There are several different types of roller bits to suit different drilling application. The bits are sub divided into different categories depending on soil condition. There are three main categories: soft, medium and hard formation bits. Soft formation rock bits are used in unconsolidated sands, clays, soft lime stones, red beds and shale. Medium formation bits are used in calcites, dolomites, lime stones, and hard shale, while hard formation bits are used in hard shale, calcites, mudstones, cherty lime stones and hard and abrasive formations.
The cutting structure of the bits varies according to the rock formation. Soft bits will have longer protruding teeth or chisel-shaped buttons, and fewer, more widely arranged teeth. Medium formation bits will have much closer teeth than soft formation bits, and the protrusion of the teeth is reduced.
Our Core barrel are manufactured with roller bits to suit drilling into hard rock strata.
The teeth are very short and closely arranged on hard formation bits. Because of the shorter teeth the penetration of the rock bit during drilling is less than with soft or medium formation bits, but the other bits cannot be used in hard strata. .
You may have your own workshop and welding facilities and wanted to just purchase the roller bits to suit your own core barrels. or better still let our engineers know the type of rock strata (MPa) strength of rock you wish to core and we will build the core barrel with roller bits to suit your application.
Cesco Deep Foundation Equipment
38 Goodman Place MURARRIE, QLD 4172 AU
Cesco Equipment Pty Ltd .
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Cesco Australia Ltd
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