Acidized fracturing fluids containing high molecular weight...

Details Acidized fracturing fluids containing high molecular weight... Acidized fracturing fluids containing high molecular weight...

E - Fixed Constructions

21

B

31/22

E21B 43/22 (2006.01) C08F 8/12 (2006.01) C08F 26/02 (2006.01) C09K 3/00 (2006.01) E21B 21/00 (2006.01) E21B 43/00 (2006.01) E21B 43/26 (2006.01) E21B 43/27 (2006.01) D21H 17/34 (2006.01)

Patent

CA 1308897

186-P-USO3715 ABSTRACT The inverse emulsion polymerization of a monomer of the formula Image wherein R and R represent hydrogen or a C1-C4 alkyl'group, using a surfactant system having a hydrophilic-lipophilic balance value from 4 to 9, an azo-type free radical initiator and certain hydrocarbon liquids to yield a water-in-oil emulsion of a homopolymer of at least 106 average molecular weight, the emulsion having a viscosity less than 10 cps, at 15% solids, 60 rpm Brookfield and 20°C. Also disclosed is the preparation of poly(vinylamines) of at least 106 average molecular weight by acid or base hydrolysis of the homopoly- mer emulsion. Also disclosed are enhanced oil recovery compositions, drilling mud compositions, cements for drilling holes, completion fluids, acidized fracturing fluids, and wet-end paper additives containing the poly(vinylamines) and demonstrating superior properties.

569322

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