Methods, apparatus and pyrotechnic compositions for severing con

Details Methods, apparatus and pyrotechnic compositions for severing con Methods, apparatus and pyrotechnic compositions for severing con

1980-10-03

1982-10-05

Novosad, Stephen J.

Wells

Processes

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

149 44, 166 55, E21B 2902

Patent

active

043523978

ABSTRACT:
Methods of severing conduits along planes extending transversely to the axis thereof comprising confining a fuel composition within a fuel chamber in an elongated housing sized for insertion in a conduit, the housing including a plurality of spaced radially extending discharge nozzles communicated with the fuel chamber and positioned to direct fuel reaction products in directions transverse to the axis of the housing, positioning the housing inside a conduit to be severed and igniting the fuel composition confined in the fuel chamber so that reaction products formed therefrom exit the housing by way of the discharge nozzles and impact the conduit thereby severing the conduit. Apparatus and pyrotechnic fuel compositions are also provided.

REFERENCES:
patent: 2144208 (1939-01-01), Van Meter
patent: 2918125 (1959-12-01), Sweetman
patent: 3076507 (1963-02-01), Sweetman
patent: 3318395 (1967-05-01), Messmer
patent: 3695951 (1972-10-01), Helms et al.
patent: 3713636 (1973-01-01), Helms et al.
patent: 3727685 (1973-04-01), Chesnut et al.
patent: 4019932 (1977-04-01), Schroeder
patent: 4125161 (1978-11-01), Chammas
patent: 4140188 (1979-02-01), Vann
patent: 4158389 (1979-06-01), Chammas et al.

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