7 7/8″ SHV417GXT

Specifications

Size: 7 7/8″ (200.03 mm)
IADC: 417
Bearing and Seal: Journal Bearing / Composite seal
No. of Rows: 4-3-3
Inner Row: Wedge / 52 pcs
Gauge Row: Wedge / 31 pcs
Trimming Row: Wedge / 19 pcs
Bevel Row: Flat / 50 pcs
Pin Connection: 4 1/2 REG
Bit Weight (KG): 34.0
Weight on Bit (KN/mm): 0.35 ~ 0.90
ROP (rpm): 70 ~ 140

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– 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.
– X feature, the main cutting teeth of the cone are wedge-shaped teeth, which have the characteristics of high cutting efficiency and strong anti-breaking ability for specific medium-soft to medium-hard formations, effectively improving the drilling speed of the drill bit and prolonging the service life of the drill bit.
– T feature, there is a trimming row between the gauge row and bevel row to protect the cones and trim the well wall.