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US 5,207,934 AGranted
Crosslinked hydroxyethylcellulose and its uses
AssigneeUnion Oil Company of California
InventorsHoai T. Dovan, Richard D. Hutchins
Life of this patent
Estimating the term…
Abstract
Polymers (and especially hydroxyethylcellulose) are crosslinked using a lanthanide as a crosslinking agent. The crosslinked polymers have utility in well completion, well stimulation, enhanced oil recovery, and subterranean fluid containment operations.
Claims22
A composition capable of forming a gel, the composition comprising:
- (a) hydroxyethylcellulose;
- (b) a lanthanide;
- and
- (c) an ingredient selected from the group consisting of gel breakers, sequestering agents, proppants suitable for use in hydraulically fracturing subterranean formations, and particulate agents suitable for use in forming a gravel pack.
1 more element
A composition capable of forming a gel, the composition comprising:
- (a) a crosslinkable polymer selected from the group consisting of cellulose ethers and ammonium and alkali metal salts thereof, the cellulose ether being selected from the group consisting of carboxyalkylhydroxyethyl celluloses and hydroxyethylcellulose;
- (b) a lanthanide;
- and
- (c) an ingredient selected from the group consisting of gel breakers, sequestering agents, proppants suitable for use in hydraulically fracturing subterranean formations, and particulate agents suitable for use in forming a gravel pack.
1 more element
A composition capable of forming a gel, the composition comprising:
- (a) about 1,000 to about 10,000 ppm hydroxyethylcellulose;
- and
- (b) a lanthanide.
Dependencies are inferred from the claim text.