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US 8,163,676 B2Granted
Emulsifier blend
AssigneeM-I L.L.C.
InventorsEugene Dakin, Hui Zhang, Bethicia B. Prasek
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Abstract
An oil-in-water emulsion that includes a brine continuous phase; and an oleaginous discontinuous phase stabilized by an emulsifier blend, the emulsifier blend comprising: an emulsifier having an HLB greater than 11; and an amphoteric chemotrope is disclosed. Emulsifier blends comprising an emulsifier having an HLB greater than 11 and an amphoteric chemotrope and methods of using emulsifier blends are also disclosed.
Claims20
An oil-in-water emulsion, comprising:
- a brine continuous phase;
- and
- an oleaginous discontinuous phase stabilized by an emulsifier blend, the emulsifier blend comprising:
- an emulsifier having a hydrophilic-lipophilic balance greater than 11;
- and
- an amphoteric chemotrope.
3 more elements
An emulsifier blend, comprising:
- an emulsifier having a hydrophilic-lipophilic balance greater than 11;
- and
- an amphoteric chemotrope.
A method of performing a downhole operation, comprising:
- pumping a wellbore fluid comprising an emulsifier blend into a wellbore, the emulsifier blend comprising:
- an emulsifier having a hydrophilic-lipophilic balance greater than 11;
- and
- an amphoteric chemotrope.
1 more element
Dependencies are inferred from the claim text.