As part of IADC’s ongoing efforts to modernize and update its drill bit dull grading system, the Advanced Rig Technology (ART) Committee held a training session from 07.00-08.30 on 12 April on bit and BHA forensics. The virtual session is a collaborative effort with the International Association of Directional Drilling.

The learning objectives cover how to incorporate forensic analysis of bit and BHA wear scars and fractures as a diagnostic tool for identifying key limiters and corrective actions. The session explores the observations and documentation used in such analysis.

Other topics explored include:

Bit forensics:

• Reading fracture initiation and direction of loading
• Erosion and corrosion
• Bit wear scars – mechanical and thermal

BHA forensics:

• BHA wear scars and direction of motion
• Torsion and HFTO loads
• Bit balling and ribbon flow

Paul Pastusek, Drilling Mechanics Advisor for ExxonMobil, leads this training session.

To participate in the hands-on demonstrations in this training, obtain:

• 3 pieces of good quality chalkboard white chalk
• Two pieces of sand paper, one course (~60 grit), one fine (~220 grit), minimum 3×5 inch
• One piece of paper or smooth card stock, minimum 3×5 inch
• One or more Oreo™ cookie(s) (or similar laminated cookie with hard outer layers and inner deformable layer)