Expandable reamer

Details Expandable reamer Expandable reamer

2006-08-07

2010-11-02

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

Cutter element laterally shiftable below ground

Cutter element shifted by fluid pressure

C175S278000, C175S289000

Reexamination Certificate

active

07823663

ABSTRACT:
A downhole apparatus comprises a body, extendable members mounted on the body and being movable between retracted and extended configurations, and a remotely operable retaining arrangement for maintaining the extendable members in the retracted configuration. The extendable members may be cutters, such that the apparatus may be a cutting apparatus, such as a reamer. An operator may control the apparatus to retain the cutting members in the retracted configuration, or prevent the extension of the cutting members.

REFERENCES:
patent: 904344 (1908-11-01), Mapes
patent: 1485642 (1924-03-01), Stone
patent: 1810201 (1931-06-01), Campbell
patent: 3433313 (1969-03-01), Brown
patent: 4889197 (1989-12-01), Boe
patent: 5368114 (1994-11-01), Tandberg et al.
patent: 7252163 (2007-08-01), Ollerenshaw et al.
patent: 2004/0222022 (2004-11-01), Nevlud et al.
patent: 2007/0089912 (2007-04-01), Eddison et al.
patent: WO2004/097163 (2004-11-01), None
patent: WO2005/103435 (2005-11-01), None

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