Sep 8, 2026
A compact encapsulated initiator assembly includes an initiator chip having a plurality of bridge contacts; a first terminal, including a first terminal end facing an opposite axial direction, configured to releasably and electrically couple with an electrical conductor of ordnance, and a first chip end that electrically couples with one of the bridge contacts; a second terminal, including a second terminal end, configured to releasably and electrically couple with another electrical conductor of ordnance, and a second chip end that electrically couples with another of the bridge contacts; and a shaped composite housing encapsulating at least some of the initiator chip, the first terminal, and the second terminal, such that at least a portion of an outer diameter of the first terminal end and an outer diameter of the second terminal end are positioned nearer a center axis than an outer edge of the initiator chip.
Aug 18, 2026
An apparatus for perforating a wellbore includes a plurality of perforator units that includes a first perforator unit and a second perforator unit; and a signal transfer module connecting the first perforator unit to the second perforator unit. The signal transfer module includes an enclosure having a bore, an input end, and an output end, an initiator positioned adjacent to the first perforator unit and at least partially in the enclosure, an initiator, an igniter, a fuse, and an isolator. The initiator generates a shock wave when initiated. The igniter is positioned in the enclosure and generates a low order output upon receiving the shock wave generated by the initiator. The fuse is positioned in the enclosure and is initiated by the low order output of the igniter. The fuse outputs a high order output from the output end of the enclosure. The isolator secures the fuse body in the bore of the enclosure. The isolator includes a shock attenuator. Only the shock attenuator physically connects the fuse to the enclosure.
Jul 7, 2026
An arrangement has an opto-pyrotechnic initiator, at least one laser, and an optical fibre, via which the laser radiation of the laser is guided to the opto-pyrotechnic initiator. Also disclosed is a method for improving the safety of such an opto-pyrotechnic initiator. At least one optical filter element having power-dependent or intensity-dependent transmission or reflection is arranged in the beam path of the laser radiation between the laser and the initiating impingement location of the laser radiation in the initiator. The filter element and the beam guidance for the laser radiation are selected such that for a laser power of the laser, that is intended to effect an initiation, the filter element has a higher transmission or reflection or can be switched to a higher transmission or reflection than for a lower laser power by application of an optical or electronic signal that is independent of the laser radiation.
Jun 30, 2026
An exploding foil initiator (EFI) assembly includes: a housing assembly, having a base, one or more elongated supports spaced about a circumference of the base extending axially away from the base, and protuberances extending radially-inwardly toward a central axis; a spring configured to compress a leadframe, an insulator, a pellet sleeve, and an explosive pellet; and a retainer cap with a surface that abuts the spring that releasably engages the protuberances and compresses the spring while engaged with the protuberances.
May 19, 2026
A fuse assembly that includes a low energy exploding foil initiator (LEEFI) located in a housing thereof. The LEEFI is supported in the housing by a sleeve made of a compliant material that protects the LEEFI by dampening shocks and vibrations applied to the housing. At least a portion of the LEEFI is press-fit into the sleeve such that an interference fit exists between an outer cylindrical wall of the LEEFI casing and in inner wall of the housing. The sleeve includes a latch assembly at one end having a plurality of tabs that are circumferentially spaced-apart from one another. Each of the plurality of tabs includes a cantilever beam having a head, the head including a bottom surface pressed against a top surface of the external annular flange of the LEEFI casing.
