[go: up one dir, main page]

NO174643C - Apparatus and method for determining flow rate and gas / liquid ratio in multi-phase streams - Google Patents

Apparatus and method for determining flow rate and gas / liquid ratio in multi-phase streams

Info

Publication number
NO174643C
NO174643C NO920155A NO920155A NO174643C NO 174643 C NO174643 C NO 174643C NO 920155 A NO920155 A NO 920155A NO 920155 A NO920155 A NO 920155A NO 174643 C NO174643 C NO 174643C
Authority
NO
Norway
Prior art keywords
gas
flow rate
liquid ratio
determining flow
phase streams
Prior art date
Application number
NO920155A
Other languages
Norwegian (no)
Other versions
NO920155D0 (en
NO920155L (en
NO174643B (en
Inventor
Jon Steinar Gudmundsson
Original Assignee
Jon Steinar Gudmundsson
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 Jon Steinar Gudmundsson filed Critical Jon Steinar Gudmundsson
Priority to NO920155A priority Critical patent/NO174643C/en
Publication of NO920155D0 publication Critical patent/NO920155D0/en
Priority to PCT/NO1993/000001 priority patent/WO1993014382A1/en
Publication of NO920155L publication Critical patent/NO920155L/en
Publication of NO174643B publication Critical patent/NO174643B/en
Publication of NO174643C publication Critical patent/NO174643C/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/18Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66Measuring 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708Measuring the time taken to traverse a fixed distance
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708Measuring the time taken to traverse a fixed distance
    • G01F1/7082Measuring the time taken to traverse a fixed distance using acoustic detecting arrangements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/74Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02Analysing fluids
    • G01N29/024Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/24Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
    • G01P5/245Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/028Material parameters
    • G01N2291/02818Density, viscosity
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/028Material parameters
    • G01N2291/02836Flow rate, liquid level
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/028Material parameters
    • G01N2291/02872Pressure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Measuring Volume Flow (AREA)
NO920155A 1992-01-13 1992-01-13 Apparatus and method for determining flow rate and gas / liquid ratio in multi-phase streams NO174643C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO920155A NO174643C (en) 1992-01-13 1992-01-13 Apparatus and method for determining flow rate and gas / liquid ratio in multi-phase streams
PCT/NO1993/000001 WO1993014382A1 (en) 1992-01-13 1993-01-05 Device and method for measuring multi phase flow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO920155A NO174643C (en) 1992-01-13 1992-01-13 Apparatus and method for determining flow rate and gas / liquid ratio in multi-phase streams

Publications (4)

Publication Number Publication Date
NO920155D0 NO920155D0 (en) 1992-01-13
NO920155L NO920155L (en) 1993-07-14
NO174643B NO174643B (en) 1994-02-28
NO174643C true NO174643C (en) 1994-06-08

Family

ID=19894774

Family Applications (1)

Application Number Title Priority Date Filing Date
NO920155A NO174643C (en) 1992-01-13 1992-01-13 Apparatus and method for determining flow rate and gas / liquid ratio in multi-phase streams

Country Status (2)

Country Link
NO (1) NO174643C (en)
WO (1) WO1993014382A1 (en)

Families Citing this family (91)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717573B1 (en) * 1994-03-15 1996-06-07 Total Sa Method and device for measuring and controlling the flow of a multiphase fluid in a transport pipe.
FR2721398B1 (en) * 1994-06-21 1996-08-23 Inst Francais Du Petrole Method and device for monitoring, by periodic excitation, a flow of particles in a conduit.
US5600073A (en) * 1994-11-02 1997-02-04 Foster-Miller, Inc. Method and system for analyzing a two phase flow
NO300437B1 (en) * 1994-11-09 1997-05-26 Jon Steinar Gudmundsson Method for determining flow rate in a fluid stream, in particular a two-phase stream
US6386018B1 (en) 1996-03-11 2002-05-14 Daniel Industries, Inc. Ultrasonic 2-phase flow apparatus and stratified level detector
US6209388B1 (en) 1996-03-11 2001-04-03 Daniel Industries, Inc. Ultrasonic 2-phase flow apparatus and method
US6151958A (en) * 1996-03-11 2000-11-28 Daniel Industries, Inc. Ultrasonic fraction and flow rate apparatus and method
DE19722274A1 (en) * 1997-05-28 1998-12-03 Degussa Method for measuring density and mass flow
RU2250438C9 (en) 1998-06-26 2005-08-27 Сидрэ Копэрейшн Method and device for measuring parameters of fluids in pipes
US6354147B1 (en) 1998-06-26 2002-03-12 Cidra Corporation Fluid parameter measurement in pipes using acoustic pressures
FR2781565B1 (en) * 1998-07-24 2000-08-25 Inst Francais Du Petrole METHOD AND DEVICE FOR MEASURING THE FLOW SPEED OF A FLUID VEIN
US6463813B1 (en) 1999-06-25 2002-10-15 Weatherford/Lamb, Inc. Displacement based pressure sensor measuring unsteady pressure in a pipe
US6691584B2 (en) 1999-07-02 2004-02-17 Weatherford/Lamb, Inc. Flow rate measurement using unsteady pressures
US6536291B1 (en) 1999-07-02 2003-03-25 Weatherford/Lamb, Inc. Optical flow rate measurement using unsteady pressures
US6601458B1 (en) 2000-03-07 2003-08-05 Weatherford/Lamb, Inc. Distributed sound speed measurements for multiphase flow measurement
US6813962B2 (en) 2000-03-07 2004-11-09 Weatherford/Lamb, Inc. Distributed sound speed measurements for multiphase flow measurement
US6550345B1 (en) 2000-09-11 2003-04-22 Daniel Industries, Inc. Technique for measurement of gas and liquid flow velocities, and liquid holdup in a pipe with stratified flow
SE0003348D0 (en) * 2000-09-18 2000-09-18 Flaekt Ab Apparatus and method for measuring the flow in a fluid
RU2263210C2 (en) * 2000-09-22 2005-10-27 Йон Стейнар Гудмундссон Method for pressure profile determination in well bore, discharge lines and in pipelines and determination method implementation (variants)
MXPA03002523A (en) * 2000-09-22 2004-09-10 Jon Steinar Gudmundsson Method for determining pressure profiles in wellbores, flowlines and pipelines, and use of such method.
US6782150B2 (en) 2000-11-29 2004-08-24 Weatherford/Lamb, Inc. Apparatus for sensing fluid in a pipe
DE10062875B4 (en) * 2000-12-16 2007-02-08 Hydrometer Gmbh Flowmeter
GB0110732D0 (en) * 2001-05-02 2001-06-27 Psl Technology Ltd Apparatus and method
US7059172B2 (en) 2001-11-07 2006-06-13 Weatherford/Lamb, Inc. Phase flow measurement in pipes using a density meter
US6698297B2 (en) 2002-06-28 2004-03-02 Weatherford/Lamb, Inc. Venturi augmented flow meter
US6971259B2 (en) 2001-11-07 2005-12-06 Weatherford/Lamb, Inc. Fluid density measurement in pipes using acoustic pressures
US7328624B2 (en) 2002-01-23 2008-02-12 Cidra Corporation Probe for measuring parameters of a flowing fluid and/or multiphase mixture
US7275421B2 (en) 2002-01-23 2007-10-02 Cidra Corporation Apparatus and method for measuring parameters of a mixture having solid particles suspended in a fluid flowing in a pipe
US7032432B2 (en) 2002-01-23 2006-04-25 Cidra Corporation Apparatus and method for measuring parameters of a mixture having liquid droplets suspended in a vapor flowing in a pipe
US7359803B2 (en) 2002-01-23 2008-04-15 Cidra Corporation Apparatus and method for measuring parameters of a mixture having solid particles suspended in a fluid flowing in a pipe
CA2474071C (en) * 2002-01-23 2012-09-18 Cidra Corporation Apparatus and method for measuring parameters of a mixture having solid particles suspended in a fluid flowing in a pipe
CN1656360A (en) * 2002-04-10 2005-08-17 塞德拉公司 Probes for measuring parameters of flowing fluids and/or multiphase mixtures
WO2004044531A2 (en) * 2002-11-12 2004-05-27 Cidra Corporation An apparatus having an array of clamp on piezoelectric film sensors for measuring parameters of a process flow within a pipe
US7165464B2 (en) 2002-11-15 2007-01-23 Cidra Corporation Apparatus and method for providing a flow measurement compensated for entrained gas
WO2004048906A2 (en) * 2002-11-22 2004-06-10 Cidra Corporation Method for calibrating a flow meter having an array of sensors
US7096719B2 (en) 2003-01-13 2006-08-29 Cidra Corporation Apparatus for measuring parameters of a flowing multiphase mixture
WO2004063675A2 (en) 2003-01-13 2004-07-29 Cidra Corporation Apparatus and method using an array of ultrasonic sensors for determining the velocity of a fluid within a pipe
US7343818B2 (en) 2003-01-21 2008-03-18 Cidra Corporation Apparatus and method of measuring gas volume fraction of a fluid flowing within a pipe
US7058549B2 (en) 2003-01-21 2006-06-06 C1Dra Corporation Apparatus and method for measuring unsteady pressures within a large diameter pipe
US7086278B2 (en) 2003-01-21 2006-08-08 Cidra Corporation Measurement of entrained and dissolved gases in process flow lines
CA2516255C (en) 2003-01-21 2013-10-01 Cidra Corporation An apparatus and method of measuring gas volume fraction of a fluid flowing within a pipe
US20060048583A1 (en) 2004-08-16 2006-03-09 Gysling Daniel L Total gas meter using speed of sound and velocity measurements
EP1599705B1 (en) 2003-03-04 2019-01-02 CiDra Corporation An apparatus having a multi-band sensor assembly for measuring a parameter of a fluid flow flowing within a pipe
US6986276B2 (en) 2003-03-07 2006-01-17 Weatherford/Lamb, Inc. Deployable mandrel for downhole measurements
US6837098B2 (en) 2003-03-19 2005-01-04 Weatherford/Lamb, Inc. Sand monitoring within wells using acoustic arrays
EP1631797A2 (en) 2003-06-05 2006-03-08 CiDra Corporation Apparatus for measuring velocity and flow rate of a fluid having a non-negligible axial mach number using an array of sensors
US7121152B2 (en) 2003-06-06 2006-10-17 Cidra Corporation Portable flow measurement apparatus having an array of sensors
WO2005003695A1 (en) 2003-06-24 2005-01-13 Cidra Corporation Characterizing unsteady pressures in pipes using optical measurement devices
WO2005003693A2 (en) 2003-06-24 2005-01-13 Cidra Corporation System of distributed configurable flowmeters
US7197938B2 (en) 2003-06-24 2007-04-03 Cidra Corporation Contact-based transducers for characterizing unsteady pressures in pipes
US7150202B2 (en) 2003-07-08 2006-12-19 Cidra Corporation Method and apparatus for measuring characteristics of core-annular flow
CA2532468C (en) 2003-07-15 2013-04-23 Cidra Corporation A dual function flow measurement apparatus having an array of sensors
US7134320B2 (en) 2003-07-15 2006-11-14 Cidra Corporation Apparatus and method for providing a density measurement augmented for entrained gas
US7253742B2 (en) 2003-08-01 2007-08-07 Cidra Corporation Method and apparatus for measuring parameters of a fluid flowing within a pipe using a configurable array of sensors
US7882750B2 (en) 2003-08-01 2011-02-08 Cidra Corporate Services, Inc. Method and apparatus for measuring parameters of a fluid flowing within a pipe using a configurable array of sensors
US7322251B2 (en) 2003-08-01 2008-01-29 Cidra Corporation Method and apparatus for measuring a parameter of a high temperature fluid flowing within a pipe using an array of piezoelectric based flow sensors
WO2005015135A2 (en) 2003-08-08 2005-02-17 Cidra Corporation Piezocable based sensor for measuring unsteady pressures inside a pipe
US6910388B2 (en) 2003-08-22 2005-06-28 Weatherford/Lamb, Inc. Flow meter using an expanded tube section and sensitive differential pressure measurement
US7110893B2 (en) 2003-10-09 2006-09-19 Cidra Corporation Method and apparatus for measuring a parameter of a fluid flowing within a pipe using an array of sensors
US7237440B2 (en) 2003-10-10 2007-07-03 Cidra Corporation Flow measurement apparatus having strain-based sensors and ultrasonic sensors
US7171315B2 (en) 2003-11-25 2007-01-30 Cidra Corporation Method and apparatus for measuring a parameter of a fluid flowing within a pipe using sub-array processing
US7152003B2 (en) 2003-12-11 2006-12-19 Cidra Corporation Method and apparatus for determining a quality metric of a measurement of a fluid parameter
US7330797B2 (en) 2004-03-10 2008-02-12 Cidra Corporation Apparatus and method for measuring settlement of solids in a multiphase flow
BRPI0508637B1 (en) 2004-03-10 2017-10-10 Cidra Corporation METHOD AND APPARATUS FOR MEASURING PARAMETERS OF A STRATIFIED FLOW
US7367239B2 (en) 2004-03-23 2008-05-06 Cidra Corporation Piezocable based sensor for measuring unsteady pressures inside a pipe
GB0407982D0 (en) * 2004-04-08 2004-05-12 Wood Group Logging Services In "Methods of monitoring downhole conditions"
US7426852B1 (en) 2004-04-26 2008-09-23 Expro Meters, Inc. Submersible meter for measuring a parameter of gas hold-up of a fluid
CA2568349C (en) 2004-05-17 2013-07-16 Cidra Corporation Apparatus and method for measuring compositional parameters of a mixture
US7380438B2 (en) 2004-09-16 2008-06-03 Cidra Corporation Apparatus and method for providing a fluid cut measurement of a multi-liquid mixture compensated for entrained gas
US7962293B2 (en) 2005-03-10 2011-06-14 Expro Meters, Inc. Apparatus and method for providing a stratification metric of a multiphase fluid flowing within a pipe
US7440873B2 (en) 2005-03-17 2008-10-21 Expro Meters, Inc. Apparatus and method of processing data to improve the performance of a flow monitoring system
CA2912218C (en) 2005-05-16 2018-02-27 Expro Meters, Inc. Method and apparatus for detecting and characterizing particles in a multiphase fluid
MX2007014705A (en) 2005-05-27 2008-02-15 Cidra Corp An apparatus and method for measuring a parameter of a multiphase flow.
US7526966B2 (en) 2005-05-27 2009-05-05 Expro Meters, Inc. Apparatus and method for measuring a parameter of a multiphase flow
WO2006134199A1 (en) * 2005-06-16 2006-12-21 Justiflow Oy Ultrasound flowmeter arrangement for determining speed of sound
US7418877B2 (en) 2005-07-07 2008-09-02 Expro Meters, Inc. Wet gas metering using a differential pressure based flow meter with a sonar based flow meter
US7603916B2 (en) 2005-07-07 2009-10-20 Expro Meters, Inc. Wet gas metering using a differential pressure and a sonar based flow meter
US7503217B2 (en) 2006-01-27 2009-03-17 Weatherford/Lamb, Inc. Sonar sand detection
US7454981B2 (en) 2006-05-16 2008-11-25 Expro Meters. Inc. Apparatus and method for determining a parameter in a wet gas flow
US7624650B2 (en) 2006-07-27 2009-12-01 Expro Meters, Inc. Apparatus and method for attenuating acoustic waves propagating within a pipe wall
US7624651B2 (en) 2006-10-30 2009-12-01 Expro Meters, Inc. Apparatus and method for attenuating acoustic waves in pipe walls for clamp-on ultrasonic flow meter
US8346491B2 (en) 2007-02-23 2013-01-01 Expro Meters, Inc. Sonar-based flow meter operable to provide product identification
US8229686B2 (en) 2007-06-28 2012-07-24 Expro Meters, Inc. Apparatus and method for measuring liquid and gas flow rates in a stratified multi-phase flow
US8862411B2 (en) 2007-08-24 2014-10-14 Expro Meters, Inc. Velocity and impingement method for determining parameters of a particle/fluid flow
HUP0700785A2 (en) * 2007-12-05 2009-06-29 Thormed Kft Method and apparatus for determining the flow parameters of a streaming medium
US7831398B2 (en) 2007-12-20 2010-11-09 Expro Meters, Inc. Method for quantifying varying propagation characteristics of normal incident ultrasonic signals as used in correlation based flow measurement
US7963177B2 (en) 2008-04-10 2011-06-21 Expro Meters, Inc. Apparatus for attenuating ultrasonic waves propagating within a pipe wall
AU2009256063B2 (en) 2008-06-05 2015-01-29 Expro Meters, Inc. Method and apparatus for making a water cut determination using a sequestered liquid-continuous stream
US7975559B2 (en) 2008-07-03 2011-07-12 Expro Meters, Inc. Apparatus for attenuating ultrasonic waves propagating within a pipe wall
GB2472081B (en) 2009-07-24 2014-03-05 Bios Developments Ltd A method for determining speed of a signal species in a medium and associated apparatus
CN105891538B (en) * 2016-04-05 2020-04-17 Oppo广东移动通信有限公司 Mobile terminal capable of testing water flow speed and using method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151203A (en) * 1935-12-23 1939-03-21 Hugh B Wilcox Fluid meter and method of measuring the rate of flow of fluids
US3514071A (en) * 1967-04-14 1970-05-26 United Aircraft Corp Shock pulse generator
US3469445A (en) * 1967-07-20 1969-09-30 United Aircraft Corp Gas flow measuring system
US3496771A (en) * 1968-03-04 1970-02-24 United Aircraft Corp Mass flow measuring device for a gaseous medium
CH669463A5 (en) * 1985-03-21 1989-03-15 Walter Guggenbuehl Prof Dr Gas flow and temp. measuring device - uses ultrasonic pulses transmitted simultaneously in opposite directions at angle to gas flow
FI76885C (en) * 1987-01-16 1988-12-12 Valtion Teknillinen Acoustic flow measurement method and device for application thereof.

Also Published As

Publication number Publication date
NO920155D0 (en) 1992-01-13
WO1993014382A1 (en) 1993-07-22
NO920155L (en) 1993-07-14
NO174643B (en) 1994-02-28

Similar Documents

Publication Publication Date Title
NO174643C (en) Apparatus and method for determining flow rate and gas / liquid ratio in multi-phase streams
NO944447D0 (en) Method and apparatus for measuring the mass flow rate of fluid components in a multiphase plug stream
NO174119C (en) Method and apparatus for continuously measuring fluid flow rate
NO954512D0 (en) Apparatus and method for gas / liquid separation
NO943842D0 (en) Method and apparatus for measuring particle velocity in fluid
NO961191D0 (en) Method and apparatus for local measurement of flow parameters for a multiphase fluid
EP0454166A3 (en) Traffic flow measuring method and apparatus
NO173469C (en) Method and apparatus for measuring the proportions of different components of a tube mix flowing in a pipeline
DK0562260T3 (en) Apparatus and method of reversible flow for analysis of liquid samples
DK0561458T3 (en) Method and apparatus for purifying water
DK0713080T3 (en) Method and apparatus for measuring with "sing-around" technique
NO952540D0 (en) Method and apparatus for measuring flow rates using tracer techniques
DK510184A (en) METHOD AND APPARATUS FOR FLUID FLOW MEASUREMENT
NO833983L (en) APPARATUS FOR MEASURING GAS FRACTION IN A TWO COMPONENT FLOW CONSISTING OF LIQUID AND GAS IN MIXTURE
NO934526L (en) Procedure and apparatus for determining total flow rate in a ventilation system
DK0687197T3 (en) Apparatus for introducing and spreading air or other gas in a liquid
ITMI941889A0 (en) METHOD AND DEVICE FOR CONTROLLING THE FLOW RATE OF CARRIER GAS IN GAS CHROMATOGRAPHIC APPARATUS
DK529784A (en) METHOD AND APPARATUS FOR MEASURING A FLUID FLOW
DK0383585T3 (en) Method and apparatus for determining fluid flow volume
NO960007D0 (en) Apparatus and method for measuring flow rate
NO170175C (en) METHOD AND APPARATUS FOR MEASURING FLUID FLOW
NO960832L (en) Method and apparatus for determining the concentration of a component in disposition in a fluid stream
NO932021D0 (en) PROCEDURE AND APPARATUS FOR SEPARATING FLUID SUBSTANCES IN FLOWING FLUIDS
GB2109548B (en) Methods of and apparatus for measuring flow vectors in streams of gas
GB9314592D0 (en) Method and apparatus for improving liquid flow

Legal Events

Date Code Title Description
MK1K Patent expired