According to some embodiments, a holding device for a detonation initiation system is disclosed. The holding device includes an initiator holder having a longitudinal internal cavity. The longitudinal internal cavity is configured to retain an initiator and an electrical cable in electrical contact with the initiator. The holding device further includes a plurality of retention fingers configured for retaining a shaped charge adjacent the initiator. The plurality of retention fingers define a shaped charge receiving portion that may be configured to receive shaped charges of different shapes. The holder may be formed from a thermoplastic material.

A propellant container for a perforating gun includes a lower cap, one or more pieces of propellant positioned within the lower cap, wherein at least one of the one or more pieces of propellant defines one or more through-holes, and an upper cap matable with the lower cap to secure the one or more pieces of propellant within the lower cap. A filler material is present within interstitial spaces between the one or more pieces of propellant.

The present disclosure relates to a detonation connector having an electric wire mounting structure, the detonation connector includes: an electrically conductive wire-connecting bracket member having a plurality of electric wire mounting gloves to which a leg line or a leading line is mounted; a lower casing member at which the wire-connecting bracket member is positioned and an upper casing member covering the lower casing member, wherein the lower casing member may be provided with an opening through which a leg line passes, and the lower casing member is provided with a leg line mounting part therein. Accordingly, a stable connection state in the connector is maintained by fixing a double coated electric wire or a single coated electric wire in a state of being mounted to an opening of the detonation connector and the connection stability and the connection reliability of the leg line and the leading line are secured.

A loading tube is configured to receive one or more shaped charges to form a perforating gun. The loading tube includes a tubular body extending along a longitudinal axis; a cord passage formed into the tubular body; a retention cutoff formed into the tubular body and configured to receive a detonator cord; and a holding element extending into the retention cutoff and being integrally made with a wall of the tubular body, wherein the holding element is configured to hold the detonator cord into the retention cutoff. The cord passage is configured to receive the detonator cord from a bore of the tubular body and to direct the detonator cord outside the bore of the tubular body.

A perforating gun assembly may include a first housing extending along a longitudinal axis and a tandem seal adapter (TSA). The first housing may include a coupling provided at a first end of the first housing. The TSA may include a TSA body and a seal element provided on an outer surface of the TSA body. At least part of the TSA may be positioned inside the first housing such that the seal element and the coupling intersect with a common plane that is perpendicular to the longitudinal axis.

A pyrotechnic firing system for igniting an explosive charge comprising one or more firing modules, a firing control system, and an igniter cable system. The firing module can comprise a transceiver, a memory, an antenna, a processing means, and one or more cues. The firing control system can comprise a processing means, memory, transceiver, antenna, and display. The firing control system can identifying and obtaining information from one or more firing modules. The control system can then assign visual indicators to each of the one or more firing modules and display the visual indicators to a user on the display.

Disclosed is a firing device for shock tube. Shock tube is a non-electric explosive initiator, well known to those of ordinary skill in the art. The firing device is configured to provide a redundant dual-ignition capability for connected shock tube. In this way, a second attempt to initiate the shock tube can be made immediately following a failed first attempt. To provide this functionality, the firing device includes a primer tray that can be preloaded with two primers. Using an operably connected selector, the primer tray can be rotated between use positions that individually locate each primer for detonation.

The present disclosure describes systems and methods for delivering a primer to an operative depth for initiating an explosion of an explosive material in a blasthole. Systems described herein can include a cap structure providing access into the hole and a separable detonator subassembly that can be deployed to convey a detonator to a priming position. Methods of priming a blasthole can include placing such a system on a blasthole collar and deploying the detonator subassembly in conjunction with loading the blasthole with explosive material.

A ballistic transfer system, comprising: a housing, wherein the housing is cylindrical, wherein the housing comprises: a central bore that traverses a length of the housing; a first end; wherein the first end is disposed about a first ballistic apparatus; and a second end, wherein the second end is opposite to the first end, wherein the second end is disposed about a second ballistic apparatus; an alignment insert, wherein the alignment insert is secured into the housing; a first detonation transfer line, wherein a portion of the first detonation transfer line is disposed within the alignment insert; and a second detonation transfer line, wherein a portion of the second detonation transfer line is disposed within the alignment insert.

A tandem seal adapter (TSA) for use with a wellbore tool may include a TSA body including a first end and a second end opposite the first end in an axial direction, a bore extending through the TSA body from the first end to the second end, an electrical contact assembly provided within the bore, the electrical contact assembly being configured to provide electrical connectivity through the bore. The electrical contact assembly may include a bulkhead provided within the bore. An axial position of a maximum outer diameter of the TSA body may overlap with the bulkhead in the axial direction. A portion of the bore overlapping in the axial direction with an entirety of the TSA body having an outer diameter equal to the maximum outer diameter may have a constant bore diameter.