The mud rotary drilling method is a gentle and mud-balanced drilling technique to collect the best quality sample or least disturbed / highest quality in-situ test (SPT, thin-walled-tube, Vane Shear, PMT, etc.).
Features
Open hole or casing advanced systems
Weighted drilling mud stress balances the borehole
Low bit pressure and gentle drilling technique does not disturb soils in front of the bit
Mud circulation brings cuttings to a surface mud cleaning system
Safety rotation cages and other safety features
Cold weather systems
Mud cleaning and heating systems
High pressure mud pumps for deep drilling applications
Multi-purpose rigs capable of a variety of drilling techniques
CPT capable rigs
Advantages
High quality undisturbed sampling (hydraulic or mechanical fixed piston thin walled tube samples)
High quality SPT testing, with a calibrated SPT hammer (SPT energy testing)
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