API 8 1/2" standard sealed bearing tricone roller cone drill bits

The tricone bit is the most popular drilling bit in the world,it can be widely used for Oil&Gas Drilling,Mining,Water Well, Geological Exploration areas.Our tricone bit divideds into metal sealed drill bit and rubber sealed bit.

1,The bearings adopt high precision radial sliding two way thrust bearings,teeth bearing surface hardfacing of hard alloy layer,the roller bearing is made of alloy after welding to improve the carrying capacity and anti bite ability.
2,Using high-precision metal seal. The metal seal is sealed by a carefully designed metal seal ring as a bearing, and two highly resilient rubber seals are located in the palm and the seal area of the teeth as a static seal. The optimized seal compression ensures that the two metal rings The sealing surface always maintains good contact.
3,Steel ball locking cone, suitable for high speed.
4,The use of a limited pressure differential and to prevent the drilling fluid into the lubrication system of the whole rubber reservoir, to provide a good lubrication guarantee for the bearing system .
5,Using the new grease with high resistance to 250 degrees Celsius and anti-wear.

1,The teeth bearing surface hardfacing of hard alloy layer,the roller bearing is made of alloy after welding to improve the carrying capacity and anti bite ability.
2,The 0 - ring sealing ring of the bearing adopts high - saturation nitrile rubber with high wear resistance and high temperature resistance. The sealing ring section is enlarged to reduce the sealing pressure, and the outer end lug is sealed to improve the sealing reliability.
3,Steel tooth bit welding new wear-resistant materials, while maintaining high drilling speed of steel teeth while improving the life of the cutting teeth.
4,The drill bit is made of high strength and high toughness carbide teeth,give full play to the high wear resistance and excellent cutting ability of the tooth cutter with optimized designe of the number of rows of teeth, the number of teeth, the height of the teeth and the unique shape of the alloy teeth.

Cutting Structure 
Steel Tooth: Premium tungsten carbide hard facing on the surface, greatly enhance the wear resistance of the tooth.
Tungsten Carbide Inserts: Various type high quality tungsten carbide inserts can be equipped on the bits, professional and scientific selection of the inserts as per the different application and drilling process to achieve high efficient drilling production.
Gauge Structure 
Multiple gauge protection with gauge trimmers on heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.
Bearing Structure 
Journal bearing and roller bearing types are available to be chosen. Abrasion & seizure resistance, loading capacity, stability of the bearing are well improved, suitable for high speed rotary drilling.
Seals and Lubrication 
The advanced metal seals improve the reliability and stability of the bearing sealing. Pressure difference type compensating system assures a good greasing lubrication function