Drilling Methods

RAB

This is an older exploration drilling method. Sample quality is less accurate than Air Core due to the usage of a single tube.

Air Core

In 1987 we purchased our first Air Core system. From the first job we had major problems with drilling clays and found we couldn’t drill more than 200mm without the bit and inner tubes blocking up.

Slimline RC

We have designed and developed a new small diameter RC Hammer to drill into basement formations.

Zero Impact

Zero Impact Drilling can best be described as the mobilisation to and completion of a drilling program whilst causing no noticeable and lasting side effects or damage to the immediate environment.

METHOD	HOLESIZE	DEPTH	RIG AIR	COMMENTS
RAB	98mm – 102mm	120 m	600CFM / 250PSI	Will drill weathered horizon, ground conditions allowing, to 120 meters.
Aircore	85mm – 87mm	120 m	600CFM / 250PSI	Will drill weathered horizon to 120 meters (including paleo channel)
Aircore (Hammer)	85mm – 87mm	120 m	600CFM / 600PSI (Boosted)	Will drill weathered horizon to 120 meters including paleo channel, but faster in difficult drilling.
Slim Line RC / Light RC	95mm – 97mm Face Sampling RC Hammers	150 m	≤900CFM / 750PSI (Boosted Aux Comp)	Will drill dry holes to 100 meters as fast as 4” RC, and “Wet” holes to approximately 80 meters
Medium RC	127mm -143mm	300 m	1800CFM / 700PSI	Will drill hard formation to 300m, depending on total CFM used and water table.