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US 9,040,466 B2Granted
Oxygen scavenger compositions for completion brines
AssigneeHalliburton Energy Services, Inc.
InventorJay Paul Deville
Life of this patent
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Abstract
An oxygen scavenger for completion brines effective and stable in high temperature subterranean formations. In one embodiment, the scavenger contains erythorbate and alkylhydroxlyamine.
Claims8
An aqueous completion fluid comprising:
- brine that is clear and colorless;
- and an oxygen scavenger comprising a blend of alkylhydroxylamine and a compound selected from the group consisting of:
- erythorbate;
- ascorbate;
- ascorbic acid;
- and erythorbic acid, the fluid remaining clear and colorless having an NTU (nephelometric turbidity unit) of less than about 20 at temperatures of about 275° F. to about 500° F.
3 more elements
Dependencies are inferred from the claim text.