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WO2002016931A1 - Measuring relative proportions of dissimilar fluids in a pipe - Google Patents

Measuring relative proportions of dissimilar fluids in a pipe Download PDF

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Publication number
WO2002016931A1
WO2002016931A1 PCT/GB2001/003700 GB0103700W WO0216931A1 WO 2002016931 A1 WO2002016931 A1 WO 2002016931A1 GB 0103700 W GB0103700 W GB 0103700W WO 0216931 A1 WO0216931 A1 WO 0216931A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonator
pipe
electromagnetic radiation
coil
detector
Prior art date
Application number
PCT/GB2001/003700
Other languages
French (fr)
Inventor
Steven Robert Powell
Original Assignee
Abb Offshore Systems Limited
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 Abb Offshore Systems Limited filed Critical Abb Offshore Systems Limited
Priority to AU2001278636A priority Critical patent/AU2001278636A1/en
Publication of WO2002016931A1 publication Critical patent/WO2002016931A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2823—Raw oil, drilling fluid or polyphasic mixtures

Definitions

  • This invention relates to measuring relative proportions of dissimilar fluids in a pipe, for example gas, water and oil.
  • the first type comprises methods involving taking a sample of the oil. flow and analysing it.
  • the other type comprises so-called full flow systems, involving the measurement of the aggregate gas and water content of the entire flow.
  • the invention provides apparatus for measuring the relative proportions of dissimilar fluids in a pipe, the apparatus comprising: a coil resonator, helically wound, in use, around the pipe; a variable frequency source of electromagnetic radiation, arranged to send electromagnetic radiation into the coil; an electromagnetic detector arranged to detect electromagnetic radiation emitted by the resonator, which radiation is indicative of the relative proportions of the fluids in the pipe; characterised in that one of the source and the detector is physically connected to an end portion of the resonator.
  • both the source and the detector are physically connected to opposite end portions of the coil resonator.
  • the provision of direct connection between the electromagnetic source and the coil, and/or the coil and the detector, results in a significantly reduced attenuation between input and output.
  • the invention is particularly suitable for measuring the relative proportions of oil, gas and water in crude oil being extracted from a hydrocarbon well.
  • Figure 1 is a partly sectional side view of prior art apparatus for measuring the relative proportions of dissimilar fluids in a pipe;
  • FIG. 1 schematically illustrates apparatus constructed according to the invention
  • Figure 3 is a partly sectional side view of apparatus constructed according to the invention.
  • Figure 4 is a schematic diagram of a measurement system including the apparatus of Figure 3.
  • a helical coil resonator 1 is shown, which is an electric conductor shaped into a helix.
  • a pipe 2 through which a portion of the fluid of interest is arranged to flow, passes through the coils of the resonator 1.
  • the resonator 1 and pipe 2 are situated in a conductive metal cavity 3.
  • Microwave energy is introduced into the cavity 3 by means of an input coaxial probe 4 and the resulting activity of the resonator 1 can be sensed using a remotely located output coaxial probe
  • the resonant peak of the helical coil resonator 1 for a given input power varies, both in frequency and amplitude, in dependence on the material within the pipe 2.
  • the resonant frequency is affected by the dielectric constant of the material within the pipe 2, while the amplitude of the resonant peak is affected by the absorption of energy by the material within the pipe.
  • the region between the input 4 and output 5 acts as an attenuator, with the degree of attenuation varying in dependence on the relative proportions of the fluid flowing through the pipe 2.
  • the attenuation can be as high as 60-90dB. Consequently, a high gain amplifier is conventionally employed to amplify the signal from the output probe.
  • this signal change can become lost in the noise inherent in such a high gain amplifier.
  • the sensitivity of the device is low.
  • FIG. 2 Apparatus constructed according to the invention is shown in Figure 2.
  • This apparatus also comprises a coil resonator 1 helically wound around a section 2 of pipe.
  • a microwave energy source 6 and a microwave output detector 7, which includes an amplifier 13 and analysing circuitry.
  • the output detector 7 processes signals corresponding to the activity of the resonator 1.
  • At least one of the energy source 6 and output detector 7 are physically connected to the coil resonator itself.
  • both the energy source 6 and output detector 7 are connected to the coil resonator.
  • the energy source 6 is connected to one end portion of the coil resonator 1 by means of a co-axial cable 8, via a first capacitor 9.
  • the output detector 7 is connected to the other end portion of the resonator 1 by means of a co-axial cable 10, via a second capacitor 11.
  • the attenuation between the input and output is much reduced, typically by at least lOdB.
  • the gain of the amplifier 13, which amplifies the output signal can be reduced by a similar amount.
  • the amplifier noise level is reduced, resulting in a much improved output signal-to-noise ratio. This enables much smaller changes of output signal to be measured and results in a device with sufficient dynamic range to allow the desired degree of accuracy of measurement of the fluid characteristics.
  • the capacitors 9, 11 are located close to opposite end portions of the coil resonator 1. A suitable value for the capacitors is in the range of six picofarads.
  • the co-axial cables 8, 10 are screened in the region of the respective capacitors 9, 11.
  • An electrically conductive insulated wire 12 extends between the ends of the cables 8, 10 and is joined to the respective screens.
  • the apparatus shown in Figure 2 comprises a resonant circuit distinct from the prior art apparatus of Figure 1.
  • the pipe 2 is arranged to carry a portion of the dissimilar fluids of interest.
  • the pipe 2 is formed of plastics material, although any electrically insulating material could be used.
  • a suitable plastics material for this application would be polyetheretherketone (PEEK) owing to its high resistance to corrosive substances and stability at high temperatures.
  • PEEK polyetheretherketone
  • the coil resonator 1 is arranged to be helically wound around a section 14 of the pipe and is co-axial with it.
  • the pipe section 14 may be machined with a helical groove having the same dimensions as the resonator 1, so that the resonator is located on the outer surface by the groove.
  • a sleeve 15 is arranged to fit over the coil resonator 1.
  • the internal diameter of the sleeve 15 is chosen so that there is a slight interference fit with the external diameter of the resonator 1, thereby ensuring that the resonator is kept in place. This is especially useful in circumstances where the pipe may be susceptible to vibrations.
  • the apparatus of Figure 3 is mounted within a larger fluid extraction pipe (not shown). Therefore, it is desirable to isolate the resonating circuit from the fluid surrounding the apparatus.
  • the pipe section 14 incorporating the resonator is held within a metal tube 16.
  • the metal tube 16 screens the apparatus within from external electromagnetic fields.
  • the tube 16 also provides protection for the enclosed apparatus from mechanical damage or corrosion, such as might be encountered in a sub-sea hydrocarbon well.
  • O- rings 17, 18 provide a seal between the ends of the metal tube 16 and the pipe 2.
  • the co-axial cables 8, 10 associated with the source of microwave radiation (not shown in this drawing) and the microwave output detector (also not shown in this drawing) are introduced into the metal tube 16 via an aperture 19 sealed by a cable gland 20.
  • a channel in the outer surface of the sleeve 15 is arranged to accommodate the cables 8, 10 and the associated capacitors 9, 11.
  • the insulated wire for connecting the screens of the cables 8, 10 is embedded in the sleeve 15 and is not shown in this drawing.
  • the coaxial cable 8 is connected to a first end portion of the resonator 1 via a first opening in the sleeve 15; a second opening in the sleeve allows the cable 10 to be connected to the other end portion of the resonator 1.
  • the resonator 1 and capacitors 9, 11 are shown symbolically in Figure 4.
  • the source 6 of microwave radiation and microwave detector 7 including amplifier 13 are also represented in this drawing.
  • the source 6 of microwave radiation is an oscillator having an output variable across a range of frequencies.
  • the microwave radiation is supplied directly to an end of the coil resonator 1 via the capacitor 9.
  • a coupler 21 takes a portion of the input power to the resonator 1 and supplies it to the microwave detector 7 as a reference.
  • the coil ' resonator 1 is connected, via capacitor 11, to the detector 7, which detects activity of the resonator. In operation in, for example a hydrocarbon well, a mixture of oil, water and gas flows through the pipe, including the section 14 having the coil resonator.
  • a data analyser and controller included in the circuitry comprising the microwave output detector 7, varies the frequency of the microwave source and plots, for example, the output voltages derived from the output signal of the coil resonator 1.
  • the output detector 7 could alternatively plot the output current, or any other characteristic of the output signal of the coil resonator 1.
  • the output power of the helical coil resonator 1 is plotted against input frequency to produce the resonant peak for the resonator.
  • a measurement of the attenuation of microwave energy provides an indication of the relative proportions of oil, water and gas in the fluid extraction pipe because those three fluids have very different permitivities. It has been found that the resonant frequency of a coil resonator is more sensitive to the properties of material in the vicinity of the coil itself than it is to the properties of material in the centre of the pipeline. This is because the strength of the electric fields generated by the coil are stronger proximate the coil. Therefore, an advantageous arrangement is that of a plurality of coil resonators, such as that illustrated in GB- 2271637.
  • Each coil resonator has a larger circumference than the pipe.
  • the coil resonators are arranged around the pipe so that the axis of each coil is offset from that of the pipe.
  • the resonant peaks of the helical coil will be mainly influenced by the part of the fluid flow adjacent each coil and, since each coil is adjacent different part of the fluid flow, this will allow a map of the distribution of oil, water and gas within the pipe to be produced if required.
  • the number of coils used is a trade-off between increasing accuracy and sensitivity of the system by increasing the number of coils used, and the increase in the cost and bulk the system due to the use of more coils.
  • the microwave oscillator could be replaced by an r.f. oscillator.
  • Helical coil resonators also work at r.f. frequencies (500MHz to 1GHz); the microwave frequency band is from 1 GHz to 20GHz.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electromagnetism (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Apparatus for measuring the relative proportions of dissimilar fluids in a pipe (2) includes a variable frequency source (6) of electromagnetic radiation, arranged to send radiation into a coil resonator (1), which is helically wound around the pipe. A detector (7) detects activity of the resonator. At least one of the source and the detector is physically connected to the resonator, preferably by means of co-axial cables (8, 10). Previously, electromagnetic energy was transmitted into a cavity containing the resonator and detected remotely. This resulted in large attenuation between input and output.

Description

MEASURING RELATIVE PROPORTIONS OF DISSIMILAR FLUIDS IN A
PIPE
This invention relates to measuring relative proportions of dissimilar fluids in a pipe, for example gas, water and oil.
In a hydrocarbon extraction system where, for instance, crude oil is being pumped from the ground, it is desirable to be able to measure the gas and water content of that crude oil.
A number of methods of measuring the gas and water content of crude oil have been proposed. These proposed methods generally fall into two types. The first type comprises methods involving taking a sample of the oil. flow and analysing it. The other type comprises so-called full flow systems, involving the measurement of the aggregate gas and water content of the entire flow.
In general, measurement methods involving sampling have been difficult because the gas and water content of the oil flow tends to be non-homogenous over time, and/or across the width of the pipe. There is, therefore, no guarantee that a sample is representative unless an homogeniser is employed to homogenise the gas, oil and water in the flow. Generally speaking, homogenisers are not completely effective and require power for operation. The need for such power supply can be problematic in subsea environments. As a result, full flow systems are preferred. In the system disclosed in GB 2 271 637, microwave energy is directed into a cavity containing a coil resonator wound around a section of the pipe. The activity of the coil resonator is detected remotely by a probe. This system exploits the fact that oil, water and gas have very different permitivities. However, this system has been found to exhibit unacceptable levels of attenuation between the input and the output.
The invention provides apparatus for measuring the relative proportions of dissimilar fluids in a pipe, the apparatus comprising: a coil resonator, helically wound, in use, around the pipe; a variable frequency source of electromagnetic radiation, arranged to send electromagnetic radiation into the coil; an electromagnetic detector arranged to detect electromagnetic radiation emitted by the resonator, which radiation is indicative of the relative proportions of the fluids in the pipe; characterised in that one of the source and the detector is physically connected to an end portion of the resonator.
Preferably, both the source and the detector are physically connected to opposite end portions of the coil resonator. The provision of direct connection between the electromagnetic source and the coil, and/or the coil and the detector, results in a significantly reduced attenuation between input and output.
Consequently, an amplifier of lower gain can be employed at the output. Previously, high gain amplifiers needed to be used, which caused problems when the detected signal caused by a slight change in fluid proportions was so small as to be swamped by the noise inherent in the amplifier. The invention is particularly suitable for measuring the relative proportions of oil, gas and water in crude oil being extracted from a hydrocarbon well.
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:-
Figure 1 is a partly sectional side view of prior art apparatus for measuring the relative proportions of dissimilar fluids in a pipe;
Figure 2 schematically illustrates apparatus constructed according to the invention;
Figure 3 is a partly sectional side view of apparatus constructed according to the invention; and
Figure 4 is a schematic diagram of a measurement system including the apparatus of Figure 3.
Like reference numerals have been used for like parts throughout the specification.
Referring to the prior art apparatus of Figure 1, a helical coil resonator 1 is shown, which is an electric conductor shaped into a helix. A pipe 2, through which a portion of the fluid of interest is arranged to flow, passes through the coils of the resonator 1. The resonator 1 and pipe 2 are situated in a conductive metal cavity 3. Microwave energy is introduced into the cavity 3 by means of an input coaxial probe 4 and the resulting activity of the resonator 1 can be sensed using a remotely located output coaxial probe
5.
The resonant peak of the helical coil resonator 1 for a given input power varies, both in frequency and amplitude, in dependence on the material within the pipe 2. The resonant frequency is affected by the dielectric constant of the material within the pipe 2, while the amplitude of the resonant peak is affected by the absorption of energy by the material within the pipe. Thus, the region between the input 4 and output 5 acts as an attenuator, with the degree of attenuation varying in dependence on the relative proportions of the fluid flowing through the pipe 2. In practice, it has been found that the attenuation can be as high as 60-90dB. Consequently, a high gain amplifier is conventionally employed to amplify the signal from the output probe. However, when the change in relative proportions of the fluids is small and, therefore, the change in output signal is correspondingly small, this signal change can become lost in the noise inherent in such a high gain amplifier. Thus, the sensitivity of the device is low.
Apparatus constructed according to the invention is shown in Figure 2. This apparatus also comprises a coil resonator 1 helically wound around a section 2 of pipe. There is also a microwave energy source 6 and a microwave output detector 7, which includes an amplifier 13 and analysing circuitry. The output detector 7 processes signals corresponding to the activity of the resonator 1.
In accordance with the invention, at least one of the energy source 6 and output detector 7 are physically connected to the coil resonator itself. In the embodiment shown in Figure 2, both the energy source 6 and output detector 7 are connected to the coil resonator. The energy source 6 is connected to one end portion of the coil resonator 1 by means of a co-axial cable 8, via a first capacitor 9. The output detector 7 is connected to the other end portion of the resonator 1 by means of a co-axial cable 10, via a second capacitor 11. In this manner, the attenuation between the input and output is much reduced, typically by at least lOdB. As a consequence, the gain of the amplifier 13, which amplifies the output signal, can be reduced by a similar amount. Thus, the amplifier noise level is reduced, resulting in a much improved output signal-to-noise ratio. This enables much smaller changes of output signal to be measured and results in a device with sufficient dynamic range to allow the desired degree of accuracy of measurement of the fluid characteristics.
The capacitors 9, 11 are located close to opposite end portions of the coil resonator 1. A suitable value for the capacitors is in the range of six picofarads. The co-axial cables 8, 10 are screened in the region of the respective capacitors 9, 11. An electrically conductive insulated wire 12 extends between the ends of the cables 8, 10 and is joined to the respective screens. Thus, the apparatus shown in Figure 2 comprises a resonant circuit distinct from the prior art apparatus of Figure 1.
Referring now to Figure 3, the pipe 2 is arranged to carry a portion of the dissimilar fluids of interest. The pipe 2 is formed of plastics material, although any electrically insulating material could be used. A suitable plastics material for this application would be polyetheretherketone (PEEK) owing to its high resistance to corrosive substances and stability at high temperatures. The coil resonator 1 is arranged to be helically wound around a section 14 of the pipe and is co-axial with it.
The pipe section 14 may be machined with a helical groove having the same dimensions as the resonator 1, so that the resonator is located on the outer surface by the groove. A sleeve 15 is arranged to fit over the coil resonator 1. The internal diameter of the sleeve 15 is chosen so that there is a slight interference fit with the external diameter of the resonator 1, thereby ensuring that the resonator is kept in place. This is especially useful in circumstances where the pipe may be susceptible to vibrations.
The apparatus of Figure 3 is mounted within a larger fluid extraction pipe (not shown). Therefore, it is desirable to isolate the resonating circuit from the fluid surrounding the apparatus. Thus, the pipe section 14 incorporating the resonator is held within a metal tube 16. The metal tube 16 screens the apparatus within from external electromagnetic fields. The tube 16 also provides protection for the enclosed apparatus from mechanical damage or corrosion, such as might be encountered in a sub-sea hydrocarbon well. O- rings 17, 18 provide a seal between the ends of the metal tube 16 and the pipe 2.
The co-axial cables 8, 10 associated with the source of microwave radiation (not shown in this drawing) and the microwave output detector (also not shown in this drawing) are introduced into the metal tube 16 via an aperture 19 sealed by a cable gland 20. A channel in the outer surface of the sleeve 15 is arranged to accommodate the cables 8, 10 and the associated capacitors 9, 11. The insulated wire for connecting the screens of the cables 8, 10 is embedded in the sleeve 15 and is not shown in this drawing. The coaxial cable 8 is connected to a first end portion of the resonator 1 via a first opening in the sleeve 15; a second opening in the sleeve allows the cable 10 to be connected to the other end portion of the resonator 1.
The resonator 1 and capacitors 9, 11 are shown symbolically in Figure 4. The source 6 of microwave radiation and microwave detector 7 including amplifier 13 are also represented in this drawing. The source 6 of microwave radiation is an oscillator having an output variable across a range of frequencies. The microwave radiation is supplied directly to an end of the coil resonator 1 via the capacitor 9. A coupler 21 takes a portion of the input power to the resonator 1 and supplies it to the microwave detector 7 as a reference. The coil 'resonator 1 is connected, via capacitor 11, to the detector 7, which detects activity of the resonator. In operation in, for example a hydrocarbon well, a mixture of oil, water and gas flows through the pipe, including the section 14 having the coil resonator. A data analyser and controller, included in the circuitry comprising the microwave output detector 7, varies the frequency of the microwave source and plots, for example, the output voltages derived from the output signal of the coil resonator 1. The output detector 7 could alternatively plot the output current, or any other characteristic of the output signal of the coil resonator 1.
The output power of the helical coil resonator 1 is plotted against input frequency to produce the resonant peak for the resonator. A measurement of the attenuation of microwave energy provides an indication of the relative proportions of oil, water and gas in the fluid extraction pipe because those three fluids have very different permitivities. It has been found that the resonant frequency of a coil resonator is more sensitive to the properties of material in the vicinity of the coil itself than it is to the properties of material in the centre of the pipeline. This is because the strength of the electric fields generated by the coil are stronger proximate the coil. Therefore, an advantageous arrangement is that of a plurality of coil resonators, such as that illustrated in GB- 2271637. Each coil resonator has a larger circumference than the pipe. The coil resonators are arranged around the pipe so that the axis of each coil is offset from that of the pipe. The resonant peaks of the helical coil will be mainly influenced by the part of the fluid flow adjacent each coil and, since each coil is adjacent different part of the fluid flow, this will allow a map of the distribution of oil, water and gas within the pipe to be produced if required. The number of coils used is a trade-off between increasing accuracy and sensitivity of the system by increasing the number of coils used, and the increase in the cost and bulk the system due to the use of more coils.
The system as hereinbefore described will only provide information on the relative proportions of gas, oil and water in the pipe. In order to determine the absolute volumes of the three fluids passing through the pipe, additional apparatus to. determine the rate of flow of fluid within the pipe would be needed. Such apparatus is well known in itself and need not be described in detail here.
The microwave oscillator could be replaced by an r.f. oscillator. Helical coil resonators also work at r.f. frequencies (500MHz to 1GHz); the microwave frequency band is from 1 GHz to 20GHz.

Claims

1. Apparatus for measuring the relative proportions of dissimilar fluids in a pipe, the apparatus comprising: a coil resonator, helically wound, in use, around the pipe; a variable frequency source of electromagnetic radiation, ananged to send electromagnetic radiation into the coil; an electromagnetic detector arranged to detect electromagnetic radiation emitted by the resonator, which radiation is indicative of the relative proportions of the fluids in the pipe; characterised in that one of the source and the detector is physically connected to the resonator.
2. Apparatus as claimed in Claim 1, in which the physical connection is provided by means of a co-axial cable.
3. Apparatus as claimed in Claim 2, in which the end portion of the cable nearest the resonator is screened.
4. Apparatus as claimed in Claim 2 or 3, in which a capacitor is interposed between the co-axial cable and the resonator.
5. Apparatus for measuring the relative proportions of dissimilar fluids in a pipe, the apparatus comprising: a coil resonator, helically wound, in use, around the pipe; a variable frequency source of electromagnetic radiation, arranged to send electromagnetic radiation into the coil; an electromagnetic detector arranged to detect electromagnetic radiation emitted by the resonator, which radiation is indicative of the relative proportions of the fluids in the pipe; characterised in that the source is physically connected to an end portion of the resonator and the detector is physically connected to the other end portion of the resonator.
6. Apparatus as claimed in Claim 5, in which each physical connection is provided by means of a co-axial cable.
7. Apparatus as claimed in Claim 6, in which the end portions of the cables nearest the resonator are screened.
8. Apparatus as claimed in Claim 7, in which the screens of each cable are joined.
9. Apparatus as claimed in Claim 8, in which the screens are joined by means of an insulated, electrically conductive wire.
10. Apparatus as claimed in any one of Claims 6 to 9, in which capacitors are interposed between the ends of the respective cables and the resonator.
11. Apparatus as claimed in any preceding claim, further comprising a screen for the resonator.
12. Apparatus as claimed in claim 11, in which the screen comprises an electrically conductive tube.
13. Apparatus as claimed in claim 12, in which the end portions of the tube are sealed to the pipe.
14. Apparatus as claimed in any preceding claim, in which the detector includes an amplifier.
15. Apparatus as claimed in any preceding claim, in which the electromagnetic radiation is microwave radiation.
16. Apparatus as claimed in any preceding claim, in which the electromagnetic radiation is r.f. radiation.
\~~l° A pipe incorporating apparatus as claimed in any preceding claim.
I ^» A hydrocarbon well incorporating apparatus as claimed in any one of Claims 1 to IT-
1 ^. A method of measuring the relative proportions of dissimilar fluids in a pipe, comprising: sending electromagnetic radiation, by means of a variable frequency source of electromagnetic radiation into a coil resonator helically wound around the pipe; detecting electromagnetic radiation emitted by the resonator, by means of a detector, which radiation is indicative of the relative proportion of fluids in the pipe; wherein at least one of the source and the detector is physically connected to an end portion of the resonator.
PCT/GB2001/003700 2000-08-17 2001-08-16 Measuring relative proportions of dissimilar fluids in a pipe WO2002016931A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001278636A AU2001278636A1 (en) 2000-08-17 2001-08-16 Measuring relative proportions of dissimilar fluids in a pipe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0020167A GB2365978A (en) 2000-08-17 2000-08-17 Measuring relative proportions of dissimilar fluids in a pipe
GB0020167.3 2000-08-17

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WO2002016931A1 true WO2002016931A1 (en) 2002-02-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2062178A2 (en) * 2006-08-21 2009-05-27 Uri Rapoport A non-destructive on-line method for measuring predetermined physical, electrochemical, chemical or biological state transformation of a substance and a system thereof
GB2468754A (en) * 2009-03-20 2010-09-22 Taylor Hobson Ltd Determining phase fractions by flowing multiphase fluid through a resonant cavity in which certain resonance modes are suppressed or enhanced
US9588063B2 (en) 2014-06-02 2017-03-07 Senfit Oy Sensor, measuring device, and measuring method
WO2017137752A1 (en) * 2016-02-11 2017-08-17 M-Flow Technologies Limited Apparatus and method for measuring a composition of a fluid

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201218956D0 (en) 2012-10-22 2012-12-05 Flow Technologies Ltd M Fluid sensor
EP2952887B1 (en) * 2014-06-02 2019-01-30 Senfit Oy Sensor, measuring device, and measuring method for measuring the permittivity of a sample using a helix conductor
US10241059B2 (en) 2015-08-28 2019-03-26 Saudi Arabian Oil Company Water-cut sensor system
US10386312B2 (en) 2015-08-28 2019-08-20 Saudi Arabian Oil Company Systems and methods for determining water-cut of a fluid mixture
US9804105B2 (en) 2015-08-28 2017-10-31 Saudi Arabian Oil Company Systems and methods for determining water-cut of a fluid mixture
US11022597B2 (en) * 2018-05-21 2021-06-01 Saudi Arabian Oil Company Fluid sensing system using planar resonators
NO345738B1 (en) * 2019-03-29 2021-07-12 Wionetic AS Electromagnetic flowmeter and method for determining a property of a fluid composition carried in a fluid conduit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157496A2 (en) * 1984-03-28 1985-10-09 Northern Telecom Limited Monitoring of magnetically permeable particles in a carrier material
JPS6225248A (en) * 1985-07-26 1987-02-03 Kawarada Takashi Instrument for measuring mixing ratio of mixture of dielectric material to be measured
EP0499841A1 (en) * 1991-02-18 1992-08-26 Mitsubishi Denki Kabushiki Kaisha Dielectric constant detection apparatus for fuel
GB2260407A (en) * 1991-10-10 1993-04-14 Christopher Barnes Contactless measurement of physical parameters of samples
US5389883A (en) * 1992-10-15 1995-02-14 Gec-Marconi Limited Measurement of gas and water content in oil
US5543722A (en) * 1991-08-28 1996-08-06 Mitsubishi Denki Kabushiki Kaisha Channel forming fuel permittivity sensor with automatic temperature compensation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6353206B1 (en) * 1996-05-30 2002-03-05 Applied Materials, Inc. Plasma system with a balanced source

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157496A2 (en) * 1984-03-28 1985-10-09 Northern Telecom Limited Monitoring of magnetically permeable particles in a carrier material
JPS6225248A (en) * 1985-07-26 1987-02-03 Kawarada Takashi Instrument for measuring mixing ratio of mixture of dielectric material to be measured
EP0499841A1 (en) * 1991-02-18 1992-08-26 Mitsubishi Denki Kabushiki Kaisha Dielectric constant detection apparatus for fuel
US5543722A (en) * 1991-08-28 1996-08-06 Mitsubishi Denki Kabushiki Kaisha Channel forming fuel permittivity sensor with automatic temperature compensation
GB2260407A (en) * 1991-10-10 1993-04-14 Christopher Barnes Contactless measurement of physical parameters of samples
US5389883A (en) * 1992-10-15 1995-02-14 Gec-Marconi Limited Measurement of gas and water content in oil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 203 (P - 591) 2 July 1987 (1987-07-02) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2062178A2 (en) * 2006-08-21 2009-05-27 Uri Rapoport A non-destructive on-line method for measuring predetermined physical, electrochemical, chemical or biological state transformation of a substance and a system thereof
EP2062178A4 (en) * 2006-08-21 2015-01-07 Uri Rapoport A non-destructive on-line method for measuring predetermined physical, electrochemical, chemical or biological state transformation of a substance and a system thereof
GB2468754A (en) * 2009-03-20 2010-09-22 Taylor Hobson Ltd Determining phase fractions by flowing multiphase fluid through a resonant cavity in which certain resonance modes are suppressed or enhanced
GB2468754B (en) * 2009-03-20 2011-05-11 Taylor Hobson Ltd Method and apparatus for determining phase fractions of multiphase flows
US9146197B2 (en) 2009-03-20 2015-09-29 Taylor Hobson Limited Method and apparatus for determining phase fractions of multiphase flows
US9588063B2 (en) 2014-06-02 2017-03-07 Senfit Oy Sensor, measuring device, and measuring method
WO2017137752A1 (en) * 2016-02-11 2017-08-17 M-Flow Technologies Limited Apparatus and method for measuring a composition of a fluid
US10473595B2 (en) 2016-02-11 2019-11-12 M-Flow Technologies Ltd Apparatus and method for measuring a composition of a fluid

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