12 1/4″ WHA117GT


Size: 12 1/4″ (311.15 mm)
IADC: 117
Bearing and Seal: Journal Bearing / O-Ring rubber seal
No. of Rows: 3-3-2
Inner Row: Wedge mill teeth / 33 pcs
Gauge Row: Wedge mill teeth / 32 pcs
Trimming Row: Wedge / 17 pcs
Bevel Row: Flat / 32 pcs
Pin Connection: 6 5/8 REG
Bit Weight (KG): 98.0
Weight on Bit (KN/mm): 0.35 ~ 0.90
ROP (rpm): 80 ~ 150



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– Applied with new tooth bits design, with hard facing on the tooth surface and bevel of the cones. Attached carbide inserts on the bevel of cones as well to protect the diameter.
– Adopting a new type of Journal bearing structure greatly prolongs the working life of the bearing, and has the ability to withstand medium bit pressure and adapt to higher speed.
– Adopting a new type of O-shaped rubber sealing ring, which is more suitable for the working environment and parameters of the roller cone bit.
– A new type of sealing structure is adopted to match the sealing performance with 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.