Reverse circulation drilling is achieved by blowing air down the drilling rods.
The differential pressure creates an airlift lifting cuttings up the inner tube inside each rod, after which they move through a cyclone and are deposited in a sample bag for analysis on the surface.
Geosearch has significant experience in this field with proven depth records.
Diamond drilling involves a solid core being extracted from a depth for examination on the surface.
Geosearch has vast experience in the exploration of numerous minerals and offers NQ/NQ3, HQ/HQ3, and PQ/PQ3 core sizes.
We operate rigs capable of drilling to depths of 4000m+.
Geosearch offers blast hole drilling services using wheel-mounted and track-mounted drill rigs.
This method removes drill cuttings by injecting compressed air into the drill hole via the annular area between the inner tube and the drill rod.
The cuttings are blown back to the surface up the inner tube, where they pass through the sample separating system and are collected as needed.
Geosearch utilises this method in the Heavy Sands projects in which it is involved.
Mud rotary drilling is most commonly used to create a stable hole in generally unstable ground condition areas.
Geosearch is fully equipped to perform these services at large hole diameters.
Core sample quality is critical, and by drilling large diameter core holes, we can provide a core recovery of 100%.
In addition, we provide 6-metre UWF core barrels to double the production rate.
Percussion drilling uses compressed air to drive a piston-driven hammer.
It delivers a series of impacts to the shank end of a drill rod or attached steel bit in order to achieve penetration.
Geosearch is experienced in water-well drilling and offers quality water-well construction services.
Auger drilling involves the employment of a helical screw driven into the ground with a rotating motion.
The debris is lifted up the borehole by the action of the screw blade.
We offer augur drilling hole sizes ranging from 4 to 25 inches in diameter.