO PUBLISHED AS: 20080223467

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Abstract

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The present invention relates to a method for regulating a pressure in a hydraulic system for operating at least one actuator in a subsea installation, having a fluid supply line (102) connected to a source of pressurized fluid (101) at a remote location delivering fluid at a constant pressure to the subsea installation, comprising first and second control valves (103, 105) controlled by an electronic control unit (107), and at least one pressure sensor (106) and an accumulator (104) arranged between the first and second control valve (103, 105), where the pressure in the fluid supply line (102′) to the actuator is regulated by regulating the pressure in the accumulator (104) by adding fluid from the source of pressurized fluid (101) through the first control valve (103) if the pressure is too low or releasing pressure through the second control valve (105) to a fluid return line (120) if the pressure is too high and thereby establishing the desired pressure for operating the actuator. The invention also relates to a device for performing the method.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FMC KONGSBERG SUBSEA ASKONGSBERG25

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tveita, Johannes Tore Kongsberg, NO 2 2

Cited Art Landscape

Patent Info (Count) # Cites Year
 
FMC TECHNOLOGIES, INC. (3)
7,137,450 Electric-hydraulic power unit 20 2004
7,159,662 System for controlling a hydraulic actuator, and methods of using same 10 2004
2008/0264,646 Modular Actuator for Subsea Valves and Equipment, and Methods of Using Same 3 2005
 
NATIONAL OILWELL VARCO, L.P. (2)
2008/0185,046 Subsea pressure systems for fluid recovery 13 2007
7,926,501 Subsea pressure systems for fluid recovery 6 2007
 
SCHLUMBERGER TECHNOLOGY CORPORATION (2)
4,442,902 Remote hydraulic control method and apparatus, notably for underwater valves 21 1981
7,306,043 System and method to control multiple tools through one control line 12 2004
 
ADVANCED ENERGY SYSTEMS, INC. (1)
4,387,783 Fuel-efficient energy storage automotive drive system 23 1980
 
ADVICS CO., LTD. (1)
2005/0012,390 Vehicle motion control apparatus 1 2004
 
Baker International Corporation (1)
4,234,043 Removable subsea test valve system for deep water 31 1977
 
BAROID TECHNOLOGY, INC. (1)
4,923,008 Hydraulic power system and method 22 1989
 
BLUE LEAF I.P., INC. (1)
7,513,521 Suspended drawbar control with selectable operating modes 3 2006
 
DELAWARE CAPITAL FORMATION, INC. (1)
6,298,767 Undersea control and actuation system 7 2000
 
Dynamic Hydraulic Systems, Inc. (1)
4,761,953 Hydraulic elevator mechanism 16 1986
 
FMC CORPORATION (1)
4,407,183 Method and apparatus for hydraulically controlling subsea equipment 16 1979
 
FSSL, INC. (1)
4,497,369 Hydraulic control of subsea well equipment 15 1981
 
HALLIBURTON COMPANY (1)
5,238,070 Differential actuating system for downhole tools 46 1992
 
HUSCO INTERNATIONAL, INC. (1)
7,905,088 Energy recovery and reuse techniques for a hydraulic system 4 2007
 
HYDRIL USA MANUFACTURING LLC (1)
6,102,673 Subsea mud pump with reduced pulsation 79 1999
 
MAC VALVES, INC. (1)
6,095,184 Pressure regulator with integrated control valve, adjustable downstream pressure build and quick exhaust 3 1999
 
Mannesmann Rexroth GmbH (1)
5,070,695 Hydrostatic drive system 22 1988
 
Ross Hill Controls Corporation (1)
4,413,642 Blowout preventer control system 6 1977
 
SOCIETE ANONYME DITE: DELLE-ALSTHOM (1)
4,246,923 Safety device for a pneumo-hydraulic control circuit 1 1978
 
UNISYS CORPORATION (1)
4,880,060 Valve control system 43 1988
 
VARCO SHAFFER, INC. (1)
6,192,680 Subsea hydraulic control system 27 1999
 
VETCO GRAY INC. (1)
5,188,180 Hydraulic circuit for a well tool 10 1991
 
WELLDYNAMICS, INC. (1)
2006/0254,763 Single line control module for well tool actuation 4 2006
 
Other [Check patent profile for assignment information] (3)
4,296,910 Hydraulically controlled safety valve 6 1978
6,202,753 Subsea accumulator and method of operation of same 34 1998
6,983,592 Mobile working machine 3 2002

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
DIAMOND OFFSHORE DRILLING, INC. (1)
8,490,705 Hydraulic control system monitoring apparatus and method 0 2010
 
NATIONAL OILWELL VARCO, L.P. (1)
8,727,018 Charging unit, system and method for activating a wellsite component 0 2013

Maintenance Fees

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3.5 Year Payment $1600.00 $800.00 $400.00 Oct 17, 2015
7.5 Year Payment $3600.00 $1800.00 $900.00 Oct 17, 2019
11.5 Year Payment $7400.00 $3700.00 $1850.00 Oct 17, 2023
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Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
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Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00