Abstract: An initiator head may include a housing extending in an axial direction, a circuit board provided in an interior space of the housing, a line-in terminal provided on a first side of the housing in the axial direction and accessible from an exterior of the housing, and a fuse displaced from the circuit board in the axial direction. A thickness direction of the circuit board may be substantially parallel with the axial direction. The line-in terminal may be in electrical communication with the circuit board. The fuse may be in electrical communication with the circuit board. The circuit board may be configured to activate the fuse in response to a control signal received at the line-in terminal.

Abstract: A detonator includes a detonating capsule, a detonator head storing an electronic circuit board, and a retaining arm configured to fix the detonating capsule to the detonator head. The electronic circuit board is a multidimensional circuit board that extends from the detonator head into engagement with the detonating capsule.

Abstract: A control module for use with a plurality of wellbore tools may include a power source and a logic circuit operably coupled to the power source. The logic circuit may be operably coupled to the plurality of wellbore tools through a topmost wellbore tool of the plurality of wellbore tools. The logic circuit may be configured to, in response to an initiation condition and for each wellbore tool of the plurality of wellbore tools in a sequential order from a bottommost wellbore tool to the topmost wellbore tool, determine whether the wellbore tool is a responsive wellbore tool or a non-responsive wellbore tool. In response to a determination that the wellbore tool is a responsive wellbore tool, the logic circuit may initiate the wellbore tool. In response to a determination that the wellbore tool is a non-responsive wellbore tool, the logic circuit may skip initiation of the wellbore tool.

Abstract: An electronic ignition circuit may include a logic circuit and an ignition circuit electrically coupled to the logic circuit. The logic circuit may include a microcontroller and a switching circuit configured to switch from a first detonator or igniter to a second detonator or igniter in response to a signal from the microcontroller. The ignition circuit may include a capacitor discharging circuit configured to discharge a firing capacitor through a fuse head. The capacitor discharging circuit may include an ignition switch configured to remain actively closed after the firing capacitor is discharged through the fuse head.

Abstract: An electronic ignition circuit for use with a fuse head may include a microcontroller, a firing capacitor operably coupled to the fuse head, a voltage measuring circuit operably coupled to the microcontroller and configured to measure a voltage across the firing capacitor, and a switch operably coupled to the microcontroller, the switch being provided in series with the fuse head and a ground. The microcontroller may be configured control the voltage measuring circuit to measure a first voltage across the firing capacitor, actuate the switch to discharge the firing capacitor across the fuse head in response to a firing signal, control the voltage measuring circuit to measure a second voltage across the firing capacitor, and output a shot detection signal based on the first voltage and the second voltage.

Abstract: An initiator head may include a housing extending in an axial direction, a circuit board provided in an interior space of the housing, a line-in terminal provided on a first side of the housing in the axial direction and accessible from an exterior of the housing, and a fuse displaced from the circuit board in the axial direction. A thickness direction of the circuit board may be substantially parallel with the axial direction. The line-in terminal may be in electrical communication with the circuit board. The fuse may be in electrical communication with the circuit board. The circuit board may be configured to activate the fuse in response to a control signal received at the line-in terminal.

Abstract: An electronic initiation system for use with a firing panel may include an input connector, a plurality of electronic ignition circuits (EICs) operably coupled together in series, and an indicator operably coupled to an output of each EIC of the plurality of EICs. A first EIC of the plurality of EICs may be operably coupled to the input connector. The indicator is configured to generate an indication in response to an output of an EIC of the plurality of EICs satisfying a predetermined condition.

Abstract: An electronic ignition circuit for use with a fuse head may include a microcontroller, a firing capacitor operably coupled to the fuse head, a voltage measuring circuit operably coupled to the microcontroller and configured to measure a voltage across the firing capacitor, and a switch operably coupled to the microcontroller, the switch being provided in series with the fuse head and a ground. The microcontroller may be configured control the voltage measuring circuit to measure a first voltage across the firing capacitor, actuate the switch to discharge the firing capacitor across the fuse head in response to a firing signal, control the voltage measuring circuit to measure a second voltage across the firing capacitor, and output a shot detection signal based on the first voltage and the second voltage.

Abstract: An electronic ignition circuit for use with a fuse head may include a microcontroller; a firing capacitor operably coupled to the fuse head; a voltage measuring circuit operably coupled to the microcontroller and configured to measure a voltage across the firing capacitor; and a switch operably coupled to the microcontroller, the switch being provided in series with the fuse head and a ground. The microcontroller may be configured control the voltage measuring circuit to measure a first voltage across the firing capacitor; actuate the switch to discharge the firing capacitor across the fuse head in response to a firing signal; control the voltage measuring circuit to measure a second voltage across the firing capacitor; and output a shot detection signal based on the first voltage and the second voltage.

Abstract: An autonomous logging drone tool-string including a wiper plug at a downstream end, a logging tool, and a detachable transmitter capsule, and associated methods for cementing a wellbore and logging wellbore information in a single tool-string run downhole. In an aspect, the logging drone tool-string may include a perforating gun and associated methods may include perforating a toe end of the wellbore casing and surrounding cement. In an aspect, the transmitter capsule stores wellbore information from the logging tool. The transmitter capsule may be detached, pumped to the surface, and retrieved for accessing the stored wellbore information.

Abstract: An electronic initiation system for use with a firing panel may include an input connector, a plurality of electronic ignition circuits (EICs) operably coupled together in series, and an indicator operably coupled to an output of each EIC of the plurality of EICs. A first EIC of the plurality of EICs may be operably coupled to the input connector. The indicator is configured to generate an indication in response to an output of an EIC of the plurality of EICs satisfying a predetermined condition.

Abstract: A system and a method of providing a reliable and consistent time delay in an oil and gas exploration/recovery device inserted in a bore hole is presented. The reliability and consistency of the time delay is a result of the use of electronic circuitry in determining the length of time delay. The system and method presented provide a time delay unit that is modular/commoditized, facilitating quick and easy integration of each component of the time delay unit in the field. Further, assembly and disassembly of the time delay unit is easily accomplished in the field and may be designed to operate with standard percussion and detonation elements.

Abstract: A system and a method of providing a reliable and consistent time delay in an oil and gas exploration/recovery device inserted in a bore hole is presented. The reliability and consistency of the time delay is a result of the use of electronic circuitry in determining the length of time delay. The system and method presented provide a time delay unit that is modular/commoditized, facilitating quick and easy integration of each component of the time delay unit in the field. Further, assembly and disassembly of the time delay unit is easily accomplished in the field and may be designed to operate with standard percussion and detonation elements.

Abstract: An electronic ignition circuit for use with a fuse head may include a microcontroller; a firing capacitor operably coupled to the fuse head; a voltage measuring circuit operably coupled to the microcontroller and configured to measure a voltage across the firing capacitor; and a switch operably coupled to the microcontroller, the switch being provided in series with the fuse head and a ground. The microcontroller may be configured control the voltage measuring circuit to measure a first voltage across the firing capacitor; actuate the switch to discharge the firing capacitor across the fuse head in response to a firing signal; control the voltage measuring circuit to measure a second voltage across the firing capacitor; and output a shot detection signal based on the first voltage and the second voltage.

Abstract: The present disclosure describes an electronic ignition circuit (“EIC”) for controlling at least one detonator. The EIC may include a protection circuit, an input circuit coupled to the protection circuit, a logic circuit electrically coupled to the input circuit, and an ignition circuit electrically coupled to the logic circuit. The protection circuit may include at least one of a fuse, a circuit breaker and an automatic switch. The logic circuit may include an answer back circuit, and a switching circuit adapted to switch to the next detonator or igniter. The ignition circuit may include a capacitor charging circuit, a capacitor discharge circuit to discharge a firing capacitor through a fuse head, and a shot detection circuit adapted to measure a voltage across the firing capacitor before discharging through the fuse head and to measure a voltage after discharging through the fuse head.

Abstract: The present disclosure describes an electronic ignition circuit (“EIC”) for controlling at least one detonator. The EIC may include a protection circuit, an input circuit coupled to the protection circuit, a logic circuit electrically coupled to the input circuit, and an ignition circuit electrically coupled to the logic circuit. The protection circuit may include at least one of a fuse, a circuit breaker and an automatic switch. The logic circuit may include an answer back circuit, and a switching circuit adapted to switch to the next detonator or igniter. The ignition circuit may include a capacitor charging circuit, a capacitor discharge circuit to discharge a firing capacitor through a fuse head, and a shot detection circuit adapted to measure a voltage across the firing capacitor before discharging through the fuse head and to measure a voltage after discharging through the fuse head.

Abstract: The present disclosure describes an electronic ignition circuit (“EIC”) for controlling at least one detonator. The EIC may include a protection circuit, an input circuit coupled to the protection circuit, a logical circuit electrically coupled to the input circuit, and an ignition circuit electrically coupled to the logical circuit. The protection circuit may include at least one of a fuse, a circuit breaker and an automatic switch. The logical circuit may include an answer back circuit, and a switching circuit adapted to switch to the next detonator or igniter. The ignition circuit may include a capacitor charging circuit, a capacitor discharge circuit to discharge a firing capacitor through a fuse head, and a shot detection circuit adapted to measure a voltage across the firing capacitor before discharging through the fuse head and to measure a voltage after discharging through the fuse head.