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| Number | Title | Issue Date |
| 7409911 | Propellant for fracturing wells An apparatus for fracturing wells employs a propellant charge and an ignition cord wrapped around the outer surface of the propellant charge to rapidly ignite the outer surface of the propellant charge. ... | 08/12/2008 |
| 7368025 | Method for making a thermally protective coating for a propulsive unit structure A method of making a thermally-protective coating on a thruster structure, the method consisting in: continuously measuring out and mixing (14) at least one polyurethane and a mixture of polymerization agents in which specific fillers have previously been dis... | 05/06/2008 |
| 7299734 | Synchronously/synergeticly timed fuse procedure or process A synchronous or synergeticly timed fuse is installed into ordnance (bombs, artillery shells, depth charges etc.), the ordnance is delivered to a target area and a simultaneous (synchronous), or a synergetic (not neccessarily synchronous yet the energies add togethe... | 11/27/2007 |
| 7000545 | Multifunctional breaching apparatus Breaching apparatus including a housing constructed of a material that disintegrates upon explosion without significant amounts of fragments being given off, and an explosive element disposed in the housing capable of producing an explosive force sufficient for brea... | 02/21/2006 |
| 6913661 | Ammonium nitrate propellants and methods for preparing the same The present invention is directed to an age-stabilized and/or strengthened ammonium nitrate propellant composition wherein the strengthening agent is selected from the group consisting of azodicarbonamide, dicyandiamide, oxamide and mixtures thereof and wherein the ... | 07/05/2005 |
| 6708619 | Cartridge shell and cartridge for blast holes and method of use A cartridge shell 10 comprises a main body 12 defining a volume 14 for holding energetic material. The main body 12 has a first end 16 for location adjacent a toe 48 of a hole 46 and a second end 18 directed to... | 03/23/2004 |
| 6439121 | Perforating charge carrier and method of assembly for same A tubular charge holder assembly for a perforating gun made of a tube having a plurality of pairs of diametrically opposed openings. The pairs of openings are formed over a length of the tube, wherein the each pair has a larger and a smaller opening. A sh... | 08/27/2002 |
| 6412415 | Shock and vibration protection for tools containing explosive components A method and apparatus for use in a wellbore includes explosive components, a housing containing the explosive components, and at least one protection barrier mounted on the housing to reduce transmissibility of an external force load to the housing. The ... | 07/02/2002 |
| 6209457 | Method and preformed composition for controlled localized heating of a base material using an exothermic reaction A method and an exothermic composition for controlled localized heating of a base material, said composition comprising an exothermic mixture material, a binder material, and optional filler and starter materials, said exothermic mixture material having a... | 04/03/2001 |
| 6079333 | GPS controlled blaster A blasting system using the global positioning system (GPS) for timing the detonations for a shaped blast. The blasting system includes a master station including a master GPS receiver for determining a GPS-based time and a master transceiver in communica... | 06/27/2000 |
| 5844322 | Low energy fuse and method for its manufacture A low energy fuse, comprising a plastic tube with a channel, the channel containing a reactive material able upon ignition to sustain a shock wave within the channel, the tube comprising at least two layers of plastic materials, a first plastic layer clos... | 12/01/1998 |
| 5798477 | Explosive cartridge assembly for presplitting rock The present invention includes a small diameter explosive cartridge and a two-stage large diameter explosive cartridge apparatus for presplitting rock can be axially detonated by detonating cord through a central detonation passageway in the explosive car... | 08/25/1998 |
| 5763816 | Explosive primer An explosive primer designed for use with a fuse cord and an initiating device. The primer consists of a container, which holds the explosive, and a cap received on the open end of the container. The container has two lateral opposing cord tunnels which r... | 06/09/1998 |
| 5700970 | Broken-emulsion and process for recycling emulsion explosives The present invention is directed to the manufacture of a broken-emulsion which is comprised of polyglycol bottoms and emulsion. The broken-emulsion can be made from waste emulsion and can subsequently be used as a fuel component and/or oxidizer in an exp... | 12/23/1997 |
| 5608185 | Method of reducing nitrogen oxide fumes in blasting This invention relates to a method of reducing the formation of toxic nitrogen oxides in after-blast fumes by using an emulsion blasting agent that has an appreciable amount of urea in its discontinuous oxidizer salt phase.... | 03/04/1997 |
| 5505135 | Low stress casing joint configuration A pulverable casing (10) includes a housing (12) which is made from a ceramic material and which defines a circular housing closure surface (18). There is a cover (14) on the housing (12). The cover (14) is also made from a ceramic material and defines a ... | 04/09/1996 |
| 5483895 | Detonation system for detonating explosive charges in well In well perforating operations, it is necessary to detonate shaped charges suspended in the well. To avoid dangerous detonation at the surface, a pressure responsive mechanism is set to respond to a pressure indicative of operation at a selected depth. Th... | 01/16/1996 |
| 5470407 | Method of varying rate of detonation in an explosive composition Provided herewith is a method for preparing an explosive composition with an adjusted rate of detonation which matches the rock stratum in which blasting is to occur. The composition is comprised of a mixture of glass microballoons and plastic spheres, wh... | 11/28/1995 |
| 5375528 | Container for a large spherical explosive charge A light weight explosive mass for a spherical charge of high explosives used to simulate nuclear bursts at ground or above ground level or underwater wherein the sphericity of the loaded explosive mass must be maintained within tight tolerance, exemplary ... | 12/27/1994 |
| 5349892 | Propellant stick kerfing apparatus and method A propellant stick kerfing apparatus includes a support frame, a conveyor mounted on the support frame and operable for conveying a succession of spaced propellant sticks along a path of travel with the sticks extending in transverse relation to the direc... | 09/27/1994 |
| 5307743 | Apparatus for deslagging a cyclone furnace A method and apparatus for deslagging a cyclone furnace in which a series of flexible hollow tubes are inserted into the combustion chamber and the explosive charges in each hollow tube are detonated sequentially. Each of the hollow tubes is biased outwar... | 05/03/1994 |
| 5071496 | Low level blasting composition A blasting agent is disclosed for use in a borehole having a pressure resistant closure. The blasting agent is used in combination with a primary initiating system comprised of a detonator and an initiator for the detonator. The blasting agent is preferab... | 12/10/1991 |
| 5069133 | Elastomer-containing casings for propellants The present invention relates to a process for producing an encased propellant which comprises overwrapping at least one charge of propellant with an elastomeric coating composition to produce the desired encased propellant. The process is suitably effect... | 12/03/1991 |
| 5069132 | Water-in-oil type emulsion explosive envelope A water-in-oil type emulsion explosive envelope comprises a water-in-oil type emulsion explosive and a paper wrapping the explosive. In this envelope, the paper is coated with a low-temperature melt resin and wrapped double so as to adhere joint faces to ... | 12/03/1991 |
| 5024159 | Plane-wave forming sheet explosive An explosive sheet which is formed by a layer of explosive material, a layer of foil, and an inert space forming material. These three layers are repeated to number, n, times to form a composite plane-wave forming explosive sheet.... | 06/18/1991 |
| 4987818 | Shaping apparatus for an explosive charge The invention provides shaping apparatus for an explosive charge, particularly for use with plastic explosive in forming shaped charges. The shaping apparatus comprises a hollow cylindrical body (1), a substantially conical partition (2) within said body ... | 01/29/1991 |
| 4938143 | Booster shaped for high-efficiency detonating A booster for high efficiency initiation of an explosive material comprising a body portion having substantially tapered sides and a substantially flat interface surface at the larger end of the body portion extending generally laterally thereof for conta... | 07/03/1990 |
| 4879952 | Primer A primer for an explosive charge which is to be initiated by a fuse cord is sensitized by a loose charge of a high explosive, this high explosive being contained in a rigid, impermeable container which is so shaped that it at least partially surrounds the... | 11/14/1989 |
| 4733610 | 3-nitro-1,2,4-triazol-5-one, a less sensitive explosive A less sensitive explosive, 3-nitro-1,2,4-triazol-5-one. The compound 3-nitro-1,2,4-triazol-5-one (NTO) has a crystal density of 1.93 g/cm3 and calculated detonation velocity and pressure equivalent to those of RDX. It can be prepared in high y... | 03/29/1988 |
| 4706567 | Explosive charges The disclosure relates to a method for producing charges for explosive jointing of large-diameter pipes such as pipelines. According to the invention, such charges are formed in that a strip-shaped flat explosive is wound and joined together to form a cir... | 11/17/1987 |
| 4649825 | Explosive separation system for composite materials An explosive separation system for making a clean cut in composite laminate aterials in which a flexible linear shaped charge is maintained in a molded holder of a low-density, energy-absorbing material. The flexible linear shaped charge is molded in the h... | 03/17/1987 |
| 4641581 | Dual-function storage container for prilled explosive Disclosed is a low cost bulk explosive storage container constructed in such a way that simple on-site modifications, specifically the attachment of a metal liner and the addition of a fluid will transform the carrying container into a directed energy dem... | 02/10/1987 |
| 4640192 | Means for securing tubes to a tube sheet A device for mechanically welding a tube to a tube sheet having holes into which the tube is placed. A detonator is provided for detonating explosives for generating gas at a high pressure. A barrel having a perforated section is attached to the detonator... | 02/03/1987 |
| 4634480 | Method of combining liquid explosive compositions for field operations A method of combining explosive compositions prepared from commercially available nitric acid and a common industrial solvent is disclosed herein which exhibits exceedingly high blasting strengths. The compositions are relatively more stable than conventi... | 01/06/1987 |
| 4615271 | Shock-augmenting charge with axially-grooved booster housing A cylindrical housing for a shock-augmenting charge is provided with axially extending grooves in its outer wall to enhance its radial detonation capability. When used in a cylindrical warhead for augmenting detonation of a main charge of insensitive high... | 10/07/1986 |
| 4537133 | Non-incendive rock-breaking explosive charge Non-incendive explosive charge for use in flammable atmospheres includes a layer of damp salt as quenching material surrounding a charge enclosed in an inner housing. An outer housing is strong and pliable, being formed of reinforced rubbery material, to ... | 08/27/1985 |
| 4510870 | Charge liner construction and method A method of reducing the velocity gradient of a shaped charge liner is diosed. A particular construction for the liner is also disclosed which has the same effect. The velocity gradient and jet-tip velocity are both reduced by forming a plurality of rela... | 04/16/1985 |
| 4499828 | Barrier breaching device A barrier breaching device that is designed primarily for opening holes in interior walls of buildings uses detonating fuse for explosive force. The fuse acts as the ribs or spokes of an umbrella-like device that may be opened up to form a cone. The cone ... | 02/19/1985 |
| 4487129 | Methods of and containers for igniting explosives The invention provides a container for explosive material comprising a rigid tube (10 FIGS. 1-4, 18 FIGS. 5-8) a closure (13,14; 19,20) at each end of the tube, said tube having a recess (12; 21) in its wall between its ends to receive a detonating cartri... | 12/11/1984 |
| 4485741 | Booster container with isolated and open cord tunnels A booster container is used to hold a primary charge useful for detonating cap insensitive explosives, such as ammonium nitrate. The container includes a pair of cord tunnels which may be used in various combinations to detonate the primary charge with ei... | 12/04/1984 |
