CDDA AGM 2007 0 ‘Deep Hole Innovations’ C. Drenth & C. James Variable Wall Coring Rod Fast...

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1CDDA AGM 2007

‘Deep Hole Innovations’C. Drenth & C. James

Variable Wall Coring Rod

Fast Descent Core Barrel*

Alpha Stage3 Diamond Bit*

* Patents Pending

CDDA AGM 2007

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Variable Wall Rod Features– Internally-upset mid-body

– RQ or HD Thread

– Up to 30% less weight in the drill rod

– Increased rig capacity & easier rod handling

– Improved flexibility in deviated holes

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Driller Advantage– Increased inner tube clearance…

…Increases core tripping up to 20%, in and out

(tripping is the largest component of the drilling cycle)

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Bend Strength…STRAIGHTEN, FULL ANNEAL

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Applied strain

idual Strain

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Exclusion zone

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‘Fast Descent’ Core Barrel Features– Fluid porting in the head assembly, decreasing drag– Improved link latch technology, decreasing drag

Fast Descent Core Barrel

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Fast Descent Core Barrel

Driller Advantage– Up to 30% increase in descent speed…

…Reduces core tripping times– Maximum increase with the V-Wall Rod…

…Up to 50% with both products– Compatibility…

…F/D heads fully compatible with BQ®, NQ®, HQ® c/bbls

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Technical Advancements in Bit Design

Stage 3

Chris James

Boart Longyear

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Stage 3 Concept

25mm crown Height

Engineering Task: Bit that lasts significantly longer in the hole

Challenge: Increasing crown height without losing structural integrity

3 Stage design

Creation of staggered 8.5mm waterways. As the bit wears a new stage of waterways is revealed. Waterways in next stage open before the previous stage finishes.

Face design equals the same area as an Express geometry. Longer segments also allow for increase gauge protection.

Productivity

The face design has also proven to be more efficient. The increase penetration rate is a result of the improved balance between surface contact and flushing ports.

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Stage 3 Value Proposition

– Results to date have seen improvement in bit life in excess of 2x and in many cases 3x +.

– Less rod tripping to change out the bit, holes are completed in less time.

– Unique design offers both improved meters / shift and increased bit life.

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Stage 3 Case Study

Site Details

Location: Manitoba, Canada

Rock Type: Hard Abrasive Quartz

Product: BQ 08 ABR Stage3

Equipment: BLY LM 75 drill rig

Site Details

Location: Sudbury Basin, Canada

Rock Type: Medium Hard Abrasive to Ultra Hard.

Product: NQ 07 COM Stage 3

Equipment: BLY LY Hydro 55, LY 55

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