IADC Code

Applicable formation

Main characteristics of the bit

Recommended parameters 

Cutting structure

Normal WOB

KN/mm(bit dia.)

Rotary Speed(rpm)

127

Very soft with low compressive strength and high drillability.such as shale,clay,salt bed and soft limestone,etc.

Hardfaced tooth surface and gage,high compact exposure,with gage compacts,

and a row of trimmers is added between gage row and heel row.

0.35~1.05