OPTIMUN WEAR
WHY / TO DO
#FeelSharp
#Comet Tails
#Wear is even
#OD / ID Within gage
OD GAGE LOSS
WHY / TO DO
#Vibration
#RPM to High
#Reaming the hole
#Fluid Flow To Low
ID GAGE LOSS
WHY / TO DO
# WOB too high
# Re‐drilling a lost core => check core lifter
# Matrix too soft => select lower series
# Fluid flow to low
BURNT
WHY / TO DO
# Drilled without water
# Check rod’s leak
# Control core lifter case position in bit
# Check your pump
POLISHED
WHY / TO DO
# Matrix to hard => take higher series
#Comet Tails
# Water flow to high
# WOB too low
OUTSIDE WEAR
WHY / TO DO
# Fractured formation
# Reamer undersize
# Not enough mud
# Check source of vibration (rods, reamer)
# Change RPM
INSIDE Wear
WHY / TO DO
# WOB too high => increase RPM
# Re‐drilling a lost core => check core lifter
#Wear is even
# Broken formation