Recycling of oil-based drilling muds

Details Recycling of oil-based drilling muds Recycling of oil-based drilling muds

B - Operations, Transporting

01

D

B01D 17/05 (2006.01) B01D 17/038 (2006.01) E21B 21/06 (2006.01)

Patent

CA 2612348

A method of recovering hydrocarbon or synthetic base oils from used oil-based drilling mud utilizes acid to deactivate emulsifiers in the drilling mud for altering the emulsion stability and permitting removal of the solids contained in the drilling mud using conventional separation such as centrifugation. A surfactant is typically added to prevent water-wetting as a result of the addition of the acid. The recovered base oil contains substantially all of the deactivated emulsifiers, which can be reactivated through the addition of lime, allowing new drilling fluids to be prepared without the need to add significant amounts of emulsifier to the recycled base oil.

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