... completion fluids. CaCO3 powder / calcium carbonate (F,M,C)1. Advantages1)Acid-soluble, high-purity product which minimizes ... additive, normal concentrations are in the 10 to 50lb/bbl range (29 to 143 kg/m3). Calcium Carbonate can ... or when drilling depleted zones. Treatments range from 2 to 10 sacks per hour when used a preventative measure. ... Meshes CaCO3 powder calcium carbonate F,M,C