Polymer mixtures for crosslinked fluids

Details Polymer mixtures for crosslinked fluids Polymer mixtures for crosslinked fluids

2005-09-16

2008-11-04

Gay, Jennifer H (Department: 3676)

Wells

Processes

Chemical inter-reaction of two or more introduced materials

C166S308500, C166S305100

Reexamination Certificate

active

07445044

ABSTRACT:
Treatment fluids comprising gelling agents that comprise crosslinkable polymers and certain biopolymers, and methods of use in subterranean operations, are provided. In one embodiment, the present invention provides a method of treating a portion of a subterranean formation comprising: providing a treatment fluid that comprises an aqueous base fluid, a crosslinking agent, and a gelling agent comprising a polymer that is a crosslinkable polymer, and a polymer that is a biopolymer wherein a molecule of the biopolymer (1) consists only of glucose, or (2) has a backbone comprising one or more units that comprise at least (a) one glucose unit and (b) one linear or cyclic pyranose-type monosaccharide unit, wherein (a) and (b) have different molecular structures; and introducing the treatment fluid into a well bore penetrating the subterranean formation.

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