9-7-8-iadc517-tricone-bit

9-7-8-iadc517-tricone-bit

 

 

Product Name: 9 7/8″ IADC517G TCI Tricone Bits & Oil Drill Bit
Size: 9 7/8″ (250.83 mm)

The 9 7/8″ IADC517G TCI Tricone Bit is a high-performance rotary drill bit engineered for use in oil, gas, water well, and geothermal drilling. Manufactured in compliance with the SY/T5164 industrial standard, this bit is specifically designed for soft formations with low compressive strength and high drillability, such as shale, clay, sandstone, and soft limestone. Its robust design, durable materials, and optimized cutting structure make it an ideal choice for efficient and cost-effective drilling operations.

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Type and Application

The bit falls under the IADC517G classification, as per the International Association of Drilling Contractors (IADC) code. The “517” indicates a TCI (Tungsten Carbide Insert) tricone bit optimized for soft formations, while the “G” suffix designates gauge protection—a feature critical to maintaining borehole diameter and bit longevity in abrasive environments.

This bit is well-suited for formations that are soft but may contain mildly abrasive elements. Its structure promotes high rate of penetration (ROP) while minimizing vibration and torque fluctuations. It is ideal for projects where drilling speed and cost efficiency are top priorities, particularly in oilfield and shallow gas wells, water wells, and exploratory boreholes.

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Cutting Structure: TCI Inserts

The cutting elements of this tricone bit consist of Tungsten Carbide Inserts (TCI), which are known for their superior hardness, heat resistance, and wear durability. In soft formations, these inserts provide aggressive cutting action, ensuring rapid rock fragmentation and minimal bit wear. The tooth geometry is specifically designed for deep penetration and efficient material removal without clogging, making it suitable for sticky formations like clay and shale.

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Bearing System: Rubber Sealed Bearing

The bit features a rubber sealed journal bearing, which provides smooth operation and superior sealing against the intrusion of drilling fluids and cuttings. This sealed system is lubricated internally, helping maintain optimal performance under varying downhole conditions. The rubber seal effectively prolongs the life of the bit by reducing internal wear and minimizing friction.

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Thread and Connection

Equipped with a 6 5/8″ API Regular (Reg) pin, this tricone bit offers compatibility with a wide range of drill collars and bottom hole assemblies. The API Reg connection is an industry standard, known for its robustness and ease of handling. It provides a strong, reliable link between the bit and the drill string, ensuring operational safety and mechanical integrity even under high-torque conditions.

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Gauge Protection

The gauge protection on this bit includes hardfacing and additional TCI inserts along the outer diameter to protect the bit’s gauge area from wear. This feature is essential in maintaining hole size throughout the drilling operation and prevents under-gauge holes, which can lead to difficulties in logging, casing, or future downhole tool passage.

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Operating Parameters

The bit is designed to perform within an optimal Weight on Bit (WOB) range of 0.35 to 1.05 KN/mm and a rotary speed (RPM) of 120 to 50 r/min. Operating within these parameters ensures maximum efficiency, consistent ROP, and minimal mechanical stress on the bit and drill string components.

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Physical Specifications

This tricone bit weighs approximately 70 kg, making it a manageable size for standard drilling rigs and operations. Its medium weight contributes to operational stability and allows for effective downward force application without overstressing the drill string.

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Standard and Quality

Manufactured under the SY/T5164 industrial standard, this drill bit meets stringent requirements for dimensional accuracy, material quality, and performance reliability. SY/T5164 compliance ensures that the product is suitable for professional use in high-stakes drilling environments, guaranteeing dependable results with every operation.

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Conclusion

The 9 7/8″ IADC517G TCI Tricone Drill Bit is a trusted and efficient solution for soft formation drilling. With its aggressive cutting structure, rubber sealed bearings, API Reg connection, and gauge protection, it delivers exceptional performance in terms of penetration rate, durability, and operational cost-efficiency. Whether used in oilfield development or water well drilling, this bit is engineered to handle the job with speed, precision, and reliability.