Initially created for carbonate lithologies in the Middle East, Shamal tungsten carbide insert (TCI) drill bits elevate application-based drillbit design in a wide range of environments. With a specially designed insert shape, this line of TCI bits delivers maximum insert toughness for carbonate-based drilling operations around the world.
For more information:
http://www.slb.com/services/drilling/drill_bits/type/roller_cone/shamal.aspx