GB2520479A - Improvements in or relating to fluid flow devices - Google Patents

Improvements in or relating to fluid flow devices Download PDF

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Publication number
GB2520479A
GB2520479A GB1319482.4A GB201319482A GB2520479A GB 2520479 A GB2520479 A GB 2520479A GB 201319482 A GB201319482 A GB 201319482A GB 2520479 A GB2520479 A GB 2520479A
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GB
United Kingdom
Prior art keywords
fluid flow
flow device
fluid
control means
digital signal
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Withdrawn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
GB1319482.4A
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GB201319482D0 (en
Inventor
Charles Buchan Ritchie
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.)
Score Group Ltd
Original Assignee
Score Group 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 Score Group Ltd filed Critical Score Group Ltd
Priority to GB1319482.4A priority Critical patent/GB2520479A/en
Publication of GB201319482D0 publication Critical patent/GB201319482D0/en
Publication of GB2520479A publication Critical patent/GB2520479A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/02—Valve arrangements for boreholes or wells in well heads
    • E21B34/025—Chokes or valves in wellheads and sub-sea wellheads for variably regulating fluid flow
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/666—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by detecting noise and sounds generated by the flowing fluid
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/02—Devices or arrangements for monitoring coolant or moderator
    • G21C17/032—Reactor-coolant flow measuring or monitoring
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/08—Regulation of any parameters in the plant
    • G21D3/12—Regulation of any parameters in the plant by adjustment of the reactor in response only to changes in engine demand
    • G21D3/14—Varying flow of coolant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Flow Control (AREA)

Abstract

A fluid flow device (10) for a wellhead comprises a fluid input (12) , a fluid output (14), a valve means (21) which controls the flow of fluid from the input to the output, and an actuator (20) which controls the position of the valve means (21). The fluid flow device (10) includes at least one acoustic transducer adapted to measure the acoustic noise generated by fluid flowing through the fluid flow device, and control means adapted to control the actuator in response to the measured acoustic noise. A digital signal converter can be used to transform, by a suitable algorithm, the acoustic noise measured by the transducer into a digital signal, which is then transmitted to the control means and compared to reference signals. The invention allows remote control of the fluid flow device in conjunction with remote monitoring of actual flow conditions in the device.

Description

Improvements in or relating to Fluid Flow Devices The present invention relates to a fluid flow device, through which fluid flows, which is controlled with the assistance of an acoustic transducer to monitor the flow of fluid through the device. In particukr the present invention finds application in any fluid flow system where remote control of the fluid flow is required, for examp'e in wellheads or in the cooling systems of nuclear reactors.
According to a first aspect of the present invention there is provided a fluid flow device comprising: a fluid input, a fluid output, a vthve means which controls the flow of fluid from the input to the output, an actuator which controls the position of the valve means, at least one acoustic transducer adapted to measure the acoustic noise generated by fluid flowing through the fluid flow device, and control means adapted to control the actuator in response to the measured acoustic noise.
The control means may be adapted to receive one or more additional control parameters to control the actuator. The control parameters may include inputs such as the position of the valve means, fluid line pressure upstream and/or downstream of the fluid input and/or output.
The device may further comprise an isolation means to prevent fluid flowing from the input to the output. That is, the device may further comprise a shut off device or valve. This shut off valve may be a gate vthve.
The device may further comprise a reverse fluid flow prevention means to prevent fluid flowing from the output to the input. This means maybe a check valve.
Preferably the device comprises a digital signal converter which transforms the acoustic noise measured by the acoustic transducer to a digital signal.
Preferably the device comprises a digital signal converter (or converters) which transforms the acoustic noise measured by the acoustic transducer and the additional control parameters to a digital signal (or signals).
The control means may include means which reads the digital signal (or signals)) compares it (or them) to a predetermined reference signal corresponding to a required fluid flow rate and provides a control signal to the actuator to change the position of the valve means to thereby change the rate of flow of fluid from the input to the output, towards the required fluid flow rate.
The transformation of the digital signal or signals may be achieved by an algorithm.
The algorithm may include the acoustic noise generated by the fluid flow device and/or the control parameters.
The control means may be local or remote. The digital signal (or signals) may be transmitted via a local network or the internet to the control means. The control means may be microprocessor controlled or controlled by an operator.
The control means may comprise a data acquisition unit which stores and /or transforms the digital signal (or signals].
The valve means may be any suitable valve means which allows quasi-infinite adjustment of flow rate over a range. The valve means may be a butterfly valve.
The fluid flow device may comprise one or more acoustic transducers adapted to measure the acoustic noise generated by the fluid flowing through the fluid flow device.
According to a second aspect of the present invention there is provided a method of controlling fluid flow in a fluid flow device, the method comprising: using an acoustic transducer to measure the acoustic noise generated by fluid flowing through the fluid flow device, creating a signal corresponding to the measured acoustic noise, comparing the signal to a reference signal to determine a required adjustment to the fluid flow in the fluid flow device, generating a control signal corresponding to the required adjustment and using the control signal to control the movement of an actuator in the fluid flow device, and moving a valve means as a result of the movement of the actuator to adjust the fluid flow in the fluid flow device.
The required adjustment can be one of increasing the flow rate, maintaining the flow rate or decreasing the flow rate.
Optionally the required adjustment can include a quantitative increase or decrease.
In other words the required adjustment can indicate by how much the flow rate is to be increased or decreased.
The step of creating a signal corresponding to the measured acoustic noise may include using a digital signal converter to transform the acoustic noise measured by the acoustic transducer to a digital signal.
The step of comparing the signal to a reference signal to determine a required adjustment to the fluid flow in the fluid flow device may be carried out by a control means, for example a computer running a computer program, or it may be carried out by an operator.
The control means may be local or remote. The digital signal may be transmitted via a local network or the internet to the control means. The control means may be microprocessor controlled or controlled by an operator.
The valve means may be any suitable valve means which allows quasi-infinite adjustment of flow rate over a range. The valve means maybe a butterfly valve.
The invention will now be described with reference to the accompanying drawings in which: Figs 1(a) to 1(g) show a fluid flow device according to the present invention in rear elevation, side elevation, front elevation, plan view, bottom view) perspective view and sectional perspective view respectively; and Figs 2(a) to (c) are enlarged views of the views of Figs 1 (a) to (c) respectively.
Figs 1 and 2 show a fluid flow device in the form of a wellhead unit 10. The unit has a fluid input 12, a fluid output 14, and a shut-off valve 16 controlled by an externally mounted handle 18. The shut-off valve 16 in the embodiment illustrated and described here is a gate valve. On top of the wellhead 10 is an actuator 20 which controls the position of a valve means 21 inside the wellhead unit 10. The valve means 21 controls the flow of fluid from the input 12 to the output 14.
Inside the wellhead unit lOis a means of preventing reverse flow 23 (an example of a reverse fluid flow prevention means to prevent fluid flowing in the direction from the output 14 to the input 12). In the embodiment illustrated and described here the means of preventing reverse flow 23 is a check valve.
Inside the wellhead unit 10 is an acoustic transducer (not shown), which acoustically measures the flow rate of fluid through the wellhead. It does this by measuring the acoustic noise generated by fluid flowing through the wellhead.
Different flow rates will produce noise of different frequency and intensity, so that each flow rate has its own acoustic signature.
S
A digital signal converter, which may be a separate component, and may be in the wellhead, or may be integral with the acoustic transducer, transforms the acoustic noise measured by the acoustic transducer into a digital signal, which can then be transmitted to a computer or other control means. The digital signal can be transmitted by wire or wirelessly. The transformation may be achieved by a
suitable algorithm
The control means includes a computer program which reads the digital signal, compares it to a predetermined reference signal corresponding to a required fluid flow rate and calculates whether the valve means 21 needs to be opened or dosed, and optionally by how much, in order to achieve the required fluid flow rate. It can be sufficient simply to determine whether the valve means 21 needs to be opened or closed, since the next iteration will determine whether further adjustment is needed, and iterative step movements of the valve means 21 will result in a closed loop feedback system which will bring the measured flow rate to the required fluid flow rate.
The control means provides a control signal to the actuator to change the position of the valve means 21, according to its calculation, to thereby change the rate of flow of fluid from the input to the output, towards the required fluid flow rate.
As an alternative, the control means can read the digital signal and compare it to a plurality of predetermined reference signals, each corresponding to a predetermined flow rate. The control means then determines the actual flow rate in the wellhead. The predetermined reference signals can be obtained from previous measurements, and can optionally be calibrated against independent flow rate measurements.
However the invention is not limited to the particular method of comparison of the measured digital signal.
If required an operator can carry out the step of reviewing the digital signal and comparing it to a required signal. If the operator is not happy with the received signal, he can use the control system to control the opening or closing of the valve means 21 by an amount selected by the operator. The control means provides a control signal to the actuator to change the position of the valve means 21, according to the amount selected by the operator, to thereby change the rate of flow of fluid from the input to the output as required.
In order to compare the signal, the operator may listen to an acoustic signal obtained by reconversion of the digital signal, and audibly compare the acoustic signal with a reference signal. Alternatively the operator may view a graphic representation of the digital signal, and visually compare the digital signal with a reference signal.
It is to be understood that the comparison may also be carried out automatically by the computer or control means.
The control means may be local or remote. The digital signal may be transmitted via a local network or the internet to the control means. The control means may be microprocessor controlled or controlled by an operator. A remote operator can thus achieve quasi infinite adjustment and fine tuning of the position of the valve means 21.
The control means may comprise a data acquisition unit which stores the digital signal. In this way a historical record of the operation of the wellhead is obtained.
The valve means 21 may be any suitable valve means which allows quasi-infinite adjustment of flow rate over a range. In one embodiment the valve means 21 may be a butterfly valve.
The fluid flow device may comprise one or more valves. The fluid flow device may comprise three separate valves. The first valve may be a parallel, or wedge-shaped, gate valve. The second valve may be a control valve, or actuated choke valve. The third valve maybe a non-return valve.
Between the first valve and the second valve there may be a dead leg 25. The dead leg 25 may have an associated access hole 27. The dead leg 25 may provide work over access to the well or be used for mounting instrumentation which may be a pressure transmitter.
Although the invention has been described with reference to a wellhead, used at the surface of an oil well to provide the interface for drilling and production equipment) the invention can be used in any fluid flow device used in connection with oil production. The invention can also be used in power station cooling systems and any other high pressure industrial processes which involve the flow of large volumes of fluid at pressure, for example the cooling of nuclear reactors.
Furthermore, although the fluid flow device has been described above as comprising at least one acoustic transducer, it should be appreciated that the fluid flow device may comprise one or more acoustic transducers adapted to measure the acoustic noise generated by the fluid flowing through the fluid flow device. In the arrangement where the fluid flow device is used in a wellhead, power station, high pressure industrial process, or indeed any fluid flow system, it should be appreciated that the fluid flow device may comprise a plurality of acoustic transducers which may, for example, be used to monitor the quieter pipework upstream and/or downstream of the fluid flow device. This arrangement may allow the background noise around the fluid flow device to be monitored, which provided a reference noise level to which the noise of the fluid flow device may be compared.
This may be especially useful in noisy plant environments. Also this may be used to establish the shut off performance of the valve means 21, isolation means and reverse flow prevention means when combined with the control means and additional control parameters via a suitable algorithm.
B
Although the control means has been described above as controlling the actuator in response to the measured acoustic noise, it should be appreciated that the control means may control the actuator in response to the measured acoustic noise and/or the control parameters. That is, the control system may accept additional inputs, such as valve position and line pressures, which are then combined with the measured acoustic noise inputs in an algorithm to provide the signal for comparison with the predetermined reference signal, or required set point, to determine the required control signal to the actuator. This provides finer control to the fluid flow device.

Claims (20)

  1. Claims 1. A fluid flow device comprising: a fluid input, a fluid output, a vah'e means which controls the flow of fluid from the input to the output, an actuator which controls the position of the valve means, at least one acoustic transducer adapted to measure the acoustic noise generated by fluid flowing through the fluid flow device, and control means adapted to contrcil the actuator in response to the measured acoustic noise.
  2. 2. A fluid flow device according to claim 1 wherein the control means is adapted to receive one or more additional control parameters to control the actuator.
  3. 3. A fluid flow device according to daim 2 wherein the control parameter(s) include inputs such as the position of the valve means, fluid line pressure upstream and/or downstream of the fluid input and/or output.
  4. 4. A fluid flow device according to any preceding claim further comprising isolation means to prevent fluid flowing from the input to the output
  5. 5. A fluid flow device according to claim 4 wherein the isolation means is a shut off device or valve.
  6. 6. A fluid flow device according to daim 4 or S wherein the isolation means is a gate valve.
  7. 7. A fluid flow device according to any preceding claim further comprising a reverse fluid flow prevention means to prevent fluid flowing from the output to the input.
  8. 8. A fluid flow device according to claim 8 wherein the reverse fluid flow prevention means is a check valve.
  9. 9. A fluid flow device according to any preceding claim further comprising a digital signal converter which transforms the acoustic noise measured by the acoustic transducer to a digital signal.
  10. 10. A fluid flow device according to any preceding claim further comprising a digital signal converter (or converters) which transforms the acoustic noise measured by the acoustic transducer and the additional control parameters to a digital signal (or signals].
  11. 11. A fluid flow device according to claim 10 wherein the control means includes means which reads the digital signal (or signals], compares it (or them] to a predetermined reference signal corresponding to a required fluid flow rate and provides a control signal to the actuator to change the position of the valve means to thereby change the rate of flow of fluid from the input to the output, towards the required fluid flow rate.
  12. 12. A fluid flow device according to claims 10 or 11 wherein the transformation of the digital signal or signals is achieved by an algorithm.
  13. 13. A fluid flow device according to claim 12 wherein the algorithm includes as an input the acoustic noise generated by the fluid flow device and/or the control parameters.
  14. 14. A fluid flow device according to any preceding claim wherein the control means is local to the device.
  15. 15. A fluid flow device according to any of claims 1 to 13 wherein the control means is situated remotely from the device.
  16. 16. A fluid flow device according to claim 15 when dependant on claim 10 or 11 wherein the digital signal (or signals) are transmitted via a local network or the internet to the control means.
  17. 17. A fluid flow device according to any preceding claim wherein the control means indudes a microprocessor
  18. 18. A fluid flow device according to any preceding claim wherein the control means is controlled by an operator.
  19. 19. A fluid flow device according to claims 10 or 11 or any preceding claim dependent on claim 10 or 11 wherein the control means comprises a data acquisition unit which stores and br transforms the digital signal (or signals].
  20. 20. A fluid flow device according to any preceding claim wherein the va've means is any suitable valve means which allows quasi-infinite adjustment of flow rate over a range.22. A fluid flow device according to any preceding claim wherein the valve means is a butterfly valve.23. A fluid flow device according to any preceding claim further comprising one or more acoustic transducers adapted to measure the acoustic noise generated by the fluid flowing through the fluid flow device.24. A method of controlling fluid flow in a fluid flow device, the method comprising: using an acoustic transducer to measure the acoustic noise generated by fluid flowing through the fluid flow device, creating a signal corresponding to the measured acoustic noise, comparing the signal to a reference signal to determine a required adjustment to the fluid flow in the fluid flow device, generating a control signal corresponding to the required adjustment and using the control signal to control the movement of an actuator in the fluid flow device, and moving a valve means as a result of the movement of the actuator to adjust the fluid flow in the fluid flow device.25. A method of controlling fluid flow in a fluid flow device according to claim 24 wherein the required adjustment is selected from the group consisting of: increasing the flow rate, maintaining the flow rate and decreasing the flow rate.26. A method of controlling fluid flow in a fluid flow device according to claim 24 wherein the required adjustment includes a quantitative increase or decrease in flow rate.27. A method of controlling fluid flow in a fluid flow device according to any of claims 24 to 26 wherein the step of creating a signal corresponding to the measured acoustic noise includes using a digital signal converter to transform the acoustic noise measured by the acoustic transducer to a digital signal.28. A method of controlling fluid flow in a fluid flow device according to any of claims 24 to 26 wherein the step of comparing the signal to a reference signal to determine a required adjustment to the fluid flow in the fluid flow device is carried out by a control means.29. A method of controlling fluid flow in a fluid flow device according to claim 28 wherein the control means is local to the area the method is being carried out.30. A method of controlling fluid flow in a fluid flow device according to claim 28 wherein the control means is situated remotely to the area the method is being carried out.31. A method of controlling fluid flow in a fluid flow device according to claim 29 or 30 wherein the digital signal (or signals] are transmitted via a local network or the internet to the control means.32. A method of controlling fluid flow in a fluid flow device according to claim 29 or 30 wherein the control means includes a microprocessor 33. A method of controlling fluid flow in a fluid flow device according to claim 29 or 30 wherein the control means is controlled by an operator.34. A method of controlling fluid flow in a fluid flow device according to claim 29 or 30 wherein the control means comprises a data acquisition unit which stores and br transforms the digital signal (or signals].35. A method of controlling fluid flow in a fluid flow device according to any of claims 24 to 34 wherein the valve means is any suitable valve means which allows quasi-infinite adjustment of flow rate over a range.36. A method of controlling fluid flow in a fluid flow device according to any of claims 24 to 34 wherein the valve means is a butterfly valve.
GB1319482.4A 2013-11-05 2013-11-05 Improvements in or relating to fluid flow devices Withdrawn GB2520479A (en)

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GB2520479A true GB2520479A (en) 2015-05-27

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US20160341028A1 (en) * 2014-12-18 2016-11-24 Halliburton Energy Services, Inc. Blowout rate correction methods and systems
WO2019034498A1 (en) * 2017-08-15 2019-02-21 Ge Oil & Gas Uk Limited Flow induced vibration reduction
WO2019170289A1 (en) * 2018-03-08 2019-09-12 Linde Aktiengesellschaft Gas cylinder flow monitoring
US11487303B2 (en) 2020-01-06 2022-11-01 Johnson Controls Tyco IP Holdings LLP Valve assembly with integrated flow sensor controller

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EP0462432A2 (en) * 1990-06-01 1991-12-27 Valtek Incorporated Integrated process control valve
WO2000029818A1 (en) * 1998-11-18 2000-05-25 Schlumberger Technology Corporation Monitoring characteristics of a well fluid flow
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