7 7/8″ DHV617Y

Specifications

Size: 7 7/8″ (200.03 mm)
IADC: 617
Bearing and Seal: Journal Bearing / Composite seal
No. of Rows: 5-5-4
Inner Row: Conical / 85 pcs
Gauge Row: Ovoid / 44 pcs
Bevel Row: Flat / 44 pcs
Pin Connection: 4 1/2 REG
Bit Weight (KG): 34.0
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.
– Adopting a new type of flat sealed bearing structure, which increases the stability of the sealed structure and greatly prolongs the working life of the bearing.
– 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 and gravel interlayers.