MEGADRIL: The one-drum solution to elevated gel strengths in invert systems
Most oil-base systems are reliably and thermally stable, but many typically exhibit elevated, and sometimes severe, progressive gel strengths as drilling progresses. Recognizing the elevated gel-strength trend as problematic in some oil-base-fluid applications, M-I SWACO* Research and Development has developed the MEGADRIL system. This new drilling fluid system delivers the durable and temperature-stable invert-emulsion fluid operators want, without the associated elevated gel strengths. In addition, this fluid withstands high solids loading, lower HTHP fluid-loss values and delivers a high tolerance to seawater and cement contamination.
To simplify mixing and reduce inventory on location, the MEGADRIL system utilizes a single-drum formula that contains the emulsifier, wetting agents and coating agents.
How it works
Through its unique combination of chemistries, the MEGADRIL system produces an improved relationship among the 6-RPM reading, gel strength and yield point. The result is a system that controls filtration without increasing overall viscosity and that has a higher tolerance for drill solids which can cause progressive gel strengths. This allows for reduced pump pressures and increased hole cleaning capabilities while retaining manageable ECD values. 
Features
- Single-drum emulsifier/ wetting agent
- Reduced rheological properties result in lower pump pressure and ECD values
- Excellent drill-solids, temperature and contamination tolerance
- Lower HTHP fluid loss
- Capable of withstanding higher water content, especially in the lower mud densities
Benefits
- Simplified logistics
- Reduced disposal costs
- Decreased ECD for better hole cleaning
- Optimized drilling efficiency
- Lower pump pressures
- Increased hole cleaning
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