Reverse Circulation Drilling
RC drilling is achieved by blowing air down the rods, the differential pressure creates air lift of the cuttings up the inner tube, which is inside each rod. It reaches the top of the hole, and then moves through a sample hose which is attached to the top of the cyclone. The drill cuttings travel around the inside of the cyclone until they fall through an opening at the bottom and are collected in a sample bag. Agua Terra Lda has immense experience in RC drilling, proving to drill record meters.
DD consists of solid core being extracted from a depth for examination on the surface. Agua Terra Lda has vast experience in the exploration of numerous minerals and offer NQ/NQ3, HQ/HQ3, PQ/PQ3 sizes.
Blast Hole Drilling
Agua Terra Lda offers services for blast hole drilling, using wheel mounted and track mounted drill rigs.
The drill cuttings are removed by injection of compressed air into the hole via the annular area between the inner tube and the drill rod. The cuttings are then blown back to surface up the inner tube where they pass through the sample separating system and are collected as needed. Agua Terra Lda utilises this method in the Heavy Sands projects.
Mud Rotary Drilling
Mud rotary drilling can be described as a form of drilling most commonly used to create a stable hole in bad ground condition areas. Agua Terra Lda is fully equipped to perform these services at large diameters.
Large Diameter Drilling
Core sample quality is critical and by drilling large diameter core holes, we are able to provide a core recovery of 100%. We provide 6 m UWF core barrels to double the production rate.
Using compressed air to drive a piston-driven hammer that delivers a series of impacts to the shank end of a drill rod or attached steel bit. Agua Terra Lda has great amount of experience in percussion drilling.
Water Well Drilling
Agua Terra Lda is experienced in water well drilling and offers quality water well construction services.
Auger drilling is done with a helical screw which is driven into the ground with rotation; the earth is lifted up the borehole by the blade of the screw. We can offer 4”–25” sizes.