Boring or penetrating the earth – Processes
Reexamination Certificate
2006-01-31
2006-01-31
Neuder, William (Department: 3672)
Boring or penetrating the earth
Processes
C175S267000
Reexamination Certificate
active
06991046
ABSTRACT:
An expandable eccentric reamer for placement in a drill string up-hole of a conventional drill bit. The reamer blade is actuated by drilling fluid pressure to radially extend to a drill out diameter greater than a pass-through diameter. The reamer body is shaped to have an eccentric outer surface configuration to accommodate the reamer blade therein. The reamer blade acts as a piston arm in response to drilling fluid pressure and moves along a shaft anchored in a hump region that forms an eccentricity in the outer surface configuration of the body. The reamer blade has an outer edge configuration that positions the cutters thereon to prevent them from engaging a casing of a well borehole upon deployment.
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Fielder Coy M.
Herben William C.
Silva Rogerio H.
Wells Gary D.
Daly Jeffery E.
Neuder William
ReedHycalog, L.P.
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