An integrally bladed rotor (IBR) for a gas turbine engine is provided. The IBR includes a hub, rotor blades that include a test blade, and at least one heating element. Each rotor blade has an airfoil with leading and trailing edges, suction side and pressure side surfaces, and a base end. The airfoil of the test blade includes at least one slot defining a void in the airfoil. The slot extends a lengthwise distance into the airfoil along a direction generally between the leading and trailing edges of the airfoil and terminates at a slot end surface. The airfoil includes at least one internal cavity extending lengthwise from the slot end surface. The heating element is disposed in the internal cavity and selectively produces thermal energy sufficient to heat the airfoil material proximate the internal cavity to a temperature at which the airfoil mechanical strength properties are decreased.

A shell for use in blasting, the shell comprising an elongated body, the elongated body having a distal end arranged for housing an explosive material, a proximal end arranged to permit introduction of at least one detonator into an interior of the shell, and a cavity for holding the at least one detonator in a location in which operation of the detonator results in explosion of the explosive material, wherein a slot is provided in a sidewall of the shell to allow an activation lead connected to the detonator to pass through the slot to an exterior of the shell, and wherein the slot includes at least one retaining protrusion to retain the activation lead against withdrawal of the activation lead from the slot.

A wellbore select fire switch retaining member system and method with an integrated through wire and ground wire in a switch sub. The system/method includes a retaining member that has a form factor acceptable by a conventional switch sub. The retaining member incorporates an electrical connection to the center pin of a pressure switch. The system further includes a secondary piston aligned with a piston in the switch (switch piston) so that external pressure is fully acted upon the entire switch piston creating a reliable switch connection. Another system includes an integrated retaining member and switch module having a form factor compatible with existing switch subs. The integrated module inputs include a ground wire and a through wire and the outputs include a ground wire, through wire and an arming wire.

A wellbore select fire switch retaining member system and method with an integrated through wire and ground wire in a switch sub. The system/method includes a retaining member that has a form factor acceptable by a conventional switch sub. The retaining member incorporates an electrical connection to the center pin of a pressure switch. The system further includes a secondary piston aligned with a piston in the switch (switch piston) so that external pressure is fully acted upon the entire switch piston creating a reliable switch connection. Another system includes an integrated retaining member and switch module having a form factor compatible with existing switch subs. The integrated module inputs include a ground wire and a through wire and the outputs include a ground wire, through wire and an arming wire.

A wellbore select fire switch retaining member system and method with an integrated through wire and ground wire in a switch sub. The system/method includes a retaining member that has a form factor acceptable by a conventional switch sub. The retaining member incorporates an electrical connection to the center pin of a pressure switch. The system further includes a secondary piston aligned with a piston in the switch (switch piston) so that external pressure is fully acted upon the entire switch piston creating a reliable switch connection. Another system includes an integrated retaining member and switch module having a form factor compatible with existing switch subs. The integrated module inputs include a ground wire and a through wire and the outputs include a ground wire, through wire and an arming wire.

The present invention relates to using at least one explosive device to enable rapid and accurate positioning and repositioning of at least one explosive charge for controlled penetration of targets. A penetrator allows effective demolition with minimal explosive load. An attachment collar with magnetic inserts allows quick repositioning of explosive devices. A plurality of explosive devices allows a demolition profile to be rapidly created and adjusted on-site to adapt to changes in structural or environmental conditions.

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 utility model relates to a container or receptacle for containing a mixture, preferably pentolite, used to initiate a blasting process. Said container comprises at least one lower part intended to contain the mixture of explosive material, and an upper part or cover intended to maintain the structural unity of the container and prevent the mixture from leaving of the container, wherein said lower part comprises an elongated hollow structure with a base, and a duct or pin inside the same, which extends from the base of the lower part of the container to a defined distance of the upper end of the lower part, wherein the duct or pin is opened at both ends, and wherein the cover of the container comprises an opening, which is supplemented by the upper part of the opened duct or pin, and comprises at least one opening, from which a respective duct or pin extends towards the lower part of the cover, where said duct or pin is closed in the lower part thereof.

Pyrotechnic devices and firing mechanisms for aircraft canopy jettison are disclosed herein. An example firing mechanism includes a housing defining a first bore, a second bore, and a channel between the first bore and the second bore, a primary charge disposed in the second bore, a closure disc between the second bore and the channel, and a firing pin assembly disposed in the first bore. The firing pin assembly includes a percussion primer and a firing pin piston including a piston body, a firing pin extending from the piston body, and a piercing pin extending from the piston body. In response to a firing signal, the firing pin piston is moved toward the primary charge such that the piercing pin punctures the closure disc and the firing pin engages the percussion primer to ignite the primary charge.

Rocket armament launchable from a tubular launcher with an outside launcher non-ignition securing and motor separation during flight and a method to prevent the ignition of the armaments rocket even in the event of actuation of the armaments pyrotechnic assembly, which normally serves to eject the armament from the launcher and to ignite its rocket motor, wherein the armament comprises a gas dispersion assembly, which when the armament is not encased in the tubular launcher, prevents the ignition of the rocket motor even if the armaments pyrotechnic assembly is actuated; and a cutting and separation assembly that is actuated by the pressure of the rocket motor gases for mechanically cutting a structural connection between the rocket motor and the armaments effective payload and separate them during their flight.