Rotatable drill shoe

Boring or penetrating the earth – Processes

Reexamination Certificate

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Details

C175S101000, C175S321000, C175S171000

Reexamination Certificate

active

10799790

ABSTRACT:
A rotatable drilling shoe attachable to a section of casing that allows for drilling and casing of a well bore in a single trip. The drilling shoe includes a fixed section and a rotatable section that has a drillable bit attached thereto. The drilling shoe further includes a mechanism for inhibiting rotation of the rotatable section after the casing is cemented into place so that the drillable bit can be drilled out by a subsequent drilling operation.

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