DETONATING FUSE FOR BLASTING-PERFORATION EQUIPMENT Russian patent published in 2013 - IPC E21B43/1185 

FIELD: oil and gas industry.

SUBSTANCE: detonating fuse includes a housing with a reducer, inside which there arranged is a mechanical detonating device (MDD) based on a high explosive agent and a trigger mechanism including a housing and a shell and a stock, which are fixed relative to it, with possibility of moving the shell and releasing the stock when the detonating fuse is being activates; at that, between the trigger mechanism and MDD there additionally installed is an impact safety mechanism that is attached to them and that includes a housing, with a striker fixed in it, a slide made in the form of a shell enclosing the housing with the striker, and a spring arranged between the slide bottom and the striker, with possibility of the slide movement, compression of the spring and release of the striker at movement of the stock.

EFFECT: improving detonating fuse activation reliability.

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