Method and apparatus for severing a tubular

Details Method and apparatus for severing a tubular Method and apparatus for severing a tubular

1997-10-21

2000-04-25

Lillis, Eileen Dunn

Wells

Processes

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

166 551, 166 63, 166299, E21B 2902

Patent

active

060532475

ABSTRACT:
An apparatus and method for severing a tubular, such as a drill string, which is stuck within a subterranean well bore. A volume of liquid explosive is positioned within a housing and initially restrained against movement therein. The housing is lowered within the tubular and positioned at a location where the tubular is to be severed. The volume of liquid explosive is then moved into closer proximity to the tubular and detonated thereby severing the tubular. A portion of the tubular is then removed from the well bore.

REFERENCES:
patent: 3948176 (1976-04-01), Koomen
patent: 5513570 (1996-05-01), Mulcahy

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