Lost Circulation



MICA is an all-purpose lost circulation material designed to reduce not only severe lost circulation but also minor seepage losses. It is applicable in both water-based and oil-based drilling fluids. MICA is available in Fine, Medium and Coarse grades.


Appearance Grey Powder
Specific Gravity 2.6 - 2.9g/cm3
Bulk Density 1746 kg/m3
Solubility Insoluble in water


  • MICA FINE may be added directly to the drilling fluid as a precautionary measure in stopping lost circulation since the small particles pass through the shaker screen and are thus retained in the system.
  • MICA MEDIUM AND COARSE is used to control mild circulation losses and is in combination with other bridging agents, usually applied in form of a lost circulation plug.


  • MICA FINE is added to the drilling fluid in amounts of (3.5 - 7.0 lbs. /bbl.) prior to entering a thief zone.
  • MICA MEDIUM AND COURSE is usually in combination with fibrous materials, used to make up a Lost Circulation slug. The amounts to be added are only limited by the desired viscosity of the slug.


MICA (F-M-C) is available in 25 kg multi-ply paper sacks, palletized as 40 sacks per pallet.

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