タイトルまたは説明

This kind of TCI bits are used to drill low compressive strength,very soft formation .TCI bits maximize the use of both conical and chisel tungsten carbide inserts of large diameters and high projection .This cutting structure design ,combined with maximum cone offset. results in high bit penetration rates,the deep  intermesh of cutter rows prevents bit bailing in sticky formations.
Suitable  formation :shale ,clay ,sandstone ,conglomerate etc.