DEVICE FOR DETONATION INITIATION IN BOREHOLE PERFORATOR Russian patent published in 2006 - IPC E21B43/1185 

FIELD: well perforation equipment, particularly mechanical firing mechanisms.

SUBSTANCE: device in accordance with the first embodiment comprises adapter connected to body and striker mechanism with head detonation means arranged in the body. The striker mechanism is made as guiding bush with striker retainer unit. Striker retaining members correspondingly cooperate with striker through grooves formed on outer surface thereof and with bush having slots for retaining members passing. The adapter has side orifices to open well fluid flow in production string and calibration orifice for initiation rod adjusting. The initiation rod cooperates with bush and striker by hollow head and inner rest correspondingly. In accordance with the second embodiment initiation rod cooperates with bush by hollow head and striker movement along inner surface of guiding bush is defined by striker mass and well pressure.

EFFECT: increased operational safety and extended operational range.

2 cl, 1 dwg