it is a high purity ground marble.it is used as a bridging and weighting agent in drilling, work over and completion fluids.

CaCO3 powder / calcium carbonate (F,M,C)

1. Advantages1)Acid-soluble, high-purity product which minimizes formation damage.2) High hardness, Calcium Carbonate resists particle-size degradation.3) Essential inert, minimum effect on fluid properties.

4) It is preferred over limestone because it is generally more pure with a higher hardness and it provides better acid solubility.

2. ApplicationCalcium Carbonate is an acid soluble additive used for bridging and weighting agent for a controlling fluid loss and density. As a bridging agent and fluid loss-additive, normal concentrations are in the 10 to 50lb/bbl range (29 to 143 kg/m3).

Calcium Carbonate can also be added on a periodic basis for seepage control to limit losses (lost circulation and leak-off) to high permeability formations.It is particularly effective when drilling with high differential pressures caused by an overbalanced condition or when drilling depleted zones. Treatments range from 2 to 10 sacks per hour when used a preventative measure.

For depleted zone drilling or induced fracture applications, Calcium Carbonate is most effective when used in combination with Graphite additive.

3. Specification

Item	specification
Purity	80-85%
Physical Appearance	White Powder
Specific Gravity	2.7 Min
Solubility in 15% HCL	98% Min
Grade	Size Range (BSS mesh)
Coarse	30-80 Mesh
Fine	300 Meshes
Medium	150 Meshes

CaCO3 powder calcium carbonate F,M,C