Dual Rotary Casing Advance
Over the years, the dual rotary method has proven very effective for advancing steel casing in difficult unconsolidated overburden.
In addition to the primary benefit of effective penetration, the rotation of the casing results in very straight holes and casing can be easily extracted using the lower drive, which is useful in well abandonment applications and for exposing well screens.
Dual Rotary Strengths:
- Casing advancement holds hole open
- Minimal mixing/ cross contamination
- Reduces lost circulation
- Faster penetration rates
- Can modify drilling method after advancing casing
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