Method and apparatus for isolating and testing zones during reverse circulation drilling

Abstract: An isolation tool for use with a concentric drill string for isolating a zone in a wellbore for testing is provided comprising a center tube and an outer casing forming an annular conduit therebetween and an expandable and contractible packer for sealing off an outside annular passage formed between a wall of the wellbore and an outer surface of the concentric drill string, whereby the isolation tool is adapted to be operably connected to the concentric drill string such that the isolation tool is in fluid communication with the concentric drill string. (end of abstract)

Agent: Bennett Jones C/o Ms Roseann Caldwell - Calgary, AB, CA
Inventor: JAMES I. LIVINGSTONE
USPTO Applicaton #: #20080099195 - Class: 166119000 (USPTO)
Related Patent Categories: Wells, Packers Or Plugs, With Expanding Anchor, Relatively Movable Packers Or Plugs

Method and apparatus for isolating and testing zones during reverse circulation drilling description/claims

The Patent Description & Claims data below is from USPTO Patent Application 20080099195, Method and apparatus for isolating and testing zones during reverse circulation drilling.

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