Abandoning offshore well

Details Abandoning offshore well Abandoning offshore well

1986-06-20

1987-08-25

Novosad, Stephen J.

Wells

Submerged well

With provision for disassembly

166297, E21B 4311

Patent

active

046886400

ABSTRACT:
A method and apparatus for abandoning an offshore oil or gas well drilled into the ocean floor having a plurality of concentric strings of pipe having throughbores and spaced to form an annular space between adjacent pipe strings. The invention includes perforating the pipe string with an explosive charge of a size, composition, and velocity so as to only penetrate one pipe string without damaging or penetrating any other pipe string in the well.

REFERENCES:
patent: Re25298 (1962-12-01), Bielstein
patent: 2796023 (1957-06-01), Abendroth
patent: 3064571 (1962-11-01), True
patent: 3110257 (1963-11-01), Lebourg
patent: 3268016 (1966-08-01), Bell
patent: 3366188 (1968-01-01), Hicks
patent: 3666009 (1972-05-01), Stone
patent: 4498541 (1985-02-01), Brieger et al.

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