Method and apparatus for perforating or cutting with a solid fue

Details Method and apparatus for perforating or cutting with a solid fue Method and apparatus for perforating or cutting with a solid fue

1983-01-13

1984-05-08

Novosad, Stephen J.

Wells

Processes

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

166300, 166 55, E21B 2902

Patent

active

044469209

ABSTRACT:
A method for cutting pipe casings and concrete liners or perforating the same and localized portions of surrounding strata in an earth bore is set forth wherein a gas phase cutting or perforating jet mixture of fluorine and nitrogen trifluoride is delivered to the cutting or perforation site from the decomposition of a solid, normally stable, perfluoroammonium salt. An appropriate apparatus for delivering the gas mixture of fluorine and nitrogen trifluoride from the salt is also disclosed.

REFERENCES:
patent: 2421649 (1947-06-01), Priest et al.
patent: 2642656 (1953-06-01), Grosse
patent: 2918125 (1959-12-01), Sweetman
patent: 3066058 (1962-11-01), Gall
patent: 3071852 (1963-01-01), Rogers
patent: 3076507 (1963-02-01), Sweetman
patent: 3128824 (1964-04-01), Gall
patent: 3450203 (1969-06-01), Patron et al.
patent: 4352397 (1982-10-01), Christopher
Production Operations, vol. 1, Chapter 7, Perforating Oil and Gas Wells, pp. 187-202.

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