Hydrazide containing polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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Details

166294, 166295, 523131, E21B 3313, C08L 6100

Patent

active

044749031

ABSTRACT:
A method for reducing formation permeability comprising mixing (a) a homopolymer or copolymer of methyl acrylate or hydroxy alkyl acrylate, where the alkyl group is C.sub.2, C.sub.3 or C.sub.4, into which polymer hydrazide groups have been introduced, and (b) an aldehyde cross-linking agent, dispersing the mixture in an aqueous medium and injecting the aqueous dispersion into a formation, the amounts of the polymer and aldehyde being such that they will form a gel in the aqueous medium. The invention includes compositions for use in the method.

REFERENCES:
patent: 3809160 (1974-05-01), Routson
patent: 3833061 (1974-09-01), Gall
patent: 3926258 (1975-12-01), Hessert et al.

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