Wellbore fluids including emulsifiers, and related methods
AssigneeSchlumberger Technology Corporation
InventorsDimitri Khramov, Evgeny Barmatov
Life of this patent
Estimating the term…
Abstract
A wellbore fluid includes an oleaginous base fluid, and an emulsifier including a reaction product of an amide and a sultone. The amide may include a bis-amide, an imidazoline-amide, or a mixture including the bis-amide and the imidazoline-amide. The bis-amide may include a reaction product of one or more fatty acids and one or more sultones. The imidazoline-amide may include a condensation product of the bis-amide. Related methods of forming the emulsifier and using the emulsifier in a wellbore fluid while drilling an earth formation are also disclosed.
Claims11
A wellbore fluid, comprising:
- an oleaginous base fluid;
- and
- an emulsifier including a reaction product of:
- a bis-amide and a sultone;
- and
- an imidazoline-amide and the sultone,
- wherein the emulsifier includes a weight ratio of the reaction product of the bis-amide and the sultone to the reaction product of the imidazoline-amide and the sultone within a range of from about 0.1:1.0 to about 1.0:10.0.
A method of drilling a borehole, the method comprising:
- drilling a borehole in an earth formation using a drilling fluid comprising:
- an oleaginous base fluid;
- and
- an emulsifier including a reaction product of:
- a bis-amide and a sultone;
- and
- an imidazoline-amide and the sultone;
- and
- circulating the drilling fluid through the borehole,
- wherein the emulsifier includes a weight ratio of the reaction product of the bis-amide and the sultone to the reaction product of the imidazoline-amide and the sultone within a range of from about 0.1:1.0 to about 1.0:10.0.
Dependencies are inferred from the claim text.