Versatile emulsifier package

Schlumberger Oilfield Services

VERSAMUL package package is used as the basic emulsifier for the VERSADRIL and VERSACLEAN drilling fluid systems. VERSAMUL package provides excellent emulsion stability, secondary wetting, viscosity, filtration control, and temperature stability.

Typical Physical Properties  
Typical Physical Properties Physical appearance Dark-amber, viscous liquid
Typical Physical Properties Specific gravity 0.84-0.96
Typical Physical Properties Flash point 197 degF [91.7 degC] (Penskey–Martens closed-cup test)


VERSAMUL package forms the basic brine-in-oil emulsion required for the VERSADRIL and VERSACLEAN systems. Initial system formulations require 4 to 10 lbm/bbl [11.4 to 28.5 kg/m3], depending on the properties desired and other components in the system. Daily treatments of VERSAMUL package enhance the emulsion characteristics of these systems. Daily treatments are usually in the 0.05 to 2 lbm/bbl [0.14 to 5.7 kg/m3] range. VERSAMUL package treatments lower fluid loss and increase viscosity.

VERSAMUL package is activated by calcium and performs best at higher levels (>3 lbm/bbl or >8.6 kg/m3) of excess lime. Generally, 1 lbm/bbl [2.85 kg/m3] lime should be added to initial formulations for every 1 lbm/bbl [2.85 kg/m3] VERSAMUL package.


  • Is a multipurpose product that can be used in a wide variety of nonaqueous drilling fluid 
  • Improves emulsion stability
  • Functions as a secondary wetting agent
  • Provides viscosity
  • Provides filtration control
  • Helps maintain high-temperature, high-pressure filtrate in a water-free state
  • Improves the thermal stability and contamination-resistance of an oil mud

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).

Avoid exposure. VERSAMUL package contains mineral oil, which is an irritant to eyes, skin, and the respiratory system.

Packaging and storage

VERSAMUL package is packaged in 55-galUS (208-L) drums. 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.