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US 2017/0283680 A1Published application
Emulsifiers for invert emulsion wellbore fluids and methods of use thereof
AssigneeM-I L.L.C.
InventorsYiyan Chen, Dimitri Khramov
Life of this patent
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Abstract
A wellbore fluid may include an oleaginous external phase, a non-oleaginous internal phase and a reaction product of a capping agent with a base emulfisifer, the base emulsifier being a reaction product of a fatty acid and a hydrophilic compound having at least two reactive hydrophilic functional groups, the capping agent being selected from the group consisting of a polycarboxylic acid, anhydride, urea, isocyanate, alpha-halocarboxylic acid, oxirane, cyclic diester, and cyclic sulfonate ester.
Claims22
A wellbore fluid, comprising:
- an oleaginous external phase;
- a non-oleaginous internal phase;
- and
- a reaction product of a capping agent with a base emulfisifer, the base emulsifier being a reaction product of a fatty acid and a hydrophilic compound having at least two reactive hydrophilic functional groups, the capping agent being selected from the group consisting of a polycarboxylic acid, anhydride, urea, isocyanate, alpha-halocarboxylic acid, oxirane, cyclic diester, and cyclic sulfonate ester.
1 more element
A method, comprising:
- injecting into a wellbore, a wellbore fluid comprising:
- an oleaginous external phase;
- a non-oleaginous internal phase;
- and
- a reaction product of a capping agent with a base emulfisifer, the base emulsifier being a reaction product of a fatty acid and a hydrophilic compound having at least two reactive hydrophilic functional groups, the capping agent being selected from the group consisting of a polycarboxylic acid, anhydride, urea, isocyanate, alpha-halocarboxylic acid, oxirane, cyclic diester, and cyclic sulfonate ester.
2 more elements
A wellbore fluid, comprising:
- an oleaginous external phase;
- a non-oleaginous internal phase;
- and
- a reaction product of a fatty acid and a hydrophilic compound having at least two reactive hydrophilic functional groups, the fatty acid and the hydrophilic compound being present at a molar ratio of at least 2:1.
1 more element
Dependencies are inferred from the claim text.