CALCIUM CARBONATE
General Description
Calcium Carbonate is a high purity ground marble. It is used as a bridging and weighting agent in drilling,work over and completion fluids. It is preferred over limestone because it is generally more pure with a higher hardness and it provides better acid solubility.
Application
Calcium 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.
Advantages
Acid-soluble,high-purity product which minimizes formation damage
High hardness, Calcium Carbonate resists particle-size degradation
Essential inert,minimum effect on fluid properties
Specification
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 |
Packaging & Storage
Calcium Carbonate is packed in 25,50,and 1000 Kgs HDPE sacks with polyliner
heavy/light Calcium Carbonate