Method and apparatus for drilling and lining a wellbore

Details Method and apparatus for drilling and lining a wellbore Method and apparatus for drilling and lining a wellbore

E - Fixed Constructions

21

B

E21B 7/20 (2006.01) E21B 43/10 (2006.01) E21B 10/64 (2006.01)

Patent

CA 2686423

A drilling method comprises: mounting a drill t)it on a drill string including a section of expandable tubing; providing a tubing expander in the string; rotating the drill bit and advancing the drill string through a bore; locating the expandable tubing in the bore; passing the expander through the expandable tubing to expand the tubing; and retrieving the drill bit from the bore, through the expanded tubing.

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