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US 2019/0055446 A1Published application
Thermally stable surfactants for oil based drilling fluids
AssigneesSaudi Arabian Oil Company, Durham University
InventorsMona Al Batal, Andrew Whiting, Hugh Christopher Greenwell, John Adrian Hall, Gasan Selman Alabedi
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Abstract
Embodiments are directed to a surfactant of formula (I) and incorporation of one or more surfactants into drilling fluids. The surfactant having the following structure:
Claims9
A surfactant of formula (I):
- where
- R1a is a —H, alkyl, or aryl;
- x is an integer from 21 to 453;
- R2 is alkyl or aryl.
1 more element
An oil-based drilling fluid comprising:
- an oil phase;
- an aqueous phase;
- at least one surfactant of formula (III):
- where:
- R3 is (C2-C500)alkyl or aryl;
- and
- R4a is (C4-C500)alkyl or (C4-C500)heterohydrocarbyl.
4 more elements
A surfactant according to formula (IV):
- where:
- R3 is (C2-C500)alkyl or aryl;
- and
- R4 is (C4-C500)alkylene, arylene, or combinations thereof.
1 more element
Dependencies are inferred from the claim text.