Boring or penetrating the earth – Processes
Reexamination Certificate
2006-05-02
2006-05-02
Neuder, William (Department: 3672)
Boring or penetrating the earth
Processes
C175S296000, C175S406000
Reexamination Certificate
active
07036611
ABSTRACT:
An expandable reamer apparatus and methods for reaming a borehole, wherein a laterally movable blade carried by a tubular body may be selectively positioned at an inward position and an expanded position. The laterally movable blade, held inwardly by blade-biasing elements, may be forced outwardly by drilling fluid selectively allowed to communicate therewith by way of an actuation sleeve disposed within the tubular body. Alternatively, a separation element may transmit force or pressure from the drilling fluid to the movable blade. Further, a chamber in communication with the movable blade may be pressurized by way of a downhole turbine or pump. A ridged seal wiper, compensator, movable bearing pad, fixed bearing pad preceding the movable blade, or an adjustable spacer element to alter expanded blade position may be included within the expandable reamer. In addition, a drilling fluid pressure response indicating an operational characteristic of the expandable reamer may be generated.
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The Andergauge Anderreamer and Security DBS NBR, A Differentiation Between Tools, Andergauge Drilling Systems, www.andergauge.com.
Anderreamer Reliable Underreaming Below Casing, Andergauge Drilling Systems, www.andergauge.com.
Gautam Anurag
Ireland Kelly D.
Laing Robert A.
Mumma Matthew D.
Pritchard Daryl L.
Baker Hughes Incorporated
Neuder William
TraskBritt
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