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US 5,723,423 AGranted
Solvent soaps and methods employing same
AssigneeUnion Oil Company of California, dba UNOCAL
InventorDonald C. Van Slyke
Life of this patent
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Abstract
Compositions comprising (a) a surfactant and (b) a diluent oil are employed in oil-based drilling fluids and processes for cleaning oil-contaminated substrates (e.g., oil-contaminated animals, drill cuttings) as well as in processes for cementing well casings, enhanced oil recovery, and lifting oil from wellbores.
Claims38
A composition comprising:
- (a) at least two different types of surfactants, where each type of surfactant has a HLB value of at least 8 and a mixture of the surfactants would have a HLB value of at least 11;
- (b) at least one diluent oil;
- and
- (c) less than about 5 volume percent water (the volume percent being based on the total amount of surfactant, diluent oil, and water present in the composition),
- where the composition is a solution.
2 more elements
Dependencies are inferred from the claim text.