Compositions and applications thereof of water-soluble copolymer

Details Compositions and applications thereof of water-soluble copolymer Compositions and applications thereof of water-soluble copolymer

1993-08-09

1998-11-03

Henderson, Christopher

Wells

Processes

Cementing, plugging or consolidating

166300, E21B 3313

Patent

active

058295275

ABSTRACT:
Polymer compositions and their applications in hostile environments for oil field operations are disclosed. The compositions contains a polymer which is copolymerized by (a) an ampholytic monomer having the formula of: ##STR1## where one and only one of the substituted groups R.sub.1, R.sub.2, R.sub.3 and R.sub.4 must be a vinyl group, the rest can be the same or different and can be hydrogen or a C.sub.1 -C.sub.3 alkyl group; R.sub.5 is a phenyl group; n is .gtoreq.1 and .ltoreq.6; and q is 0 or 1; (b) at least one comonomer having an ethylenic linkage. The compositions further contain crosslinking agents, such as phenol and formaldehyde, for reducing permeability in a high temperature subterranean formation; and water for use in well treating fluids.

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Chem. Abstr. 77:165125, synthesis and polymerization of vinylimidazole salts.

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