CDDA AGM ‘Deep Hole Innovations’ C. Drenth & C. James  Variable Wall Coring Rod  Fast Descent Core Barrel*  Alpha Stage3 Diamond Bit* * Patents Pending CDDA AGM 2007

1 Variable Wall Coring Rod  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

CDDA AGM Variable Wall Coring Rod  Driller Advantage –Increased inner tube clearance… …Increases core tripping up to 20%, in and out (tripping is the largest component of the drilling cycle)

CDDA AGM Variable Wall Coring Rod  Bend Strength… Exclusion zone

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

CDDA AGM 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

CDDA AGM Technical Advancements in Bit Design Stage 3 Chris James Boart Longyear

CDDA AGM 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.

CDDA AGM 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.

CDDA AGM 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

CDDA AGM ‘Deep Hole Innovations’ C. Drenth & C. James  Variable Wall Coring Rod  Fast Descent Core Barrel*  Alpha Stage3 Diamond Bit* * Patents Pending CDDA AGM 2007