WO1988002855A1 - Particle analysis apparatus - Google Patents

Particle analysis apparatus Download PDF

Info

Publication number
WO1988002855A1
WO1988002855A1 PCT/GB1987/000721 GB8700721W WO8802855A1 WO 1988002855 A1 WO1988002855 A1 WO 1988002855A1 GB 8700721 W GB8700721 W GB 8700721W WO 8802855 A1 WO8802855 A1 WO 8802855A1
Authority
WO
WIPO (PCT)
Prior art keywords
sample
cell
analyser
conduit
probe
Prior art date
Application number
PCT/GB1987/000721
Other languages
French (fr)
Inventor
Michael John Bennett
Original Assignee
North Sea Instruments 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 North Sea Instruments Limited filed Critical North Sea Instruments Limited
Publication of WO1988002855A1 publication Critical patent/WO1988002855A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
    • G01N15/0227—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging using imaging, e.g. a projected image of suspension; using holography
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/38—Diluting, dispersing or mixing samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
    • G01N15/0211—Investigating a scatter or diffraction pattern
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N2015/0042—Investigating dispersion of solids
    • G01N2015/0053—Investigating dispersion of solids in liquids, e.g. trouble
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N2015/0662—Comparing before/after passage through filter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/05—Flow-through cuvettes
    • G01N2021/054—Bubble trap; Debubbling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N2021/4704—Angular selective
    • G01N2021/4711—Multiangle measurement
    • G01N2021/4716—Using a ring of sensors, or a combination of diaphragm and sensors; Annular sensor

Definitions

  • This invention relates to apparatus for analysing suspended particles in fluids particularly, but not exclusively, liquids returned from wellbores in oil drilling.
  • One particularly preferred application is in monitoring brine return during well completion by gravel packing.
  • Such analysis has in the past been made by removing discrete samples from the fluid return for analysis using various techniques.
  • One is the Coulter counter, which is slow and not suitable for a wide range of particle sizes.
  • Another is filtration of a known volume followed by drying and weighing; this may incur a time lapse of up to one hour.
  • Another is the use of an optical turbidity meter, which is relatively quick and convenient to use, but is inaccurate since turbidity is not in fact a function of solids loading.
  • An object of the present invention is to provide improved accuracy of analysis and to make possible continuous monitoring, rather than discrete sampling, of the returned fluid.
  • the invention in its preferred form makes use of laser diffraction techniques. Such techniques are known in the analysis of air-borne particles sprayed from aerosol containers and fuel injectors but have not hitherto been applied to solid particle suspensions in wellbore fluids.
  • the invention provides apparatus for the analysis of suspended solids in a liquid flowing in a conduit comprising a probe adapted for insertion in the conduit to continuously remove a fluid sample, degassing means for removing entrapped gases from the liquid, and an analyser through which the degassed liquid is flowed; the analyser comprising a sample cell, means for producing a collimated light beam incident on the cell to be diffracted by suspended particles with the cell, and a detector arranged to measure the intensity of light diffracted by varying degrees.
  • Fig 1 is a schematic view of the apparatus
  • Fig 2 is a cross-sectional side view of a sampling probe used in the apparatus
  • Figs 3a and 3b are respectively side and plan views of a degasser for use in the apparatus;
  • Fig 4 shows an optional settling tank arrangement
  • Fig 4a illustrates the sequence of operations in the arrangeme of Fig 4;
  • Fig 5 is a schematic of the analyser used in the apparatus Referring to Fig 1, the apparatus is for analysing particles iQ suspended in a fluid flowing from an input line 10 through a filter bank 12 and on via an output line 14.
  • Sampling probes 16a, 16b are positioined in lines 10, 14 respectively, each probe communicating with a degassing vessel 18a, 18b via a 90 u filter 20a, 20b and a solenoid valve 22a, 22b.
  • the degassing vessels are positioined in lines 10, 14 respectively, each probe communicating with a degassing vessel 18a, 18b via a 90 u filter 20a, 20b and a solenoid valve 22a, 22b.
  • ] _5 18 are subject to vacuum established by vacuum pump 24 and vacuum control valve 26 via vacuum line 28.
  • Each degassing vessel can be discharged by a peristaltic pump 30a, 30b into line 32a, 32b from which flow can be diverted by 3-port solenoid valve 34a, 34b to waste tank 36 or junction 38, selectively.
  • Junction 38
  • waste tank 36 is also connected to a reservoir 40 for a flushing fluid via solenoid valve 42. Fluids fed to junction 38 pass through an analyser 44 (described in detail below) and thence to waste tank 36. The contents of waste tank 36 are recycled to input line 10 by waste pump 46 and line 48.
  • valves 22 are operated such that one degassing vessel 18 is filled with sample and the sample allowed to degas and settle while the contents of the other are being analysed.
  • the appropriate peristaltic pump 30 is actuated in conjunction with valve 34 to pass a predeter-
  • valve 34 is operated appropriately to flush the analyser between samples.
  • the analyser receives samples alternately from upstream and downstream of the filter bank 12.
  • a probe body 50 is screw-threadedly engaged in the tube wall 52, which is reinforced by plate 54.
  • the body 50 mounts a probe comprising a stainless steel tube 56 having its end bent to form an orifice 58 facing directly upstream.
  • the tube 56 extends beyond the body 50 for connection with a flexible nylon tube extending to the filter 20.
  • An annulus 60 is defined between the tube 56 and the body 50, for communicating line pressure to a pressure sensor 62, which is connected to instrumentation not directly relevant to the present invention.
  • each degassing vessel 18 suitably comprises a cylindrical body portion with a conical bottom and domed top. This may suitably be fabricated from "Pyrex" type glass.
  • the sample inlet to the vessel may be a glass tube 18c.
  • the vessel 18 may be formed with an integral tangential inlet 18d.
  • junction 38 and valves 34 may be replaced by the settling tank arrangement shown in Fig 4.
  • This comprises a pair of tanks generally designated 64, each having an outer body 66 and central upstanding tube 68, defining between them an annular volume 69.
  • the tanks 64 are supplied from constant rate pumps via pivoted tubes 70 swingable by solenoids 72.
  • the tubes 70 are moved as indicated in Fig 4a so that in one tank the annular volume 69 is filled and allowed to settle, while in the same time period the tube 70 of the other tank discharges to waste while the contents of its annular volume are being passed to the analyser via solenoid valve 74.
  • the top of the tube 68 is positioned within body 66 to define the volume 69 precisely, any excess fluid overflowing to waste.
  • the sample enter a tank 80 in which it is stirred or, preferably, agitated by known ultrasonic means (not shown).
  • Sample fluid is passed by pump 82 from the tank 80 through a transparent-walled sample cell 84 for analysis by - 4 -
  • a laser 86 illuminates the sample cell 84, via optical system 88, which expands and collimates the laser light. Particles in the sample fluid produce diffraction of the incident beam. The diffracted light is focused by a convergen optical system 90 onto a detector assembly 92 which comprises a solid-state device with concentric rings of detecting elements 94.
  • the presence of particles within a light beam causes light diffraction.
  • the result of this is a set of light rings at various radii to the incident beam (diffraction rings) which are outside the geometrical limits of the original beam.
  • Each set of diffraction rings is spaced radially at a distance that is fundamentally related to a specific particle diameter.
  • each ring of elements 94 is optimised for a particular particle size.
  • Suitable electronics indicated at 96 continuously scan the detector whose output is then amplified, digitized and relayed ⁇ Q a suitably programmed computer 98. Tabulated results ot particle size distribution, concentration and live histogram displays are displayed on the video display unit, and hard copies can be produced by an on line printer.
  • the computer 98 suitably also handles other data relating to the fluid flow, such as flow rates and pressures.
  • the invention thus enables continuous, virtually real-time monitoring, and overcomes problems of accuracy inherent in any method based on random samples.
  • the invention may be effected with a single probe and degasser, and other forms of detector may be used in the analyser.
  • a simpler detector could be used to monitor solids concentration in parts per million, without establishing a particle size distribution.

Abstract

A fluid sample containing suspended solids is removed from a conduit by a probe (Fig. 2) and passes via a stirring chamber (80) to a transparent cell (84). The cell is illuminated by laser (86) via expansion and collimation optics (88). Light diffracted by solid particles is focused by optical system (90) onto a detector assembly (92).

Description

Particle analysis apparatus
This invention relates to apparatus for analysing suspended particles in fluids particularly, but not exclusively, liquids returned from wellbores in oil drilling. One particularly preferred application is in monitoring brine return during well completion by gravel packing.
Such analysis has in the past been made by removing discrete samples from the fluid return for analysis using various techniques. One is the Coulter counter, which is slow and not suitable for a wide range of particle sizes. Another is filtration of a known volume followed by drying and weighing; this may incur a time lapse of up to one hour. Another is the use of an optical turbidity meter, which is relatively quick and convenient to use, but is inaccurate since turbidity is not in fact a function of solids loading.
An object of the present invention is to provide improved accuracy of analysis and to make possible continuous monitoring, rather than discrete sampling, of the returned fluid.
The invention in its preferred form makes use of laser diffraction techniques. Such techniques are known in the analysis of air-borne particles sprayed from aerosol containers and fuel injectors but have not hitherto been applied to solid particle suspensions in wellbore fluids.
The invention provides apparatus for the analysis of suspended solids in a liquid flowing in a conduit comprising a probe adapted for insertion in the conduit to continuously remove a fluid sample, degassing means for removing entrapped gases from the liquid, and an analyser through which the degassed liquid is flowed; the analyser comprising a sample cell, means for producing a collimated light beam incident on the cell to be diffracted by suspended particles with the cell, and a detector arranged to measure the intensity of light diffracted by varying degrees. way of example, with reference to the accompanying drawings in which:-
Fig 1 is a schematic view of the apparatus;
- 2 -
Fig 2 is a cross-sectional side view of a sampling probe used in the apparatus;
Figs 3a and 3b are respectively side and plan views of a degasser for use in the apparatus;
5 Fig 4 shows an optional settling tank arrangement;
Fig 4a illustrates the sequence of operations in the arrangeme of Fig 4;
Fig 5 is a schematic of the analyser used in the apparatus Referring to Fig 1, the apparatus is for analysing particles iQ suspended in a fluid flowing from an input line 10 through a filter bank 12 and on via an output line 14. Sampling probes 16a, 16b are positioined in lines 10, 14 respectively, each probe communicating with a degassing vessel 18a, 18b via a 90 u filter 20a, 20b and a solenoid valve 22a, 22b. The degassing vessels
]_5 18 are subject to vacuum established by vacuum pump 24 and vacuum control valve 26 via vacuum line 28. Each degassing vessel can be discharged by a peristaltic pump 30a, 30b into line 32a, 32b from which flow can be diverted by 3-port solenoid valve 34a, 34b to waste tank 36 or junction 38, selectively. Junction 38
20 is also connected to a reservoir 40 for a flushing fluid via solenoid valve 42. Fluids fed to junction 38 pass through an analyser 44 (described in detail below) and thence to waste tank 36. The contents of waste tank 36 are recycled to input line 10 by waste pump 46 and line 48.
25 In operation, the valves 22 are operated such that one degassing vessel 18 is filled with sample and the sample allowed to degas and settle while the contents of the other are being analysed. For the latter operation, the appropriate peristaltic pump 30 is actuated in conjunction with valve 34 to pass a predeter-
30 rained sample volume through the analyser 44, excess sample volume being diverted by valve 34 direct to waste tank 36. Valve 42 is operated appropriately to flush the analyser between samples.
Thus, the analyser receives samples alternately from upstream and downstream of the filter bank 12.
35 The samples are extracted from lines 12, 14 by means of - -
a probe as seen in Fig 2. A probe body 50 is screw-threadedly engaged in the tube wall 52, which is reinforced by plate 54. The body 50 mounts a probe comprising a stainless steel tube 56 having its end bent to form an orifice 58 facing directly upstream.
The tube 56 extends beyond the body 50 for connection with a flexible nylon tube extending to the filter 20.
An annulus 60 is defined between the tube 56 and the body 50, for communicating line pressure to a pressure sensor 62, which is connected to instrumentation not directly relevant to the present invention.
As shown in Fig 1, each degassing vessel 18 suitably comprises a cylindrical body portion with a conical bottom and domed top. This may suitably be fabricated from "Pyrex" type glass. The sample inlet to the vessel may be a glass tube 18c. Alternatively, as seen in Fig 3, the vessel 18 may be formed with an integral tangential inlet 18d.
In a modification, the junction 38 and valves 34 may be replaced by the settling tank arrangement shown in Fig 4. This comprises a pair of tanks generally designated 64, each having an outer body 66 and central upstanding tube 68, defining between them an annular volume 69. The tanks 64 are supplied from constant rate pumps via pivoted tubes 70 swingable by solenoids 72.
It will be appreciated that the tubes 70 are moved as indicated in Fig 4a so that in one tank the annular volume 69 is filled and allowed to settle, while in the same time period the tube 70 of the other tank discharges to waste while the contents of its annular volume are being passed to the analyser via solenoid valve 74. The top of the tube 68 is positioned within body 66 to define the volume 69 precisely, any excess fluid overflowing to waste.
Turning to Fig 5, the preferred form of the analyser 44 will now be described. The sample enter a tank 80 in which it is stirred or, preferably, agitated by known ultrasonic means (not shown). Sample fluid is passed by pump 82 from the tank 80 through a transparent-walled sample cell 84 for analysis by - 4 -
laser diffraction techniques. A laser 86 illuminates the sample cell 84, via optical system 88, which expands and collimates the laser light. Particles in the sample fluid produce diffraction of the incident beam. The diffracted light is focused by a convergen optical system 90 onto a detector assembly 92 which comprises a solid-state device with concentric rings of detecting elements 94.
The presence of particles within a light beam causes light diffraction. The result of this is a set of light rings at various radii to the incident beam (diffraction rings) which are outside the geometrical limits of the original beam. Each set of diffraction rings is spaced radially at a distance that is fundamentally related to a specific particle diameter.
In the detector 92, the position of each ring of elements 94 is optimised for a particular particle size. Suitable electronics indicated at 96 continuously scan the detector whose output is then amplified, digitized and relayed ^Q a suitably programmed computer 98. Tabulated results ot particle size distribution, concentration and live histogram displays are displayed on the video display unit, and hard copies can be produced by an on line printer. The computer 98 suitably also handles other data relating to the fluid flow, such as flow rates and pressures.
The invention thus enables continuous, virtually real-time monitoring, and overcomes problems of accuracy inherent in any method based on random samples.
Modifications of the above embodiment are of course possible within the scope of the invention. For example, the invention may be effected with a single probe and degasser, and other forms of detector may be used in the analyser. A simpler detector could be used to monitor solids concentration in parts per million, without establishing a particle size distribution.

Claims

1. Apparatus for the analysis of suspended solids in a liquid flowing in a conduit comprising a probe adapted for insertion in the conduit to continuously remove a fluid sample, degassing means for removing entrapped gases from the liquid, and an analyser through which the degassed liquid is flowed; the analyser comprising a sample cell, means for producing a collimated light beam incident on the cell to be diffracted by suspended particles within the cell, and a detector arranged to measure the intensity of light diffracted by varying degrees.
2. The apparatus of claim 1, in which the probe comprises a tube having an open end positioned to form an orifice facing directly into the fluid flow in the central area of the conduit.
3. The apparatus of claim 1, in which the degassing means comprises a vessel having a cylindrical body and a generally conical lower portion, a sample inlet in said cylindrical body, a sample outlet at the bottom of the lower portion, and a vacuum source connected to a point above said sample inlet.
4. The apparatus of claim 1, in which the analyser includes ultrasonic means for agitating incoming sample.
5. The apparatus of claim 1 or claim 4, in which said light beam producing means comprises a laser.
6. The apparatus of claim 5, in which said detector comprises concentric rings of light-sensitive detecting elements, and a convergent optical system is interposed between the sample cell and the detector.
7. Apparatus for measuring suspended solids in a liquid flow, comprising a liquid flow path having an inlet conduit, filter means, and an outlet conduit; a first sample probe in said inlet conduit; a second sample probe in said outlet conduit; first and second degassing means connected respectively to said first and second sample probes; an analyser; and means for passing degassed sample from said first and second degassing means alternately through the analyser; the analyser comprising a sample cell, means for producing a collimated light beam incident on the cell to be diffracted by suspended particles within the cell, and
- -
a detector arranged to measure the intensity of light diffracted by varying degrees.
PCT/GB1987/000721 1986-10-14 1987-10-14 Particle analysis apparatus WO1988002855A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868624587A GB8624587D0 (en) 1986-10-14 1986-10-14 Particle analysis apparatus
GB8624587 1986-10-14

Publications (1)

Publication Number Publication Date
WO1988002855A1 true WO1988002855A1 (en) 1988-04-21

Family

ID=10605708

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000721 WO1988002855A1 (en) 1986-10-14 1987-10-14 Particle analysis apparatus

Country Status (2)

Country Link
GB (1) GB8624587D0 (en)
WO (1) WO1988002855A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0392943A1 (en) * 1989-04-12 1990-10-17 Association De Gestion De L'ecole Francaise De Papeterie Et De L'imprimerie Arrangement for characterizing particles in suspension in a liquid
EP0402633A1 (en) * 1989-05-30 1990-12-19 Erwin Sick GmbH Optik-Elektronik Device for measuring aerosols and airborne dust
EP0403034A2 (en) * 1989-02-16 1990-12-19 Salzgitter Anlagenbau Zweigniederlassung der Preussag Anlagenbau GmbH Method and arrangement for analysing the size distribution of particles in a fluid production stream
WO1991010123A1 (en) * 1990-01-05 1991-07-11 Abb Stal Ab Method and device for detection of particles in flowing media
US5181419A (en) * 1989-11-27 1993-01-26 Schlumberger Technology Corporation Sampling of drilling mud
WO1998046979A1 (en) * 1997-04-14 1998-10-22 Micromeritics Instrument Corporation System and method for evenly suspending and circulating particles in a liquid
GB2364774A (en) * 2000-07-01 2002-02-06 Malvern Instr Ltd Sample handling system for a particle suspension
GB2369182A (en) * 2000-11-15 2002-05-22 Rusteck Ltd Optical detection of particles in a liquid medium
EP3026421A1 (en) * 2014-11-27 2016-06-01 Hach Lange GmbH A nephelometric process turbidimeter
EP3347694A4 (en) * 2015-07-01 2019-04-24 Manta Instruments, Inc. Special purpose cuvette assembly and method for optical microscopy of nanoparticles in liquids
US10698427B2 (en) 2016-10-31 2020-06-30 Ge Oil & Gas Pressure Control Lp System and method for assessing sand flow rate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200700A (en) * 1959-04-23 1965-08-17 Bowser Inc Photoelectric comparison apparatus for indicating the amount of contamination in liquids
US3354772A (en) * 1961-11-16 1967-11-28 Bowser Inc Instrument and process for testing contamination in liquid materials
FR2300337A1 (en) * 1975-02-04 1976-09-03 Cilas METHOD AND DEVICE FOR DETERMINING THE GRANULOMETRIC DISTRIBUTION OF A MIXTURE OF PARTICLES
FR2447548A1 (en) * 1979-01-29 1980-08-22 Chamourat Patrick Optical method for suspended particle detection - utilises diffusion and reflection of laser beam, with voltmeter used for indication of particle concentration
EP0106684A2 (en) * 1982-10-15 1984-04-25 Kabushiki Kaisha Toshiba Particle diameter measuring device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200700A (en) * 1959-04-23 1965-08-17 Bowser Inc Photoelectric comparison apparatus for indicating the amount of contamination in liquids
US3354772A (en) * 1961-11-16 1967-11-28 Bowser Inc Instrument and process for testing contamination in liquid materials
FR2300337A1 (en) * 1975-02-04 1976-09-03 Cilas METHOD AND DEVICE FOR DETERMINING THE GRANULOMETRIC DISTRIBUTION OF A MIXTURE OF PARTICLES
FR2447548A1 (en) * 1979-01-29 1980-08-22 Chamourat Patrick Optical method for suspended particle detection - utilises diffusion and reflection of laser beam, with voltmeter used for indication of particle concentration
EP0106684A2 (en) * 1982-10-15 1984-04-25 Kabushiki Kaisha Toshiba Particle diameter measuring device

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403034A2 (en) * 1989-02-16 1990-12-19 Salzgitter Anlagenbau Zweigniederlassung der Preussag Anlagenbau GmbH Method and arrangement for analysing the size distribution of particles in a fluid production stream
EP0403034A3 (en) * 1989-02-16 1991-08-28 Salzgitter Anlagenbau Zweigniederlassung der Preussag Anlagenbau GmbH Method and arrangement for analysing the size distribution of particles in a fluid production stream
FR2645961A1 (en) * 1989-04-12 1990-10-19 Ass Gestion Ecole Fr Papeterie DEVICE FOR DETERMINING CHARACTERISTICS OF PARTICLES SUSPENDED IN A LIQUID
US5087823A (en) * 1989-04-12 1992-02-11 Association De Gestion De L'ecole Francaise De Papeterie Et De L'imprimerie Device for determining the characteristics of particles in suspension in a liquid
EP0392943A1 (en) * 1989-04-12 1990-10-17 Association De Gestion De L'ecole Francaise De Papeterie Et De L'imprimerie Arrangement for characterizing particles in suspension in a liquid
EP0402633A1 (en) * 1989-05-30 1990-12-19 Erwin Sick GmbH Optik-Elektronik Device for measuring aerosols and airborne dust
US5181419A (en) * 1989-11-27 1993-01-26 Schlumberger Technology Corporation Sampling of drilling mud
WO1991010123A1 (en) * 1990-01-05 1991-07-11 Abb Stal Ab Method and device for detection of particles in flowing media
WO1998046979A1 (en) * 1997-04-14 1998-10-22 Micromeritics Instrument Corporation System and method for evenly suspending and circulating particles in a liquid
GB2364774B (en) * 2000-07-01 2004-06-23 Malvern Instr Ltd Sample handling system for use in a particle characterisation apparatus
GB2364774A (en) * 2000-07-01 2002-02-06 Malvern Instr Ltd Sample handling system for a particle suspension
GB2369182A (en) * 2000-11-15 2002-05-22 Rusteck Ltd Optical detection of particles in a liquid medium
GB2369182B (en) * 2000-11-15 2004-12-08 Rusteck Ltd Optical detection of particles in a liquid medium
US7209231B2 (en) 2000-11-15 2007-04-24 Rusteck Ltd. Optical detection of particles in a liquid medium
EP3026421A1 (en) * 2014-11-27 2016-06-01 Hach Lange GmbH A nephelometric process turbidimeter
CN105651734A (en) * 2014-11-27 2016-06-08 哈克兰格有限责任公司 Nephelometric process turbidimeter
US9546944B2 (en) 2014-11-27 2017-01-17 Hach Lange Gmbh Nephelometric process turbidimeter
CN105651734B (en) * 2014-11-27 2018-06-12 哈克兰格有限责任公司 Scattering formula process nephelometer
EP3347694A4 (en) * 2015-07-01 2019-04-24 Manta Instruments, Inc. Special purpose cuvette assembly and method for optical microscopy of nanoparticles in liquids
US10698427B2 (en) 2016-10-31 2020-06-30 Ge Oil & Gas Pressure Control Lp System and method for assessing sand flow rate

Also Published As

Publication number Publication date
GB8624587D0 (en) 1986-11-19

Similar Documents

Publication Publication Date Title
US5475486A (en) Flow cell system for turbidimeter
US10845289B2 (en) Apparatus and method for static sedimentation tests comprising a plurality of sedimentation cylinders, which are subject to the same mixing conditions
US6499344B2 (en) Apparatus and method to obtain representative samples of oil well production
WO1988002855A1 (en) Particle analysis apparatus
EP2062031B1 (en) Device for quantifying the content of at least one gaseous constituent contained in a gaseous sample from a fluid, related assembly and process
US3345910A (en) Colorimeter flow cell
US4804519A (en) Sample analysis apparatus
ATE99561T1 (en) ANALYSIS DEVICE FOR COLLECTING INDIVIDUAL LIQUID SAMPLES.
JPH02297039A (en) Method and apparatus for sampling gaseous matter contained in liquid
US4836017A (en) Method and apparatus for determining oil content of oil well production
US4720998A (en) Crude oil sampling system
US20100231904A1 (en) Method and Device for Measuring Hydrocarbons in Aqueous Solutions
US3812966A (en) Settling rate tester
US3869903A (en) Settling rate tester
US4025311A (en) Programmed fluid sampling and analysis apparatus
US3638476A (en) Oil and sampling system
US3617757A (en) Measurement of the concentration of solids in fluids
US4055986A (en) Basic sediment and water measurement
US4809543A (en) Apparatus and method for monitoring one liquid in another
US3924449A (en) Oil pollution totalizer
NO316193B1 (en) Method and apparatus for sampling in the gas outlet pipe of a liquid / gas separator fed with the outflow from an oil well
RU2264621C2 (en) Method and device for check, control and(or) adjustment of centrifuge
US4206650A (en) Device for introducing samples into fluid analyzer
GB2030963A (en) Liquid Sampling System
US20170342824A1 (en) Hydrocarbon Well Production Analysis System

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): NO US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE