CA2037974A1 - Method and composition for delaying the gellation of borated gallactomannans - Google Patents

Method and composition for delaying the gellation of borated gallactomannans

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Publication number
CA2037974A1
CA2037974A1 CA 2037974 CA2037974A CA2037974A1 CA 2037974 A1 CA2037974 A1 CA 2037974A1 CA 2037974 CA2037974 CA 2037974 CA 2037974 A CA2037974 A CA 2037974A CA 2037974 A1 CA2037974 A1 CA 2037974A1
Authority
CA
Canada
Prior art keywords
cross
linking
additive
borate ions
complexor
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 2037974
Other languages
French (fr)
Other versions
CA2037974C (en
Inventor
Jeffrey C. Dawson
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.)
BJ Services Co USA
Original Assignee
Jeffrey C. Dawson
Bj Services Company
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
Priority claimed from US07/465,903 external-priority patent/US5082579A/en
Application filed by Jeffrey C. Dawson, Bj Services Company filed Critical Jeffrey C. Dawson
Priority to CA 2037974 priority Critical patent/CA2037974C/en
Publication of CA2037974A1 publication Critical patent/CA2037974A1/en
Application granted granted Critical
Publication of CA2037974C publication Critical patent/CA2037974C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)
  • Colloid Chemistry (AREA)
  • Lubricants (AREA)

Abstract

A complexor and method of use are shown for providing controlled delay of the cross-linking reaction in an aqueous well fracturing fluid. A base fluid is first prepared by blending together an aqueous fluid and a hydratable polymer which is capable of gelling in the presence of borate ions.
The complexor is prepared by mixing a cross-linking additive capable of furnishing borate ions in solution with a delay additive. The delay additive is effective, within a selected pH range, to chemically bond with both boric acid and the borate ions produced by the cross-linking additive to thereby limit the number of borate ions initially available in solution for subsequent cross-linking of the hydratable polysaccharide. The subsequent rate of cross-linking of the polysaccharide can be controlled by adjusting the pH of the complexor solution.
CA 2037974 1990-01-16 1991-03-11 Method and composition for delaying the gellation of borated gallactomannans Expired - Lifetime CA2037974C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2037974 CA2037974C (en) 1990-01-16 1991-03-11 Method and composition for delaying the gellation of borated gallactomannans

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/465,903 US5082579A (en) 1990-01-16 1990-01-16 Method and composition for delaying the gellation of borated galactomannans
CA 2037974 CA2037974C (en) 1990-01-16 1991-03-11 Method and composition for delaying the gellation of borated gallactomannans

Publications (2)

Publication Number Publication Date
CA2037974A1 true CA2037974A1 (en) 1992-09-12
CA2037974C CA2037974C (en) 2001-07-03

Family

ID=25674507

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2037974 Expired - Lifetime CA2037974C (en) 1990-01-16 1991-03-11 Method and composition for delaying the gellation of borated gallactomannans

Country Status (1)

Country Link
CA (1) CA2037974C (en)

Also Published As

Publication number Publication date
CA2037974C (en) 2001-07-03

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202