A downhole explosive detonation comprises a high voltage electro-explosive initiator comprising an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. Explosive is initiated in a direction approximately parallel, or in another version perpendicular to the capacitor discharge unit. A unique configuration and construction of the assembly allows installation through a small service port in the gun housing structure for more efficient gun arming. A real time downhole voltage monitoring is described that transmits voltage readings to the surface during a firing sequence.

A downhole explosive detonation comprises a high voltage electro-explosive initiator comprising an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. Explosive is initiated in a direction approximately parallel, or in another version perpendicular to the capacitor discharge unit. A unique configuration and construction of the assembly allows installation through a small service port in the gun housing structure for more efficient gun arming. A real time downhole voltage monitoring is described that transmits voltage readings to the surface during a firing sequence.

An initiator assembly that includes a header body, a frame member, a plurality of terminals, an initiator chip, a plurality of contacts, and a support member. The frame member is coupled to the header body and defines an interior aperture. The terminals are received through the header body and the frame member. The initiator chip is received in the frame member and has a plurality of lands, a conductive bridge and a flyer that is disposed over the conductive bridge. Each of the contacts is soldered to an associated one of the terminals and an associated one of the lands. The support member is formed of plastic and encapsulates the frame member, the plurality of contacts, and a portion of the initiator chip. The support member forms a barrel aperture over the flyer. The input charge is formed of a secondary explosive and is disposed in-line with the barrel aperture.

An initiator assembly that includes a header body, a frame member, a plurality of terminals, an initiator chip, a plurality of contacts, and a support member. The frame member is coupled to the header body and defines an interior aperture. The terminals are received through the header body and the frame member. The initiator chip is received in the frame member and has a plurality of lands, a conductive bridge and a flyer that is disposed over the conductive bridge. Each of the contacts is soldered to an associated one of the terminals and an associated one of the lands. The support member is formed of plastic and encapsulates the frame member, the plurality of contacts, and a portion of the initiator chip. The support member forms a barrel aperture over the flyer. The input charge is formed of a secondary explosive and is disposed in-line with the barrel aperture.

An initiator system with a first initiator device, which has a first initiator and a first charge, and a second initiator device that has a second initiator and a second charge. At least a portion of the second charge is isolated from the first initiator device such that operation of the first initiator will not cause the isolated portion of the second charge to detonate, deflagrate or combust.

An initiator system with a first initiator device, which has a first initiator and a first charge, and a second initiator device that has a second initiator and a second charge. At least a portion of the second charge is isolated from the first initiator device such that operation of the first initiator will not cause the isolated portion of the second charge to detonate, deflagrate or combust.

A downhole explosive detonation assembly with a high voltage electro-explosive initiator having an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. The explosive detonation assembly is adapted to detonate detonating cord from the side.

A downhole explosive detonation assembly with a high voltage electro-explosive initiator having an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. The explosive detonation assembly is adapted to detonate detonating cord from the side.

A detonator for an explosive material is described. The detonator includes a semiconductor bridge, coupled with the explosive material, including thermal feedback mechanism is provided via one or more thermistors. An exemplary mechanism includes a semiconductor bridge with a polysilicon resistor and a pair of thermistors. The two thermistors are disposed to be substantially close to or sandwich the polysilicon resistor. When the temperature surrounding the polysilicon resistor is getting upwards, the temperature surrounding the thermistors is equally going up. When the temperature reaches a critical point, but below the threshold of the polysilicon resistor, the resistance of the thermistors drops suddenly or drastically, causing the current driving up the temperature of the polysilicon resistor to divert through the VOX temp resistors. Subsequently the current going through the polysilicon resistor is reduced, causing the temperature to drop downwards.

A detonator for an explosive material is described. The detonator includes a semiconductor bridge, coupled with the explosive material, including thermal feedback mechanism is provided via one or more thermistors. An exemplary mechanism includes a semiconductor bridge with a polysilicon resistor and a pair of thermistors. The two thermistors are disposed to be substantially close to or sandwich the polysilicon resistor. When the temperature surrounding the polysilicon resistor is getting upwards, the temperature surrounding the thermistors is equally going up. When the temperature reaches a critical point, but below the threshold of the polysilicon resistor, the resistance of the thermistors drops suddenly or drastically, causing the current driving up the temperature of the polysilicon resistor to divert through the VOX temp resistors. Subsequently the current going through the polysilicon resistor is reduced, causing the temperature to drop downwards.