EP2136085A2 - Intensificateurs hydrauliques - Google Patents

Intensificateurs hydrauliques Download PDF

Info

Publication number
EP2136085A2
EP2136085A2 EP09160204A EP09160204A EP2136085A2 EP 2136085 A2 EP2136085 A2 EP 2136085A2 EP 09160204 A EP09160204 A EP 09160204A EP 09160204 A EP09160204 A EP 09160204A EP 2136085 A2 EP2136085 A2 EP 2136085A2
Authority
EP
European Patent Office
Prior art keywords
piston
low pressure
cylinder
chamber
high pressure
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.)
Withdrawn
Application number
EP09160204A
Other languages
German (de)
English (en)
Other versions
EP2136085A3 (fr
Inventor
Simon David Gill
Timothy James Roberts
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.)
Baker Hughes International Treasury Services Ltd
Original Assignee
Vetco Gray Controls 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 Vetco Gray Controls Ltd filed Critical Vetco Gray Controls Ltd
Publication of EP2136085A2 publication Critical patent/EP2136085A2/fr
Publication of EP2136085A3 publication Critical patent/EP2136085A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/02Surface sealing or packing
    • E21B33/03Well heads; Setting-up thereof
    • E21B33/035Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/0355Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well heads
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/105Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids

Definitions

  • the present invention relates to hydraulic intensifiers.
  • Hydraulic intensifiers are devices that generate high hydraulic pressure from a low pressure source. They are, typically, employed in subsea wells such as hydrocarbon production or injection wells, to provide a source of high pressure hydraulic fluid for the operation of hydraulically actuated devices, such as valves and flow control chokes. Such wells are, typically, supplied with low pressure hydraulic fluid, via an umbilical, which can be in excess of 100 Km in length The supply of high pressure fluid via the umbilical is not favoured by well operators, as a high pressure feed within the umbilical, needing a much greater wall thickness than usual, results in much greater umbilical and handling costs.
  • Intensifiers use relatively large cross-sectional area pistons, operating at low pressure, to actuate small cross-sectional area pistons, to generate high pressures, thus utilising the mechanical advantage of the ratios of the piston cross-sectional areas to 'intensify' the pressure.
  • two sets of pistons are utilised which operate alternately to sustain a continuous flow of fluid.
  • the alternate operation of the piston sets is controlled by a complicated arrangement of valves and springs and since these and the piston sets are integrated into one assembly, current hydraulic intensifiers are complicated devices, which are difficult to manufacture and thus of high cost. Furthermore, they are heavy devices, typically 37 Kg, and are prone to a multiplicity of problems which include failure of 'slipper' seals and changeover valves, sensitivity to contamination and a tendency to 'lock-up' due to pressure in their return lines. Repair requires the complete removal and strip down of the assembly which is also expensive, and new designs require full approval testing before they can be employed.
  • GB-A-2 275 969 discloses a hydraulic intensifier comprising two sets of high and low pressure pistons for the compression of low pressure liquid, the piston sets being coupled together by the slider of a pilot valve so as to act in mutual opposition, the low pressure pistons of the piston sets being driven by low pressure liquid supplied by way of a changeover valve and the changeover valve being changed over at the end of each stroke of the pilot valve to reverse the motion of the piston sets, the changeover valve being effective to maintain a supply of low pressure liquid to drive the piston sets throughout the stroke of the pilot valve.
  • a hydraulic intensifier comprising:
  • the hydraulic intensifier comprises:
  • a hydraulic intensifier comprising:
  • low pressure hydraulic fluid could be supplied to the chambers of the high pressure cylinders via respective ones of first and second check valves, said chambers of the high pressure cylinders being coupled with said high pressure output via respective ones of third and fourth check valves.
  • a hydraulic intensifier according to the invention could comprise means coupled to said electronic means for sensing pressure of hydraulic fluid at said high pressure output and causing the or each directional control valve not to supply hydraulic fluid to the chamber or chambers of the low pressure cylinder or cylinders in response to the sensed pressure being at a required value.
  • Said electronic means could comprise a bistable device.
  • a hydraulic intensifier according to the invention could comprise a hydraulic accumulator coupled with said high pressure output.
  • a hydraulic intensifier according to the invention could be one for use in a subsea well.
  • said electronic means could be provided via a subsea electronics module for a subsea well and/or the or each directional control value could be provided by a directional control valve of a subsea control module for a subsea well.
  • a method of producing high pressure hydraulic fluid comprising:
  • the method comprises:
  • the present invention enables a modular hydraulic intensifier which utilises standard approved directional control valves (DCVs) which are controlled electronically, in conjunction with piston sets sealed with proven standard approved seals.
  • DCVs directional control valves
  • By being modular, such an intensifier can be serviced by the replacement of individual components, most of which are standard devices which will already be held as spares for the rest of the well control system.
  • FIG. 1 The single figure of the accompanying drawing shows, diagrammatically, a hydraulic intensifier for a subsea hydrocarbon extraction or injection well.
  • Two identical piston and cylinder assemblies 1 and 2 are shown in sectioned view, whereas the rest of the hydraulic circuitry is shown schematically.
  • Each piston assembly has a large cross-sectional area piston 3 or 3' in the chamber 4 or 4' of a low pressure cylinder (sealed by standard approved sealing rings 5 and 6 or 5' and 6') and coupled to a smaller cross-sectional area piston 7 or 7' in the chamber 8 or 8' of a high pressure cylinder (sealed with an approved sealing ring 9 or 9').
  • each low pressure cylinder is fitted with a buffer 10 or 10', manufactured from a resilient, hydraulic fluid resistant material, to minimise the impact of a fast-returning piston.
  • the operation of each of the piston assemblies 1 and 2 is controlled, alternately, by respective ones of standard solenoid-operated directional control valves (DCVs) 11 and 12, each of which is supplied by hydraulic fluid from a low pressure (LP) source 13, typically via the well umbilical.
  • the solenoids of the DCVs 11 and 12 are electrically energised alternately from a dc power source switched by a bistable electronic device 14 such as a multivibrator and each DCV is coupled to the chamber 4 or 4' of the respective low pressure cylinder via a respective restrictor 15 or 16.
  • Source 13 is also connected to the chambers 8 and 8' of the high pressure cylinders via check valves 17 and 18 respectively. Also, each of the chambers 8 and 8' is connected to a high pressure (HP) intensifier output line 19 via check valves 20 and 21 respectively, reference numeral 22 designating a hydraulic accumulator connected with line 19 and reference numeral 23 designating a pressure switch connected to device 14. Reference numeral 24 designates a return line for excess fluid.
  • HP high pressure
  • the mode of operation of the intensifier is as follows.
  • low pressure hydraulic fluid from the source 13 primes the system and additionally provides a continuous supply of hydraulic fluid to the chambers 8 and 8' of the high pressure cylinders, via check valves 17 and 18 respectively.
  • the solenoid of DCV 11 has been de-energised and that of DCV 12 has been energised so that piston 3' has been driven by low pressure fluid that entered chamber 4'.
  • the solenoid of DCV 11 is energised by dc power, switched by the device 14, which allows low pressure hydraulic fluid to operate the piston 3 in the chamber 4 of the low pressure cylinder of the piston/cylinder assembly 1, the solenoid of DCV 12 being de-energised.
  • the rate of movement of the piston 3 is controlled by the hydraulic restrictor 15.
  • the resultant operation of piston 7 forces hydraulic fluid from the chamber 8 of the high pressure cylinder of assembly 1 at high pressure (HP), via check valve 20, to the intensifier output line 19 and into hydraulic accumulator 22.
  • the check valve 17 will close to isolate the generated high pressure from the low pressure source.
  • the piston 7' in the piston/cylinder assembly 2 will be forced downwards, with the hydraulic fluid transferring from the chamber 4' to the chamber 8' via the DCV 12, whose quiescent state is to switch flow via the return path as indicated by arrow 25, whilst at the same time the chamber 8' of the high pressure cylinder of assembly 2 is filled by the low pressure source 13 via the check valve 18.
  • the transfer of fluid from chamber 4' to chamber 8', in the flow direction 25 minimises the consumption of hydraulic fluid.
  • the device 14 will change state, thus removing dc power from the solenoid of DCV 11 and applying dc power to the solenoid of DCV 12, allowing the low pressure fluid to operate the piston 3' in the piston/cylinder assembly 2, so that high pressure fluid is pumped via check valve 21 to the intensifier output line 19 and to the accumulator 22.
  • the DCVs 11 and 12 operate alternately, providing alternate pumping by the piston/cylinder assemblies 1 and 2 of high pressure fluid to the accumulator 22. Excess fluid from the process is exhausted via return line 24 as for existing intensifiers. The pumping process continues until the required high pressure is achieved at the accumulator 22 as sensed by pressure switch 23, which then switches off the dc power to the DCV solenoids via device 14.
  • the device 14 may be dispensed with in a typical well installation, since control of the solenoids of the DCVs can be effected by the subsea control module (SCM) of the well.
  • SCM subsea control module
  • This module already houses DCVs and a subsea electronics module (SEM) to electronically control them, typically by an electronic processor driving power amplifiers to operate the DCV solenoids. It would therefore be a relatively simple addition to the SEM to incorporate the functions of the device 14 within the software of the SCM processor, and the necessary solenoid power drivers to the SCM.
  • the intensifier DCVs could be housed in the SCM.
  • the hydraulic accumulator 22 may not be necessary for some installations.
  • the intensifier could use a single piston/cylinder arrangement.
  • twin arrangement described provides redundancy in the event of a failure and is therefore generally the preferred option.
  • the DCVs are standard-approved devices, a main advantage of using the same to control the intensifier being that they would not require an expensive test for type approval in a subsea well environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
EP09160204A 2008-06-19 2009-05-14 Intensificateurs hydrauliques Withdrawn EP2136085A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0811205A GB2461061A (en) 2008-06-19 2008-06-19 Subsea hydraulic intensifier with supply directional control valves electronically switched

Publications (2)

Publication Number Publication Date
EP2136085A2 true EP2136085A2 (fr) 2009-12-23
EP2136085A3 EP2136085A3 (fr) 2010-06-30

Family

ID=39672519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09160204A Withdrawn EP2136085A3 (fr) 2008-06-19 2009-05-14 Intensificateurs hydrauliques

Country Status (5)

Country Link
US (1) US20090317267A1 (fr)
EP (1) EP2136085A3 (fr)
AU (1) AU2009202431A1 (fr)
BR (1) BRPI0901915A2 (fr)
GB (1) GB2461061A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2995039A1 (fr) * 2012-09-03 2014-03-07 Emmanuel Desire Didier Generateur de pression ou le surpresseur
CN103670940A (zh) * 2014-01-08 2014-03-26 洛阳飓鸿环保技术有限公司 一种能量转换型发电装置
WO2014144916A2 (fr) 2013-03-15 2014-09-18 Transocean Innovation Labs Ltd Pression de suralimentation dans un système de puits sous-marin
EP3722619A1 (fr) * 2019-04-11 2020-10-14 Piston Power s.r.o. Agencement amplificateur de pression hydraulique
EP3872353A1 (fr) * 2020-02-26 2021-09-01 Hydrosaar GmbH Installation d'alimentation hydraulique pour un consommateur

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8225606B2 (en) 2008-04-09 2012-07-24 Sustainx, Inc. Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
US20110266810A1 (en) 2009-11-03 2011-11-03 Mcbride Troy O Systems and methods for compressed-gas energy storage using coupled cylinder assemblies
WO2009126784A2 (fr) 2008-04-09 2009-10-15 Sustainx, Inc. Systèmes et procédés de stockage et de récupération d’énergie à l’aide de gaz comprimé
US7802426B2 (en) 2008-06-09 2010-09-28 Sustainx, Inc. System and method for rapid isothermal gas expansion and compression for energy storage
US8240140B2 (en) 2008-04-09 2012-08-14 Sustainx, Inc. High-efficiency energy-conversion based on fluid expansion and compression
US8474255B2 (en) 2008-04-09 2013-07-02 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US20100307156A1 (en) 2009-06-04 2010-12-09 Bollinger Benjamin R Systems and Methods for Improving Drivetrain Efficiency for Compressed Gas Energy Storage and Recovery Systems
US8250863B2 (en) 2008-04-09 2012-08-28 Sustainx, Inc. Heat exchange with compressed gas in energy-storage systems
US8037678B2 (en) 2009-09-11 2011-10-18 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
US8677744B2 (en) 2008-04-09 2014-03-25 SustaioX, Inc. Fluid circulation in energy storage and recovery systems
US8448433B2 (en) 2008-04-09 2013-05-28 Sustainx, Inc. Systems and methods for energy storage and recovery using gas expansion and compression
US8359856B2 (en) 2008-04-09 2013-01-29 Sustainx Inc. Systems and methods for efficient pumping of high-pressure fluids for energy storage and recovery
US7958731B2 (en) 2009-01-20 2011-06-14 Sustainx, Inc. Systems and methods for combined thermal and compressed gas energy conversion systems
US8479505B2 (en) 2008-04-09 2013-07-09 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
WO2010105155A2 (fr) 2009-03-12 2010-09-16 Sustainx, Inc. Systèmes et procédés destinés à améliorer le rendement de transmission pour le stockage d'énergie sous forme de gaz comprimé
US8104274B2 (en) 2009-06-04 2012-01-31 Sustainx, Inc. Increased power in compressed-gas energy storage and recovery
BR112012016009A2 (pt) * 2009-12-29 2016-08-16 3M Innovative Properties Co sistema de filtração água em água com dispositivo de medicação de precisão
US8171728B2 (en) 2010-04-08 2012-05-08 Sustainx, Inc. High-efficiency liquid heat exchange in compressed-gas energy storage systems
US8191362B2 (en) 2010-04-08 2012-06-05 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8234863B2 (en) 2010-05-14 2012-08-07 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8495872B2 (en) 2010-08-20 2013-07-30 Sustainx, Inc. Energy storage and recovery utilizing low-pressure thermal conditioning for heat exchange with high-pressure gas
EP2447545B1 (fr) 2010-11-02 2015-01-07 Vetco Gray Controls Limited Intensificateurs haute pression
US8578708B2 (en) 2010-11-30 2013-11-12 Sustainx, Inc. Fluid-flow control in energy storage and recovery systems
US20120297772A1 (en) 2011-05-17 2012-11-29 Mcbride Troy O Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems
WO2013106115A2 (fr) 2011-10-14 2013-07-18 Sustainx, Inc. Gestion de volume mort dans des systèmes de stockage et de récupération d'énergie à gaz comprimé
US9140090B2 (en) * 2011-10-19 2015-09-22 Shell Oil Company Subsea pressure reduction system
FI127687B (fi) * 2012-03-20 2018-12-14 Aalto Korkeakoulusaeaetioe Adaptiivinen hydraulinen paineenkehitin
US20140224498A1 (en) * 2013-02-08 2014-08-14 Oceaneering International, Inc. System and Method to Improve Operation of Hydraulic Pump for Subsea Service
CN103486097A (zh) * 2013-10-10 2014-01-01 西安天宇重工有限公司 一种大型液压机的活塞式增压器
WO2015070114A1 (fr) * 2013-11-08 2015-05-14 Kmt Waterjet Systems Inc. Système et commande de pompe à injection
WO2016079251A1 (fr) * 2014-11-21 2016-05-26 Des S.R.L. Multiplicateur de débit d'écoulement de fluide
NO20160240A1 (en) * 2016-02-12 2017-08-14 Fmc Kongsberg Subsea As Pump
ES2734307T3 (es) * 2017-03-03 2019-12-05 Pistonpower Aps Intensificador de presión hidráulica
EP3369929B1 (fr) 2017-03-03 2019-04-24 PistonPower ApS Amplificateur de pression
EP3369927B1 (fr) 2017-03-03 2019-04-24 PistonPower ApS Amplificateur de pression
EP3369930B1 (fr) 2017-03-03 2019-05-08 PistonPower ApS Intensificateur de pression hydraulique à double action
WO2019160538A1 (fr) 2018-02-14 2019-08-22 Halliburton Energy Services, Inc. Pompe d'intensification modifiable en intensité
US11920579B2 (en) 2018-10-05 2024-03-05 Halliburton Energy Services, Inc. Compact high pressure, high life intensifier pump system
SG11202100692TA (en) 2018-12-19 2021-02-25 Halliburton Energy Services Inc Methods and tools to deploy downhole elements
WO2020216440A1 (fr) * 2019-04-24 2020-10-29 Volvo Construction Equipment Ab Dispositif hydraulique, système hydraulique et machine de travail
US11261697B2 (en) * 2019-06-24 2022-03-01 Onesubsea Ip Uk Limited Modular hydraulic intensification system for downhole equipment function and chemical injection services
WO2023048044A1 (fr) * 2021-09-21 2023-03-30 イーグル工業株式会社 Circuit de circulation de fluide
US11808289B2 (en) * 2021-10-25 2023-11-07 Deere & Company Fluid pressure boost system and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275969A (en) 1993-03-01 1994-09-14 Europ Gas Turbines Ltd Hydraulic intensifier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT976905B (it) * 1973-01-16 1974-09-10 Consiglio Nazionale Ricerche Apparato per fornire una pressione variaile nel tempo con elegge prestabilita
DE3640236A1 (de) * 1986-11-25 1988-06-01 Rexroth Mannesmann Gmbh Anordnung zum erzeugen hoher hydraulischer druecke
JP3019671B2 (ja) * 1993-05-27 2000-03-13 ダイキン工業株式会社 超高圧制御装置
US6651749B1 (en) * 2000-03-30 2003-11-25 Halliburton Energy Services, Inc. Well tool actuators and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275969A (en) 1993-03-01 1994-09-14 Europ Gas Turbines Ltd Hydraulic intensifier

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2995039A1 (fr) * 2012-09-03 2014-03-07 Emmanuel Desire Didier Generateur de pression ou le surpresseur
WO2014144916A2 (fr) 2013-03-15 2014-09-18 Transocean Innovation Labs Ltd Pression de suralimentation dans un système de puits sous-marin
EP2971453A4 (fr) * 2013-03-15 2017-05-10 Transocean Sedco Forex Ventures Limited Pression de suralimentation dans un système de puits sous-marin
US10240430B2 (en) 2013-03-15 2019-03-26 Transocean Sedco Forex Ventures Limited Supercharging pressure in a subsea well system
CN103670940A (zh) * 2014-01-08 2014-03-26 洛阳飓鸿环保技术有限公司 一种能量转换型发电装置
EP3722619A1 (fr) * 2019-04-11 2020-10-14 Piston Power s.r.o. Agencement amplificateur de pression hydraulique
EP3872353A1 (fr) * 2020-02-26 2021-09-01 Hydrosaar GmbH Installation d'alimentation hydraulique pour un consommateur

Also Published As

Publication number Publication date
BRPI0901915A2 (pt) 2010-04-13
EP2136085A3 (fr) 2010-06-30
GB0811205D0 (en) 2008-07-23
AU2009202431A1 (en) 2010-01-14
GB2461061A (en) 2009-12-23
US20090317267A1 (en) 2009-12-24

Similar Documents

Publication Publication Date Title
EP2136085A2 (fr) Intensificateurs hydrauliques
US7287595B2 (en) Electric-hydraulic power unit
CN103079769B (zh) 使用在用于处理岩石和混凝土的设备中的液压冲击机构
US20060204375A1 (en) Pressure driven pumping system
WO2001061144A1 (fr) Systeme numerique de commande hydraulique pour un puits
EP1498614A3 (fr) Vérin électro-hydrostatique pourvu d'un dispositif de sécurité positif
US20230141425A1 (en) Hydraulic powering system and method of operating a hydraulic powering system
CN112727818B (zh) 凿岩机的液压控制系统
CN103201521B (zh) 高压增强器
CN105927182B (zh) 一种基于环境压力的新型封隔器
WO2010111158A2 (fr) Système de soupapes actives de pompage de boue
EP1138872A1 (fr) Actionneurs d'un outil de puits et procédé
CA2604654A1 (fr) Systeme de commande proportionnelle directe en surface pour duse de fond
NL2014795B1 (en) Subsea multipiston pump module and subsea multistage pump.
US20080142269A1 (en) Bi stable actuator and drilling system inlcuding same
CN1961152B (zh) 用于双泵缸泥浆泵的驱动设备及其操作方法
GB2359871A (en) Electrohydraulic valve actuator
NO337771B1 (en) Percussive hammering assembly
RU2241854C1 (ru) Гидропривод глубинного штангового насоса
JPS56138502A (en) Oil pressure servo driving device
RU2125186C1 (ru) Привод насосной скважинной установки
RU2134360C1 (ru) Гидравлический привод подъемного устройства
NO329550B1 (no) Laveffekt, hydraulisk miniatyraktuator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20101231