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Drilstar HT
Product #10450
Drilstar HT is a premium quality white cornstarch, which provides a rapid reduction of API fluid loss at minimum concentrations.
Drilstar HT provides fluid loss control in all water based mud systems. In particular it finds applications in high hardness, high pH, gypsum muds where bottom hole temperatures are not excessive.
Drilstar HT is effective to temperatures of 120°C. It performs best in an alkaline environment and will not increase the rheological properties of the mud system in which it is used. In the absence of a high pH and/or high salinity a bactericide such as T-352 should be used to prevent bacterial decomposition.
Drilstar HT is used in concentrations ranging from 8.0-25.0 kg/m³ depending somewhat on the amount of drilled solids present in the mud
system. Oxygen scavengers should be used to reduce thermal degradation.
Mixing & Handling
Drilstar HT mixes readily. It may be added through the hopper at rates of 5-10 minutes per sack when required. It is advisable to use a dust mask while it is being mixed.
Physical Properties
Appearance: White granular powder
Bulk Density: 512-560 kg/m³
Chemical Properties
Type: Pre-gelantinized cornstarch
Solubility: Soluble in water
pH: 5.0 - 7.0 (4% solution)
Microtox: 47% @ 8.0 kg/m³
Caution
It has been demonstrated that produced crude oils can contain very persistent bacterial strains that may cause fermentation problems in mud systems with susceptible organic matter such as starch. Much larger treatment doses and/or addition of a secondary biocide may be required when crude oil is added to these drilling fluids.
Packaging & Controls
WHMIS: Not controlled
TDG: Not regulated
Packaging: 50lb sack