steel tooth tricone drill bit, jz rock bit, tricone rock bit, roller bit

Size

8 1/2”(**5.9MM)

IADC

**7

Bearing Type

Elastomer sealed journal bearing

Thread Connection

4 1/2 reg pin

WOB(KN/mm)

0.*5~1.0

RPM(r/min)

**0~*0

Applicable Formations

 medium to hard hardness formations with low compressive strength, such as medium, soft shale, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds, etc

Circulation system

Mud pump

*0mm,*5mm,*6mm,*3mm,*5mm,*8mm(3 7/8”),**1.6mm,**4mm,**8mm,**0mm,**7mm(5”)

**0.1mm(5 1/8”),**3.3mm(5 1/4”),**9.7mm(5 1/2”),**2.8mm(5 5/8”),**9.2mm(5 7/8”)

**2.4mm(6”),**5.5mm(6 1/8”),**8.7mm(6 1/4”),**1.9mm(6 3/8”),**5.1mm(6 1/2”)

**0.5mm(7 1/2”),**3.6mm(7 5/8”),**0.0mm(7 7/8”)

**2.7mm(8 3/8”),**5.9mm(8 1/2”),**2.2mm8 3/4”)                                                                                                         

**1.3(9 1/2”),**4.4(9 5/8”),**0.8(9 7/8”)

**9.8(*0 5/8”),**5.3(*1 5/8”)

**1.1(*2 1/4”),**6.0 (*3 5/8”),**9.2(*3 3/4”)