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Product Specification
  Type specification(inch):
12 1/4
  Type specification(mm):
311.1mm
  IADC:
637
  Additional features:
G
  Formation:
High pressure resistance,medium hard formation with hard and thick interlayer.
  Drilling condition:
rotary drilling、high temp.drilling、deep drilling、motor drilling
  Bearing Type:
journal bearing
  Total teeth count:
260
  Gage row teeth count:
75
  Number of gage rows:
3
  Number of inner rows:
14
  Journal angle:
36°
  Offset:
6.5
  API connection(REG pin):
6 5/8
  Weight on bit(KN):
156-373
  Rotary speed(Rpm):
220-40
  Recommened upper torqueKN.M:
37.93-43.3
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