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US 12,435,256 B1Granted
Combination clay stabilizer having an alkali metal asphalt sulfonate and quaternary ammonium salt
AssigneeChevron Phillips Chemical Company LP
InventorsMarshall D. Bishop, Elan Watson, Katrina I. Schultz
Life of this patent
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Abstract
Clay-containing soils and shale are treated with a combination clay stabilizer having an alkali metal asphalt sulfonate in combination with a quaternary ammonium salt to reduce swelling of the clay component of the soil and shale.
Claims18
A combination clay stabilizer comprising:
- an alkali metal asphalt sulfonate;
- and
- a quaternary ammonium salt, wherein the quaternary ammonium salt is a choline salt.
Dependencies are inferred from the claim text.