Abstract: A multi-stage perforation and shock wave combined device and method for initial fracture enhancement are provided. The multi-stage perforation and shock wave combined device for initial fracture enhancement includes a perforating gun and a shock wave excitation nipple, where the perforating gun is configured to fire perforating bullets into a formation to form initial fractures; the shock wave excitation nipple is connected to the perforating gun, and includes an energetic rod capable of exploding after excitation and a feeding assembly; the feeding assembly includes a pushing head, a reciprocating spring, and a feeding spring; and the reciprocating spring is configured to push the pushing head, so as to push a spare energetic rod into a target position.

Abstract: A wellbore tool may include a port through the body and a first rupture disk disposed on the body and covering the port, the body defining a first interior chamber and a second interior chamber, with a liquid-permeable membrane separating the first interior chamber and the second interior chamber within the body. The body may be configured to retain a first solid reactant in the first interior chamber and a second solid reactant in the second interior chamber, wherein the first rupture disk is configured to rupture at a pressure differential downhole. A method for livening a well may include lowering the wellbore tool into a wellbore.

Abstract: A tool (1) for manipulating a target with combustion products from a propellant includes a housing (2) defining a chamber (12), at least two propellant sources located within the chamber and spaced apart one from the other, an ignition mechanism for igniting propellant (26) at the propellant sources, and at least one chamber outlet (30) for combustion products from the propellant sources. Methods of manipulating a target using the tool are also described.

Abstract: A tool (1) for manipulating a target with combustion products from a propellant, includes a housing (2) defining a chamber (12), a propellant source located within the chamber (12), an ignition mechanism (28) for igniting propellant (26) at the propellant source, and at least one chamber outlet (30) for combustion products from the propellant source. The tool (1) is configured to automatically open the chamber outlet (30) from a closed condition, following ignition of the propellant (26) at the propellant source. Methods of manipulating a target using the tool are also described.

Abstract: The present invention relates to an annular barrier to be expanded in an annulus between a well tubular structure and an inside wall of a borehole downhole for providing zone isolation between a first zone and a second zone of the borehole, the annular barrier comprising a tubular metal part for mounting as part of the well tubular structure, an expandable sleeve surrounding the tubular metal part and having an inner face facing the tubular metal part and an outer face facing the inside wall of the borehole, each end of the expandable sleeve being connected with the tubular metal part, and an annular space between the inner face of the expandable sleeve and the tubular metal part, wherein the tubular part and the inner face of the expandable sleeve substantially hermetically enclose the annular space, the annular space comprising a compound adapted to expand the annular space, and wherein the expandable sleeve comprises two first sections abutting the ends of the expandable sleeve and a second section between

Abstract: Embodiments of the invention are directed to enhancing insensitive munitions performance. Some embodiments of the invention employ an outgassing pad having unique geometrical configurations and positioning. Other embodiments rely on using thermally-releasable components to foster billet expulsion. Additional embodiments combine both aspects into an entire cook-off mitigation system.

Abstract: Embodiments of the invention are directed to enhancing insensitive munitions performance. Some embodiments of the invention employ an outgassing pad having unique geometrical configurations and positioning. Other embodiments rely on using thermally-releasable components to foster billet expulsion. Additional embodiments combine both aspects into an entire cook-off mitigation system.

Abstract: Device for severing parts of a concrete work, comprising a container in which an over-pressure is generated by a gas produced by a chemical reaction between a chemical compound and an aqueous solution after a predetermined delay. The container includes the aqueous solution and is attached to a case comprising a first recess for storing the chemical compound. A burst disk is arranged between the first recess and the container for ensuring a total sealing between the chemical compound and the aqueous solution. The case includes a second recess enclosing an electronic trigger, an actuator being controlled by the trigger to cause bursting of the burst disk after a predetermined delay, causing said chemical reaction inside the container.

Abstract: A system for unloading fluids from a generally upright tubular member of a wellbore wherein a combustible fuel cell can be placed in the tubular member below the fluid and ignited to generate gasses. The gasses generated by the burning of the fuel cell can be used to force at least a portion of the fluid upward out of the tubular member.

Abstract: An apparatus and method are provided for deploying a data sensing apparatus into a subsurface geologic formation for intermittent or continuously gathering data from the subsurface formation and transmitting the data to a remote data receiver. In a preferred embodiment, a non-linear arrangement of a barrel and a burn chamber is used to provide a gun-like device for firing a bullet-shaped data sensing apparatus into a formation of interest. The data sensing apparatus, once disposed within the matrix of the formation of interest, monitors formation conditions and transmits the data for use in optimizing drilling and production activities.

Abstract: An inflator and method of constructing the inflator comprising: a pressure vessel (22) in which inflation gas is stored; the pressure vessel including a first opening (114), pyrotechnic generator (42, 130) situated remote from the pressure vessel for generating products of to heat the inflation gas, a first burst disk (160, 150, 150') mounted to the pressure vessel to seal the first opening thereof after the pressure vessel has been charged to a determinable pressure with inflation gas and in communication with the pyrotechnic generator such that the products of combustion assist in the opening of the first burst disk.

Abstract: A decoy flare for infrared (IR) seeking missiles comprises a tubular outer shell with a first rupturing disc sealing a rear end of the outer shell and a cover member with a second rupturing disc sealing a front end of the outer shell. These form a sealed container for a pyrophoric liquid. A nozzle cap is attached to the cover member with a nozzle being located in front of the second rupturing disc. A piston in the container adjacent the first rupturing disc separates the pyrophoric liquid from the disc. A holder for a gas generator, a disc of energetic material, is connected in sealed relationship to the container to position the gas generator adjacent the first rupturing disc and form a gas generating chamber between the holder and that disc. That holder contains an ignition mechanism for the gas generator and a seal to prevent gases from escaping via the ignition mechanism after it is activated.

Abstract: A breech assembly similar to a modified shotgun breech is used to fire gaus combustion products from a shotgun type pyrotechnic cartridge into a tank that holds the compressed gas. This compressed gas can then be used to drive power tools, inflation assemblies or any device which normally operates on compressed air.

Abstract: This invention relates to a relesable attaching apparatus for attaching a portion of a first object to a portion of a second object. The attaching apparatus has an attaching member with walls defining a cavity therein. A rapidly expanding material is placed within the cavity such that when the material is caused to expand, the attaching member will break at a failure zone located adjacent to the cavity. The rapidly expanding material is a composition that undergoes a phase change from a solid to a liquid, wherein the volume of the liquid is larger than the volume of the solid. In operation, an initiator triggers the phase change which causes a pressure build-up in the cavity, thereby loading the attaching member and causing it to break at the failure zone. Accordingly, the first and second objects are freed from one another.

Abstract: A rapid burning propellant charge for applications including igniters, launch eject motor, and gas generators for automobile air bags. The propellant charge comprises a reticulated substrate having a quantity of interconnected ligaments and a coating of solid propellant material on the ligaments. In order to provide a large amount of surface area for a fast burn time, interstices are between coated ligaments to define propellant surface area for combustion. In applications where minimum smoke is desired, the reticulated substrate is preferably composed of carbon, graphite, or a non-combustible material, and the solid propellant material is preferably a minimum smoke type.

Abstract: A depth charge fuze includes a piston in a cylinder sealingly and displaceably guided to actuate a firing mechanism against atmospheric pressure within the cylinder on one side of the piston. The piston is operatively connected to a balancing device for balancing in axial direction. At the other side of the piston there is provided a pressure chamber connected to the surroundings by means of a number of throttling passages with valves depending on the surrounding water pressure for closing up the passages on different levels of water pressure. A shearing means retains the piston in a rest position up to a predetermined maximum pressure drop over the piston.

Abstract: A cartridge arrangement having propellant therein and a rocket assisted projectile for firing therefrom by ignition of propellant in the cartridge case, the rocket assisted projectile having an annular securing skirt rearward of a nozzle block and surrounding rifling band, with spaced pressure equalizing vent openings in the securing skirt for pressure equalization relief during debulleting of the projectile from the cartridge case or casing.