GrandXtreme (GRDX) Roller Cone Bits
Premium Performance for Extreme Drilling Conditions
The GrandXtreme (GRDX) series is the flagship roller cone product line from VBM, engineered for the most demanding drilling environments. These premium bits incorporate advanced sealed journal bearings, proprietary cutting structures, and reinforced gauge protection to deliver maximum footage per bit and lowest cost per meter under extreme drill-string loads in the upper sections of wells.
Request a Quote View SpecificationsKey Features
Maximum Footage
Milled tooth or premium carbide insert cutting structures deliver industry-leading footage per bit, reducing total well costs significantly.
Extreme Durability
Premium sealed journal bearing with O-ring, two floating bushings and a thrust washer made of wear-resistant, silver-plated material withstands extreme drill-string loads in the upper sections of wells.
Reinforced Gauge
Multi-layer gauge protection with hardfacing and strategically placed carbide inserts maintains hole diameter throughout extended bit runs.
Advanced Hydraulics
Combined jet nozzle arrangement ensures superior bottom-hole cleaning and efficient cuttings evacuation in all conditions.
Technical Specifications
| Parameter | Value |
|---|---|
| Series | GrandXtreme (GRDX) |
| Bit Type | Roller Cone (Tricone) |
| Diameter Range | 349.2 mm (13 3/4") to 444.5 mm (17 1/2") |
| Formation Hardness | Soft to Extra Hard |
| IADC Codes | 117, 217, 317, 437X, 517X, 537X, 627Y, 837Y |
| Bearing Type | Premium sealed journal bearing with O-ring, two floating bushings and thrust washer (wear-resistant material, silver plated) |
| Cutting Structure | Milled Tooth / Premium Grade Tungsten Carbide Inserts (TCI) |
| Connection Type | API Regular pin (6 5/8" and 7 5/8" Reg) |
| Circulation | Combined jet |
| Operating Method | Rotary Table / Top Drive |
| Max WOB | Up to 50 kN per inch of bit diameter |
| Recommended RPM | 40 - 120 RPM |
In Stock in Dubai
GrandXtreme (GRDX) 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 | |
|---|---|---|---|---|---|
| GRDX537 | 17 1/2" (444.5 mm) | 537X | 24/32 + 2×26/32 + … | In stock: 8 pcs | Request price |
| GRDX837 | 17 1/2" (444.5 mm) | 837Y | 24/32 + 2×26/32 + … | In stock: 1 pc | Request price |
Application Areas
Upper Well Sections
Designed for the most severe drilling conditions in the upper sections of oil and gas wells, where bit integrity and the ability to withstand extreme drill-string loads demand premium bit technology.
High-Pressure Environments
Sealed bearing assemblies and reinforced structures perform reliably under high differential pressures in demanding drilling operations throughout the Gulf region.
Hard Rock Formations
Premium carbide inserts and optimized cutting profiles ensure sustained penetration rates in hard limestones, dolomites, and crystalline formations.
Long Bit Runs
Superior gauge protection and bearing life support the extended bit runs required in large-diameter upper hole sections in demanding formations.
Related Products
Request a Quote for GrandXtreme (GRDX)
Contact our technical team for pricing, availability, and custom configurations. We provide fast delivery across the UAE and the entire Middle East region.
GrandXtreme (GRDX): The Pinnacle of Roller Cone Bit Technology
The GrandXtreme (GRDX) series represents the highest level of roller cone bit engineering available from VBM (Volga Burmash). Developed through years of field experience and rigorous laboratory testing, the GRDX line incorporates cutting-edge materials science and precision manufacturing techniques to deliver unmatched performance in the most challenging drilling environments encountered across the Middle East and beyond.
GrandXtreme bits feature milled steel teeth (IADC 117-317) or premium-grade tungsten carbide inserts (IADC 437X-837Y) selected for optimal hardness and toughness balance. The insert geometry is specifically designed using finite element analysis to maximize rock destruction efficiency while minimizing insert breakage, even in highly abrasive and interbedded formations. The result is consistently high rates of penetration maintained over extended bit runs that significantly reduce the number of trips required to reach target depth.
The premium sealed journal bearing in the GRDX series, with an O-ring seal, two floating bushings and a thrust washer made of wear-resistant, silver-plated material, uses high-temperature lubricants that maintain performance at bottomhole temperatures exceeding 175 degrees Celsius. This bearing technology has been field-proven in thousands of wells worldwide, delivering reliable operation even in the most demanding upper-hole sections drilled across Saudi Arabia, the UAE, and Oman.
VBM Middle East maintains strategic inventory of GrandXtreme (GRDX) bits at our Dubai warehouse to ensure rapid availability for drilling operations throughout the region. Our team of experienced drilling engineers provides comprehensive technical support, from pre-job bit selection to post-run analysis, helping operators optimize their drilling programs and achieve the lowest possible cost per meter. Contact us today for pricing and technical consultation on the GRDX series.