Adaptive filter prediction method and system for detecting...

Apparatus for detecting drill bit wear

Differential sensor measurement method and apparatus to...

Down-hole earth drilling motor capable of free circulation

Downhole abrading tools having excessive wear indicator

Downhole abrading tools having excessive wear indicator

Downhole abrading tools having fusible material and uses...

Drill bit with wear indicating feature

Fixed cutter drill bit

Force-balanced roller-cone bits, systems, drilling methods,...

Impregnated bit with PDC cutters in cone area

Lubrication failure detection system

Mean strain ratio analysis method and system for detecting...

Method and apparatus for detecting wear of a rotatable bit

Method and apparatus for determining drill string movement mode

Method and apparatus for determining potential abrasivity in...

Method and system for predicting performance of a drilling syste

Method and system for predicting performance of a drilling...

Method and system for predicting performance of a drilling...

Method and system for predicting performance of a drilling...