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8 1/2"(215.9mm) TCI Tricone Bit IADC637G for Hard Rock Drilling

Summary information
8 1/2 inches TCI Tricone Bit
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API Certified factory of Tricone Bits and PDC bits
API is American Petroleum Institute, it is Authoritative in the world.
All products are produced in lines of API specifications.

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Specifications IADC637G
Diameter  8 1/2"(215.9mm)
Bearing Type  Elastomer sealed bearing
Tooth Type  TCI(Tungsten Carbide Inserts)
Circulation Type  Mud fluid
Thread Connection  4 1/2 reg pin
Gauge Protection  Available
Shirttail Protection  Available
Operating Parameters  
RPM(r/min) 80-40
WOB(KN) 108-258
Formations Hard formation with high compressive strength, such as hard shale, sandstone, dolomite, hard gypsum, chert, granite, etc.


8 1/2 inches(215.9mm) tricone bit is a very regular size. Applications covers vertical well drilling like water well drilling, oil/gas well, and horizontal drilling like trenchless/No-Dig/HDD application. 

Besides that, (roller cones 1/3, thirds) of 8 1/2" tricone bits which cone-diameter is 133mm are widely used in foundation rock piling field. 

Steel raw materials 15CrNiMo for the arm and 15MnNi4Mo for the cone, the cutting teeth which we call it Inserts or TCI(Tungsten Carbide Insert) is hard alloy for drilling hard rocks, especially the IADC637G  that has conical ball shape tungsten carbide inserts or spherical shape inserts has very good performance in drilling hard rocks.

The bearing is vital to the working-life of tricone bit, we adopt the most advanced design and precise CNC machine and following API specification to warranty quality.


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