Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Johan Jelgert0
Per Vilen0
Lars-Erik Larsson0
Kent Evermark0
Date of Patent
January 1, 2019
Patent Application Number
14891602
Date Filed
April 9, 2014
Patent Citations Received
Patent Primary Examiner
Patent abstract
A method and apparatus for disconnecting an end rod from a drill string coupled together by a threaded connection is provided. A rod handling apparatus includes a gripper unit having a floating sled with a sensor unit configured to monitor relative axial position of the sled relative to a frame of the gripper unit to determine a decoupling of the threaded connection and a separation of an end rod from the drill string.
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