Method and apparatus for plasma blasting

Details Method and apparatus for plasma blasting Method and apparatus for plasma blasting

E - Fixed Constructions

21

C

E21C 37/18 (2006.01) E21B 7/15 (2006.01) F42D 3/00 (2006.01)

Patent

CA 2180661

Method and apparatus for plasma blasting (10) comprises a capacitor bank (28) for storing electrical charge to which is coupled an inductance (60) which delivers the electric charge as a current through a switch to an explodable conductor (16) comprising a portion of a probe (14). The explodable conductor (16) is a ribbon helically wound around a cylindrical mandril (108), the ribbon having a given length to cross section ratio of the inductance to the capacitance in order to ensure efficient dissipation of an optimal amount of the electrical energy stored in the capacitance.

Procédé et appareil de sautage au plasma (10) comportant un banc de condensateurs (28) emmagasinant une charge électrique auquel est couplée une inductance (60) qui transfère à l'aide d'un commutateur la charge électrique sous forme de courant vers un conducteur explosif (16) formant une partie d'une sonde (14). Le conducteur explosif (16) consiste en un ruban enroulé en hélice autour d'un tube cylindrique (108) présentant un rapport longueur/section proportionnel à la racine carrée du rapport de l'inductance à la capacité, de façon à assurer une dissipation efficace d'une quantité optimale de l'énergie électrique emmagasinée dans les condensateurs.

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