Tri-cone bit type

9 5/8'' 127

Diameter

244.5mm

IADC

127

API Pin Connection

6 5/8'' API REG

WOB(KN/mm)

0.35~1.00

RPM(r/min)

150~70

Applicable Formation

Soft   with low compressive strength and high drillability, such as shale, clay,   salt bed and soft limestone, etc.

Features

This   bit adopts rubber seal with journal bearing, which can sustain higher WOB   under normal rotary speed and is suitable for drilling in formations from   very soft to middle hard by properly selecting different cutting structure.

  Note:   the upper limits for the bit weight and rotary speed recommend in the table   can not be      used at the same time.