5 1/2″ WHA637YT
Specifications
Size: 5 1/2″ (139.7 mm)
IADC: 637
Bearing and Seal: Journal Bearing / O-Ring Rubber seal
No. of Rows: 5-4-4
Inner Row: Conical / 85 pcs
Gauge Row: Ovoid / 43 pcs
Trimming Row: Wedge / 18 pcs
Bevel Row: Ovoid / 43 pcs
Pin Connection: 3 1/2 REG
Bit Weight (KG): 14.5
Weight on Bit (KN/mm): 0.60 ~ 1.1
ROP (rpm): 40 ~ 90
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– Adopting the Journal bearing structure, it has the ability to withstand medium WOB and adapt to higher ROP.
– The O-ring seal is made of wear-resistant andhigh-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.
– 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.
– T feature, there is a trimming row between the gauge row and bevel row to protect the cones and trim the well wall.
– Y feature, the main cutting teeth of the cone are conical teeth, which have strong fracture resistance and formation penetrationability, and are suitable for drilling in hard and brittle formations andgravel interlayers.