9 7/8″ DHA617GY


Size: 9 7/8″ (250.83 mm)
IADC: 617
Bearing and Seal: Journal Bearing / O-Ring Rubber seal
No. of Rows: 5-5-4
Inner Row: Conical / 108 pcs
Gauge Row: Ovoid / 56 pcs
Bevel Row: Flat / 75 pcs
Pin Connection: 6 5/8 REG
Bit Weight (KG): 62.0
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.
– The O-ring seal is made of wear-resistant andhigh-temperature-resistant fluorinated high-saturated nitrile rubber, which effectively improves the reliability of the bearing seal and thus increases the service life of the drill 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 penetrationability, and are suitable for drilling in hard and brittle formations andgravel interlayers.