8 1/2“ Steel Teeth Tricone Bit

Suitable for surface hole drilling for every kind of wells and upper section with good drillability. its advantages including low cost and a high top. etc. The drilling fluid can flow into the bearing cavity directly to cool due to no seal. For the bit, bearing structure of roller-ball-roller-thrust is utilized.

Medium hard with high compressive strength and semi-abrasiveness, such as hard limestone, hard sandstone, hard sandstone, and dolomite, etc.


Palm back alloy full coverage

Multiple gauge protection with gauge trimmers on the heel of the cone, tungsten carbide insert, and hard facing on the shirttail increases gauge holding capability and bearing life.

Hard alloy nozzle

Can control the flow of water, reduce the heat in the process of the bit, increase the service life of the bit.

Screw thread

The upper part of the drill bit is provided with a thread for connecting with the drill string.

According to your requirements, we can modify the screw and also provide the corresponding conversion connector.

Hard-coated with a hard alloy layer

This can reduce the bearing wear and greatly improve the service life of the bit.

High-quality teeth

On the base of a cone forged from high-quality alloy steel,cut out the teeth directly by cutting.

Export packing

Usually is one piece tricone bit in each wooden box as standard export packing, also we can meet your special requirement.

Additional information


8 1/2 inch

Thread Connection

4 1/2" API Thread



Flow Rate(lps)


Making up Torque(Kn.m)




Nozzle Qty/Type



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