Drill bit

Details Drill bit Drill bit

2007-03-27

2007-03-27

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

Cutter element laterally shiftable below ground

C175S269000, C175S287000, C175S342000, C175S353000

Reexamination Certificate

active

10276089

ABSTRACT:
An expandable drill bit comprises a body for mounting on a support string and two roller cutters mounted on the body. The cutters are movable between a smaller diameter first configuration and a larger diameter second configuration. In one embodiment the bit is adapted to drill with the cutters in both the first and second configurations.

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