ONE-TROL HT High-Temperature Filtration Control Agent | Schlumberger


High-temperature filtration control agent

ONE-TROL† HT amine-treated tannin is a filtration-control additive designed for use in all oil and synthetic-base drilling fluid systems.

The product may be used in combination with other filtration-control additives or as an effective alternative to asphalt and gilsonite where their use is undesirable. ONE-TROL HT additive is compatible with other oil-base or synthetic-base additives.

Typical Physical Properties 
Typical Physical Properties Specific gravity   1.3
Typical Physical Properties Physical appearance   Dark brown powder
Typical Physical Properties Odor   Tannin
Typical Physical Properties Solubility in water   Slightly
Typical Physical Properties pH   4.75 (5% slurry)


ONE-TROL HT additive can be used in any oil- or synthetic-base drilling fluid system to control fluid loss. For most applications, recommended concentrations are 4 to 10 lb/bbl (11.4 to 28.5 kg/m3) of ONE-TROL HT additive. The concentration may need to be increased for special applications where high temperatures (>350 °F/>176 °C) are anticipated or where ultra-low fluid loss is required. Pilot testing is recommended to determine the required ONE-TROL HT additive treatment level and the effect on properties. ONE-TROL HT fluid-loss control agent is stable to temperatures in excess of 500 °F (260 °C) with minimal effect on the rheological properties of the mud.


  • Effective filtration control alternative to asphalt, gilsonite and amine treated lignite products
  • Applicable to all oil-base and synthetic-base systems
  • Compatible with other additives
  • Disperses easily when added through a hopper


Effectiveness is reduced at temperatures approaching 400 °F (204 °C) requiring higher concentrations.

Toxicity and Handling

Bioassay information is available upon request.

Handle as an industrial chemical, wearing protective equipment and observing the precautions described in the Material Safety Data Sheet (MSDS).

Packaging and Storage

ONE-TROL HT additive is packaged in 50-lb (22.7-kg) multi-wall paper sacks.

Store in a dry, well-ventilated area. Keep container closed. Keep away from heat, sparks and flames. Store away from incompatibles. Follow safe warehousing practices regarding palletizing, banding, shrink-wrapping and/or stacking.

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