17 1/2″ SGA535XTC


Size: 17 1/2″ (444.5 mm)
IADC: 535
Bearing and Seal: Roller Bearing / O-Ring rubber seal
No. of Rows: 6-5-5
Inner Row: Wedge / 203 pcs
Gauge Row: Wedge / 64 pcs
Trimming Row: Wedge / 22 pcs
Bevel Row: Flat / 73 pcs
Pin Connection: 7 5/8 REG
Bit Weight (KG): 223.0
Weight on Bit (KN/mm): 0.35 ~ 0.80
ROP (rpm): 80 ~ 180



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– The new roller bearing structure is adopted, which prolongs the working life of the bearing, and has the ability to withstand medium bit pressure and adapt to higher speed.
– The O-ring seal is made of wear-resistant and high-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.
– 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.