7 7/8″ SHJ527YT


Size: 7 7/8″ (200.03 mm)
IADC: 527
Bearing and Seal: Journal Bearing / Metal face seal
No. of Rows: 4-4-3
Inner Row: Conical / 65 pcs
Gauge Row: Wedge / 40 pcs
Trimming Row: Wedge / 31 pcs
Bevel Row: Flat / 71 pcs
Pin Connection: 4 1/2 REG
Bit Weight (KG): 34.0
Weight on Bit (KN/mm): 0.35 ~ 1.05
ROP (rpm): 50 ~ 120



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– High-strength and wear-resistant carbide teeth are used, and the number of tooth rows, number of teeth, height of exposed teeth and tooth shape are optimized to improve the efficiency and life of the cutting structure of the drill bit.
– With new journal bearing structure which greatly prolongs the service life of the bearing, and has the ability to withstand high drilling pressure and adapt to high rotational speed.
– SHJ series bit uses journal bearing and metal face seal; it can perform consistently in high speed drilling application.
– 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. T feature, there is a trimming row between the gauge row and bevel row to protect the cones and trim the well wall.