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US 6,984,610 B2Granted
Acid based micro-emulsions of surfactants and solvents
AssigneeIntegrity Industries, Inc.
InventorsJames R. VonKrosigk, William M. Duncan
Life of this patent
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Abstract
Acid based micro-emulsions are disclosed comprising water, an acid blend, an anionic surfactant, a nonionic surfactant, a co-solvent, a solvent and an oxidizer. The micro-emulsions have particular utility in cleaning oil sludges and drilling mud residues from well cuttings, well formations and down hole and surface oil well drilling and production equipment.
Claims20
A chemical composition comprising an emulsified admixture of:
- from about 10 to about 70 weight percent water;
- from about 1 to about 60 weight percent acid blend, the acid blend including at least one mineral acid and at least one organic acid;
- from about 1 to about 40 weight percent surfactant, the surfactant comprising a blend of a nonionic surfactant and an anionic surfactant;
- and
- from about 0.5 to about 40 weight percent solvent.
2 more elements
A chemical composition comprising an emulsified admixture of:
- from about 10 to about 70 weight percent water;
- from about 1 to about 60 weight percent acid blend, the acid blend including at least one mineral acid and at least one organic acid;
- from about 1 to about 25 weight percent nonionic surfactant;
- from about 1 to about 25 weight percent anionic surfactant;
- from about 0.5 to about 40 weight percent solvent;
- and
- from about 1 to about 25 weight percent co-solvent.
4 more elements
A method for preparing a micro-emulsified well cleaning composition, the method comprising:
- admixing, with continuous mixing, from about 10 to about 70 weight percent water, from about 1 to about 60 weight percent acid blend including at least one mineral acid and at least one organic acid, from about 1 to about 25 weight percent nonionic surfactant, from about 1 to about 25 weight percent anionic surfactant, and from about 1 to about 25 weight percent co-solvent to provide a first intermediate mixture;
- and
- adding to said first intermediate mixture, with continuous mixing, from about 0.5 to about 40 weight percent solvent and from about 0.05 to about 1 weight percent oxidizer, based on the final weight of said emulsion, and
- continuing mixing until said composition comprises a micro-emulsion.
1 more element
Dependencies are inferred from the claim text.