EP0241056A1 - Mélangeurs pour des matériaux pulvérulents et liquides ou des matériaux liquide-liquide - Google Patents

Mélangeurs pour des matériaux pulvérulents et liquides ou des matériaux liquide-liquide Download PDF

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Publication number
EP0241056A1
EP0241056A1 EP87200346A EP87200346A EP0241056A1 EP 0241056 A1 EP0241056 A1 EP 0241056A1 EP 87200346 A EP87200346 A EP 87200346A EP 87200346 A EP87200346 A EP 87200346A EP 0241056 A1 EP0241056 A1 EP 0241056A1
Authority
EP
European Patent Office
Prior art keywords
mixer
liquid
rotor
jet pump
complying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87200346A
Other languages
German (de)
English (en)
Inventor
Ronald Sherwood
James Althouse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie des Services Dowell Schlumberger SA
Original Assignee
Compagnie des Services Dowell Schlumberger SA
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 Compagnie des Services Dowell Schlumberger SA filed Critical Compagnie des Services Dowell Schlumberger SA
Publication of EP0241056A1 publication Critical patent/EP0241056A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/74—Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs
    • B01F25/743—Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs the material being fed on both sides of a part rotating about a vertical axis

Definitions

  • the invention consists of a device for mixing a pulverous material with a liquid, essentially powdered cement and water.
  • the application most particularly envisaged is the cementing of oil wells, gas wells, geothermal or other wells.
  • the present document discusses a mixer with two rotors coupled within a single casing: an upper rotor receives granular material at its center by simple gravity feed through a central opening in the casing upper part, and projects this material towards the motor rim, while liquid arrives through a central opening in the underside of the lower rotor, to be projected by centrifugal action towards the rotor periphery. Mixing of the granular material and the liquid occurs in the peripheral area between the two rotors, the mixture being drawn off through the casing by a suitable discharge system.
  • the mixer thus described operates to full satisfaction when the granular material is sand and the liquid is a gel.
  • the equipment in question does not allow easy adjustments to the density of the mix obtained, while it is an established fact that successful cementing of oil wells depends on precise and easy density control of the cement used.
  • the purpose of the invention presented herein is to offer a mixer meeting the type requirements outlined above, but ensuring satisfactory operation even with fine powders.
  • the invention is in particular intended to cater for cement powders and in the preferred design, allows for extremely simple yet highly precise density adjustment.
  • the invention assures these aims by proposing a centrifugal mixer with a casing containing a high speed rotor and into which the fluid feed is discharged via an inlet.
  • a pulverous material (or second liquid) feed system is also provided, together with an outlet for evacuating the mix at a pressure greater than atmospheric pressure.
  • the pulverous material feed system comprises a jet pump receiving the pumping fluid through the finished mix return line.
  • the mixer advantageously features air evacuation means in the mixing area, and a second rotor for pressurizing the fluid by centrifugal action.
  • the jet pump drive fluid is provided by internal recirculation (via a line tapped into the mixer pressure zone), therefore avoiding additional material requirements.
  • the density of the mix can be adjusted by simple control of the pulverous material feed (via a valve controlling opening of the powder hopper run-off).
  • mixer pressure zone area into which the recirculating line is tapped
  • zone rich in pressurized fluid (partially mixed).
  • Such a zone will exist particularly if the peripheral area around the rotors is partly divided by a plate mounted on the rotors.
  • a separation is not indispensable, but ensures that the mixture passing through the jet pump is not denser than the mix obtained around the periphery of the centrifuging rotor ("slinger"). On the other hand, this separator plate leads to a slight drop in efficiency.
  • the mixer operates to such a high level of efficiency that the density of the mix in all areas of the peripheral mixing area (i.e. top or bottom) - and therefore the density of the delivered mix - is constant.
  • the proposed system has other benefits discussed below.
  • the system contains no more moving parts than existing systems. Maintenance, including cleaning, is simple and equipment reliability is excellent.
  • mixer (1) has a casing (2) containing upper rotor (3) (also known as a "slinger") and lower centrifuging rotor (4) ("impeller").
  • Casing (2) can consist of an upper and a lower shell assembled by parts that are not illustrated.
  • Rotors (3) and (4) are mounted on the end of shaft (5) which is driven by motor (6) mounted on support (15) (see Figure 2).
  • Centrifuging rotor (4) is so designed that its rotation generates a vortex that in turn produces a zone of suction (7) in the region of lower orifice (8); inlet (9) (for water or more generally, fluids) is mounted at this orifice and water is drawn in through orifice (8) then delivered under pressure towards the outer edge of the lower rotor, and generally distributed around the full outer limit of the mixer.
  • Upper rotor (3) is so configured that pulverous material fed in through chamber (14) adjacent to upper inlet orifice (10), is thrown towards the peripheral zone of the rotor and generally projected around the full outer limit of the mixer, where it is integrally mixed with the water (itself in full agitation).
  • the (pressurized) mix is evacuated through outlet (11) located in the mixer outer limit.
  • Mixer (1) is integrated into a mixing circuit ( Figure 2) comprising mixing water tank (20) that delivers into inlet (9) in the lower part of the mixer; feed hopper (21) holding pulverous material and connecting with chamber (14) that feeds into the upper part of the mixer; high-pressure pump (22) which receives the mixture fed from outlet (11) via delivery line (28). Pump (22) delivers the finished mix (for example, liquid cement for cementing an oil well).
  • a mixing circuit Figure 2 comprising mixing water tank (20) that delivers into inlet (9) in the lower part of the mixer; feed hopper (21) holding pulverous material and connecting with chamber (14) that feeds into the upper part of the mixer; high-pressure pump (22) which receives the mixture fed from outlet (11) via delivery line (28). Pump (22) delivers the finished mix (for example, liquid cement for cementing an oil well).
  • the invention allows for a forced pulverulent feed system employing a fluid jet pump (23) located upstream of valve (24) controlling the run-off of hopper (21); the jet pump drive fluid is obtained via recirculating line (25) that draws from the high-presure zone of the mixer (that is, around the rotor peripheries).
  • Recirculating line (25) can draw from (29) in the rotor lower zone (where the mix is heavier in water) if separator plate (35) is fitted between rotors (3) and (4) (installed on rotor (4)), although as indicated above, such a plate is not indispensable.
  • the fluid drive can be picked directly off outlet (11) or delivery line (28); in this case, the jet pump drive will be the water/cement mix proper.
  • the jet pump entrains the powder; the flowrate of the latter is controlled by valve (24) (butterfly valve or slide valve, for example) located inside line (26) that arrives tangentially inside chamber (14).
  • valve (24) (butterfly valve or slide valve, for example) located inside line (26) that arrives tangentially inside chamber (14).
  • the top of the chamber is left open for admission of air, and the chamber itself fits into mixer upper opening (10), leaving another air passage.
  • Line (26) and chamber (14) must form a single part.
  • the jet pump is of the annular type, the assembly consisting of (23) and (26) is replaced by annular slot (36), or a series of circumferentially spaced slots, cut directly into chamber (14); in this case, the latter is placed immediately below the adjustable bottom run-off of the hopper.
  • Hopper (21) is of the pneumatic or gravity feed type, or both.
  • the volume of cement delivered by pump (22) to the upstream well is constant and is determined by the pump speed.
  • the rate of offtake of mixed material through (11) is therefore constant, or can easily be maintained so.
  • the mixer flow schedule dictates that water inflow (8) is a direct function of powder inflow (10), which can easily be controlled by valve (24).
  • Density meter (27) is mounted in the recirculation line and/or on delivery line (28), particularly if the recirculation line is tapped into the latter. Where this is the case, the pick-off is downstream of the density meter. It is an advantage to install valve (37) also in line (28) to allow full recirculating of the mix through jet pump (23) at start-up (when the cement content of the mix is somewhat low).
  • a determining factor in correct operation of the equipment is the provision of satisfactory means for evacuating the air brought in via jet pump (23) with the powder feed.
  • air evacuation cavity (30) is provided between rotors (3) and (4) - this communicates with mixer upper central zone (32) via ducts (31) drilled obliquely through upper rotor (3). Air can escape from zone (32) via the passage left between orifice (10) and chamber (14). Air evacuation cavity (30) could be formed by spacers on attach parts (12) and (13).
  • inter-rotor separator plate (35) If inter-rotor separator plate (35) is to be fitted, the air evacuation system allows for a passage between the upper part of the mixer peripheral zone, and zone (32). In this case, provision would be made for a number of orifices in plate (35) to allow for evacuation of air entrapped beneath the plate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP87200346A 1986-03-27 1987-02-26 Mélangeurs pour des matériaux pulvérulents et liquides ou des matériaux liquide-liquide Withdrawn EP0241056A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8604670 1986-03-27
FR8604670A FR2596290B1 (fr) 1986-03-27 1986-03-27 Dispositif pour le melange d'un materiau pulverulent et d'un liquide, ou liquide-liquide

Publications (1)

Publication Number Publication Date
EP0241056A1 true EP0241056A1 (fr) 1987-10-14

Family

ID=42111709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87200346A Withdrawn EP0241056A1 (fr) 1986-03-27 1987-02-26 Mélangeurs pour des matériaux pulvérulents et liquides ou des matériaux liquide-liquide

Country Status (8)

Country Link
EP (1) EP0241056A1 (fr)
JP (1) JPS631506A (fr)
CN (1) CN87102249A (fr)
BR (1) BR8701381A (fr)
FR (1) FR2596290B1 (fr)
NO (1) NO871263L (fr)
OA (1) OA08579A (fr)
SU (1) SU1570644A3 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445875A1 (fr) * 1990-03-09 1991-09-11 Sofitech N.V. Procédé et appareil pour mélanger des solides et des fluides
EP0452530A1 (fr) * 1990-04-20 1991-10-23 BRAN + LUEBBE GmbH Dispositif de mélange
DE19833307A1 (de) * 1998-07-24 2000-01-27 Bran & Luebbe Anlage zum Mischen mit Reinigungsvorrichtung
CN102350237A (zh) * 2011-09-06 2012-02-15 山东源根石油化工有限公司 一种固液无尘静态混合系统
CN106457178A (zh) * 2014-02-27 2017-02-22 施蓝姆伯格技术公司 具有定子的混合设备和方法
US10137420B2 (en) 2014-02-27 2018-11-27 Schlumberger Technology Corporation Mixing apparatus with stator and method
US10625933B2 (en) 2013-08-09 2020-04-21 Schlumberger Technology Corporation System and method for delivery of oilfield materials
US10633174B2 (en) 2013-08-08 2020-04-28 Schlumberger Technology Corporation Mobile oilfield materialtransfer unit
US10895114B2 (en) 2012-08-13 2021-01-19 Schlumberger Technology Corporation System and method for delivery of oilfield materials
US11453146B2 (en) 2014-02-27 2022-09-27 Schlumberger Technology Corporation Hydration systems and methods
US11819810B2 (en) 2014-02-27 2023-11-21 Schlumberger Technology Corporation Mixing apparatus with flush line and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2504429C1 (ru) * 2012-10-05 2014-01-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет" (СПбГУ) Устройство для получения диффузионных полимерных мембран
CN105251403A (zh) * 2015-11-06 2016-01-20 四机赛瓦石油钻采设备有限公司 一种增压混合装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326536A (en) * 1962-05-09 1967-06-20 Dow Chemical Co Mixing apparatus
US4099005A (en) * 1977-03-30 1978-07-04 Olin Corporation Apparatus and method for dispensing solids into a liquid medium
US4426156A (en) * 1982-08-13 1984-01-17 Pennwalt Corporation Polyelectrolyte wetting apparatus
US4453829A (en) * 1982-09-29 1984-06-12 The Dow Chemical Company Apparatus for mixing solids and fluids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326536A (en) * 1962-05-09 1967-06-20 Dow Chemical Co Mixing apparatus
US4099005A (en) * 1977-03-30 1978-07-04 Olin Corporation Apparatus and method for dispensing solids into a liquid medium
US4426156A (en) * 1982-08-13 1984-01-17 Pennwalt Corporation Polyelectrolyte wetting apparatus
US4453829A (en) * 1982-09-29 1984-06-12 The Dow Chemical Company Apparatus for mixing solids and fluids

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445875A1 (fr) * 1990-03-09 1991-09-11 Sofitech N.V. Procédé et appareil pour mélanger des solides et des fluides
EP0452530A1 (fr) * 1990-04-20 1991-10-23 BRAN + LUEBBE GmbH Dispositif de mélange
DE19833307A1 (de) * 1998-07-24 2000-01-27 Bran & Luebbe Anlage zum Mischen mit Reinigungsvorrichtung
CN102350237A (zh) * 2011-09-06 2012-02-15 山东源根石油化工有限公司 一种固液无尘静态混合系统
US10895114B2 (en) 2012-08-13 2021-01-19 Schlumberger Technology Corporation System and method for delivery of oilfield materials
US10633174B2 (en) 2013-08-08 2020-04-28 Schlumberger Technology Corporation Mobile oilfield materialtransfer unit
US10625933B2 (en) 2013-08-09 2020-04-21 Schlumberger Technology Corporation System and method for delivery of oilfield materials
US10137420B2 (en) 2014-02-27 2018-11-27 Schlumberger Technology Corporation Mixing apparatus with stator and method
EP3110539A4 (fr) * 2014-02-27 2017-11-08 Services Pétroliers Schlumberger Appareil de mélange avec stator et procédé de mélange
CN106457178B (zh) * 2014-02-27 2020-11-06 施蓝姆伯格技术公司 具有定子的混合设备和方法
CN106457178A (zh) * 2014-02-27 2017-02-22 施蓝姆伯格技术公司 具有定子的混合设备和方法
US11453146B2 (en) 2014-02-27 2022-09-27 Schlumberger Technology Corporation Hydration systems and methods
US11819810B2 (en) 2014-02-27 2023-11-21 Schlumberger Technology Corporation Mixing apparatus with flush line and method

Also Published As

Publication number Publication date
FR2596290A1 (fr) 1987-10-02
CN87102249A (zh) 1987-12-16
FR2596290B1 (fr) 1990-09-14
SU1570644A3 (ru) 1990-06-07
JPS631506A (ja) 1988-01-06
NO871263D0 (no) 1987-03-26
BR8701381A (pt) 1987-12-29
OA08579A (en) 1988-09-30
NO871263L (no) 1987-09-28

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Inventor name: SHERWOOD, RONALD