Patent Number: 7,100,713

Title: Expandable apparatus for drift and reaming borehole

Abstract: An expandable reamer shoe is provided for use with expandable casing in a borehole. The reamer shoe has a number of reaming members in the form of blades which remain closed against the body of the shoe when inserted through casing, and can then be expanded to underream below the casing. Additionally, the expandable reamer shoe is made substantially of a drillable material so that the borehole can be extended beyond the point reached by the expandable reamer shoe.

Inventors: Tulloch; Rory McCrae (Aberdeen, GB)

Assignee: Weatherford/Lamb, Inc.

International Classification: E21B 17/14 (20060101); E21B 10/32 (20060101)

Expiration Date: 9/05/02018