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Cap 21
Inhibitor/Filtrate Control/Viscosifier
DESCRIPTION
CAP 21 is a partially hydrolysed tri-polymer which has similar properties to PAC and Trol-polymers. It is an excellent inhibitor of clay and shale's on its own, but more importantly, it mixes with bentonite to form a tough thin filter cake on the sidewalk of the borehole. This protects highly water sensitive sandy friable formations and aids in full core recovery.
APPLICATIONS/FUNCTIONS
- Stabilise water sensitive formations
- Prevents water seepage into the formation
- Holds up sandy formations
- Prevents friable water sensitive core being washed away
ADVANTAGES
- Easy to mix as it is a liquid
- Very high viscosity
- Can replace PAC and Trol-polymers
- Less expensive and less wastage than other polymers
TYPICAL PROPERTIES
- Appearance ; Milky white
- Flash point ; 93 °C
- Specific gravity ;1.05 g/cm3
RECOMMENDED TREATMENT
- Normal use ; 2 Lt to 4 Lt/1000 litres
- With bentonite ; Bentonite 10 to 20kg per 1000 litres
CAP 21 1 to 2ltr per 1000 litres
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