12 1/4″ SHA517GKT


Size: 12 1/4″ (311.15 mm)
IADC: 517
Bearing and Seal: Journal Bearing / O-Ring rubber seal
No. of Rows: 4-4-4
Inner Row: Chisel / 90 pcs
Gauge Row: Wedge / 49 pcs
Trimming Row: Wedge / 27 pcs
Bevel Row: Flat / 49 pcs
Pin Connection: 6 5/8 REG
Bit Weight (KG): 98.0
Weight on Bit (KN/mm): 0.35 ~ 1.05
ROP (rpm): 50 ~ 120



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– Adopt high strength and high wear resistance carbide inserts.
– New journal bearing structure greatly prolongs the working life of the bearing, and has the ability to withstand medium bit pressure and adapt to high speed.
– The improved performance of the new fluorinated rubber seal ring makes it more suitable for the working environment and service parameters of drill bits – Adopt new sealing structure to match the bearing structure, which greatly improves the service life of drill bit – T feature, between the outer rows and cone back rows inserted a protection row carbide inserts.
– K feature, the inner row adopts wide-topped spoon insert, which increases the cutting width of the insert and improves the drilling efficiency.