Roller cone bits(Steel tooth bits)

Steel tooth bit with high efficiency
SWT series steel tooth bit with high efficiency can solve these problems ,with strong wear resistant teeth and fast ROP,bit can work more stably, which is more suitable for drilling in soft or middle soft formations with high rotary speed..
The size range of SWT series bit is from 8 1/2 to 17 1/2 inch ,and IADC varies from 117 to 127
.for example:9 1/2 SWT 127.
Bit type HAT127
Applicable formation soft with low compressive strength and high drillabilty,such as soft shale ,clay and salt bed and soft limestone ,etc.
Main characteristics of the bit &Cutting Stracture Hardfaced tooth surface and gage,high compact exposure with gage compacts,and a row of trimmers is added between gage row and heel row and heel row
Normal WOB Kn/mm(bit dia) 0.25~0.90
Rotary Speed（rpm） 180~80