6 3/4″ DHV637GY
Specifications
Size: 6 3/4″ (171.45 mm)
IADC: 637
Bearing and Seal: Journal Bearing / Composite seal
No. of Rows: 5-4-4
Inner Row: Conical / 88 pcs
Gauge Row: Ovoid / 47 pcs
Trimming Row:
Bevel Row: Flat / 47 pcs
Pin Connection: 3 1/2 REG
Bit Weight (KG): 21
Weight on Bit (KN/mm): 0.60~1.10
ROP (rpm): 40~90
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- Custom Designs
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Formation:
Suitable for high compressive strength, moderately hard and highly abrasive formations, such as limestone, dolomite, sandstone, chert, etc.
Features:
– Adopt high strength and high wear resistance carbide inserts
– Adopting the Journal bearing structure, it has the ability to withstand medium WOB and adapt to higher ROP
– Adopting a new type of flat sealed bearing structure, which increases the stability of the sealed structure and greatly prolongs the working life of the bearing
– The oil storage system can balance the pressure difference inside and outside the bearing, and provide good lubrication guarantee for the bearing system.
