Novel corrosion inhibitor for various acids
AssigneeFluid Energy Group Ltd.
InventorsClay PURDY, Markus WEISSENBERGER
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Abstract
A liquid corrosion inhibitor composition for use with acid compositions for use in industrial activities, said corrosion inhibitor composition comprising: a thiourea derivative; a first type of amphoteric surfactant is selected from the group consisting of: a sultaine surfactant; a betaine surfactant; and combinations thereof; a second type of amphoteric surfactant; and a solvent.
Claims24
A liquid corrosion inhibitor composition for use with a chrome-friendly modified acid composition for use in downhole oil industry activities, said corrosion inhibitor composition comprising:
- a thiourea derivative;
- a first type of amphoteric surfactant is selected from the group consisting of:
- a sultaine surfactant;
- a betaine surfactant;
- and combinations thereof;
- a second type of amphoteric surfactant;
- and
- a solvent.
(canceled)
A modified acid composition comprising an acid selected from the group consisting of:
- HCl;
- HCl-urea;
- phosphoric acid-urea, and a phosphoric acid derivative;
- and a corrosion inhibitor composition comprising:
- a thiourea derivative;
- a betaine surfactant;
- an amphoteric surfactant;
- and
- a solvent.
-38. (canceled)
Dependencies are inferred from the claim text.