Perlite Drilling Mud / Perlite Ore / เพอร์ไรต์

WHY PERLITE CEMENT?

Well cementing materials such as diatomaceous earth, pozzolan, fly ash and glass beads do not have the lightweight properties exhibited by perlite concrete unless concentra-tions of bentonite or gel, as it is referred to, are added to the cement. A disadvantage of large concentrations of gel is that they are not com-patible with heat. Because perlite cement is not affected by heat and little material is lost in cementing operations due to its ability to bridge voids, perlite cement provides a more effective and less costly well cement. The dry weight of perlite is only 8 lb/ft3 (128 kg/M3) as opposed to 25-100 lb/ft3 (400-1600 kg/M3) - the dry weight of the other materials.

Applications for Perlite
In oilwell cementing perlite is mainly used as an extender for Portland Cement. Perlite reduces the density which enable weak zones to be successfully cemented and isolated. Perlite can be used also as an strength enhancer.

Perlite help control lost circulation thanks to its excellent bridging properties.

Perlite in expanded form is also used as a lightweight agent.The final density of the product is dependent on external pressure and on how many pore spaces remain closed. As the pore spaces collapse and take on water the density of the slurry will increase.

ADVANTAGES OF USING PERLITE WELL CEMENT
Lighter density
Aids in bridging
Heat compatible
Lower costs
Insulating qualities