CA2102769A1 - Encapsulated Acid Composition and Process for Preparing and Using Same - Google Patents

Encapsulated Acid Composition and Process for Preparing and Using Same

Info

Publication number
CA2102769A1
CA2102769A1 CA 2102769 CA2102769A CA2102769A1 CA 2102769 A1 CA2102769 A1 CA 2102769A1 CA 2102769 CA2102769 CA 2102769 CA 2102769 A CA2102769 A CA 2102769A CA 2102769 A1 CA2102769 A1 CA 2102769A1
Authority
CA
Canada
Prior art keywords
acid
aqueous solution
polymer
emulsion
encapsulated
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.)
Granted
Application number
CA 2102769
Other languages
French (fr)
Other versions
CA2102769C (en
Inventor
Valmore Rodriguez
Vincenzo Savino
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.)
Intevep SA
Original Assignee
Valmore Rodriguez
Vincenzo Savino
Intevep, S.A.
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 Valmore Rodriguez, Vincenzo Savino, Intevep, S.A. filed Critical Valmore Rodriguez
Publication of CA2102769A1 publication Critical patent/CA2102769A1/en
Application granted granted Critical
Publication of CA2102769C publication Critical patent/CA2102769C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/72—Eroding chemicals, e.g. acids

Abstract

An encapsulated acid composition includes an aqueous solution of acid encapsulated in a polymeric material which is chemically resistant to the acid in the aqueous solution of acid and which polymeric material is substantially impermeable to water and acid. The composition is prepared according to a process including the steps of forming an emulsion having a continuous phase of oil and a dispersed phase of an aqueous solution of acid; mixing the emulsion with a polymer which is soluble in said oil and insoluble in the aqueous solution of acid, the polymer being chemically resistant to the acid in the aqueous solution of acid and the polymer being substantially impervious to the acid and to water; and mixing the emulsion and the polymer with a cross-linking agent so as to encapsulate droplets of the dispersed phase of the aqueous solution of acid in a cross-linked polymer encapsulant.
CA 2102769 1992-11-25 1993-11-09 Encapsulated acid composition and process for preparing and using same Expired - Fee Related CA2102769C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US98140592A 1992-11-25 1992-11-25
US981,405 1992-11-25

Publications (2)

Publication Number Publication Date
CA2102769A1 true CA2102769A1 (en) 1994-05-26
CA2102769C CA2102769C (en) 1998-04-14

Family

ID=25528336

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2102769 Expired - Fee Related CA2102769C (en) 1992-11-25 1993-11-09 Encapsulated acid composition and process for preparing and using same

Country Status (3)

Country Link
CA (1) CA2102769C (en)
DE (1) DE4339801A1 (en)
GB (1) GB2273484B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6761220B2 (en) * 2002-02-01 2004-07-13 Halliburton Energy Services, Inc. Treatment of a well with an encapsulated liquid and process for encapsulating a liquid
JP2004249817A (en) * 2003-02-19 2004-09-09 Denso Corp Electronic control device and control system having a plurality of electronic control devices
US20080314594A1 (en) * 2007-06-25 2008-12-25 Still John W Method of Heterogeneous Etching of Sandstone Formations
US8863841B2 (en) 2011-03-02 2014-10-21 Basf Se Alkanesulfonic acid microcapsules and use thereof in deep wells
DK2681291T3 (en) * 2011-03-02 2016-02-08 Basf Se ALKANSULPHONIC ACID MICROCAPLES AND THEIR USE IN DEPTH BORING

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163219A (en) * 1961-06-22 1964-12-29 Atlantic Refining Co Borate-gum gel breakers
JPS558856A (en) * 1978-07-05 1980-01-22 Mitsubishi Paper Mills Ltd Covering of finely dispersed liquid droplet with thin film
US4923753A (en) * 1987-03-26 1990-05-08 The Dow Chemical Company Controlled-release compositions for acids
JPS6475686A (en) * 1987-09-17 1989-03-22 Sumitomo Metal Mining Co Etchant and etching method using same
US5110486A (en) * 1989-12-14 1992-05-05 Exxon Research And Engineering Company Breaker chemical encapsulated with a crosslinked elastomer coating

Also Published As

Publication number Publication date
GB2273484B (en) 1996-08-07
GB9324145D0 (en) 1994-01-12
DE4339801A1 (en) 1994-05-26
CA2102769C (en) 1998-04-14
GB2273484A (en) 1994-06-22

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Legal Events

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EEER Examination request
MKLA Lapsed