Description
It is a modified sodium sulphonated asphaltic compound that stabilizes shale, inhibits dispersion of drilled solids, reduces torque and drag and acts as an alternative to oil usage etc. and aids emulsification.
Application
For shale control, fluid loss control and for lubricity improvement.
COMMON NAME – SODIUM SALT OF SULPHONATED ASPHALT.
Advantages
- It is compatible with all water base mud systems.
- Improves lubricity thereby reducing torque and drag of chilling string.
- Prevents bit and down hole assembly bailing by preferentially oil wetting the drill string.
- Seals small fractures in stressed shale formulation.
- Contributes to corrosion inhibition.
Physical Properties
| Appearance | Free flowing fine blackish grey powder |
| Bulk Density | 850 Kg / m3 |
| Moisture Content (% by weight) | <10 |
| Solubility in water (%) | >70 |
| Solubility in DMS (%) | >30 |
| PH of 2% (w/v in dw) | >8.5 |
| Particle size | >90% through BSS 40 |
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