8 1/2 inch IADC 517 tci tricone bit

Basical Parameter

Bit Size

8 1/2"(215.9MM)

IADC Code

517G

Connection

4 1/2"API reg pin

Nozzle Qty

3NZ

Make up Torque(KN.m)

16.3~21.7

Operating Parameter

Rotary Speed(rpm)

140~60

Weight on Bit(KN/MM)

0.35~1.0

Formation

Soft formation with low compressive strength ,and high drillability ,such as mudstone,gypsum,salt,soft limestone,etc.