INITIATION OF EXPLOSIVE DEVICES

摘要

A perforating gun (15) or other downhole tool includes one or more explosive devices (20) that are activable by corresponding one or more initiator devic es (21), such as capacitor discharge units (CDUs). Each CDU (21) includes an explosive foil initiator (EFI) (22) or some other type of a high-energy brid ge- type initiator, an energy source (18) (e.g., a slapper capacitor), and a switch (62) coupling the energy source (18) and the EFI (22) or other bridge - type initiator. An electrical cable (17) is coupled to the CDUs (21) for providing a voltage to energize the energy source (18) in the CDUs (21) to provide energy to each EFI (22). In response to activation of a trigger sign al down the electrical cable (17), the switch (62) is closed to couple the ener gy source (18) to the EFI (22).