Method of abandoning a well and apparatus therefor

Details Method of abandoning a well and apparatus therefor Method of abandoning a well and apparatus therefor

1994-06-17

1995-12-05

Buiz, Michael Powell

Wells

Processes

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

E21B 4300

Patent

active

054720524

ABSTRACT:
The invention relates to a method of abandoning a well which has ceased to provide economic use. The method includes pressurizing the well fluids through the production tubing including optionally additional adjacent annular channels to force them back into the reservoir by means of a gaseous medium such as nitrogen. Then sealing the production tubing and optional annular channels with a suitable seal. Draining the remaining channels by perforation into the void in the production tubing and optional channels formed by the gaseous medium. Followed by a final sealing of the whole well.

REFERENCES:
patent: 4339000 (1982-07-01), Cronmiller
patent: 4510999 (1985-04-01), George et al.
patent: 4688640 (1987-08-01), Pritchard

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