Boring or penetrating the earth – Bit or bit element – Casing shoe type
Reexamination Certificate
2006-09-05
2006-09-05
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Casing shoe type
C175S268000, C166S242800
Reexamination Certificate
active
07100713
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.
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Bagnell David
Collins Giovanna M.
Patterson & Sheridan LLP
Weatherford / Lamb, Inc.
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