Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Giancarlo T. Pia0
Date of Patent
March 27, 2007
0Patent Application Number
102760890
Date Filed
June 27, 2001
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An expandable drill bit comprises a body for mounting on a support string and two roller cutters mounted on the body. The cutters are movable between a smaller diameter first configuration and a larger diameter second configuration. In one embodiment the bit is adapted to drill with the cutters in both the first and second configurations.
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