8-1/2 " (215.9mm) IADC 435 TCI Tricone Drill Bit Drilling Tool

Tungsten Carbide Insert (TCI) bits are are used middle to hard rock formation which offers a variety of carbide inserts such as spherically shaped inserts for very hard rock or conically shaped inserts for softer rock. The number of rows of inserts is directly related to the type of application and the size of hole to be drilled. here are also open and sealed bearings available as well as three types of shirttail protection to choose from. TCI stands for Tungsten Carbide Insert.Our TCI tricone bits are specially built for medium to hard rock formations. We provide diverse carbide inserts and multiple bearing structures to match different drilling demands. Widely applied in water well drilling, oil & gas exploration, mining, foundation engineering and geotechnical drilling. Our target clients include global drilling contractors, engineering firms, importers, wholesalers and construction companies. Every bit follows strict production standards, with optional protective designs to extend service life, delivering stable and cost-effective drilling solutions worldwide.

There are primarily three types of bearing designs for tricone drilling bits:

• STANDARD OPEN BEARING ROLLER BIT: The cones spin freely, equipped with front ball bearings and rear roller bearings.
• SEALED BEARING ROLLER BIT: Fitted with O-Ring seal and grease reservoir for bearing cooling. The seal blocks mud and cuttings to protect internal bearings.
• JOURNAL BEARING ROLLER BIT: Adopts oil/grease cooling system, with nose bearings, O-Ring seal and race structure for superior performance.

1. Oil and gas well drilling
2. Water well & geothermal well drilling
3. Mining and mineral exploration
4. Highway & railway foundation engineering
5. Geotechnical investigation drilling
6. Construction pile foundation drilling

6. Certification & Package

1. Professional Factory Strength: We are a professional tricone bit manufacturer with complete production lines, full quality inspection procedures and stable large-scale production capacity.
2. Customization Service: Support OEM & ODM services, we can customize size, structure, inserts and logos as per client requirements.
3. International Standards: All products strictly comply with API and IADC international drilling industry specifications.
4. Diversified Options: Multiple bearing types, inserts and protective structures are available to meet various drilling environments.
5. Full Qualifications: Complete industry certificates, products exported to dozens of countries and regions with reliable after-sales support.

Q1: What factors should we consider when choosing a tricone drill bit?

A1: You need to check geological conditions, borehole diameter, IADC code, bit type (TCI/Steel Tooth), bearing style and optional protective structures.

Q2: What’s the difference between open bearing and sealed bearing bits?

A2: Open bearing bits allow free cone rotation; sealed bearing bits adopt O-Ring and grease reservoir to prevent mud and debris from damaging bearings.

Q3: What rock formations are TCI tricone bits suitable for?

A3: They are ideal for medium, hard and extremely hard rock formations.

Q4: Do your products follow international industry standards?

A4: Yes, all our tricone bits are manufactured in accordance with API and IADC standards.

Q5: Can you provide customized tricone bits?

A5: Definitely. We offer OEM and ODM service for sizes, inserts, logos and special structural designs.

Q6: What information is included in the IADC bit passport?

A6: It contains cone specs, quality inspection stamp and recommended drilling parameters including bit weight, rotation speed and flushing volume.