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| Number | Title | Issue Date |
| 7819064 | Shaped charge and a perforating gun A shaped charge comprises a shell, an explosive charge disposed inside the shell, and a first liner for retaining the explosive charge within the shell. The shaped charge further comprises an acid material disposed inside the shell on the first liner and retained by... | 10/26/2010 |
| 7624681 | Initiator activated by a stimulus A detonator assembly for initiating an explosive comprises a power source, an initiator, and a switch coupled between the power source and initiator. The switch has a trigger input responsive to a stimulus to activate the switch, where activation of the switch cause... | 12/01/2009 |
| 7430965 | Debris retention perforating apparatus and method for use of same A perforating apparatus (100) includes a plurality of shaped charges (102) each having an initiation end and a discharge end. A detonating cord (116) is operably coupled to the initiation ends of the shaped charges (102). A carrier (10... | 10/07/2008 |
| 7360587 | Debris reduction perforating apparatus A perforating apparatus (100) includes a plurality of shaped charges (102) each having a case, an initiation end and a discharge end. A detonating cord (116) is operably associated with the initiation ends of the shaped charges (102). An ... | 04/22/2008 |
| 7360599 | Debris reduction perforating apparatus and method for use of same A perforating apparatus (100) includes a plurality of shaped charges (102) each having a case, an initiation end and a discharge end. A detonating cord (116) is operably associated with the initiation ends of the shaped charges (102). An ... | 04/22/2008 |
| 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 |
| 7287589 | Well treatment system and method A well treatment system of the present invention includes a housing forming a sealed surge chamber, and a surge charge disposed within the sealed surge chamber, wherein the surge charge is adapted upon activation to penetrate the housing and to not penetrate materia... | 10/30/2007 |
| 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 |
| 7246548 | Well perforating gun Embodied herein is a perforating gun wall that withstands short, high energy pulses of an explosion retained within a loading tube with numerous explosive shaped charges. The perforating gun wall includes two or more layers with an impact strength sufficient to main... | 07/24/2007 |
| 7237486 | Low debris perforating gun system for oriented perforating Disclosed herein is a shaped charge assembly for use in a perforating gun. The shaped charge assembly includes a shaped charge combined with a longitudinal spine extending along a portion of a perforating gun barrel. The shaped charge can be secured to the spine wit... | 07/03/2007 |
| 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 |
| 7172023 | Perforating gun assembly and method for enhancing perforation depth A perforating gun assembly (110) for creating communication paths for fluid between a formation (114) and a cased wellbore (116) includes a housing, a detonator and a detonating cord (136). The perforating gun assembly (110) includ... | 02/06/2007 |
| 7146913 | Shaped charge tubing cutter A shaped charge detonation booster comprises a tubular wall body of substantially constant outside diameter for enclosing an axial primer path that terminates with an enlarged main cavity volume. Preferably, the main cavity is positioned within the juncture plane of... | 12/12/2006 |
| 7134492 | Mapping fracture dimensions Hydraulic fracture dimensions and, optionally, fracture closure pressure and time are determined by adding particulate matter that discharges to create an acoustic signal to the proppant, allowing the particulate matter to discharge, and detecting the acoustic signa... | 11/14/2006 |
| 7111558 | Pyrotechnic detonator with an igniter support of plastic with an integrated metal insert The invention relates to a pyrotechnic detonator with an igniter support of plastic, which bears an ignition element. A cylindrical metal housing is fastened to the igniter support, into which the ignition reaches. A booster charge is arranged in the metal housing. ... | 09/26/2006 |
| 7055421 | Well perforating gun A perforating device having a longitudinal axis comprising: a loading tube having an explosive charge; a first layer slidable, non fixedly, and removeably disposed over the loading tube; and at least one outer layer in fixed engagement over the first layer and where... | 06/06/2006 |
| 7047810 | Micro-electro-mechanical pressure sensor A pressure sensor is disclosed for measuring fluid pressure comprising a pressure sensing structure comprising a mass target suspended on a spring mechanism, wherein the mass target and the spring mechanism together exhibit high Q mechanical resonance, wherein the m... | 05/23/2006 |
| 7036432 | Explosive round with controlled explosive-formed fragments The invention provides an explosive round that produces fragments propelled by jetting effect, the round consisting in a firing head, an explosive charge, a fragment generating wall in direct contact with the explosive, which wall has a set of indentations extending... | 05/02/2006 |
| 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 |
| 6926096 | Method for using a well perforating gun The invention relates to a method to use a perforating gun in oil and natural gas wells, comprising: a perforating gun with a loading tube and explosive charge; the gun comprises: a first layer disposed over the loading tube and at least one outer layer in engagemen... | 08/09/2005 |
| 6792866 | Circular shaped charge A circular shaped charge and methods of manufacture, shipping and assembly. An circular shaped charge is manufactured as two separate charge halves, upper and lower, and a separate continuous liner or pair of continuous half liners. Preferably, each charge half is f... | 09/21/2004 |
| 6758124 | Unique phasings and firing sequences for perforating guns A unique phasing pattern is provided that maximizes the effective perforation geometry of a wellbore. The improvement overcomes the problems associated with multi-phase guns of the past that failed to account for the fact that the gun rested on the low side of the c... | 07/06/2004 |
| 6554081 | Components and methods for use with explosives An apparatus and method is provided to reduce interference resulting from activation of explosive devices. One type of interference is charge-to-charge interference, and another type of interference is pre-shock interference between a detonating cord and ... | 04/29/2003 |
| 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 |
| 6505559 | Well bore cutting and perforating devices and methods of manufacture A tubing and casing cutter is shown which can be assembled in the field from a plurality of pressed segmented pellets of free standing explosive material. The segmented pellets have a liner glued to at least one exposed face thereof. The pellets are glued... | 01/14/2003 |
| 6499406 | Blasting apparatus for forming horizontal underground cavities and blasting method using the same Disclosed herein is a blasting apparatus for forming horizontal underground cavities and blasting method using the same. The blasting apparatus includes a metallic body horizontally formed through the center portion of a loading chamber. A delayed detonat... | 12/31/2002 |
| 6494139 | Hole boring charge assembly A hole boring charge assembly suitable for explosively forming a wide borehole in a concrete target consists of a detonatable array of at least three hollow charges (12) having recessed, lined forward faces (14) facing towards the target in the same gener... | 12/17/2002 |
| 6397947 | Optimizing charge phasing of a perforating gun A method includes arranging shaped charges in a perforating gun to produce perforation holes in a helical pattern that is defined in part by a phase angle; and choosing four adjacent perforation holes to be created that are adjacent nearest neighbors. The... | 06/04/2002 |
| 6347673 | Perforating guns having multiple configurations A perforating gun system includes shaped charges and a carrier housing containing the shaped charges and having a pattern of scallops (or other forms of perforating jet passageways). The shaped charges have one of a plurality of arrangements with respect ... | 02/19/2002 |
| 6269725 | Fluid-filled bomb-disrupting apparatus and method An apparatus and method for disarming improvised bombs are disclosed. The apparatus comprises a fluid-filled bottle or container made of plastic or another soft material which contains a fixed or adjustable, preferably sheet explosive. The charge is fired... | 08/07/2001 |
| 6216596 | Zinc alloy shaped charge A shaped charge is shown with enhanced creep resistance for use in a perforating gun having an elongated spiral strip open to the wellbore through which the charges are attached. The shaped charge is a hollow bodied capsule and hollow bodied cap, both thr... | 04/17/2001 |
| 6167957 | Helical perforating gun A perforating gun for use in underground wells where the gun includes a forward guiding element and a rearward conveyancing element. These two elements are interconnected by way of a series of bow springs. In the preferred embodiment, the springs are spir... | 01/02/2001 |
| 5837925 | Shaped charge retainer system An apparatus and method for retaining shaped charges. A foam core having charge carrying recesses can be constructed from a single piece or from multiple sections. Shaped charges are insertable within the foam core recesses so that the shaped charges are ... | 11/17/1998 |
| 5816343 | Phased perforating guns A perforating gun having a base structure made of a deformable material. The base structure includes support rings integrally attached to one another by connector portions. The capsule charges are mounted in corresponding support rings, and each support r... | 10/06/1998 |
| 5785130 | High density perforating gun system A high density perforating gun having a carrier housing tube and an interior charge holder tube through which are mounted zinc alloy shaped charges in a phased relationship between about 135 and 145 degrees. The 135 to 145 degree phased relationship provi... | 07/28/1998 |
| 5619008 | High density perforating system A well perforating apparatus for generating a plurality of material perforating jets. A base has a plurality of recesses or apertures, and a liner is proximate to the base and is indented into each recess or aperture. Explosive charges contact the indente... | 04/08/1997 |
| 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 |
| 5542480 | Perforating gun with retrievable mounting strips A longitudinally slotted carrier having one end adapted for mounting on a tubing string, the carrier being nonplanar, with a slotted configuration and interior dimensions to enable capsule charge orientation at selected phases between 0 and 360 degrees. T... | 08/06/1996 |
