BOREHOLE EQUIPMENT FUSE Russian patent published in 2006 - IPC E21B43/1185 

FIELD: mining, particularly perforating equipment.

SUBSTANCE: fuse comprises body with adapter in which percussion mechanism and mechanical high-explosive based detonating device are arranged. Percussion mechanism body is connected to mechanical detonating device. Mechanical detonation device body is provided with radial orifices filled with fusible alloy having melting temperature less than high-explosive explosion temperature. Mechanical detonation device additionally has metal bush arranged so that radial orifices of mechanical device installed in the metal bush are arranged outside the metal bush. Bead is created on inner surface of the fuse. Shoulder is made on percussion mechanism body to press percussion mechanism to fuse bead so that percussion mechanism may move along with mechanical detonation device to align percussion mechanism body flange with adapter end and to install mechanical detonation device in the metal bush so that radial orifices formed in mechanical detonation device are located inside the bush.

EFFECT: increased operational reliability of the fuse.

1 dwg