Grand (GRD) Roller Cone Bits
Universal Roller Cone Bits for Rotary Drilling
The Grand (GRD) series represents a versatile line of roller cone drill bits designed for rotary drilling operations across a wide range of geological conditions. Available in diameters from 95.3mm to 660.4mm, these bits deliver consistent performance in soft to medium rock formations, making them the ideal choice for exploration and production wells.
Request a Quote View SpecificationsKey Features
Universal Design
Engineered for maximum versatility across soft to medium geological formations, reducing the need for multiple bit types on a single project.
Wide Size Range
Available in diameters from 95.3mm (3 3/4") to 660.4mm (26"), covering virtually all standard wellbore sizes for oil, gas, and water drilling.
Reliable Bearings
Precision-machined bearing assemblies ensure smooth rotation and extended downhole life under demanding drilling conditions.
Optimized Cutting Structure
Premium tungsten carbide inserts arranged for efficient rock destruction and maximum rate of penetration in target formations.
Technical Specifications
| Parameter | Value |
|---|---|
| Series | Grand (GRD) |
| Bit Type | Roller Cone (Tricone) |
| Diameter Range | 95.3 mm (3 3/4") to 660.4 mm (26") |
| Formation Hardness | Soft to Medium |
| IADC Codes | 1-1-1 through 3-2-7 |
| Bearing Type | Open / Sealed (model-dependent) |
| Cutting Structure | Tungsten Carbide Inserts (TCI) / Milled Tooth |
| Connection Type | API Regular & API Internal Flush |
| Circulation | Center jet / Side jet |
| Operating Method | Rotary Table Drilling |
| Max WOB | Up to 35 kN per inch of bit diameter |
| Recommended RPM | 60 - 200 RPM |
Application Areas
Oil & Gas Exploration
Ideal for surface and intermediate hole sections in oil and gas wells where soft to medium formations are prevalent.
Water Well Drilling
Reliable performance in water well construction across various sedimentary formations including clays, sands, and limestones.
Geothermal Drilling
Proven capability in geothermal exploration where temperature-resistant performance is essential in moderate formations.
Geological Survey
Cost-effective solution for geological survey boreholes and exploratory drilling across diverse terrain conditions.
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Request a Quote for Grand (GRD) Bits
Contact our technical team for pricing, availability, and custom configurations. We provide fast delivery across the UAE and the entire Middle East region.
Grand (GRD) Roller Cone Bits: The Reliable Choice for Rotary Drilling
The Grand (GRD) series from VBM (Volga Burmash) is one of the most widely deployed roller cone bit families in the oil and gas drilling industry. Designed to serve as a universal solution for rotary table drilling operations, these tricone bits have earned a strong reputation for dependable performance across soft to medium geological formations found throughout the Middle East, Central Asia, and beyond.
Manufactured at the Volga Burmash facility using advanced CNC machining and rigorous quality control protocols, every Grand (GRD) bit undergoes comprehensive inspection before shipment. The cutting structure features carefully selected tungsten carbide inserts or milled teeth, depending on the target formation, ensuring optimal rock destruction efficiency and sustained rate of penetration throughout the bit run.
The diameter range of 95.3mm to 660.4mm covers virtually every standard wellbore size used in modern drilling programs. Whether you are drilling a 26-inch surface hole or a 3 3/4-inch pilot hole, the GRD series provides a proven and cost-effective option. The bearing assemblies are designed for longevity, with options for both open and sealed configurations depending on the operational requirements and expected downhole conditions.
VBM Middle East maintains a comprehensive inventory of Grand (GRD) bits at our Dubai warehouse, enabling rapid delivery to drilling sites across the UAE, Saudi Arabia, Oman, Kuwait, Qatar, Bahrain, and Iraq. Our technical support team can help you select the optimal IADC code and configuration for your specific drilling program, ensuring maximum performance and cost efficiency on every well.