Corrosion inhibitor for various acids
AssigneeDorf Ketal Chemicals Fze
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.
Claims17
A composition for use with a chrome-friendly modified acid composition for use in downhole oil industry activities, wherein the composition consists of:
- 10% to 80% by weight of a thiourea derivative;
- 5% to 75% by weight of a first amphoteric surfactant selected from the group consisting of:
- a sultaine surfactant, a betaine surfactant, and combinations thereof;
- 5% to 75% by weight of a second amphoteric surfactant;
- and
- 10% to 80% by weight of a solvent selected from the group consisting of:
- water, methanol, ethanol, isopropanol, and combinations thereof,
- wherein the composition is a liquid corrosion inhibitor composition.
A modified acid composition having a pH of no more than about 1 and comprising an acid selected from the group consisting of:
- HCl-urea in a molar ratio ranging from 0.1:1.0, phosphoric acid-urea in a molar ratio of not less than 0.1:1, and a phosphoric acid derivative;
- and a composition consisting of:
- 10% to 80% by weight of a thiourea derivative;
- 5% to 75% by weight of a betaine surfactant;
- 5% to 75% by weight of an amphoteric surfactant;
- and
- 10% to 80% by weight of a solvent.
A composition for use with a chrome-friendly modified acid composition for use in downhole oil industry activities, said composition consisting of:
- 1,3 diethyl-2-thiourea, present in a concentration ranging from 10% to 80% of the weight of the composition;
- a first amphoteric surfactant selected from the group consisting of:
- a sultaine surfactant, a betaine surfactant, and combinations thereof, present in a concentration ranging from 5% to 75% of the weight of the composition;
- a second amphoteric surfactant, present in a concentration ranging from 5% to 75% of the weight of the composition;
- and
- a solvent, present in a concentration ranging from 10% to 80% of the weight of the composition,
- wherein the composition is a composition.
Dependencies are inferred from the claim text.