WO2003006382A1 - Inhibiting scale deposition in oilfield tubulars - Google Patents

Inhibiting scale deposition in oilfield tubulars Download PDF

Info

Publication number
WO2003006382A1
WO2003006382A1 PCT/EP2002/007638 EP0207638W WO03006382A1 WO 2003006382 A1 WO2003006382 A1 WO 2003006382A1 EP 0207638 W EP0207638 W EP 0207638W WO 03006382 A1 WO03006382 A1 WO 03006382A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
tubular
acoustic waves
deposition
whistle
Prior art date
Application number
PCT/EP2002/007638
Other languages
French (fr)
Inventor
Jeroen Groenenboom
Sau-Wai Wong
Gerrit Nitters
Original Assignee
Shell Internationale Research Maatschappij B.V.
Shell Canada 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 Shell Internationale Research Maatschappij B.V., Shell Canada Limited filed Critical Shell Internationale Research Maatschappij B.V.
Priority to EP02767189A priority Critical patent/EP1419111A1/en
Priority to CA002453157A priority patent/CA2453157A1/en
Priority to US10/483,236 priority patent/US20040195187A1/en
Publication of WO2003006382A1 publication Critical patent/WO2003006382A1/en
Priority to NO20040062A priority patent/NO20040062L/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents

Definitions

  • the present invention relates to inhibiting the deposition of scale in a fluid that includes water and ions that can precipitate as scale and subsequently be deposited in a conduit, or to removing a scale layer that is formed in the conduit.
  • ⁇ inhibiting the deposition of scale' will be used to refer to both preventing the deposition of scale and to removing a scale layer.
  • the fluid can further include oil and gas. Common scales that are encountered are BaS ⁇ 4, CaS04,
  • the conduit through which the fluid flows can be a well tubular through which well fluids are passed to surface, or a pipeline.
  • the present invention particularly relates to preventing scale deposition by applying acoustic energy in the form of acoustic waves in the fluid.
  • German patent publication DE 2927671 discloses a method for preventing scale deposition in a heat exchanger at the earth surface.
  • the known device units acoustic waves in a compact heat exchanger chamber to inhibit scale deposition primarily on the outer well of a coiled heating tube inside the chamber. It is an object of the present invention to provide a method for inhibiting scale deposition in an elongate well or other oilfield tubular by applying acoustic waves without supplying external energy to the device that generates the acoustic waves.
  • the method according to the present invention for preventing scale deposition in a fluid that includes water and ions that can produce scale precipitation and deposition, which fluid flows through a well and/or other oilfield tubular comprises the steps of arranging a liquid whistle for producing acoustic waves in the fluid in the tubular, and allowing at least part of the fluid that flows through the conduit to pass through the liquid whistle to generate acoustic waves.
  • a whistle is a device for generating acoustic waves in a liquid-containing fluid, which device comprises a nozzle and a blade that is arranged downstream of the nozzle. During normal operation liquid flowing out of the nozzle forms a jet that impinges on the blade and flows over the blade.
  • the jet flow generates vortices in the fluid perpendicular to the fluid flow, which vortices cause the blade to vibrate and acoustic waves are generated.
  • Examples of liquid whistles are described in USA patent specifications No. 3 176 964 and No. 5 858 107.
  • An advantage of the present invention is that the fluid flowing through the conduit drives the acoustic whistle. Because the fluid flowing through the conduit drives the acoustic whistle no external power source is needed.
  • the acoustic whistle is so designed that at the prevailing flow rates the frequency of the acoustic waves emitted by the whistle is in the range of from 20 Hz to 30 kHz.
  • the frequency of the acoustic waves emitted by the whistle is in the range of from 20 Hz to 30 kHz.
  • more than one liquid whistle is arranged in the conduit .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Physical Water Treatments (AREA)

Abstract

Method for preventing scale deposition in a fluid that includes water and ions that can produce scale precipitation and deposition flowing through a well and/or other oil field tubular comprising arranging a liquid whistle for producing acoustic waves in the fluid in the tubular, and allowing at least part of the fluid that flows through the tubular to pass through the liquid whistle to generate acoustic waves.

Description

INHIBITING SCALE DEPOSITION IN OILFIELD TUBULARS
The present invention relates to inhibiting the deposition of scale in a fluid that includes water and ions that can precipitate as scale and subsequently be deposited in a conduit, or to removing a scale layer that is formed in the conduit. In the specification and in the claims, ^inhibiting the deposition of scale' will be used to refer to both preventing the deposition of scale and to removing a scale layer. The fluid can further include oil and gas. Common scales that are encountered are BaSθ4, CaS04,
CaSθ4-2H2θ, SrSθ and CaCOβ .
The conduit through which the fluid flows can be a well tubular through which well fluids are passed to surface, or a pipeline. The present invention particularly relates to preventing scale deposition by applying acoustic energy in the form of acoustic waves in the fluid.
The cleaning action of acoustic waves is well known, see for example USA patent specification No. 3 648 769. It is further known to remove sulphate scale by applying low-frequency acoustic energy, see International patent application' publication No. 96/07 763.
The known methods require that external energy is supplied to the device that generates the acoustic waves. German patent publication DE 2927671 discloses a method for preventing scale deposition in a heat exchanger at the earth surface. The known device units acoustic waves in a compact heat exchanger chamber to inhibit scale deposition primarily on the outer well of a coiled heating tube inside the chamber. It is an object of the present invention to provide a method for inhibiting scale deposition in an elongate well or other oilfield tubular by applying acoustic waves without supplying external energy to the device that generates the acoustic waves.
Accordingly the method according to the present invention for preventing scale deposition in a fluid that includes water and ions that can produce scale precipitation and deposition, which fluid flows through a well and/or other oilfield tubular, comprises the steps of arranging a liquid whistle for producing acoustic waves in the fluid in the tubular, and allowing at least part of the fluid that flows through the conduit to pass through the liquid whistle to generate acoustic waves. A whistle is a device for generating acoustic waves in a liquid-containing fluid, which device comprises a nozzle and a blade that is arranged downstream of the nozzle. During normal operation liquid flowing out of the nozzle forms a jet that impinges on the blade and flows over the blade. The jet flow generates vortices in the fluid perpendicular to the fluid flow, which vortices cause the blade to vibrate and acoustic waves are generated. Examples of liquid whistles are described in USA patent specifications No. 3 176 964 and No. 5 858 107.
An advantage of the present invention is that the fluid flowing through the conduit drives the acoustic whistle. Because the fluid flowing through the conduit drives the acoustic whistle no external power source is needed.
Suitably the acoustic whistle is so designed that at the prevailing flow rates the frequency of the acoustic waves emitted by the whistle is in the range of from 20 Hz to 30 kHz. Suitably more than one liquid whistle is arranged in the conduit .

Claims

C L I M S
1. Method for inhibiting scale deposition in a fluid that includes water and ions that can produce scale precipitation and deposition, which fluid flows through a well and/or other oilfield tubular, which method comprises the steps of arranging a whistle for producing acoustic waves in the fluid in the tubular, and allowing at least part of the fluid that flows through the tubular to pass through the whistle to generate acoustic waves.
2. The method of claim 1, wherein a series of whistles are arranged at selected intervals along at least part of the length of the tubular.
3. The method of claim 2, wherein said intervals are between 1 and 100 m.
4. The method of any preceding claim, wherein the tubular is a production tubing in an oil and/or gas production well.
5. The method of claim 1, wherein the whistle exits acoustic waves having a frequency in the range from 20 Hz to 30 kHz.
PCT/EP2002/007638 2001-07-09 2002-07-09 Inhibiting scale deposition in oilfield tubulars WO2003006382A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02767189A EP1419111A1 (en) 2001-07-09 2002-07-09 Inhibiting scale deposition in oilfield tubulars
CA002453157A CA2453157A1 (en) 2001-07-09 2002-07-09 Inhibiting scale deposition in oilfield tubulars
US10/483,236 US20040195187A1 (en) 2001-07-09 2002-07-09 Inhibiting scale deposition in oilfield tubulars
NO20040062A NO20040062L (en) 2001-07-09 2004-01-08 Procedure for preventing deposits in oilfield pipelines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01305888 2001-07-09
EP01305888.8 2001-07-09

Publications (1)

Publication Number Publication Date
WO2003006382A1 true WO2003006382A1 (en) 2003-01-23

Family

ID=8182084

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/007638 WO2003006382A1 (en) 2001-07-09 2002-07-09 Inhibiting scale deposition in oilfield tubulars

Country Status (5)

Country Link
US (1) US20040195187A1 (en)
EP (1) EP1419111A1 (en)
CA (1) CA2453157A1 (en)
NO (1) NO20040062L (en)
WO (1) WO2003006382A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8025899B2 (en) 2003-08-28 2011-09-27 Abbott Laboratories Solid pharmaceutical dosage form
US9107830B2 (en) 1999-11-12 2015-08-18 Abbvie, Inc. Inhibitors of crystallization in a solid dispersion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100288492A1 (en) * 2009-05-18 2010-11-18 Blackman Michael J Intelligent Debris Removal Tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927671A1 (en) * 1979-07-09 1981-01-29 Theodor Prof Dr Ing Rummel Heat-exchanger deposit-prevention equipment - comprises ultrasonic emitter causing walls to vibrate
US5717181A (en) * 1996-05-13 1998-02-10 University Of Florida Method of reducing concentration of high molecular weight component in mixture of components

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176964A (en) * 1961-01-05 1965-04-06 Sonic Eng Corp Method and apparatus for producing acoustic vibrations in fluids
US3648769A (en) * 1970-09-04 1972-03-14 Beehler Vernon D Well cleaner
US5858107A (en) * 1998-01-07 1999-01-12 Raytheon Company Liquid carbon dioxide cleaning using jet edge sonic whistles at low temperature

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927671A1 (en) * 1979-07-09 1981-01-29 Theodor Prof Dr Ing Rummel Heat-exchanger deposit-prevention equipment - comprises ultrasonic emitter causing walls to vibrate
US5717181A (en) * 1996-05-13 1998-02-10 University Of Florida Method of reducing concentration of high molecular weight component in mixture of components

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9107830B2 (en) 1999-11-12 2015-08-18 Abbvie, Inc. Inhibitors of crystallization in a solid dispersion
US8025899B2 (en) 2003-08-28 2011-09-27 Abbott Laboratories Solid pharmaceutical dosage form
US8268349B2 (en) 2003-08-28 2012-09-18 Abbott Laboratories Solid pharmaceutical dosage form
US8309613B2 (en) 2003-08-28 2012-11-13 Abbvie Inc. Solid pharmaceutical dosage form
US8333990B2 (en) 2003-08-28 2012-12-18 Abbott Laboratories Solid pharmaceutical dosage form
US8399015B2 (en) 2003-08-28 2013-03-19 Abbvie Inc. Solid pharmaceutical dosage form
US8691878B2 (en) 2003-08-28 2014-04-08 Abbvie Inc. Solid pharmaceutical dosage form

Also Published As

Publication number Publication date
CA2453157A1 (en) 2003-01-23
US20040195187A1 (en) 2004-10-07
EP1419111A1 (en) 2004-05-19
NO20040062L (en) 2004-01-08

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