Natural Calcium Carbonate powder is used as an acid-soluble weighting and bridging agent in workover and completion fluids. Depending on customer requirements, we can offer natural calcium carbonate powder in various grades, and a particle size analysis report can be submitted along with supply (Malvern Make Particle size analyzer – U.K.). As a weighting agent, CaCO3 can be used to extend the brine's maximum weights. As a bridging agent, the correct blend of suitable particle diameters can be used effectively for sealing the pores in the production formation, thus minimizing the invasion of fluid. Because the material is derived from marble—a metamorphic and highly crystalline form of Natural Calcium Carbonate—it does not break down in the high shear conditions encountered in drilling. Breakdown of weaker materials derived from other sources leads to increased invasion of the producing formation. After acidification, no material is left behind to impair the permeability of the producing formation when production of oil starts.