Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
February 12, 2013
Patent Application Number
13360424
Date Filed
January 27, 2012
Patent Citations Received
Patent Primary Examiner
Patent abstract
An apparatus and methods for manipulating and driving casing. The apparatus includes mechanically responsive elements for gripping an interior of a casing joint, and hydraulically responsive elements for gripping an interior of the casing joint responsive to pressure of drilling fluid flowing through the apparatus. One method comprises manipulating a casing joint by mechanically gripping an interior thereof, hydraulically gripping the interior of the casing joint responsive to drilling fluid pressure, and rotating the casing joint. Another method comprises driving casing by applying weight and torque thereto through engagement with an interior thereof.
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