product-CBT Rock PDC Bit ManufacturerTCI tricone drill bits, also known as tungsten carbide insert tricone bits, are three-cone roller bits designed for drilling through medium-hard to hard rock formations.
Each bit consists of three rotating cones fitted with tungsten carbide inserts (TCI). As the cones rotate, the inserts crush and fracture the rock at the bottom of the borehole. Different insert shapes, sizes, and arrangements provide varying cutting characteristics for different geological conditions.
Compared with steel tooth tricone bits, TCI bits use separate tungsten carbide inserts instead of milled steel teeth. Their high hardness and wear resistance make them suitable for drilling in harder and more abrasive formations, including hard limestone, sandstone, dolomite, and other competent rock formations.
We supply TCI tricone drill bits in multiple diameters, IADC classifications, and API Reg Pin connections for oil and gas drilling, water well construction, mining exploration, and other rotary drilling applications.
Key Features of TCI Tricone Drill Bits
1. Tungsten Carbide Inserts
The cutting structure uses tungsten carbide inserts with high hardness and wear resistance. Different insert geometries are available to accommodate varying rock hardness and formation abrasiveness.
2. Three-Cone Roller Design
Three independently rotating cones distribute the cutting action across the borehole bottom. The combination of rolling and crushing helps break rock efficiently while maintaining drilling stability.
3. Multiple IADC Classifications
Different IADC classifications correspond to different cutting structures and formation applications. Available models include IADC 517, 537, 617, 837, 427, 437, 527, 637, and 737.
4. Multiple Diameter and Thread Options
TCI tricone bits are available in diameters from 5-1/2" (139.7 mm) to 17-1/2" (444.5 mm), with different API Reg Pin connections to suit drilling equipment and operational requirements.
Applications of TCI Tricone Bits
TCI roller cone bits are widely used in rotary drilling operations where durable cutting structures are required for medium-hard to hard rock formations.
Oil and Gas Drilling: Used for drilling through sandstone, limestone, dolomite, and other subsurface formations in oil and gas wells.
Water Well Drilling: Suitable for drilling through hard rock aquifers, consolidated sandstone, limestone, and other geological formations during deep water well construction.
Mining and Mineral Exploration: Applied in mineral exploration, production drilling, and geological investigation involving hard and abrasive rock formations.
Geotechnical and Foundation Drilling: Used in ground investigation and selected foundation drilling projects where hard rock penetration is required.
TCI Tricone Bit Specifications
Available IADC Codes: 517, 537, 617, 837, 427, 437, 527, 637, 737
Diameter and API Reg Pin Connections
| IADC Code | Bit Diameter (Inch) | Diameter (mm) | API Reg Pin (Inch) |
|---|---|---|---|
| — | 5-1/2" | 139.7 | 3-1/2" |
| — | 5-7/8" | 149.2 | 3-1/2" |
| — | 6" | 152.4 | 3-1/2" |
| — | 6-1/4" | 158.8 | 3-1/2" |
| — | 6-1/2" | 165.1 | 3-1/2" |
| — | 6-3/4" | 171.4 | 3-1/2" |
| — | 7-1/2" | 190.5 | 4-1/2" |
| — | 7-7/8" | 200.0 | 4-1/2" |
| — | 8" | 203.2 | — |
| IADC 517 | 8-1/4" | 209.6 | 4-1/2" |
| IADC 537 | 8-3/8" | 212.7 | 4-1/2" |
| IADC 617 | 8-1/2" | 215.9 | 4-1/2" |
| IADC 837 | 8-3/4" | 222.2 | 4-1/2" |
| IADC 427 | 9-1/2" | 241.3 | 6-5/8" |
| IADC 437 | 9-5/8" | 244.5 | 6-5/8" |
| IADC 527 | 9-7/8" | 250.8 | 6-5/8" |
| IADC 637 | 10-5/8" | 269.9 | 6-5/8" |
| IADC 737 | 11" | 279.4 | 6-5/8" |
| — | 11-5/8" | 295.3 | 6-5/8" |
| — | 12-1/4" | 311.1 | 6-5/8" |
| — | 13-1/8" | 333.4 | 6-5/8" |
| — | 13-5/8" | 342.9 | 6-5/8" |
| — | 13-3/4" | 349.3 | 6-5/8" |
| — | 14-5/8" | 355.6 | 7-5/8" |
| — | 14-3/4" | 374.6 | 7-5/8" |
| — | 15" | 381.0 | 7-5/8" |
| — | 15-1/2" | 393.7 | 7-5/8" |
| — | 16" | 406.4 | 7-5/8" |
| — | 17-1/2" | 444.5 | 7-5/8" |
Note: IADC codes and API Reg Pin connections are listed according to the available specifications. Please confirm the required configuration when ordering.
How to Select a TCI Tricone Drill Bit
Selecting the right TCI tricone bit involves matching its cutting structure and connection specifications to the drilling conditions.
Formation Hardness: Evaluate rock hardness and abrasiveness to determine the appropriate IADC classification and carbide insert configuration.
Bit Diameter: Select the diameter according to the required borehole size and drilling program.
API Thread Connection: Check compatibility with the drill string and drilling equipment.
Operating Conditions: Consider weight on bit (WOB), rotary speed (RPM), drilling depth, and drilling fluid circulation.
When requesting a quotation, provide the required bit diameter, IADC classification, and API thread connection.