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| Number | Title | Issue Date |
| 8146500 | Multifunctional detonation system Explosive apparatus has at least two cuboid moldings, which each includes at least one firing hole and explosive, and whose edge lengths have a ratio of substantially 1:2:4, and a container including an internal area having a square outline and at least one aperture... | 04/03/2012 |
| 7942098 | Loading tube for shaped charges A loading tube for use in a perforating gun is disclosed which eliminates the necessity for utilization of plastic jackets to restrain shaped charges. The loading tube comprises a first tubular member and an engagement structure in the first tubular member in which ... | 05/17/2011 |
| 7284489 | 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 |
| 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 |
| 7104326 | Apparatus and method for severing pipe utilizing a multi-point initiation explosive device A system and method for making and using a multi-point initiation explosive device that produces an enhanced pressure wave for severing tubing, pipe or casing in an oil or gas well. At least two opposed initiators initiate a column of explosive material from opposit... | 09/12/2006 |
| 7073589 | System for fracturing wells using supplemental longer-burning propellants A system for fracturing wells uses a primary propellant charge to initially produce pressures within the well in excess of the maximum fracture extension pressure of the surrounding formation, but below that which would cause damage to the well. A supplemental prope... | 07/11/2006 |
| 6991044 | High-energy combined well perforating device The invention relates to a perforating device comprising one or more perforating gun (1) installed in a perforating body (9), a perforating gun head (2) in the uppermost end of the perforating body (9), a perforating gun base (7) i... | 01/31/2006 |
| 6962202 | Casing conveyed well perforating apparatus and method Disclosed is a casing conveyed perforating apparatus and method for externally perforating a wellbore casing. The perforating apparatus is attached to the outside of the casing and is conveyed along with the casing when it is inserted into the wellbore. The perforat... | 11/08/2005 |
| 6941871 | Faceted expansion relief perforating device The present invention is an improvement in the design of a perforating gun to perforate the casing in oil and gas wells. Perforating guns have a cylindrical body member with explosive charges at specified intervals designed to shoot outwardly through the body member... | 09/13/2005 |
| 6918334 | Perforating gun firing head with vented block for holding detonator A firing head for a perforating gun includes a detonating block having a first end and a second end, with the second end being structured and arranged so as to be located adjacent to a detonation material. A central passage extends through the detonating block from ... | 07/19/2005 |
| 6523449 | Perforating gun A technique includes arranging perforating charges of a perforating gun into groups of adjacent perforating charges. Each perforating charge of each group is aligned in a direction associated with the group. The groups are oriented to form a phasing for t... | 02/25/2003 |
| 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 |
| 6422147 | Sequential detonation of explosive charges A control system for controlling the initiation of detonation of a series of explosive charges (13) spaced apart from each other in boreholes (12) formed in a rock medium (10) to be blasted, said system being operative to apply controlled time difference ... | 07/23/2002 |
| 6283032 | Projectile with controlled decomposition and integrated charge in the area of the effective mass A smoke-generating projectile has a decomposable effective mass, the mass including a quick-burning deception component for generating spontaneous smoke, and a slow-burning concealment component for generating persistent smoke. The projectile includes an ... | 09/04/2001 |
| 6220370 | Circulating gun system A tubing conveyed perforating apparatus is shown which includes a tubular firing section which carries a plurality of explosive charges. The explosive charges are initially aligned with regions of reduced wall area provided in a tubular firing section whi... | 04/24/2001 |
| 5612505 | Dual mode warhead A dual mode warhead is provided for use against both soft and hard targets nd capable of sensing which type of target has been struck comprising a casing made of a ductile material containing an explosive charge and a fuze assembly. The ductile warhead cas... | 03/18/1997 |
| 5590723 | Perforating charge carrier assembly The invention provides a new strip carrier assembly for carrying shaped charges, such as is particularly useful in perforating guns as are utilized to perforate oil and gas wells. The strip carrier includes a coupling member which couples adjacent strip c... | 01/07/1997 |
| 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 |
| 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 |
| 5388521 | Method of reducing ground vibration from delay blasting A formation is blasted with one or more arrays of elongated, chemical, explosive charges so as to produce relatively low levels of ground vibration. The orientation and velocity of propagation of explosion in each charge and the velocity of propagation of... | 02/14/1995 |
| 5095999 | Through tubing perforating gun including a plurality of phased capsule charges mounted on a retrievable base strip via a plurality of shatterable support rings A through-tubing perforating gun includes an angularly shaped base strip having first and second surfaces and including a plurality of recesses in the first surface and a plurality of recesses in the second surface. A plurality of capsule charges are moun... | 03/17/1992 |
| 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 |
| 5054564 | Well perforating apparatus A perforating gun is designed to have explosive charges spirally disposed around its circumference in accordance with a displacement angle defined as (m/p)(360°), where p is a whole number greater than 4 and m is a whole number greater than 1 but less th... | 10/08/1991 |
| 5024158 | Multi-directional initiator for explosives A method of blasting cap-sensitive, non-nitroglycerine-sensitized explosives and an initiating assembly for use in the method are provided. The method comprises initiating a column of the explosives by directing two radial/forward shock forces from an ini... | 06/18/1991 |
| 5022485 | Method and apparatus for detonation of distributed charges A method and apparatus for geophysical exploration wherein a seismic wave is passed through a bore hole so at to sequentially detonate a plurality of explosive charges disposed within said bore hole at spaced intervals. A preselected seismic wave magnitud... | 06/11/1991 |
| 4991684 | Method and apparatus for detonation of distributed charges A method and apparatus for geophysical exploration wherein a seismic wave is passed through a bore hole so as to sequentially detonate a plurality of explosive charges disposed within said bore hole at spaced intervals. A preselected seismic wave magnitud... | 02/12/1991 |
| 4951744 | Angularly shaped unitary structured base strip comprised of a specific material adapted for phasing charges in a perforating gun A perforating gun includes a base strip having an angular cross section, the base strip being a single unitary structure and essentially comprising at least two longitudinally disposed surfaces, a first surface and a second surface, a first plurality of c... | 08/28/1990 |
| 4901619 | Shaped charge with barrier produced in situ In the inventive shaped charge, the main charge and the propagating charge are held together solely by the barrier. This union is possible (and is distinguished by pronounced freedom from flaws) because the barrier is produced directly in the cavity in wh... | 02/20/1990 |
| 4844170 | Well perforating gun and method A well perforating gun and method of perforating a subterranean surface within a well bore are provided. The perforating gun comprises a tubular gun body having a plurality of external recesses formed therein and positioned in spaced relationship on a hel... | 07/04/1989 |
| 4832134 | Shaped charge assembly with retaining clip A shaped charge assembly includes at least one shaped charge having an outer case. The case has a forward end and a rearward end, and has a flange defined thereon. A retaining clip is operably associated with the flange and spans the rearward end of the c... | 05/23/1989 |
| 4815384 | Housing for joinable cutting charges A housing for joinable or interconnectable cutting charges, which is constituted of a casing, two end surfaces or plates, two spacer flaps, and of the insert. The frontal surfaces of the inserts are at least flush with the surfaces of the end plates or pr... | 03/28/1989 |
| 4815385 | Blast focusing method and apparatus A blast focusing technique for producing high pressure on a ground plane, in which a right circular cylinder of explosive material is positioned adjacent the ground plane with the cylinder axis orthogonal to the ground plane. The cylinder is simultaneousl... | 03/28/1989 |
| 4800815 | Shaped charge carrier A shaped charge carrier assembly includes a thin wall carrier having a charge opening disposed therethrough for freely receiving a shaped charge therein. A deformable retaining device is integrally formed with the thin wall carrier adjacent a periphery of... | 01/31/1989 |
| 4716833 | Method of assembling a tanged charge holder A shaped charge carrier assembly includes a strip type carrier having openings therein for receiving shaped charges. Each of the openings includes first and second diagonally opposed pairs of resilient tabs for snugly engaging an outer case of the shaped ... | 01/05/1988 |
| 4694754 | Multi-phase charge holder A shaped charge carrier assembly apparatus includes a carrier having a plurality of carrier segments integrally formed from a single substantially flat elongated sheet of structural material. An interconnecting portion is located between each two adjacent... | 09/22/1987 |
| 4632034 | Redundant detonation initiators for use in wells and method of use Methods and apparatus are provided for detonating high explosive devices downhole in a well. A high explosive device includes a detonating cord having a first end and a second end. A first device is provided for initiating a detonation of a detonating cor... | 12/30/1986 |
| 4498391 | Explosive mine breaking apparatus with arc-suppressing heat-dissipating fluid around the charge bodies Steep dip strong-coal deposits can be broken in an explosive mine environment utilizing a succession of explosive units each of which comprises a core tube surrounded by a body of explosive material which, in turn, is surrounded by an arc-suppressing heat... | 02/12/1985 |
| 4438699 | Method for remote positioning of explosive charges in mining voids Method and apparatus for remotely positioning individual explosive charges at preselected locations in substantially horizontal voids created by mining hard material such as coal are disclosed. The method includes the steps of positioning at least one cha... | 03/27/1984 |
| 4406226 | Non-electric delay blasting method A non-electric delay blasting method is provided which comprises the use of single trunk line of detonating cord having a series of detonating relays, all of the same delay period, connected at spaced intervals along its length. Branch lines of detonating... | 09/27/1983 |
| 4382410 | Explosive blasting method and means An explosive blasting method and apparatus for producing rock fragmentation and substantially reducing the amplitude of seismic effects (ground vibration) in the vicinity of the blast. An embodiment of the invention utilizes an air gap method and apparatu... | 05/10/1983 |
