WO1998020257A1 - Inverted accumulator - Google Patents

Inverted accumulator Download PDF

Info

Publication number
WO1998020257A1
WO1998020257A1 PCT/NO1997/000294 NO9700294W WO9820257A1 WO 1998020257 A1 WO1998020257 A1 WO 1998020257A1 NO 9700294 W NO9700294 W NO 9700294W WO 9820257 A1 WO9820257 A1 WO 9820257A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
cylinder
low pressure
pressure
water
Prior art date
Application number
PCT/NO1997/000294
Other languages
French (fr)
Inventor
Eldar Lien
Original Assignee
Selantic Industrier A/S
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 Selantic Industrier A/S filed Critical Selantic Industrier A/S
Priority to AU50707/98A priority Critical patent/AU5070798A/en
Publication of WO1998020257A1 publication Critical patent/WO1998020257A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/04—Manipulators for underwater operations, e.g. temporarily connected to well heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator

Definitions

  • the invention concerns a device for execution of a task under water by means of a piston in a cylinder.
  • a device for execution of a task under water by means of a piston in a cylinder.
  • Such a device is described hereinafter as an inverted accumulator and is intended for various subsea applications where sea water is an operating medium.
  • the device according to the invention is characterized by the features presented in the patent claims.
  • the invention is based on the fact that energy can be stored in a mechanical unit in the form of a piston cylinder device, wherein the chamber on one side of the piston has a low pressure in relation to the prevailing pressure outside the chamber.
  • the low pressure chamber may, e.g., have a pressure of one atmosphere. When it is lowered beneath the water, a pressure difference will arise in relation to the surrounding water. By opening access to the cylinder on one side of the piston, opposite the low pressure side, due to the water pressure the piston will be pushed one piston stroke over to the other side, thereby enabling it to execute a task in the form of a once-only operation.
  • Such an opening can be performed via a remotely controlled valve, such as a two-way valve, which gives the surrounding water and its pressure access to one side of the piston.
  • a remotely controlled valve such as a two-way valve, which gives the surrounding water and its pressure access to one side of the piston.
  • the low pressure side can be connected to a low pressure chamber, in which the air in the low pressure chamber is compressed. By turning the valve it will be possible to connect this low pressure chamber to the opposite side of the piston after the stroke has been completed, thus causing the pressure on this side to drop. The surrounding water can then be introduced on what was previously the low pressure side, pushing the piston back and permitting more piston strokes to be performed.
  • the cylinder's openings can also be opened and closed by means of a remotely controlled mechanism such as a so-called ROV, i.e. a remotely operated vessel.
  • ROV remotely controlled mechanism
  • fig. 1 is a principle illustration of a device according to the invention, in a situation where it is opened for a stroke movement
  • fig. 2 shows the device in figure 1 after the valve has been turned
  • fig. 3 shows a device according to the invention intended for use with a remotely controlled mechanism.
  • the drawings illustrate the device according to the invention with a piston 1 which is movable in a cylinder 2, where the two sides of the cylinder are designated by 3 and 4.
  • the two ends of the cylinder are provided with openings which lead to a pipe system which leads to a two-way valve 6.
  • the low pressure side of the cylinder is designated by 4 and in the example shown is in contact with a low pressure chamber 5.
  • the pressure in this area is, e.g., 1 bar.
  • fig. 1 there is illustrated a position for the valve in which it is opened for access from the surrounding water, where the pressure is substantially higher, and the valve may, e.g., be provided at a depth of 100 m or more. Water which flows into the cylinder part 3 forces the piston through the cylinder, thus forcing the air in the part 4 over into the chamber 5. This force can be employed for execution of a work operation on the seabed.
  • the chamber 5 By turning the valve to the position which is illustrated in fig. 2, the chamber 5 will be connected to the opposite side of the piston, i.e. the part 3, with the result that the pressure here is reduced. The water in this part will then flow into the low pressure chamber. On the opposite side, i.e. in the part 4, water now flows in due to the external water pressure, pushing the piston back and thereby enabling more strokes to be performed.
  • the mode of operation is the same in principle, but in this case the control is performed by connecting the openings 7 and 8 to a remotely controlled mechanism such as a remotely operated vessel.
  • a remotely controlled mechanism such as a remotely operated vessel.
  • the device can also be charged, e.g., from a pressure bottle which is located on a remotely operated vessel or by pumping the water out of the device by raising and lowering it in the water and by means of a pressure relief valve.
  • the device will be particularly suitable for use in operations where there is a need for substantial forces (coupling and uncoupling of rig equipment, mooring operations, operation of cylinders for opening/closing covers, jacking of units etc.)
  • a turbine/pump can also be connected in order to convert the energy to the operation of rotating systems (winch, generator).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

An inverted accumulator for underwater use comprises an air-filled low pressure chamber (1) which is lowered down to the seabed. The chamber is connected to a piston/cylinder device (2). The pressure difference will be capable of activating a piston stroke which is used to perform a task, such as opening or closing a valve (3).

Description

Inverted accumulator
The invention concerns a device for execution of a task under water by means of a piston in a cylinder. Such a device is described hereinafter as an inverted accumulator and is intended for various subsea applications where sea water is an operating medium.
The device according to the invention is characterized by the features presented in the patent claims.
The invention is based on the fact that energy can be stored in a mechanical unit in the form of a piston cylinder device, wherein the chamber on one side of the piston has a low pressure in relation to the prevailing pressure outside the chamber. The low pressure chamber may, e.g., have a pressure of one atmosphere. When it is lowered beneath the water, a pressure difference will arise in relation to the surrounding water. By opening access to the cylinder on one side of the piston, opposite the low pressure side, due to the water pressure the piston will be pushed one piston stroke over to the other side, thereby enabling it to execute a task in the form of a once-only operation. Such an opening can be performed via a remotely controlled valve, such as a two-way valve, which gives the surrounding water and its pressure access to one side of the piston. In an advantageous design the low pressure side can be connected to a low pressure chamber, in which the air in the low pressure chamber is compressed. By turning the valve it will be possible to connect this low pressure chamber to the opposite side of the piston after the stroke has been completed, thus causing the pressure on this side to drop. The surrounding water can then be introduced on what was previously the low pressure side, pushing the piston back and permitting more piston strokes to be performed.
Instead of using a valve device, the cylinder's openings can also be opened and closed by means of a remotely controlled mechanism such as a so-called ROV, i.e. a remotely operated vessel. The invention will now be described in more detail by means of two embodiments which are illustrated in the drawings, in which:
fig. 1 is a principle illustration of a device according to the invention, in a situation where it is opened for a stroke movement, fig. 2 shows the device in figure 1 after the valve has been turned, and fig. 3 shows a device according to the invention intended for use with a remotely controlled mechanism.
The drawings illustrate the device according to the invention with a piston 1 which is movable in a cylinder 2, where the two sides of the cylinder are designated by 3 and 4. The two ends of the cylinder are provided with openings which lead to a pipe system which leads to a two-way valve 6. The low pressure side of the cylinder is designated by 4 and in the example shown is in contact with a low pressure chamber 5. The pressure in this area is, e.g., 1 bar. In fig. 1 there is illustrated a position for the valve in which it is opened for access from the surrounding water, where the pressure is substantially higher, and the valve may, e.g., be provided at a depth of 100 m or more. Water which flows into the cylinder part 3 forces the piston through the cylinder, thus forcing the air in the part 4 over into the chamber 5. This force can be employed for execution of a work operation on the seabed.
By turning the valve to the position which is illustrated in fig. 2, the chamber 5 will be connected to the opposite side of the piston, i.e. the part 3, with the result that the pressure here is reduced. The water in this part will then flow into the low pressure chamber. On the opposite side, i.e. in the part 4, water now flows in due to the external water pressure, pushing the piston back and thereby enabling more strokes to be performed.
In the embodiment in fig. 3 the mode of operation is the same in principle, but in this case the control is performed by connecting the openings 7 and 8 to a remotely controlled mechanism such as a remotely operated vessel. The device can also be charged, e.g., from a pressure bottle which is located on a remotely operated vessel or by pumping the water out of the device by raising and lowering it in the water and by means of a pressure relief valve. The device will be particularly suitable for use in operations where there is a need for substantial forces (coupling and uncoupling of rig equipment, mooring operations, operation of cylinders for opening/closing covers, jacking of units etc.) In the water flows inside the low pressure chamber a turbine/pump can also be connected in order to convert the energy to the operation of rotating systems (winch, generator).
Due to the increase in activity in deep water the method will be of interest for enabling individual operations to be carried out without the necessity for having energy transferred from the surface.

Claims

PATENT CLAIMS
1. A device for execution of a task under water by means of a piston in a cylinder, characterized in that the cylinder is designed with openings at each end, which can be opened and closed, and that the pressure in the cylinder on one side of the piston is lower than the surrounding pressure.
2. A device according to claim 1 , preferably for performing several piston strokes, characterized in that the low pressure side of the piston is connected to a low pressure chamber, e.g. with a pressure of 1 bar.
3. A device according to claim 1 or 2, characterized in that the opening and closing of the cylinder's openings are controlled by a two-way valve or a remote control mechanism, e.g. from a remotely operated vessel.
PCT/NO1997/000294 1996-11-07 1997-11-07 Inverted accumulator WO1998020257A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU50707/98A AU5070798A (en) 1996-11-07 1997-11-07 Inverted accumulator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO964723A NO964723L (en) 1996-11-07 1996-11-07 Inverted accumulator
NO964723 1996-11-07

Publications (1)

Publication Number Publication Date
WO1998020257A1 true WO1998020257A1 (en) 1998-05-14

Family

ID=19900016

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1997/000294 WO1998020257A1 (en) 1996-11-07 1997-11-07 Inverted accumulator

Country Status (3)

Country Link
AU (1) AU5070798A (en)
NO (1) NO964723L (en)
WO (1) WO1998020257A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100337030C (en) * 2005-09-14 2007-09-12 于传祖 Temperature difference power machine
EP2487103A1 (en) * 2011-02-14 2012-08-15 Selantic AS Actuator apparatus
WO2013077740A1 (en) 2011-11-25 2013-05-30 Skjold Lars Underwater shackle
WO2016207457A1 (en) * 2015-06-22 2016-12-29 Gomez Bueno, Andres Lifting device for industrial equipment
US20180252245A1 (en) * 2015-09-10 2018-09-06 Kawasaki Jukogyo Kabushiki Kaisha Underwater actuator and underwater vehicle including the same
CN110524856A (en) * 2019-09-28 2019-12-03 江西德新达智能机械有限公司 A kind of inflation film manufacturing machine cold rinse bank nip rolls and gap adjusting method using cold water tune spacing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095423A (en) * 1977-05-05 1978-06-20 Alexander Moiseevich Gorlov Apparatus for harnessing tidal power
GB2069034A (en) * 1980-02-08 1981-08-19 Bsp Int Foundation Pile drivers
US4964473A (en) * 1988-03-15 1990-10-23 Ihc Holland N.V. Method for driving a hydraulic submerged tool
WO1992019836A1 (en) * 1991-04-26 1992-11-12 Selantic Industrier A/S Engine for performing subsea operations and devices driven by such an engine
WO1994023181A1 (en) * 1993-03-26 1994-10-13 Selantic Industrier A/S Hydraulic jack hammer, for example for marine sampling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095423A (en) * 1977-05-05 1978-06-20 Alexander Moiseevich Gorlov Apparatus for harnessing tidal power
GB2069034A (en) * 1980-02-08 1981-08-19 Bsp Int Foundation Pile drivers
US4964473A (en) * 1988-03-15 1990-10-23 Ihc Holland N.V. Method for driving a hydraulic submerged tool
WO1992019836A1 (en) * 1991-04-26 1992-11-12 Selantic Industrier A/S Engine for performing subsea operations and devices driven by such an engine
WO1994023181A1 (en) * 1993-03-26 1994-10-13 Selantic Industrier A/S Hydraulic jack hammer, for example for marine sampling

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100337030C (en) * 2005-09-14 2007-09-12 于传祖 Temperature difference power machine
EP2487103A1 (en) * 2011-02-14 2012-08-15 Selantic AS Actuator apparatus
WO2013077740A1 (en) 2011-11-25 2013-05-30 Skjold Lars Underwater shackle
US9109659B2 (en) 2011-11-25 2015-08-18 Lars Skjold Underwater shackle
EP2783133A4 (en) * 2011-11-25 2015-09-16 Lars Skjold Underwater shackle
AU2012341137B2 (en) * 2011-11-25 2016-10-13 Møllerodden As Underwater shackle
WO2016207457A1 (en) * 2015-06-22 2016-12-29 Gomez Bueno, Andres Lifting device for industrial equipment
US20180252245A1 (en) * 2015-09-10 2018-09-06 Kawasaki Jukogyo Kabushiki Kaisha Underwater actuator and underwater vehicle including the same
EP3348845A4 (en) * 2015-09-10 2019-04-10 Kawasaki Jukogyo Kabushiki Kaisha Underwater actuator and submersible provided with same
AU2016319229B2 (en) * 2015-09-10 2019-11-21 Kawasaki Jukogyo Kabushiki Kaisha Underwater actuator and underwater vehicle including the same
US10550866B2 (en) 2015-09-10 2020-02-04 Kawasaki Jukogyo Kabushiki Kaisha Underwater actuator and underwater vehicle including the same
CN110524856A (en) * 2019-09-28 2019-12-03 江西德新达智能机械有限公司 A kind of inflation film manufacturing machine cold rinse bank nip rolls and gap adjusting method using cold water tune spacing

Also Published As

Publication number Publication date
AU5070798A (en) 1998-05-29
NO964723D0 (en) 1996-11-07
NO964723L (en) 1998-05-08

Similar Documents

Publication Publication Date Title
US4480966A (en) Apparatus for converting the surface motion of a liquid body into usable power
US3165899A (en) Underwater manipulator with suction support device
US7424917B2 (en) Subsea pressure compensation system
US4674915A (en) Manipulator apparatus for gripping submerged objects
EP2109707B1 (en) A method for recovering fluid from an underwater apparatus submerged in deep water
EP2310665B1 (en) Wave actuated pump and means of connecting same to the seabed
US6192680B1 (en) Subsea hydraulic control system
EP2156016B1 (en) Control system
CN101793132B (en) Rechargeable subsea force generating device and method
MX2007004962A (en) Downhole electrical-to-hydraulic conversion module for well completions.
RU2471959C1 (en) Two-stage underwater actuating mechanisms
JPS5822631B2 (en) Mooring and relay terminal
NO820538L (en) DEVICE FOR UNDERWATER OIL PRODUCTION
US6250199B1 (en) Subsea power module
US3743013A (en) New device for the storage and use of hydraulic and/or pneumatic power, particularly for operation of submerged well heads
CN102658555A (en) Gas drive type underwater disconnecting device
WO1998020257A1 (en) Inverted accumulator
US4669915A (en) Manipulator apparatus with flexible membrane for gripping submerged objects
US7350580B1 (en) Subsea pass thru switching system
US6132145A (en) Pumpskid for suction anchors
NO20200155A1 (en) Reusable gas generator driven pressure supply system
CN205138824U (en) Visual controllable experiment work platform that rams of deep water
CN108699897A (en) The punch actuator that pressure servo-motor for well pressure control apparatus operates
US9140091B1 (en) Apparatus and method for adjusting an angular orientation of a subsea structure
US3418818A (en) Underwater power source

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

122 Ep: pct application non-entry in european phase