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| Number | Title | Issue Date |
| 8028624 | Rock-blasting cartridge and blasting method A blasting cartridge comprising an elongated sleeve extending along an axis A and having a first end and a second end; the first end has a first sleeve closure with an opening for holding a detonator; the second end has a second sleeve closure; a space is provided b... | 10/04/2011 |
| 7284601 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7241095 | Dowel with locking features and method of using the same A hollow dowel pin adapted to secure together at least two mating components during the assembly thereof includes an elongate generally cylindrical main body portion, first and second mating edges, and at least one outwardly extending tab. The elongate generally cyl... | 07/10/2007 |
| 7228907 | High energy gas fracturing charge device and method of use A high energy gas fracturing device, adapted to be lowered into a well. The device comprises a closed tube made of strong material, sized to fit into the well and having at least one sidewall, which defines a set of openings. A set of closure elements seal the openi... | 06/12/2007 |
| 7210409 | Modular explosives cartridge and novel spider construction A modular explosives cartridge comprises a tubular body having lockable coupling members secured on opposite ends thereof to form a bayonet coupling between opposite ends of respective cartridges to form an elongate tubular explosives cartridge. The lockable couplin... | 05/01/2007 |
| 6817298 | Solid propellant gas generator with adjustable pressure pulse for well optimization A gas-generator is disclosed to intensify output of oil, gas, including gas from coal formations, or metals extracted by underground leaching by breakage and thermo gas chemical treatment of the critical formation zone with gaseous combustion products from a solid p... | 11/16/2004 |
| 6666141 | Variable increment modular artillery propellant A proportional modular assembly of two charges for use in a gun, which charges are structured so that the power of one charge is related to the power of the other charge by a ratio of integers.... | 12/23/2003 |
| 5959237 | Explosive charge with assembled segments and method of manufacturing same An improved cast explosive charge and a method of manufacturing said cast explosive charges utilizing an automated assembly system. The explosive charges are produced by combining two elongate cast segments, thereby abutting an exterior surface of one seg... | 09/28/1999 |
| 5714712 | Explosive initiation system A detonation system especially useful for initiating a plurality of substantially simultaneous seismic detonations includes an electric trunkline circuit disposed on the surface of a firing site containing boreholes, within which booster charges having re... | 02/03/1998 |
| 5710390 | Shock tube initiating system for display fireworks A system for initiating shock tube which has a low cost of manufacture, is relatively impervious to moisture, and initiates the shock tube reliably is described. The initiating system comprises a thermal input initiator device, a thermal enhancing output ... | 01/20/1998 |
| 5463955 | Transmission tube connector The present invention is directed to a connector for transmission tubes wherein a first initiated transmission tube transfers a signal to a second transmission tube within said connector.... | 11/07/1995 |
| 5435250 | Explosive packaging system A packaging system for explosives having a thin walled water resistent tube containing a low-sensitivity explosive therein. A first cap is fitted about one end of the tube and has a re-entrant portion that projects into the tube about which the explosive ... | 07/25/1995 |
| 5417162 | Detonation coupling device A coupling device (10) for coupling a detonator cap (20) with an unfixtured detonating cord (80, FIG. 3 ) after removing a shipping plug (41, FIG. 2 ), features a sleeve member (12) having a longitudinal sleeve bore (18) extending therethrough for receivi... | 05/23/1995 |
| 5282423 | Modular propellant charge A modular propellant charge (10) composed of N propellant charge modules (1; 11-16) each having a length Lo. In order to obtain an economical, durable, easily released connection between the propellant charge modules (1; 11-16), a displaceable sleeve (6; ... | 02/01/1994 |
| 5216197 | Explosive diode transfer system for a modular perforating apparatus An explosive diode transfer system is interconnected between adjacent perforating guns of a modular perforating apparatus. The explosive diode transfer system includes a downwardly directed shaped charge, a booster, and a multi-density barrier interposed ... | 06/01/1993 |
| 5212342 | Container for receiving propellant charges The field of invention is containers able to receive a propellant charge. A container (1, 12, 13) according to the invention, which is designed to be joined to another container at one of its end faces is characterized by the joining means having on the o... | 05/18/1993 |
| 5016535 | Arrangement for mine construction A mine assembly comprises at least one charge module having a cylindrical shape, and an upper and lower circular surface end. An activating module for detonating the at least one charge module is operatively connected thereto. The activating module has at... | 05/21/1991 |
| 4953464 | Multi-directional signal transmission in a blast initiation system The invention provides a connector, a transmitter, a bi-directional device, and a method for increasing the reliability of borehole detonation by using the connectors and transmitters provided by the invention. The invention provides connectors, each conn... | 09/04/1990 |
| 4922823 | Ignition transfer charge for a propelling charge An ignition transfer body for a propellant-charge module is coaxially surrounded by a supporting tube and includes at least one clear ignition channel. The ignition transfer charge is composed of a first propellant-charge powder generating thermal energy ... | 05/08/1990 |
| 4895218 | Multishot downhole explosive device as a seismic source A downhole seismic acoustical signal source capable of selectively firing numerous, prewired explosive charges. The downhole seismic source uses a self-contained firing circuit that is capable of receiving select and fire signals from a seismic crew at th... | 01/23/1990 |
| 4798244 | Tool and process for stimulating a subterranean formation A high energy gas fracturing tool for radially fracturing a rock formation in a well bore consisting of a cylindrical canister that is holed to pass gas and is for housing a stack of propellant modules that are selected to provide a desired burn rate when... | 01/17/1989 |
| 4546703 | Charge placement device A pre-packaged explosive charge of the type made up of modules having a threaded male coupling end and a threaded female coupling end is loaded into a bore hole by use of a plug fitting threadably attachable to the uppermost charge module. The fitting is ... | 10/15/1985 |
| 4496010 | Single-wire selective performation system A method and system for selecting and arming each one of a plurality of firing modules in a single-line selective perforating system is disclosed. A single firing line connects each firing module one at a time in a sequence to a control unit to receive po... | 01/29/1985 |
| 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 |
| 4348955 | Explosive container In a blow-molded, cylindrical plastic container for explosives adapted for end-to-end coupling with like containers, an improvement is provided in the sealing of the container at the exposed explosives end. The improvement comprises a section of reduced d... | 09/14/1982 |
| 4313380 | Distributed charge for seismic prospecting A distributed charge for use in producing a very sharp impulse for seismic prospecting comprises a series of lump explosive charges placed preferably of the order of at least 20 feet apart in a fluid in a well, connected with novel timed fuses. These fuse... | 02/02/1982 |
| 4294171 | Explosives package for coupled cast primer compositions An explosives package is disclosed comprising a plastic tubular container having male and female ends adapted to be coupled with like containers to form a column, and primer and blasting explosives contained therein. The container is open at both ends and... | 10/13/1981 |
| 4286520 | Linear explosive charge with constant detonation velocity and synchronous booster charges A linear explosive charge with constant detonation velocity, comprising a plurality of series-coupled explosive units or sticks. All sticks are identical and comprise a tubular member of selected length, with matched couplings. A helix of explosive cord i... | 09/01/1981 |
| 4284006 | Linear explosive charge with constant detonation velocity and synchronous booster charges A linear explosive charge with constant detonation velocity comprising, a plurality of separate similar sticks that can be axially coupled into a long linear substantially rigid assembly. Each of the sticks includes a helical winding of linear explosive c... | 08/18/1981 |
| 4000696 | Cartridge for two component field mixed explosive An explosive cartridge for use in an explosive column train by end to end coupling of a plurality of cartridges. Each cartridge comprises a cylindrical containing shell having an open rear end in which is a closure plug. In the pre-mix condition, the cart... | 01/04/1977 |
