A method and apparatus for igniting a power charge in downhole wellbore using an ignition propellant mixed with a main propellant, the ignition propellant may be concentrated at the first end of a housing where it is the majority propellant and then gradually mix with the main propellant, transitioning to a majority of the main propellant.

A method and apparatus for igniting a power charge in downhole wellbore using an ignition propellant mixed with a main propellant, the ignition propellant may be concentrated at the first end of a housing where it is the majority propellant and then gradually mix with the main propellant, transitioning to a majority of the main propellant.

A de-coupling mechanism includes a link slidably received in a link aperture of a bracket. A pin is slidably received in a pin bore of the link and a receiving bore of the bracket. A first block is connected to the bracket and includes an initiator receiving passage in communication with the pin bore. An initiator is positioned in the initiator receiving passage and retained against a connecting passage edge and oppositely contacts an end face of a cap connected to the first block. A second block connected to the bracket includes a longitudinal channel having a channel diameter larger than a pin diameter so the pin is freely displaceable into the longitudinal channel. An end face of a retaining cap is connected to a second block end wall. The retaining cap includes a stepped portion having a step diameter smaller than the channel diameter and the pin diameter.

Disclosed herein are embodiments of devices comprising energetic materials capable of superdetonation and methods of making and using such devices. The devices disclosed herein comprise components, dimensions, and configurations optimized to utilize superdetonation velocities produced by the energetic materials disclosed herein.

An injector can include an ignition device having a partition member which forms a first space to store a gunpowder and which is formed of a prescribed rigid material such that the partition member is breached based on a rise in pressure of the first space when the gunpowder is burned. The injector can also include a case including a base section fixed on a side of the ignition device. The case can be arranged in a space inside the injector main body so as to cover the ignition device. The case can define a second space with the partition member of the ignition device and encapsulate, inside the second space, a combustion product of the gunpowder. When the gunpowder burns in the ignition device and pressure inside the second space rises, a part of the case extends so as to approach a prescribed end section.

The invention describes a holding device (12) for holding and releasing a tensioning means (14) of a vehicle safety system. The holding device (12) includes a pyrotechnical actuator assembly (24) for holding and, in terms of signals, specifically releasing the tensioning means (14), wherein the actuator assembly (24) comprises a plastic base (26) in which a pyrotechnical unit (28) including a propelling charge and an igniter (30) is accommodated and held, wherein the pyrotechnical unit (28) has a rear side (36) and an opposite front side (38), and a tensioning means holder (40) which is adjacent to the front side (38) of the pyrotechnical unit (28) and covers the same and which is detachably supported on the plastic base (26). The holding device (12) additionally includes a reinforcing element (58) which is supported to be axially movable between a first position and a second position, wherein the reinforcing element (58) in a second position is disengaged from the tensioning means holder (40) and in a first position is at least partially accommodated in the tensioning means holder (40) and mechanically reinforces the same. Furthermore, an airbag module (10) is described.

A battery system for a heavy-duty vehicle, comprising at least one battery section which comprises a plurality of traction battery packs, a hold-and-release mechanism for connecting the battery section to the vehicle at a first point of connection and for enabling quick-release of the battery section from the vehicle in case of emergency, a towing attachment element connected to the battery section and presenting a second point of connection for receiving a towing device for transporting the battery section away from the vehicle by towing, after the hold-and-release mechanism has released the battery section from the vehicle, wherein the first point of connection is different from the second point of connection. The invention also relates to a heavy-duty vehicle comprising such a battery system.

A method of loading a blast hole, the method comprising the step of applying a composition to a blast hole wherein the composition provides a barrier layer between an explosive loaded in the blast hole and water in the blast hole.

Select-fire, downhole shockwave generation devices, hydrocarbon wells that include the shockwave generation devices, and methods of utilizing the same are disclosed herein. The shockwave generation devices are configured to generate a shockwave within a wellbore fluid that extends within a tubular conduit of a wellbore tubular. The shockwave generation devices include a core, a plurality of explosive charges arranged on an external surface of the core, and a plurality of triggering devices. Each of the plurality of triggering devices is associated with a selected one of the plurality of explosive charges and is configured to selectively initiate explosion of the selected one of the plurality of explosive charges. The methods include methods of generating a shockwave utilizing the downhole shockwave generation devices.

Select-fire, downhole shockwave generation devices, hydrocarbon wells that include the shockwave generation devices, and methods of utilizing the same are disclosed herein. The shockwave generation devices are configured to generate a shockwave within a wellbore fluid that extends within a tubular conduit of a wellbore tubular. The shockwave generation devices include a core, a plurality of explosive charges arranged on an external surface of the core, and a plurality of triggering devices. Each of the plurality of triggering devices is associated with a selected one of the plurality of explosive charges and is configured to selectively initiate explosion of the selected one of the plurality of explosive charges. The methods include methods of generating a shockwave utilizing the downhole shockwave generation devices.