Expandable drilling tool and method

Details Expandable drilling tool and method Expandable drilling tool and method

2007-03-27

2007-03-27

Gay, Jennifer H. (Department: 3672)

Boring or penetrating the earth

Processes

C175S266000, C175S271000, C175S269000, C175S291000, C175S406000

Reexamination Certificate

active

10479475

ABSTRACT:
A system is provided (1) for increasing the diameter of at least a portion of a well bore, the system being intended to be attached to a drill pipe (3), the system having a support element (10) bearing cutting arms (13, 14) which is movably mounted with respect to a body (4) and wherein the arms and the chamber (6) of the body (4) are designed so as to cooperated. A method is also provided for increasing the diameter of at least a portion of a well bore by drilling.

REFERENCES:
patent: 2719700 (1955-10-01), Kammerer
patent: 3171503 (1965-03-01), Shirley
patent: 4589504 (1986-05-01), Simpson
patent: 5253714 (1993-10-01), Davis et al.
patent: 5385205 (1995-01-01), Hailey
patent: 2004/0084183 (2004-05-01), Zupanick
patent: WO 01/29364 (2001-04-01), None

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