VG-SUPREME Organophilic Clay Viscosifier | Schlumberger

VG-SUPREME

Organophilic clay viscosifier

VG-SUPREME viscosifier is a high-performance rheological additive for invert-emulsion and all-oil drilling fluids.

It provides excellent antisag features and exhibits a very rapid yield under low-shear and low-temperature conditions. VG-SUPREME viscosifier is ideal for minimizing barite sag in extended-reach wells and for preventing settling in low-shear mud plant operations.

Typical Physical Properties  
Physical appearance Very-light cream powder
Specific gravity 1.7
Moisture (maximum) 3.0%

Applications

VG-SUPREME viscosifier is a specially formulated organophilic clay, capable of developing outstanding low-shear-rate viscosity and suspension properties. It can be used as the primary or supplemental viscosifier, depending on the specific drilling conditions. VG-SUPREME viscosifier can be used in virtually any base oil or synthetic fluid, as well as all-oil drilling fluids.

VG-SUPREME viscosifier is an effective replacement for gelling agents in both mud plant and onsite well applications, where rapid yield is essential to prevent static or dynamic settling. Unlike some other organophilic clays, VG-SUPREME viscosifier will develop the maximum rheological properties shortly after being mixed with minimal shear. This eliminates situations where rheology would increase for several circulations after the organoclay addition. Laboratory tests show that VG-SUPREME viscosifier generates the same or equal rheology more rapidly than standard organophilic clays.

When used for preventing barite sag and improving hole cleaning, VG-SUPREME viscosifier treatments should range between 0.1–1.0 lbm/bbl. A concentration of 1.0- to 3.0-lbm/bbl VG-SUPREME viscosifier can be used at the mixing plant for initial mixing, or as a supplement to 1.0- to 5.0-lbm/bbl standard organoclays.

VG-SUPREME viscosifier is an ideal additive for dilution premixes used to reduce the mud weight or to decrease the low-gravity solids concentration. For normal maintenance, concentrations of 1.0–3.0 lbm/bbl can be used when maintaining rheology or 3.0–10.0 lbm/bbl when increasing the rheology by premix additions.

Advantages

  • Highly efficient in developing low-shear-rate viscosity
  • Excellent anti-sag capabilities
  • Enhances hole-cleaning capacity
  • Rapid yielding
  • Very effective in low-shear and low-temperature mixing conditions

Limitations

  • Excessive treatment with VG-SUPREME viscosifier tends to increase mud rheology at cold temperatures. In deepwater applications, the rheology should be measured at two or three temperatures, including the flow line temperature.

Toxicity and Handling

Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions as described in the safety data sheet.

Packaging and Storage

VG-SUPREME viscosifier is packed in 50-lbm [22.7-kg] multiwall paper sacks. Store in a dry, well-ventilated area. Keep container closed. Store away from incompatibles. Follow safe warehousing practices regarding palletizing, banding, shrink-wrapping, and stacking.

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