7 7/8″ SHV537GKT

Specifications

Size: 7 7/8″ (200.03 mm)
IADC: 537
Bearing and Seal: Journal Bearing / Composite seal
No. of Rows: 4-4-3
Inner Row: Chisel / 63 pcs
Gauge Row: Wedge / 36 pcs
Trimming Row: Wedge / 29 pcs
Bevel Row: Flat / 46 pcs
Pin Connection: 4 1/2 REG
Bit Weight (KG): 34.0
Weight on Bit (KN/mm): 0.35 ~ 1.05
ROP (rpm): 40 ~ 110

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– High-strength and high-wear-resistance carbide insert are used to improve the strength and wear-resistance of the insert.
– The new journal bearing structure is adopted, which greatly prolongs the working life of the bearing, and has the ability to withstand moderate drilling pressure and adapt to high speed.
– The performance of the new fluorinated composite sealing ring is improved, and it is more suitable for the working environment and use parameters of the roller cone bit.
– The new sealing structure matches the bearing, thus greatly improving the service life of the drill bit.
– T feature, a protection carbide inserts row is added between the outer rows and cone back rows for the purpose of cone protection and well wall dressing.
– K feature, the inner row adopts wide-topped spoon insert, which increases the cutting width of the insert and improves the drilling efficiency.