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


High-temperature filtration control agent

Schlumberger Oilfield Services

ONE-TROL HT filtration control agent is designed for use in all oil- and synthetic-based 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 agent is compatible with other oil-based or synthetic-based additives.

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


ONE-TROL HT agent can be used in any oil- or synthetic-based 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 agent. The concentration may need to be increased for special applications where high temperatures (>350 degF [>176 degC]) are anticipated or where ultralow fluid loss is required. Pilot testing is recommended to determine the required ONE-TROL HT agent treatment level and the effect on properties. ONE-TROL HT fluid-loss control agent is stable to temperatures in excess of 500 degF [260 degC] 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-based and synthetic-based systems
  • Compatible with other additives
  • Disperses easily when added through a hopper


Effectiveness is reduced at temperatures approaching 400 degF [204 degC], 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 safety data sheet.

Packaging and storage

ONE-TROL HT agent is packaged in 50-lbm [22.7-kg] multiwall 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 stacking.