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US 5,294,353 AGranted
Methods of preparing and using stable oil external-aqueous internal emulsions
AssigneeHalliburton Company
InventorWalter R. Dill
Life of this patent
Estimating the term…
Abstract
Methods of preparing and using stable oil external-aqueous internal emulsions in subterranean formation acidizing, diverting and other treatments are provided. The emulsions can be prepared by batch or continuous mixing by combining the aqueous liquid having a particulated silica compound slurried therein with the oil having a surface active agent which promotes the formation of the emulsion mixed therewith.
Claims20
A method of preparing a stable oil external-aqueous internal emulsion comprising the steps of:
- (a) mixing a particulated silica compound selected from the group consisting of hydrated silica and sodium silica aluminate having a particle size in the range of from about 5 microns to about 500 microns and having at least about 16% of the total particles of a size less than 20 microns with an aqueous liquid to form an aqueous slurry;
- (b) mixing oil with a surface active agent which promotes the formation of an oil external-aqueous internal emulsion;
- and
- (c) combining said aqueous slurry and said oil-surface active agent mixture to form said oil external-aqueous internal emulsion.
1 more element
A method of treating a subterranean formation penetrated by a well bore comprising the steps of:
- (a) mixing a particulated silica compound having a particle size in the range of from about 5 microns to about 500 microns and having at least about 16% of the total particles of a size less than 20 microns with an aqueous liquid to form an aqueous slurry;
- (b) mixing oil with a surface active agent which promotes the formation of an oil external-aqueous internal emulsion;
- (c) combining said aqueous slurry and said oil-surface active agent mixture to form said oil external-aqueous internal emulsion;
- and
- (d) introducing said oil external-aqueous internal emulsion into said formation by way of said well bore.
2 more elements
Dependencies are inferred from the claim text.