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
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Apr 17, 2012
Issued date -
Mar 14, 2008
filing date -
12/075,907
serial no -
In Force
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Abstract
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
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 7,137,450 Electric-hydraulic power unit | 20 | 2004 | |
| 7,159,662 System for controlling a hydraulic actuator, and methods of using same | 9 | 2004 | |
| 2008/0264,646 Modular Actuator for Subsea Valves and Equipment, and Methods of Using Same | 1 | 2005 | |
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| 2008/0185,046 Subsea pressure systems for fluid recovery | 3 | 2007 | |
| 7,926,501 Subsea pressure systems for fluid recovery | 2 | 2007 | |
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| 4,442,902 Remote hydraulic control method and apparatus, notably for underwater valves | 20 | 1981 | |
| 7,306,043 System and method to control multiple tools through one control line | 7 | 2004 | |
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| 4,387,783 Fuel-efficient energy storage automotive drive system | 18 | 1980 | |
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| 2005/0012,390 Vehicle motion control apparatus | 1 | 2004 | |
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| 4,234,043 Removable subsea test valve system for deep water | 28 | 1977 | |
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| 4,923,008 Hydraulic power system and method | 8 | 1989 | |
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| 7,513,521 Suspended drawbar control with selectable operating modes | 3 | 2006 | |
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| 6,298,767 Undersea control and actuation system | 6 | 2000 | |
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| 4,761,953 Hydraulic elevator mechanism | 16 | 1986 | |
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| 4,407,183 Method and apparatus for hydraulically controlling subsea equipment | 16 | 1979 | |
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| 4,497,369 Hydraulic control of subsea well equipment | 15 | 1981 | |
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| 5,238,070 Differential actuating system for downhole tools | 43 | 1992 | |
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| 7,905,088 Energy recovery and reuse techniques for a hydraulic system | 4 | 2007 | |
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| 6,102,673 Subsea mud pump with reduced pulsation | 63 | 1999 | |
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| 6,095,184 Pressure regulator with integrated control valve, adjustable downstream pressure build and quick exhaust | 3 | 1999 | |
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| 5,070,695 Hydrostatic drive system | 21 | 1988 | |
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| 4,413,642 Blowout preventer control system | 5 | 1977 | |
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| 4,246,923 Safety device for a pneumo-hydraulic control circuit | 1 | 1978 | |
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| 4,880,060 Valve control system | 34 | 1988 | |
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| 6,192,680 Subsea hydraulic control system | 14 | 1999 | |
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| 5,188,180 Hydraulic circuit for a well tool | 10 | 1991 | |
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| 2006/0254,763 Single line control module for well tool actuation | 4 | 2006 | |
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| 4,296,910 Hydraulically controlled safety valve | 6 | 1978 | |
| 6,202,753 Subsea accumulator and method of operation of same | 26 | 1998 | |
| 6,983,592 Mobile working machine | 2 | 2002 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
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| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Oct 17, 2015 |
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| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 17, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
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