Emergency cutting apparatus and method

Details Emergency cutting apparatus and method Emergency cutting apparatus and method

2006-02-14

2006-02-14

Bagnell, David (Department: 3672)

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

C166S054600

Reexamination Certificate

active

06997262

ABSTRACT:
A method and apparatus for cutting one or more longitudinal members, external to a downhole tubular conduit, by pulling upward on a cutter body attached to the tubular conduit, where the longitudinal members are run between cutter knives within the cutter body. The cutter knives are attached to one external longitudinal member. After the main tubular conduit is cut below the cutter body, the tubular conduit is pulled, lifting the cutter body, thereby engaging the cutter knives with sloping surfaces on the cutter body to force the knives together, severing the external longitudinal members.

REFERENCES:
patent: 1491610 (1924-04-01), Liady
patent: 1776026 (1930-09-01), Hinderliter
patent: 2495953 (1950-01-01), Austin
patent: 4817725 (1989-04-01), Jenkins
patent: 4945985 (1990-08-01), Lynds
patent: 4981177 (1991-01-01), Carmody et al.
patent: 5720348 (1998-02-01), Hisaw
patent: 6296053 (2001-10-01), Hansen
patent: 2001/0045283 (2001-11-01), Leismer
patent: WO 02/090710 (2002-11-01), None

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