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| Number | Title | Issue Date |
| 8186259 | Perforating gun gravitational orientation system A perforating gun gravitational orientation system includes a perforating gun and a swivel device connected to the perforating gun to permit rotation of the perforating gun within casing, and the perforating gun spaced apart from the casing by the swivel device. Ano... | 05/29/2012 |
| 8136439 | Explosive well tool firing head A firing head embodiment of the invention confines a connected capacitance cartridge, explosive detonator, and wireline connection switch within an independent, cylindrical housing tube that is environmentally capped at both ends by threaded closures for secure tran... | 03/20/2012 |
| 8079296 | Device and methods for firing perforating guns A perforating gun train for perforating two or more zones of interest includes two or more gun sets made up of guns, one or more activators, and other associated equipment. An illustrative apparatus may include a first perforating gun; an activator responsive to the... | 12/20/2011 |
| 7975592 | Perforating apparatus, firing assembly, and method An apparatus for perforating a casing string including a first module and a second module, each including a gun assembly. The first module is positioned longitudinally adjacent the second module on the casing string. Each module contains a firing assembly for igniti... | 07/12/2011 |
| 7913603 | Device and methods for firing perforating guns A perforating gun train for perforating two or more zones of interest includes two or more gun sets made up of guns, detonators, and other associated equipment. In one embodiment, the gun sets are connected with connectors that can convey activation signals between ... | 03/29/2011 |
| 7806035 | Safety vent device A perforating gun system having a relief system for relieving high pressure during unexpected high temperature or situations that may produce rupture of the gun body. The relief system may be responsive either to high temperatures as well as high pressures. In the h... | 10/05/2010 |
| 7762172 | Wireless perforating gun A loading tube for installation in the body of a perforating gun is disclosed. The loading tube holds a plurality of shaped charges whose detonation is electrically initiated, and the loading tube, when installed in the body, comprises at least a portion of the elec... | 07/27/2010 |
| 7712406 | Method and device for activation of a detonator A method is described for detonation of a blasting charge in a fluid environment and which is placed inside a hollow body, such as in an ignition pellet. The method is characterised in that an ignition pellet is used, which is arranged to be deformed under the influ... | 05/11/2010 |
| 7698982 | Explosive pipe severing tool A pipe severing tool is arranged to align a plurality of high explosive pellets along a unitizing support structure whereby all explosive pellets are inserted within or extracted from a tubular housing as a singular unit. Electrically initiated exploding wire detona... | 04/20/2010 |
| 7607379 | Perforation gun system for sealing perforation holes A perforation gun includes an external gun barrel in the interior of which perforators are located which can be ignited via a fuse extending through the gun barrel and which, after ignition, pierce the gun barrel with perforation holes. A sliding tube or a swellable... | 10/27/2009 |
| 7591212 | Connector for perforating gun tandem A perforating gun connector comprising a first and second section connected together on one end. The two sections of the perforating gun connector that couple together are correspondingly tapered so that one end of one connector is tapered and fits into the correspo... | 09/22/2009 |
| 7461580 | Casing conveyed well perforating apparatus and method Disclosed is a casing conveyed perforating system and methods for externally perforating a wellbore and casing. The perforating system is attached to the outside of the casing and is conveyed along with the casing when it is inserted into the wellbore. The perforati... | 12/09/2008 |
| 7431075 | Propellant fracturing of wells A propellant assembly for fracturing a formation around a well includes a propellant and a detonating cord wrapped around the propellant, the detonating cord to ignite the propellant upon detonation of the detonating cord. Alternatively, the propellant can include a... | 10/07/2008 |
| 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 |
| 7360487 | Connector for perforating gun tandem A perforating gun connector comprising a first and second section connected together on one end. The two sections of the perforating gun connector that couple together are correspondingly tapered so that one end of one connector is tapered and fits into the correspo... | 04/22/2008 |
| 7350448 | Perforating apparatus, firing assembly, and method A firing assembly for activating a perforating device comprising a module having a first chamber and a second chamber. The firing assembly comprises a firing head for transferring ballistic energy to the perforating device, said firing head having a detonator and a ... | 04/01/2008 |
| 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 |
| 7237487 | Low debris perforating gun system for oriented perforating Disclosed herein is a reinforcing system for a shaped charge assembly for use in a perforating gun. The shaped charge assembly includes a shaped charge combined with a longitudinal reinforcing system extending along a portion of a perforating gun barrel. The reinfor... | 07/03/2007 |
| 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 |
| 7228902 | High data rate borehole telemetry system A system and method for communicating information between downhole equipment in a wellbore and surface equipment, comprising a first device disposed in a wellbore for receiving at least one first signal and transmitting at least one second signal. A surface device i... | 06/12/2007 |
| 7204308 | Borehole marking devices and methods To reduce the surveying error in a wellbore, the creation of several reference points within a borehole is carried out by physically placing borehole markers in the borehole casing, the borehole wall or in the formation itself, and providing an accurate reference of... | 04/17/2007 |
| 7195066 | Engineered solution for controlled buoyancy perforating The weight of a shaped charge carrier is predetermined as a buoyancy control parameter for perforating guns. Each charge carrier comprises a co-axial assembly of inner and outer carrier units. Both carrier units may be fabricated from low density metals or composite... | 03/27/2007 |
| 7159657 | Shaped charge loading tube for perforating gun The loading tube comprises cups forming cup cavities for enclosing an explosive charge within each of the cups. The loading tube has ridges and valleys providing longitudinal and lateral strength to the loading tube. The loading tube is constructed of a formed mater... | 01/09/2007 |
| 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 |
| 7090007 | Centralizer for wireline tools A centralizer for use in oil well wireline toolstrings comprising a central mounting rod and floating spring mechanisms between which a number of jointed centralizer arms are connected. The jointed centralizer arms have a section with a concave profile disposed near... | 08/15/2006 |
| 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 |
| 6978848 | Method and apparatus for penetrating subsurface formations A method and apparatus for driving at least one explosive driven projectile into an open hole or well bore of a subterranean formation for the purpose of stimulating productive formation. The apparatus is capable of pivoting within the open hole or well bore for des... | 12/27/2005 |
| 6966378 | Method and apparatus for perforating a well The present invention provides for a perforating gun having stackable sections that latch, enabling the gun string to carry both compressive and tensile loads. This allows for the downhole assembly of guns of any desired length, and for the entire gun string to be r... | 11/22/2005 |
| 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 |
| 6925924 | Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator A non-linear shaped charge perforator for use in perforating an oil and gas formation into which a wellbore has been drilled comprises a monolithic, axisymmetric metal case in which is disposed a main explosive charge between the front of the case, which is closed w... | 08/09/2005 |
| 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 |
| 6865978 | Well perforating gun The borehole of many wells, including oil and gas production wells, is frequently cased with a steel or similar metal casing. In order to extract oil or other material existing within the surrounding geologic formation, it is necessary to puncture the casing. Curren... | 03/15/2005 |
| 6779605 | Downhole tool deployment safety system and methods A safety system controls the activation of one or more downhole tools by providing selective transmission of an activation signal or an energy stream. In a preferred embodiment, transmission of the activation signal or the energy stream is allowed after the tool has... | 08/24/2004 |
| 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 |
| 6748843 | 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... | 06/15/2004 |
| 6742602 | 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 ... | 06/01/2004 |
| 6658981 | Thru-tubing stackable perforating gun system and method for use A stackable thru-tubing perforating gun system for use in perforating in a large diameter cased wellbore below a smaller diameter production tubing string. The system comprises a thru-tubing retrievable bridge plug for supporting a lower perforating gun s... | 12/09/2003 |
| 6591731 | Method and apparatus for penetrating hard materials using a energetic slurry A method and apparatus for drilling and penetrating hard materials utilizes a high velocity gun system that fires multiple shots of a projectile and an energetic slurry at the surface of the material to be penetrated. The penetrating device includes one o... | 07/15/2003 |
