LONGYEAR™ DIAMOND BITS

Product

Link

https://www.boartlongyear.com/product/longyear-bits/

Description

Longyear Diamond Bits cut faster and last longer in all ground conditions and especially varying ground conditions. Boart Longyear Drilling Services drillers prefer Longyear bits. New and seasoned drillers alike love the easy selection process, the smooth drilling characteristics, and higher productivity Longyear bits provide.

LONGYEAR™ BITS

The Longyear Bits are similar to large diamond bits, but with the easy, smooth drilling characteristics drillers prefer. This means increased productivity throughout the entire operation, and ultimately more core.

To support higher penetration rates, the new Longyear™ formulas are combined with a new, more open, express geometry. Tapered intermediate waterways improve flushing and prevent accumulation of debris. Designed for fast cutting in competent ground, the new express geometry is available in our 16mm crown heights to maintain bit life at higher cutting speeds.

The unique Razorcut™ protrusions on the face of the bit contain diamonds that enable the bit to begin cutting right out of the box – even in the softest ground. The arrangement of these protrusions also improves the tracking and balance in the hole when drilling begins.

Above: gap in mechanically bonded diamond

Above: no gap in Longyear™ Diamond Bit matrix

By developing a proprietary process of coating diamond bits while in the furnace, Boart Longyear has successfully created a chemical bond between diamond and matrix. The bond acts stronger than the diamond itself and provides higher diamond projection (up to 80% compared to 40% for mechanical bonding) for improved flushing, higher penetration rates, and longer bit life.

Typical diamond coatings do not create a chemical bond, due to the strong oxide on typical titanium coatings, leading to the same 40% diamond projection as mechanical bonding. As a Longyear bit is drilling and the matrix wears down around the bottom, the diamond stays in place longer and acts like a bigger diamond, which results in more meters per bit.

FEATURES

1. Razorcut™
The unique Razorcut™ protrusions on the face of the bit contain diamonds that enable the bit to begin cutting right out of the box – even in the softest ground. The arrangement of these protrusions also improves the tracking and balance in the hole when drilling begins.

2. Longyear™ Matrix*
After significant research, using novel metallurgy, Boart Longyear has successfully created a chemical bond between diamond and matrix, which is stronger than the diamond itself. The increased diamond projection and improved face flushing create a bit with more versatility, higher penetration rates and longer life, similar to large diamond bits, but with the easy, smooth drilling characteristics drillers prefer. This means increased productivity throughout the entire operation, and ultimately more core.

3. Express Geometry
To support higher penetration rates, we have combined the new Longyear™ formulas with a new, more open express geometry. Tapered intermediate waterways improving flushing and prevent accumulation of debris. Designed for fast cutting in competent ground, the new express geometry is available in our 16mm crown heights to maintain bit life at higher cutting speeds.

*Patents Pending.