Hanlinsky Tungsten carbide core bits is suitable to mudstone, shale, backfill stratum formation and clay, especially for soft formations, the complicated formations which need mud to protect borehole wall and formations in which the bit easily gets adhered by debris. 

Characteristics
This bit uses eight-square, special exploration T. C., arranged by steps. Helical strengthening bars are used along steel body for protection, prolonging both steel body life and bit life. 

The helix direction is right, and during drilling into the soft formation in which there is pretty much rock powder, the mud brings out rock powder along the helical gutter. The gutter has a function of discharging debris in single direction, which obviously improves the debris discharging, raises drilling speed and prolongs bit life. 

T. C. Core bit uses seismic grade tungsten-carbide as the cutting media. Tungsten-carbide does not possess the hardness of diamond and as such has a limited as a core drilling cutting media. Tungsten-carbide bits are however a very cost effective means of drilling softer unconsolidated formations.