Method for determining drilling malfunction by correlation...
Method for determining drilling malfunction by correlation...
Method for monitoring the wear of a rotary type drill bit
Method of assaying downhole occurrences and conditions
Method of monitoring wear of rock bit cutters
One cone bit with interchangeable cutting structures, a...
Rock bit cone lock and method
Rock bit loose cone indicator
Roller bit rearing wear detection system and method
Roller bits with bearing failure indication, and related...
System and method for controlling drill bit usage and well plan
System and method for detecting roller bit bearing wear...
Wear determination of drilling bits