The drag bits is a kind of cutting bit that is commonly used in the upper soft formation of the drilling.

There are 3 blades, 4 blades, 5 blades, 6 blades up to 10 blades, and the most commonly used is the 3 blades drag bit.

The drag bits have PDC drag bits & Tungsten carbide (T.C.) drag bits. And the T.C. drag bits have the shape of chevron type, flat type and step type.

Applicable formation: extremely soft, soft, medium, medium hard.

It is widely used in geological exploration, water well, coalfield, subways and so on.