MEGAMUL Multipurpose Emulsifier | Schlumberger


Multipurpose emulsifier

MEGAMUL multipurpose emulsifier serves as the basic emulsifier and wetting agent in the MEGADRIL diesel-oil-based system.

Benefits include improved thermal stability and high-pressure, high-temperature (HPHT) filtration control. The product is effective over a wide temperature range and in the presence of contaminants such as water, solids, and cement. MEGAMUL emulsifier effectively reduces the adverse effects of water and drill solids contamination.

Typical Physical Properties  
Typical Physical Properties Physical appearance Dark-amber, viscous liquid
Typical Physical Properties Specific gravity 0.90 – 0.99
Typical Physical Properties Flash point >203 degF [>95 degC] (Pensky–Martens closed-cup test)


Initial system formulations require 4 to 12 lbm/ bbl (11.4 to 34.2 kg/m3), depending on the density, oil:water ratio, and required temperature stability.

MEGAMUL emulsifier requires excess lime to properly function; add 4 to 8 lbm/bbl (11.4 to 23 kg/m3) on initial makeup and maintain an excess of at least 1 lbm/bbl (3 kg/m3).


  • One-drum multipurpose product that is specifically formulated for MEGADRIL drilling fluid system
  • Temperature stable to >450 degF [>230 degC]
  • Improved emulsion stability
  • Maintaining of HPHT filtrate in a water-free state
  • Improved thermal stability, rheological stability, filtration control and contamination resistance of nonaqueous drilling fluids
  • Effectiveness at counteracting the adverse effects of water contamination such as high viscosity, low-emulsion stability, and water-wet solids
  • Compatibility with standard VERSADRIL diesel oil-based drilling fluid systems


  • Environmental restrictions concerning the use of oils and oil-base fluids should be considered since MEGAMUL emulsifier is used in conjunction with oil

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

MEGAMUL emulsifier is packaged in 55-galUS (208-L) drums or 257-galUS [1,000-L] totes. 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.

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