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 349.2 mm (13 3/4") to 660.4 mm (26"), these bits deliver consistent performance in soft to hard rock formations, making them a cost-effective choice for surface holes and upper well sections.
Request a Quote View SpecificationsKey Features
Universal Design
Engineered for maximum versatility across soft to hard geological formations, reducing the need for multiple bit types on a single project.
Wide Size Range
Available in diameters from 349.2 mm (13 3/4") to 660.4 mm (26"), covering the large wellbore sizes used for surface holes and upper well sections.
Reliable Bearings
Open (non-sealed) roller bearing with rollers in large and small roller races: without sealing elements the journal size is maximized and full circulation in the bearing reduces torque, speeds cooling and extends bearing life.
Optimized Cutting Structure
Milled steel teeth or tungsten carbide inserts (depending on the IADC code) 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 | 349.2 mm (13 3/4") to 660.4 mm (26") |
| Formation Hardness | Soft to Hard |
| IADC Codes | 111, 211, 213, 311, 423X, 523X, 543X, 623Y, 633Y, 713Y |
| Bearing Type | Open (non-sealed) roller bearing |
| Cutting Structure | Tungsten Carbide Inserts (TCI) / Milled Tooth |
| Connection Type | API Regular pin (6 5/8" and 7 5/8" Reg) |
| Circulation | Combined jet |
| Operating Method | Rotary Table Drilling |
| Max WOB | Up to 35 kN per inch of bit diameter |
| Recommended RPM | 60 - 200 RPM |
In Stock in Dubai
Grand (GRD) bits currently held at our Dubai warehouse and ready to ship. Prices on request — press Request price to add the item to the form below.
| Model | Size | IADC | Nozzles | Availability | |
|---|---|---|---|---|---|
| GRD111 | 17 1/2" (444.5 mm) | 111 | 24/32 + 2×26/32 | In stock: 1 pc | Request price |
| GRD211 | 17 1/2" (444.5 mm) | 211 | 24/32 + 2×26/32 | In stock: 1 pc | Request price |
Application Areas
Oil & Gas Exploration
Ideal for surface holes and upper sections of oil and gas wells, including conductor and protective casing intervals, in soft to hard formations.
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 hard 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 349.2 mm (13 3/4") to 660.4 mm (26") covers the large wellbore sizes used for surface holes and upper well sections. Whether you are drilling a 26-inch surface hole or a 13 3/4-inch upper section, the GRD series provides a proven and cost-effective option, especially when drilling a small number of wells. The open (non-sealed) roller bearing has no sealing elements, which maximizes the journal size and gives full circulation in the bearing for lower torque, rapid cooling and longer bearing life.
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.