REVERSE CIRCULATION DRILLING

RC drilling is similar to air core drilling, in that the drill cuttings are returned to surface inside the rods. The drilling mechanism is a pneumatic reciprocating piston known as a hammer driving a tungsten-steel drill bit. RC drilling utilizes much larger rigs and machinery and depths of up to 500 meters are routinely achieved. RC drilling ideally produces dry rock chips, as large air compressors dry the rock out ahead of the advancing drill bit. RC drilling is slower and costlier but achieves better penetration than RAB or air core drilling
This is the original RC with a conventional Down Hole Hammer and an “Interchange” (adaptor just above the hammer with a vertical slot to let the sample into the center of the Dual wall drill pipe. The advantage of the Center Sample Hammer is the sample goes immediatelly into the drill pipe without having to travel up the side of the conventional hammer and into the interchange (aprox 4 feet).
Inyati Drilling and Mining utilizes the Center sample system on all of our mineral exploration programs. (in the 4″ – 6″ sizes) The center sample hammer is available up to a 24″ hole Diameter. Reverse circulation drilling is a method for obtaining chip samples of mineral occurrences
REVERSE CIRCULATION DRILLING

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