Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
February 27, 2007
Patent Application Number
10754302
Date Filed
January 9, 2004
Patent Primary Examiner
Patent abstract
The present invention provides a method and apparatus for casing while drilling without the use of an underreamer. In one aspect, the invention provides a flexible drill collar that enables drilling of a large enough borehole for passage of the casing string therethrough.
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