Tri-cone bit type

9 7/8'' 115

Diameter

250.8mm

IADC

115

API Pin Connection

6 5/8'' API REG

WOB(KN/mm)

0.35~0.9

RPM(r/min)

150~80

Applicable Formation

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

Features

It   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.