VG-69 Organophilic Clay | SLB


Organophilic clay

Schlumberger Oilfield Services

VG-69 organophilic clay is a viscosifier and gelling agent used in VERSA oil-based and NOVA synthetic-based systems. This amine-treated bentonite is used to increase carrying capacity and suspension properties, providing support for weighting agents and improved cuttings removal. VG-69 viscosifier also aids in filtercake formation and filtration control.

Typical Physical Properties
Physical appearance Off-white to tan powder
Specific gravity 1.57
Bulk density 33 lbm/ft3 [528 kg/m3]


VG-69 viscosifier is proven effective in drilling, coring, workover and completion fluids. The product is also effective in specialty applications such as casing packs, packer fluids and spotting fluids. Good agitation and sufficient shear are required to develop viscosity when using VG-69 viscosifier to build fresh mud.

Typical concentrations range from 2 to 10 lbm/bbl [5.7 to 28.5 kg/m3] for most drilling fluid applications, depending on the base fluid and system requirements. Mineral oils generally require higher concentrations than diesel oils. VG-69 viscosifier will not fully yield by the shear and temperature exposure in a mixing plant or mud pit. Care should be taken not to overtreat with VG-69 viscosifier until the fluid has actually circulated through the well. For system maintenance, VG-69 viscosifier should be added as needed to maintain the flow properties and gel strengths in the desired ranges. Specialty applications such as packer fluids and casing packs typically use concentrations in the 10 to 15 lbm/ bbl [28.5 to 43 kg/m3] range.


  • Provides gel structure and viscosity for the suspension of weight materials
  • Increases viscosity for improved hole-cleaning capacity
  • Improves filter-cake quality and filtration characteristics
  • Effective gelling agent in casing packs and packer fluids

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

VG-69 viscosifier is packaged in 50-lb [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.