12 1/4" DHA537GT

12 1/4" DHA537GT

• Product profile

1. Adopt high strength and high wear resistance carbide insert.
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

• Cutting layout

5-4-4

• Applicable formation 

Designed for water well drilling, suitable for formations with low compressive strength, medium softness and hard abrasive interlayers, such as hard shale, anhydrite, soft limestone, sandstone and interlayer dolomite.

• Lug protection

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

• Product Specification

IADC code:              537

Bit type:                12 1/4 DHA537GT

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:  0.5~1.05 kN/mm

Rotation speed: 40~110 r/min