8 1/2 inch 215mm IADC 437 tungsten carbide insert bit journal bearing

Diameter

8 1/2''

Tooth Type

TCI

Bearing Type

Elastomer sealed bearing

Circulation Type

Mud fluid

Thread Connection

4 1/2 API REG PIN

Nozzle

three jet nozzles

Gauge Protection

Available

Shirttail Protection

Available

Operating Parameters

RPM(r/min)

150~70

WOB(KN)

0.35~0.9

Formations

Very soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk, gypsum, salt, soft limestone, etc.

Application

water well drilling,oil &gas well drilling ,HDD,exploration,geothermal well drilling,drilling projects,etc