11″ DHV617GY


Size: 11″ (279.4 mm)
IADC: 617
Bearing and Seal: Journal Bearing / Composite seal
No. of Rows: 5-5-5
Inner Row: Conical / 135pcs
Gauge Row: Ovoid / 64 pcs
Bevel Row: Flat / 64 pcs
Pin Connection: 6 5/8 REG
Bit Weight (KG): 78.0
Weight on Bit (KN/mm): 0.50 ~ 1.05
ROP (rpm): 40 ~ 100



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– Adopt high strength and high wear resistance carbide inserts.
– Adopting the Journal bearing structure, it has the ability to withstand medium WOB and adapt to higher ROP.
– Adopt new flat sealing ring, more suitable for the working environment and the operating parameters of rock bit.
– The oil storage system can balance the pressure difference inside and outside the bearing, and provide good lubrication guarantee for the bearing system.
-Y feature, the main cutting teeth of the cone are conical teeth, which have strong fracture resistance and formation penetration ability, and are suitable for drilling in hard and brittle formations and gravel interlayers.