8 1/2" SHV537GKT

8 1/2" SHV537GKT

• Product profile

1. Wide top cemented carbide insert with high-strength and high wear resistant are used to improve the strength, wear resistance and cutting performance of the insert.

2.The new journal bearing structure is adopted, which greatly prolongs the working life of the bearing, and has the ability to withstand medium pull down and adapt high rotation speed.

3.The performance of the new fluorinated composite sealing ring is improved, and it is more suitable for the working environment and using parameters of the roller cone bit.

4.The new sealing structure matches the sealing performance with the bearing, thus greatly improving the service life of the drill bit.

• Cutting rows layout

4-4-4

• Applicable formation 

Designed for coalbed methane drilling or water well, low compressive strength, medium soft, such as shale, soft limestone, interbedded dolomite, coal seam, etc.

• Lug protection

The shirttail is protected by cemented carbide insert, the lug back is protected by welded wear-resisting carbide inserts.

• Product Specification

IADC code:               537

Bit type:                 8 1/2 SHV537GKT

Bearing type:             Journal bearing/composite seal

Circulation type:           Mud

Cutting structure:

Inner rows:              Wide top spoon

Outer rows:              off-wedge

Protection row:           wedge

Bevel row:               flat

Pin connection:           4 1/2″REG

Bit diameter:             216mm

Bit weight:              38 Kg

• Operating suggestion

During normal drilling, weight on bit and rotation speed cannot be used at the same time:

Weight on bit:                     0.5～1.05 kN/mm

Rotation speed:                    110～40 r/min