DRILLING FLUIDS

 

 

 

 

CETCO has consistently provided the drilling industry with the highest quality drilling fluids that keep operators running at peak efficiency. All CETCO bentonite based drilling fluids are made from the highest quality sodium bentonite from Wyoming.

 

When drilling with bentonite, drill cuttings are extracted and form what is called a “filter cake” in the excavation, reducing the level of soil permeability. The bentonite mixture exerts hydraulic pressure preventing any collapse of the walls even when the excavation is below the water table. Bentonite slurry also acts as a lubricant for drilling tools.

 

In slurry wall construction, bentonite is used to contain contaminated groundwater, dewater excavations and stabilize dams, levees, and other similar structures. Bentonite slurry has a slightly higher specific gravity than water, creating a positive hydrostatic head that stabilizes the sides of the trench to hold soil particles together and prevent collapse. The backfill material, some of which may contain soil, bentonite and cement, provides an impervious barrier and over time will set to final form.

 

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