The T2 double core barrel 66 is a thin-wall double tube core barrel designed to balance high drilling speed with precise core recovery. With an outside diameter of 66 mm, it delivers fast penetration in homogeneous ground while significantly reducing diamond consumption. Thanks to its optimized design, this core barrel maximizes recovered core volume, larger than that obtained with a T6 barrel of the same outside diameter. Every barrel in the T2 range features an inner tube mounted on bearings, ensuring smooth rotation and better sample preservation—a key benefit for geotechnical or mining reconnaissance campaigns.
Technidrill offers the double tube core barrel T2 in 46–101 mm diameters and 1,500 mm or 3,000 mm lengths to match site requirements.

Why choose the double tube core barrel T2?

• Enhanced core preservation: the double-wall architecture and bearing-mounted inner tube reduce stress on the sample.
• High drilling cadence: the thin wall lowers cutting area and supports faster advance.
• Controlled costs: reduced downhole effort helps optimize diamond usage.
• Larger core volume: for the same outside diameter, the T2 yields a more generous core than a T6.

Technical specifications

• Type: double tube core barrel T2, thin-wall
• Model outside diameter: 66 mm
• Available diameters: 46–101 mm
• Lengths: 1,500 mm or 3,000 mm
• Inner tube: bearing-mounted for precise core guidance

The T2 double core barrel for geotechnical drilling

In geotechnical drilling, core quality directly drives the reliability of lab tests and stratigraphic interpretation. A T2 core barrel like the 66 reduces sample disturbance because the inner tube accompanies the core during cutting. The result is better-preserved cores, higher recovery ratios, and a smoother sampling chain from pull-out to packaging. This consistency secures results, reduces rework, and helps optimize total cost per meter.

Technidrill engineering office: standard or custom

The Technidrill engineering office designs and upgrades core barrels to meet real-world site constraints, with two complementary approaches:

• Standard ranges (including the T2 series) regularly optimized for reliability and performance.
• Custom developments: specific dimensions, crown geometries, connections, and configurations tailored to your target lithologies.

Leveraging field feedback and testing, the R&D team targets measurable gains in penetration, sample integrity, and cost per meter.
Want to contact us? Visit the team page to find your local representative.