Compositions of polymer systems, and their use for example...

Details Compositions of polymer systems, and their use for example... Compositions of polymer systems, and their use for example...

E - Fixed Constructions

21

B

31/22

E21B 43/267 (2006.01) C09K 8/68 (2006.01)

Patent

CA 1216417

IN THE CANADIAN PATENT OFFICE PATENT APPLICATION entitled : Improved compositions of polymer systems, and their use for example in hydraulic fracturing. ABSTRACT OF THE DISCLOSURE The invention relates to the improvement by a chelating agent of polymer compositions usable in parti- cular in the hydraulic facturing of underground formations close to a drilling well. The chelating agent is a compound such as fumaric acid, maleic acid or thiourea. Substantially shorter crosslinking time; use possible even with sea water or a brine.

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