12 1/4” SHA517GKT

12 1/4” SHA517GKT

• Product profile

1. Adopt high strength and high wear resistance carbide inserts.
2. New journal bearing structure greatly prolongs the working life of the bearing, and has the ability to withstand medium bit pressure and adapt to high speed.
3. The improved performance of the new fluorinated rubber seal ring makes it more suitable for the working environment and service parameters of drill bits
4. Adopt new sealing structure to match the bearing structure, which greatly improves the service life of drill bit
5. T feature, between the outer rows and cone back rows inserted a protection row carbide inserts.
6. K feature, the inner row adopts wide-topped spoon insert, which increases the cutting width of the insert and improves the drilling efficiency.

• Cutting layout

4-4-4

• Applicable formation 

Designed for water well drilling, suitable for soft formations with low compressive strength and high drill-ability, such as shale, clay, sandstone and soft limestone.

• Lug protection

The shirttail and lug back is protected by wear-resisting carbide insert.

• Product Specification

IADC code:              517

Bit type:                12 1/4 SHA517GKT

Bearing type:            Journal bearing/Flat rubber sealing ring

Circulation type:         Mud

Cutting structure:

Inner rows:              Spoon

Outer rows:              Off-wedge

Bevel row:               Flat

Pin connection:           6 5/8” REG

Bit diameter:             311 mm

Bit weight:              98 Kg

• Operating suggestion

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

Weight on bit:  0.35~1.05 kN/mm

Rotation speed: 50~120 r/min