# US 9,040,466 B2 · Oxygen scavenger compositions for completion brines

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- Number: US 9,040,466 B2
- Document ID: US9040466B2
- Status: Granted
- Kind: B2
- Application number: 13/784,755
- Filed: 2013-03-04
- Published: 2013-07-11
- Granted: 2015-05-26
- Earliest claimed: 2010-11-16
- Assignees: Halliburton Energy Services, Inc.
- Applicants: Halliburton Energy Services, Inc.
- Inventors: Jay Paul Deville
- Web page: https://patentgrep.com/patent/US9040466B2

## CPC

- C09K 8/86: containing organic compounds
- C09K 8/06: Clay-free compositions (containing inorganic compounds only C09K8/05)
- C09K 8/08: containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K 8/54: Compositions for in situ inhibition of corrosion in boreholes or wells
- C23F 11/10: using organic inhibitors
- C23F 11/124: {Carboxylic acids}
- C23F 11/142: {Hydroxy amines}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C23F: NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25

## Abstract

An oxygen scavenger for completion brines effective and stable in high temperature subterranean formations. In one embodiment, the scavenger contains erythorbate and alkylhydroxlyamine.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The fluid of claim 1 wherein the fluid has an oxygen content of less than about 1 mg/L at temperatures of about 275° F. to about 500° F.

### Claim 3 (depends on 1)

The fluid of claim 1 wherein the fluid has an oxygen content of less than about 0.5 mg/L at temperatures of about 275° F. to about 500° F.

### Claim 4 (depends on 1)

The fluid of claim 1 wherein the alkylhydroxylamine is selected from the group consisting of isopropylhydroxylamine, diethylhydroxylamine, tert-butylhydroxylamine, phenylhydroxylamine, cyclohexylhydroxylamine, and benzylhydroxylamine.

### Claim 5 (depends on 1)

The fluid of claim 1 wherein the oxygen scavenger comprises a blend of 0.01% w/w to 75% w/w of the compound and 25% w/w to 99.9% w/w of a solution comprising the alkylhydroxylamine.

### Claim 6 (depends on 5)

The fluid of claim 5 wherein the compound comprises erythorbate.

### Claim 7 (depends on 1)

The fluid of claim 1 wherein the oxygen scavenger comprises a blend of 10% w/w of the compound and 90% w/w of a solution comprising the alkylhydroxylamine.

### Claim 8 (depends on 7)

The fluid of claim 7 wherein the compound comprises erythorbate.