NO20160773A1 - Hydraulically compensated actuator - Google Patents

Hydraulically compensated actuator Download PDF

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Publication number
NO20160773A1
NO20160773A1 NO20160773A NO20160773A NO20160773A1 NO 20160773 A1 NO20160773 A1 NO 20160773A1 NO 20160773 A NO20160773 A NO 20160773A NO 20160773 A NO20160773 A NO 20160773A NO 20160773 A1 NO20160773 A1 NO 20160773A1
Authority
NO
Norway
Prior art keywords
cylinder
ring shaped
connection means
piston rod
actuator
Prior art date
Application number
NO20160773A
Other versions
NO343533B1 (en
Inventor
Tord Martinsen
Original Assignee
Safelink As
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 Safelink As filed Critical Safelink As
Priority to NO20160773A priority Critical patent/NO343533B1/en
Priority to SG11201808851PA priority patent/SG11201808851PA/en
Priority to SG10201913233VA priority patent/SG10201913233VA/en
Priority to CN201780028271.XA priority patent/CN109477361B/en
Priority to MX2018013619A priority patent/MX2018013619A/en
Priority to MYPI2018703631A priority patent/MY196914A/en
Priority to AU2017262380A priority patent/AU2017262380B2/en
Priority to EP17796464.0A priority patent/EP3455449A4/en
Priority to US16/099,634 priority patent/US10975632B2/en
Priority to PCT/NO2017/050111 priority patent/WO2017196181A1/en
Priority to CA3018541A priority patent/CA3018541A1/en
Priority to BR112018072874-8A priority patent/BR112018072874B1/en
Publication of NO20160773A1 publication Critical patent/NO20160773A1/en
Publication of NO343533B1 publication Critical patent/NO343533B1/en

Links

Classifications

    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/006—Compensation or avoidance of ambient pressure variation
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/09—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52—Floating cranes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

The hydraulically compensated actuator (HCA) is an actuator design intended forsubsea usage. It compensates for water pressure effects that often are problematic.
BACKGROUND OF THE INVENTION
Prior art depth compensated actuators (e.g. US 2008/0251980 A1) do exist. The main difference between the prior art and the invention is howthe depth compensation is perfbrmed. The prior art compensation is performed utilizing an extemal cylinder to compensate the effect of the water pressure acting on the piston rod. This requires a second hydraulic cylinder connected to the main hydraulic cylinder. The main disadvantages of the prior art are that two cylinders are required and that they need to be connected together, which makes it bulky and asymmetrical.
SUMMARY OF THE INVENTION
The main features of the present invention are given in the independent claim. Additional features of the invention are given in the dependent claims.
The novel design of the HCA is use of a traditional actuator combined with a ring based compensation cylinder, all in one compact, symmetrical assembly. The ring based compensation cylinder ensure that the water pressure effect is negated.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig ures 1 is a schematic illustration of the HCA according to the present invention in which the major component parts of the actuator are specifically identified.
Fig ure 2 is an illustration of a prior art depth compensated actuator.
DETAILED DESCRIPTION
As previously mentioned, figure 1 illustrates the HCA (0) with all of the major sub-components numbered 1 through 12. In Table 1 below, the component description is identified. The hydraulically compensated actuator (HCA) (0) can be used vertically, horizontally or at an angle. One application can be as an actuator for subsea valves operated at low pressure; an ot her is as an actuator used at different water depths, typically as part of a heave compensator. When used as a valve actuator the first connection means (8) and the second connection means (9) are connected to either a fixed or movable point. When used as part of a heave compensator, the first connection means (8) and the second connection means (9) are usually connected to the payload and/or the crane. The connection means (8, 9) can be at least one of: a padeye and a clevis, but not limited only thereto. Furtherthe HCA (0) consists of a cylinder (1), with piston (2) and piston rod (3). A second cylinder (6) is mounted concentrically on the upper part (the side with the first connection means (8)), the second cylinder (6) has a larger diameter than the first cylinder (1), but shorter length. The second cylinder features a ring shaped piston (5) connected to a ring shaped piston rod (4). The area ratio between the ring shaped piston (5) and the ring shaped piston rod (4) is equal to or smallerthan the area ratio between the piston (2) and the piston rod (3). A conduit means (7) connects the oil side of the ring shaped cylinder (6) and the cylinder (1) together, effectively cancelling the effect of extemal pressure. The HP side of the cylinder (1) is connected to other hydraulics, such as a piston accumulator or a HPU. The LP side of the ring shaped cylinder (6) can be connected to other hydraulics, such as a hydraulic pump in an active heave compensator, or be gas filled with low pressure gas.

Claims (3)

1. Hydraulically compensated actuator (0) comprising: a first connection means (8) and a second connection means (9) are connected to either a fixed or movable point; a cylinder (1), with piston (2) and piston rod (3); a second cylinder (6) is mounted concentrically on the upper part (the side with the first connection means (8)), the second cylinder (6) has a larger diameter than the first cylinder (1), but shorter length; the second cylinder features a ring shaped piston (5) connected to a ring shaped piston rod (4); a conduit means (7) connects the oil side of the ring shaped cylinder (6) and the cylinder (1) together.
2. Hydraulically compensated actuator (0) according to claim 1 where: the area ratio between the ring shaped piston (5) and the ring shaped piston rod (4) is equal to or smaller than the area ratio between the piston (2) and the piston rod (3).
3. Hydraulically compensated actuator (0) according to claim 1 and 2 where: the connection means (8, 9) can be at least one of: a padeye and a clevis, but not limited only thereto.
NO20160773A 2016-05-08 2016-05-08 Hydraulic depth compensated actuator NO343533B1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
NO20160773A NO343533B1 (en) 2016-05-08 2016-05-08 Hydraulic depth compensated actuator
SG11201808851PA SG11201808851PA (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator
SG10201913233VA SG10201913233VA (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator
CN201780028271.XA CN109477361B (en) 2016-05-08 2017-05-08 Depth compensation actuator and use thereof in connection with a movable heave compensator
MX2018013619A MX2018013619A (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator.
MYPI2018703631A MY196914A (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a tranportable heave compensator
AU2017262380A AU2017262380B2 (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator
EP17796464.0A EP3455449A4 (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator
US16/099,634 US10975632B2 (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator
PCT/NO2017/050111 WO2017196181A1 (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator
CA3018541A CA3018541A1 (en) 2016-05-08 2017-05-08 Depth compensated actuator and use of same in association with a transportable heave compensator
BR112018072874-8A BR112018072874B1 (en) 2016-05-08 2017-05-08 DEPTH COMPENSATED HYDRAULIC ACTUATOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20160773A NO343533B1 (en) 2016-05-08 2016-05-08 Hydraulic depth compensated actuator

Publications (2)

Publication Number Publication Date
NO20160773A1 true NO20160773A1 (en) 2017-11-09
NO343533B1 NO343533B1 (en) 2019-04-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
NO20160773A NO343533B1 (en) 2016-05-08 2016-05-08 Hydraulic depth compensated actuator

Country Status (1)

Country Link
NO (1) NO343533B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643751A (en) * 1969-12-15 1972-02-22 Charles D Crickmer Hydrostatic riser pipe tensioner
US4724970A (en) * 1985-12-28 1988-02-16 Bomag-Menck Gmbh Compensating device for a crane hook
US4964491A (en) * 1989-07-11 1990-10-23 The United States Of America As Represented By The Secretary Of The Navy System for limiting snap load intensity
US20080251980A1 (en) * 2007-04-10 2008-10-16 Matthew Jake Ormond Depth compensated subsea passive heave compensator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643751A (en) * 1969-12-15 1972-02-22 Charles D Crickmer Hydrostatic riser pipe tensioner
US4724970A (en) * 1985-12-28 1988-02-16 Bomag-Menck Gmbh Compensating device for a crane hook
US4964491A (en) * 1989-07-11 1990-10-23 The United States Of America As Represented By The Secretary Of The Navy System for limiting snap load intensity
US20080251980A1 (en) * 2007-04-10 2008-10-16 Matthew Jake Ormond Depth compensated subsea passive heave compensator

Also Published As

Publication number Publication date
NO343533B1 (en) 2019-04-01

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Owner name: SAFELINK AHC AS, NO