A RIG FOR WELLBORE OPERATIONS

摘要

A rig for wellbore operations comprising a rig floor (806), at least one mat (810) on said rig floor (806), and energizing apparatus (812) associated with said at least one mat (810) for energizing wave-energizable identification apparatus (820) ofan item (808) movable adjacent said at least one mat (810)and with respect to said rig floor (806).