Title:
EXPANDABLE REAMERS FOR EARTH-BORING APPLICATIONS AND METHODS OF USING THE SAME
Document Type and Number:
WIPO Patent Application WO2008070038
Kind Code:
B1
Abstract:
Expandable reamer tools include an outer body (16), a fluid passageway (17) extending through the outer body, and at least one blade (40) configured to slide relative to the outer body between a retracted position and an expanded position in a direction oriented at an acute angle of less than ninety degrees (90-) to a longitudinal axis of the outer body. In some embodiments, the tools may include a moveable inner sleeve member (30) configured to selectively allow hydraulic fluid pressure within the fluid passageway to act directly on the at least one blade (40). Methods for enlarging a borehole using such expandable reamer tools and methods for removing such expandable reamer tools from a borehole are also disclosed.
Inventors:
RADFORD STEVEN R (US)
SHU SCOTT S (US)
SHALE LES T (US)
MORRIS MARK E (US)
KIZZIAR MARK R (US)
ZAHRADNIK ANTON F (US)
SHU SCOTT S (US)
SHALE LES T (US)
MORRIS MARK E (US)
KIZZIAR MARK R (US)
ZAHRADNIK ANTON F (US)
Application Number:
PCT/US2007/024766
Publication Date:
July 24, 2008
Filing Date:
December 03, 2007
Export Citation:
Assignee:
BAKER HUGHES INC (US)
RADFORD STEVEN R (US)
SHU SCOTT S (US)
SHALE LES T (US)
MORRIS MARK E (US)
KIZZIAR MARK R (US)
ZAHRADNIK ANTON F (US)
RADFORD STEVEN R (US)
SHU SCOTT S (US)
SHALE LES T (US)
MORRIS MARK E (US)
KIZZIAR MARK R (US)
ZAHRADNIK ANTON F (US)
International Classes:
E21B10/32; E21B7/28; E21B17/10
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