An explosive system for fracturing an underground geologic formation adjacent to a wellbore can comprise a plurality of explosive units comprising an explosive material contained within the casing, and detonation control modules electrically coupled to the plurality of explosive units and configured to cause a power pulse to be transmitted to at least one detonator of at least one of the plurality of explosive units for detonation of the explosive material. The explosive units are configured to be positioned within a wellbore in spaced apart positions relative to one another along a string with the detonation control modules positioned adjacent to the plurality of explosive units in the wellbore, such that the axial positions of the explosive units relative to the wellbore are at least partially based on geologic properties of the geologic formation adjacent the wellbore.

An explosive system for fracturing an underground geologic formation adjacent to a wellbore can comprise a plurality of explosive units comprising an explosive material contained within the casing, and detonation control modules electrically coupled to the plurality of explosive units and configured to cause a power pulse to be transmitted to at least one detonator of at least one of the plurality of explosive units for detonation of the explosive material. The explosive units are configured to be positioned within a wellbore in spaced apart positions relative to one another along a string with the detonation control modules positioned adjacent to the plurality of explosive units in the wellbore, such that the axial positions of the explosive units relative to the wellbore are at least partially based on geologic properties of the geologic formation adjacent the wellbore.

A networked electronic ordnance system is provided. The system includes a first plurality of pyrotechnic devices connected to a first network bus. The system further includes a first bus controller connected to the first network bus. The system further includes a second plurality of pyrotechnic devices connected to a second network bus. The system further includes a second bus controller connected to the second network bus. The system further includes a bus interface circuit connected to the first bus controller by a first electrical connection and connected to the second bus controller by a second electrical connection.

A networked electronic ordnance system is provided. The system includes a first plurality of pyrotechnic devices connected to a first network bus. The system further includes a first bus controller connected to the first network bus. The system further includes a second plurality of pyrotechnic devices connected to a second network bus. The system further includes a second bus controller connected to the second network bus. The system further includes a bus interface circuit connected to the first bus controller by a first electrical connection and connected to the second bus controller by a second electrical connection.

An igniter for a burner in a cooking system. The igniter comprises a spark unit including two electrodes that define a spark gap, a spark module electrically connected to the electrodes to apply a high-voltage pulse across the electrodes to generate a spark in the spark gap, and a remote sending unit that sends an ignite signal to the spark module to generate a spark in the spark gap to light the burner. A local ignite signal can be initiated from the spark module. The spark module and the remote sending unit can be clamped to a gas hose supplying gas to the burner. The spark unit can be attached to a variety of burners by attachments to position the spark gap in the burner's gas flow. A single-electrode igniter is also described.

An igniter for a burner in a cooking system. The igniter comprises a spark unit including two electrodes that define a spark gap, a spark module electrically connected to the electrodes to apply a high-voltage pulse across the electrodes to generate a spark in the spark gap, and a remote sending unit that sends an ignite signal to the spark module to generate a spark in the spark gap to light the burner. A local ignite signal can be initiated from the spark module. The spark module and the remote sending unit can be clamped to a gas hose supplying gas to the burner. The spark unit can be attached to a variety of burners by attachments to position the spark gap in the burner's gas flow. A single-electrode igniter is also described.

Described herein are methods and systems for using pyrophoric liquids to ignite combustible gas.

An explosive assembly includes a first explosive unit having a first longitudinal end portion having a first mechanical coupling feature, a second explosive unit having a second longitudinal end portion having a second mechanical coupling feature, and a tubular connector having a first end portion mechanically coupled to the first mechanical coupling feature and a second end portion mechanically coupled to the second mechanical coupling feature, such that the first explosive unit, the connector, and the second explosive unit are connected together end-to-end along a common longitudinal axis. Each explosive unit can contain a high explosive material and a detonator, and the connector can comprise a detonation control module electrically coupled to the detonators and configured to detonate the explosive units.

An explosive assembly includes a first explosive unit having a first longitudinal end portion having a first mechanical coupling feature, a second explosive unit having a second longitudinal end portion having a second mechanical coupling feature, and a tubular connector having a first end portion mechanically coupled to the first mechanical coupling feature and a second end portion mechanically coupled to the second mechanical coupling feature, such that the first explosive unit, the connector, and the second explosive unit are connected together end-to-end along a common longitudinal axis. Each explosive unit can contain a high explosive material and a detonator, and the connector can comprise a detonation control module electrically coupled to the detonators and configured to detonate the explosive units.

Systems, methods, and devices for transmitting and controlling ignition output of a controller having a power source, a programmable interface, a wireless transmission module, and an ignition output unit are disclosed.