Concave-shaped Charge Patents (Class 175/4.6)
  • Patent number: 9441438
    Abstract: A perforating gun assembly used to form perforations in a wellbore includes a charge carrier having a longitudinal axis, and multiple groups of shaped charges that are disposed on the charge carrier. Two or more of the shaped charges within each group are arranged to generate jets oriented substantially along respective axes that converge towards one another. Also, two or more of the groups of shaped charges overlap one another in a longitudinal direction of the charge carrier.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: September 13, 2016
    Assignee: DELPHIAN BALLISTICS LIMITED
    Inventors: Simon Douglas Eardly Allison, Jörn Olaf Löhken, Liam McNelis
  • Patent number: 9291039
    Abstract: A shaped charge includes a casing defining an interior volume, wherein the casing is prepared by sintering a metal powder or a mixture of metal powders; a liner located in the interior volume; and an explosive between the liner and the casing. A method for manufacturing a shaped charge casing includes the steps of mixing a metal powder or a metal powder mixture with a binder to form a pre-mix; pressing the pre-mix in a mold to form a casing green body; heating the casing green body to a first temperature to vaporize the binder; raising the temperature to a second temperature in an inert or reducing atmosphere to sinter the metal powder or the metal powder mixture to produce the shaped charge casing.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: March 22, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Allan W. King, Richard Caminari
  • Patent number: 9284824
    Abstract: Methods and apparatus are presented for a “disappearing” perforator gun assembly. In a preferred method of perforating a well casing, inserted into the well casing is a tubing conveyed perforator having an outer tubular made from a metallic glass alloy having high strength and low impact resistance. An inner structure is positioned within the outer tubular and holds one or more explosive charges. Upon detonating the explosive charges, the outer tubular is fragmented. The inner structure is preferably also substantially destroyed upon detonation of the one or more explosive charges. For example, the inner structure can be made from a combustible material, corrodible, dissolvable, etc., material. A disintegration-enhancing material is optionally positioned between the outer tubular and the inner structure. Additional embodiments are presented having gun housings which dematerialize upon detonation of the charges.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: March 15, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Javier Fadul, Paul Herman, Paul Ringgenberg, Randy Moore, Michael Fripp, Dennis Crowdis, John Hales, Bryan Powell
  • Patent number: 9238956
    Abstract: A perforating gun apparatus includes a carrier gun body having a plurality of jet target regions. A first set of the jet target regions has a first resistance to jet penetration and a second set of the jet target regions has a second resistance to jet penetration. A charge holder is positioned within the carrier gun body. A plurality of shaped charges is supported by the charge holder. A first set of the shaped charges is oriented to have discharge ends aligned with the first set of the jet target regions and a second set of the shaped charges is oriented to have discharge ends aligned with the second set of the jet target regions such that firing the first set of the shaped charges creates perforations having a first penetration profile and firing the second set of the shaped charges creates perforations having a second penetration profile.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: January 19, 2016
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Samuel Martinez
  • Patent number: 9065201
    Abstract: An electrical connector module is for completing an electrical connection in a wellbore device. The module has an outer surface having at least one groove that receives and frictionally retains an electrical wire in a circuitous path that relieves strain on the wire. An electrical connector is at least partially disposed in the at least one groove and is connected to the electrical wire.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: June 23, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Christine Borgfeld, John E. Fuller, Robert F. Morton
  • Patent number: 9038521
    Abstract: A geological perforating tool (gun) shape charges disposed at an angle that provides an improvement over other known embodiments by accurately securing the charges in the tool to facilitate reliable, reproducible focus of the shaped charges. Charges are disposed on metal strips fitted into slots that are precision cut at predetermined angles in a tool barrel circumference.
    Type: Grant
    Filed: February 8, 2014
    Date of Patent: May 26, 2015
    Assignee: GEODYNAMICS, INC.
    Inventors: James A. Rollins, Kevin R. George, Nathan Clark
  • Patent number: 8967257
    Abstract: Methods and apparatus are presented for a “disappearing” perforator gun assembly. In a preferred method of perforating a well casing, inserted into the well casing is a tubing conveyed perforator having an outer tubular made from a metallic glass alloy having high strength and low impact resistance. An inner structure is positioned within the outer tubular and holds one or more explosive charges. Upon detonating the explosive charges, the outer tubular is fragmented. The inner structure is preferably also substantially destroyed upon detonation of the one or more explosive charges. For example, the inner structure can be made from a combustible material, corrodible, dissolvable, etc., material. A disintegration-enhancing material is optionally positioned between the outer tubular and the inner structure. Additional embodiments are presented having gun housings which dematerialize upon detonation of the charges.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 3, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Javier Fadul, Paul Herman, Paul Ringgenberg, Randy Moore, Michael Fripp, Dennis Crowdis, John Hales, Bryan Powell
  • Patent number: 8960289
    Abstract: A combined fracturing and perforating method and device for oil and gas well are disclosed. The method utilizes an explosion of a perforating charge (5) in a combined fracturing perforator to ignite primary gunpowder in the perforator, and burning of the primary gunpowder ignites secondary gunpowder in the perforator. The body of the perforating gun in the combined fracturing and perforating device is provided with pressure releasing hole (8) which is directly facing the jet direction of said perforating charge, and sealing sheet (9) is arranged on said pressure releasing hole (8). Inner gunpowder box (6), which contains the primary gunpowder, and outer gunpowder box (7), which contains the secondary gunpowder, are mounted on the cylindrical charge frame (4).
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: February 24, 2015
    Assignee: Tong Oil Tools Co., Ltd.
    Inventors: Guoan Zhang, Jianlong Cheng, Xianhong Sun
  • Patent number: 8919444
    Abstract: An apparatus for perforating a subterranean formation may include a casing, an energetic material, a liner, and an acid-generating material. The casing may have a slotted end configured to receive a detonator cord, and an open end. The energetic material may be disposed in the open end and in ballistic. The liner may enclose the open end, and the liner may include an acid-generating material that is configured to form an acid upon detonation of the explosive material.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: December 30, 2014
    Assignee: Owen Oil Tools LP
    Inventors: Matthew Clay, James Talavera
  • Patent number: 8919253
    Abstract: A perforating system that transfers a detonation wave between adjacent perforating guns by converting shockwave energy to electrical energy. An explosive is provided on an end of a detonating cord that is coupled to shaped charges, so that a detonation wave traveling in the detonation cord will initiate detonation in the shaped charges and then in the high explosive. The explosive is disposed adjacent a pair of members that are energized so that a magnetic field is formed between the members. When the explosive detonates, the resulting shock wave pushes one of the members into the space between the members to compress the magnetic field. Compressing the magnetic field produces an electrical potential usable to initiate a detonation wave in another detonating cord for perpetuating the detonation wave along the perforating system.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: December 30, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Tim W. Sampson, William Harvey
  • Patent number: 8807003
    Abstract: A method comprises providing a gun string assembly within a wellbore and perforating the wellbore using the gun string assembly. The gun string assembly comprises a plurality of perforating guns coupled in series. A first perforating gun of the plurality of perforating guns comprises a first portion of shaped charges, and a second perforating gun of the plurality of perforating guns comprises a second portion of shaped charges operably associated with a secondary pressure generator. The first perforating gun and the second perforating gun are configured in the gun string assembly to provide a pressure transient comprising one or more pressures at a location in the wellbore that meet one or more thresholds.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: August 19, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Cam Van Le, Darren Ross Barlow, Jeffrey Alan Nelson
  • Patent number: 8763532
    Abstract: An apparatus and method for perforating a subterranean formation is disclosed. The apparatus includes a tubular carrier; a charge tube disposed in the tubular carrier; and at least one shaped charge mounted in the charge tube which includes a casing, an explosive material and a liner enclosing the explosive material within the casing. An apex portion of the liner has a cross-sectional thickness greater than a cross-sectional thickness of any other portion of the liner. The cross-sectional thickness of the apex portion may be at least fifty percent thicker than a cross-section of a portion adjacent the apex portion. A density of the apex portion may be greater than the density of any other portions of the liner.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: July 1, 2014
    Assignee: Owen Oil Tools LP
    Inventors: Zeping Wang, Dan Pratt, Paul Noe
  • Patent number: 8746331
    Abstract: A rust resistant well perforating gun to fractionate a formation adjacent a well can include a gun carrier with recesses, threaded sections, seal bores, and a first coating to prevent rust. The rust resistant well perforating gun can have a charge loading tube for slidably engaging with the gun carrier. The charge loading tube can have charge holes, rear charge holes, end caps, and a second coating to prevent rust.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: June 10, 2014
    Inventors: Edward Cannoy Kash, James Edward Kash
  • Patent number: 8739673
    Abstract: A method comprises: a. determining a configuration of a gun string, b. determining, by a computer, a pressure transient at a location in a wellbore, c. comparing the one or more pressures with the one or more pressure thresholds at the location, and d. perforating the wellbore with the gun string using the determined configuration of the gun string when the one or more pressures meet the one or more pressure thresholds at the location. The location in the wellbore has one or more pressure thresholds, and the pressure transient comprises one or more pressures.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: June 3, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Cam Van Le, Darren Ross Barlow, Jeffrey Alan Nelson
  • Patent number: 8584772
    Abstract: A shaped charge includes a charge case; an explosive disposed inside the charge case; and a liner for retaining the explosive in the charge case, wherein the liner comprises a material reactive with a component of an earth formation. A method for perforating in a well includes disposing a perforating gun in the well, wherein the perforating gun comprises a shaped charge having a charge case, an explosive disposed inside the charge case, and a liner for retaining the explosive in the charge case, wherein the liner includes a material that can react with a component of an earth formation; detonating the shaped charge to form a perforation tunnel in a formation zone; and allowing the material comprising the liner to react with the component of the earth formation.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: November 19, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Wenbo Yang, Lawrence A. Behrmann
  • Patent number: 8561683
    Abstract: An apparatus and a method for cutting a wellbore tubular may include an upper section and a lower section mating at a juncture plane defined by a plane transverse to the longitudinal axis of the wellbore tubular. Each section may include a support plate having a passage, a liner positioned adjacent to the support plate, and an energetic material disposed between the support plate and the liner. An initiator having a shaft may be positioned in the passages of the upper section and the lower section.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: October 22, 2013
    Assignee: Owen Oil Tools, LP
    Inventors: Jeffrey D. Wood, Timothy Edward LaGrange, Matthew Clay
  • Patent number: 8555764
    Abstract: A downhole tool gun string assembly comprises a first perforating gun operable to generate a first pressure at a first location in a wellbore, wherein the first perforating gun comprises a first plurality of perforating charges; a second perforating gun operable to generate a second pressure at a second location in the wellbore, wherein the second pressure is different from the first pressure and the second perforating gun comprises a second plurality of perforating charges, and wherein at least one of the second plurality of perforating charges is operably associated with a secondary pressure generator, where the first perforating gun and the second perforating gun are configured to maintain a pressure at a selected location in the wellbore below a threshold when the first and second perforating guns are activated substantially concurrently.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: October 15, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Cam Van Le, Darren Ross Barlow, Jeffrey Alan Nelson
  • Patent number: 8544563
    Abstract: An oil and gas well shaped charge perforator capable of providing an exothermic reaction after detonation is provided, having a housing, a high explosive, and a reactive liner where the high explosive is positioned between the reactive liner and the housing. The reactive liner is produced from a composition which is capable of sustaining an exothermic reaction during the formation of the cutting jet.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: October 1, 2013
    Assignee: Qinetiq Limited
    Inventors: Brian Bourne, Nathan G Clark
  • Publication number: 20130048376
    Abstract: A perforating gun can include at least one explosive component, and a shock mitigation device including a shock reflector which indirectly reflects a shock wave produced by detonation of the explosive component. Another perforating gun can include a gun housing, at least one explosive component, and a shock mitigation device in the gun housing. The shock mitigation device can include a shock attenuator which attenuates a shock wave produced by detonation of the explosive component. Yet another perforating gun can include a shock mitigation device with an explosive material which produces a shock wave that interacts with another shock wave produced by detonation of an explosive component in a gun housing.
    Type: Application
    Filed: June 26, 2012
    Publication date: February 28, 2013
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: John P. RODGERS, Timothy S. GLENN, Marco SERRA, Edwin A. EATON, John D. BURLESON, John H. HALES
  • Publication number: 20130048375
    Abstract: A perforating gun can include at least one explosive component, and a shock mitigation device including a shock reflector which indirectly reflects a shock wave produced by detonation of the explosive component. Another perforating gun can include a gun housing, at least one explosive component, and a shock mitigation device in the gun housing. The shock mitigation device can include a shock attenuator which attenuates a shock wave produced by detonation of the explosive component. Yet another perforating gun can include a shock mitigation device with an explosive material which produces a shock wave that interacts with another shock wave produced by detonation of an explosive component in a gun housing.
    Type: Application
    Filed: June 11, 2012
    Publication date: February 28, 2013
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: John P. RODGERS, Timothy S. GLENN, Marco SERRA, Edwin A. EATON, John D. BURLESON, John H. HALES
  • Patent number: 8342094
    Abstract: A shaped charge includes a charge case; a liner; an explosive retained between the charge case and the liner; and a primer core disposed in a hole in the charge case and in contact with the explosive, wherein at least one of the case, the liner, the primer core, and the explosive comprising a material soluble in a selected fluid. A perforation system includes a perforation gun, comprising a gun housing that includes a safety valve or a firing valve, wherein the safety valve or the firing valve comprises a material soluble in a selected fluid.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: January 1, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Manuel P. Marya, Wenbo Yang, Lawrence A. Behrmann, Steven W. Henderson, Robert Ference
  • Patent number: 8336437
    Abstract: A perforating gun assembly for use in a wellbore. The perforating gun assembly includes a carrier gun body and a charge holder disposed within the carrier gun body. A plurality of shaped charges are supported within the carrier gun body. A secondary pressure generator is operably associated with at least one of the shaped charges. The secondary pressure generator optimizes the wellbore pressure regime immediately after detonation of the shaped charges by controlling the dynamic underbalance created by the empty gun chambers to prevent excessive dynamic underbalance which may detrimentally effect the perforating operation.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: December 25, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Darren Ross Barlow, Cam Van Le, James Marshall Barker
  • Patent number: 8276656
    Abstract: A perforating gun, according to one or more aspects of the present disclosure, comprises a loading tube and a plurality of charges mounted in the loading tube with at least a portion of the plurality of charges being tilted relative to an axis of the loading tube. Wherein the plurality of tilted charges are tilted relative to the axis to create a selected reactive dynamic force on the perforating gun to counter a detrimental force on the perforating gun in response to detonation of the plurality of charges.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: October 2, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Kenneth R. Goodman
  • Patent number: 8167044
    Abstract: A perforating apparatus that is usable with a well includes a shaped charge. The shaped charge includes a case, an explosive and a liner. The liner is adapted to form a perforation jet to form a perforation tunnel and promote an exothermic reaction inside the tunnel to create a pressure wave to force debris from the tunnel.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: May 1, 2012
    Assignee: Sclumberger Technology Corporation
    Inventors: Hongfa Huang, Brenden M. Grove, Philip Kneisl
  • Patent number: 8074737
    Abstract: A perforating system and method for wellbore perforating. The system comprises a perforating string having a perforating gun with shaped charges, a communication module for receiving detonation signals, and a controller associated with each perforating gun. The module receives surface signals for gun detonation and wirelessly transmits the signals to selected guns via the associated controllers.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: December 13, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Freeman L. Hill, Gary J. Cresswell, David M. Chace, Randy L. Evans
  • Patent number: 8061425
    Abstract: A perforating apparatus (240) used to perforate a subterranean well. The perforating apparatus (240) includes a generally tubular gun carrier (106) and a charge holder (242) rotatably mounted within the gun carrier (106). At least one shaped charge (246) is mounted in the charge holder (242) and is operable to perforate the well upon detonation. A dynamically adjustable weight system including a weight tube (250) that is selectively rotatable relative to the charge holder (242) is operable to adjust the center of gravity (120) of the charge holder (242) such that gravity will cause the charge holder (242) to rotate within the gun carrier (106) to position the at least one shaped charge (246) in a desired circumferential direction relative to the well prior to perforating.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: November 22, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John H. Hales, Allison E. Novak, John D. Burleson
  • Patent number: 7997353
    Abstract: An apparatus for perforating wells has perforating charges and a means for retaining the perforating charges in a first array The first array has a first maximum cross sectional area; and means for expanding the perforating charges into a second three dimensional array The second array has a second maximum cross sectional area larger than the first maximum cross sectional area. Also an apparatus for perforating wells has a plurality of perforating charges and a means for retaining the perforating charges in a first array The first array has a primary axis and a first maximum cross sectional area and the perforating charges having firing directions oriented approximately perpendicular to the primary axis; and means for expanding the perforating charges into a second array, the second array has a second maximum cross sectional area larger than the first.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: August 16, 2011
    Assignee: Schlumberger Technology Corporation
    Inventor: Luis Ochoa
  • Patent number: 7987911
    Abstract: An oil and gas well shaped charge perforator is provided comprising a housing, a high explosive, and a liner with a further insert liner where the high explosive is positioned between the liner and the housing. In use the high explosive will collapse the liner and insert causing two cutting jets to form. The insert may substantially cover the surface area of the liner or it may over only partially cover the liner, such as the apical portion of the liner or the base portion of liner. Alternatively the insert may be varied in thickness across the surface area of the liner. Typically the thickness of the liner may be between 1 and 10% of the liner diameter and the thickness of the insert may be between 1 and 200% of the thickness of the liner. The insert may be produced during the manufacture of the liner, but preferably the liner will be a retro fitted item.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: August 2, 2011
    Assignee: Qinetiq Limited
    Inventors: Mark R Rhodes, Stephen Wheller, Anthony J Whelan, Michael R Hoar, Neil Cole
  • Patent number: 7934558
    Abstract: A perforating apparatus (100) used to perforate a subterranean well. The perforating apparatus (100) includes a generally tubular gun carrier (106) and a charge holder (104) rotatably mounted within the gun carrier (106). At least one shaped charge (102) is mounted in the charge holder (104) and is operable to perforate the well upon detonation. A dynamically adjustable weight system (124) is operably associated to the charge holder (104). The dynamically adjustable weight system (124) is operable to adjust the center of gravity (120) of the charge holder (104) such that gravity will cause the charge holder (104) to rotate within the gun carrier (106) to position the at least one shaped charge (102) in a desired circumferential direction relative to the well prior to perforating.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: May 3, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John H. Hales, Allison E. Novak, John D. Burleson
  • Patent number: 7913761
    Abstract: A method for perforating a subterranean formation includes positioning a shaped charge and a reactant composite material in a carrier; positioning the carrier in the wellbore; detonating the shaped charge; and disintegrating the reactant composite material using a shock generated by the detonated shaped charge. The method may also include initiating a first deflagration by using carbon and heat resulting from the detonation of the shaped charge and an oxygen component of the disintegrated reactant composite material. A system for performing the method may include a carrier, a shaped charge positioned in the carrier; and a reactant composite material positioned in the carrier. The reactant composite material may be configured to disintegrate upon detonation of the shaped charge.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: March 29, 2011
    Assignee: Owen Oil Tools LP
    Inventors: Dan Pratt, Joseph Haney, Thomas C. Montanez, Matthew Clay
  • Patent number: 7909115
    Abstract: A shaped charge includes: a charge case; an explosive disposed inside the charge case; and a liner for retaining the explosive in the charge case, wherein the liner is fabricated from a material soluble with a selected dissolving fluid (e.g., an acid, an acid matrix, an injection fluid, a completion fluid, and/or a wellbore fluid). A method for perforating in a well includes the steps of: disposing a perforating gun in the well, wherein the perforating gun comprises a shaped charge having a charge case, an explosive disposed inside the charge case, and a liner for retaining the explosive in the charge case, wherein the liner is fabricated from a material soluble with a selected dissolving fluid; detonating the shaped charge to form a perforation tunnel in a formation zone; and exposing the material comprising the liner to the selected dissolving fluid.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: March 22, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Brenden Grove, Ian Walton, Lawrence A. Behrmann
  • Patent number: 7828051
    Abstract: An improved perforating gun having a tubular housing, a tubular carrier and a charge carried by the tubular carrier. The tubular carrier comprises an inside diameter, an outside diameter and an opening disposed between the inside diameter and the outside diameter. The charge comprises a forward end positioned in the opening between the inside diameter and the outside diameter. The tubular carrier increases a collapsible-pressure rating for the housing and positions the charge closer to the formation.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: November 9, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Jerry L. Walker
  • Publication number: 20100252323
    Abstract: A process is disclosed for assembling a loading tube for a perforating gun for use in a perforating system. At a first location, e.g., a shop, which is not the location at which perforating operations will be conducted, the loading tube is completely assembled. The completely assembled loading tubing is then transported to a second location where perforating operations are to be conducted. In one embodiment, an RF-safe initiator, wiring, a detonating cord and a plurality of shaped charges are installed into the loading tube at a first location. The RF-safe initiators may comprise an exploding foil initiator or an exploding bridge wire. A process for assembling a loading tube for a single-shot perforating gun is also disclosed.
    Type: Application
    Filed: June 15, 2010
    Publication date: October 7, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kenneth Goodman, Luis Ochoa
  • Patent number: 7770662
    Abstract: A shaped charge assembly for use in a perforating gun that comprises a shaped charge holder, two or more shaped charges, slots formed to receive the shaped charges, and an impedance barrier disposed between adjacent shaped charges. The impedance barrier can comprise a gap formed in the shaped charge holder, where the impedance barrier runs across the shaped charge holder. The impedance barrier can be a void formed on the surface of the shaped charge holder, or can include shock attenuating material therein, such as wood, cork, cotton, polymeric materials, and combinations thereof, to name a few.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: August 10, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: William Harvey, Meir Mayseless, Anna Schwartz, Timothy Sampson, Mark Sloan, Jason McCann, Avigdor Hetz
  • Patent number: 7762351
    Abstract: The perforation gun is comprised of a tubular carrier, a charge holder, a plurality of sealed charges, and a detonating cord. The tubular carrier has a length and a plurality of openings. The charge holder has a length and is comprised of a plurality of mounting locations which are each capable of receiving one of the sealed charges. The charge holder is capable of being secured within the carrier. The detonating cord is coupled to at least one sealed charge. In the mounted position and when the charge holder is secured within the carrier, the charges are aligned with the openings in the carrier such that, upon detonation, charge blasts emitted from the charges exit though the carrier openings and perforate a well casing and cement. In one aspect of the invention, the carrier openings are spirally arranged and spaced along the length of the carrier. In still another aspect of the invention, the openings are vertically arranged and spaced along the length of the carrier.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: July 27, 2010
    Inventor: Mirabel Vidal
  • Patent number: 7752971
    Abstract: A shaped charge for use with a perforating gun having an adapter that can couple the shaped charge with perforating gun systems of more than one size. An interference fit can couple the adapter to the open end of a shaped charge. The adapter includes a base section having an outer diameter exceeding the shaped charge outer diameter. The adapter larger diameter can be coupled to perforating gun systems formed to receive shaped charges whose outer diameters exceed the outer diameter of the shaped charge coupled to the adapter. Thus the adapter can couple a shaped charge to a perforating gun that might otherwise have fittings too large to accommodate the shaped charge.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: July 13, 2010
    Assignee: Baker Hughes Incorporated
    Inventor: John D. Loehr
  • Patent number: 7735578
    Abstract: A perforating gun having a charge case with a boss element partially circumscribing Optionally the pair of bosses may be included that are substantially symmetric about the axis of the charge case. Forming a shaped charge with such a charge case allows for gun strips to be formed with increased web material between adjacent shape charges in the gun strips. The increased web material provides for a more structurally sound gun tube, especially when dealing with high density charges. Notches may be provided in the gun tube on the outer radius of the holes formed to receive the shape charges, the notches are to be aligned with the bosses on the outer periphery of the shaped charge case. This also may orient the charge cases so they are pre-aligned for ready connection to an associated detonation cord.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: June 15, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: John D. Loehr, Patrick R. Markwardt
  • Patent number: 7621342
    Abstract: 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 (106) contains the shaped charges (102). The carrier (106) includes at least one discharge location corresponding to the discharge ends of the shaped charges (102) when the perforating apparatus (100) is in its operable position. The discharge location has first and second material layers (122, 124) wherein the second material layer (124) exhibits resilient recovery such that an opening created by a jet formed from detonating one of the shaped charges (102) in the second material layer (124) is smaller than an opening created by the jet in the first material layer (122), thereby retaining debris in the perforating apparatus (100) with the second material layer (124).
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: November 24, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Jerry L. Walker
  • Patent number: 7610969
    Abstract: A carrier tube for use in a wellbore perforating gun has inner and outer layers selected from materials of different, comparative physical properties. The inner layer has a higher compressive strength, and the outer layer has a higher yield strength. The inner layer enables the tube to withstand wellbore compressive pressures, which may, depending upon the material selected, include relatively high pressures, while the outer layer contains any fragments of the inner layer that result upon detonation of the gun. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: November 3, 2009
    Assignee: Owen Oil Tools LP
    Inventors: Timothy Edward LaGrange, Dan W. Pratt, Jeffrey Michael West, Lesley Alan Weisner, Christopher Hoelscher
  • Patent number: 7493958
    Abstract: A technique that is usable with a well includes running a production string into the well so that the production string extends through a first isolated zone of the well and at least into a second isolated zone that is located farther into the well than the first isolated zone. The production string includes integrated perforating charges. The technique also includes firing the perforating charges inside the first zone; and after the firing, maintaining fluid isolation between the first isolated zone and a passageway of the production string. The passageway communicates well fluid from the second isolated zone.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: February 24, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: Joe C. Hromas, Larry Grigar
  • Publication number: 20090038846
    Abstract: An improved perforating gun having a tubular housing, a tubular carrier and a charge carried by the tubular carrier. The tubular carrier comprises an inside diameter, an outside diameter and an opening disposed between the inside diameter and the outside diameter. The charge comprises a forward end positioned in the opening between the inside diameter and the outside diameter. The tubular carrier increases a collapsible-pressure rating for the housing and positions the charge closer to the formation.
    Type: Application
    Filed: August 6, 2007
    Publication date: February 12, 2009
    Inventor: Jerry L. Walker
  • Patent number: 7430965
    Abstract: 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 (106) contains the shaped charges (102). The carrier (106) includes at least one discharge location corresponding to the discharge ends of the shaped charges (102) when the perforating apparatus (100) is in its operable position. The discharge location has first and second material layers (122, 124) wherein the second material layer (124) exhibits resilient recovery such that an opening created by a jet formed from detonating one of the shaped charges (102) in the second material layer (124) is smaller than an opening created by the jet in the first material layer (122), thereby retaining debris in the perforating apparatus (100) with the second material layer (124).
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: October 7, 2008
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Jerry L. Walker
  • Publication number: 20080202755
    Abstract: A well completion method and apparatus comprises a pipe string having a bottom attached boring bit and scraper or reamer. Above the bit at designated well fluid production locations, perforation assemblies are integrated into the pipe string. Each perforation assembly comprises a by-pass circulation mandrel and a perforation gun. The circulation mandrel and perforation gun are both secured to respective arms of a Y-adapter. The Y-adapter leg receives the pin end of a traditional drill or production pipe. In one downhole trip, the wellbore casing may be scraped and the bottom-hole cement plug drilled out. Without removing the pipe string, the wellbore is flushed by a circulation of clean fluid down the pipe string bore, through the circulation mandrels and out the bit tooth cleaning jets into the wellbore annulus. Subsequently, the wellbore pressure is raised to detonate casing perforating shaped charges in the perforating gun.
    Type: Application
    Filed: February 28, 2007
    Publication date: August 28, 2008
    Inventors: Joseph Albert Henke, Keith Alan Maxey, Charles Wayne Harrell
  • Publication number: 20080134925
    Abstract: A shaped charge assembly (10) comprises a housing (20), first shaped charge (24), a wave shaping relay charge (44) and a second shaped charge (30) located in the housing. The assembly (10) is configured such that a first active element formed by initiation of the first shaped charge (24) causes detonation of the wave shaping relay charge (44), which in turn causes initiation of the second shaped charge (30) to form a second active element. The first active element moves beyond a second end (25) of the housing to cause damage of a first kind to an external target and the second active element also moves beyond the second end to cause damage of a second kind to the target.
    Type: Application
    Filed: February 23, 2006
    Publication date: June 12, 2008
    Inventor: Pieter Johann Konig
  • Patent number: 7360599
    Abstract: 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 energy absorbing charge holder (104) has a detonating cord receiving area to receive the detonating cord therein (116). The energy absorbing charge holder (104) also has a plurality of charge receiving locations that closely receive the shaped charges (102) therein such that upon detonation of the shaped charges (102), energy is transferred from the cases of the shaped charges (102) to the energy absorbing charge holder (104), thereby reducing fragmentation of the cases.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: April 22, 2008
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jerry L. Walker, Jim Gilbert
  • Patent number: 7360587
    Abstract: 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 energy absorbing charge holder (104) has a gas expansion region and a detonating cord receiving area to receive the detonating cord therein (116). The energy absorbing charge holder (104) also has a plurality of charge receiving locations that closely receive the shaped charges (102) therein such that upon detonation of the shaped charges (102), energy is transferred from the cases of the shaped charges (102) to the energy absorbing charge holder (104), thereby reducing fragmentation of the cases.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: April 22, 2008
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jerry L. Walker, Jim Gilbert
  • Patent number: 7350448
    Abstract: 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 plurality of ballistic charges, said detonator coupled to at least one of said first gun assembly and said second gun assembly a remote telemetry device for sending a detonation signal, a transmission medium for transmitting said detonation signal to said firing head, and a receiving device for receiving said detonation signal and a processor for interpreting said detonation signal and activating said detonator.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: April 1, 2008
    Assignee: Shell Oil Company
    Inventors: Matthew Robert George Bell, Eugene Murphy, Edward Paul Cernocky, Christopher Burres, Aron Ekelund, Allen Lindfors
  • Patent number: 7347279
    Abstract: An adapter is provided for holding and mounting a shaped charge having a non-standard size into a standard loading tube of a hollow carrier gun. The adapter may include a housing assembly having an interior bore to hold a relatively small shaped charge and an exterior surface sized for mounting in a standard loading tube via a standard jacket. Alternatively, the adapter may include an improved jacket having interior ribs for supporting a relatively small shaped charge and an exterior surface for mounting the shaped charge in a standard loading tube of a relatively large gun.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: March 25, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Haoming Li, Mark C. Duhon, Wanchai Ratanasirigulcha, Steven W. Henderson
  • Patent number: 7278484
    Abstract: A technique to install a tool in a well includes running the tool into the well and fixing the tool to the well with a fixing agent without pumping the fixing agent through a central passageway of the tool. The tool may be a perforating gun that includes a casing body that includes a longitudinal axis. The perforating gun may also include a fin and a perforating charge. The fin radially extends from the casing body, and the perforating charge is attached to the fin and is oriented to generate a perforation jet in a radial direction away from the longitudinal axis of the casing body.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: October 9, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Mark Vella, Joe C. Hromas, Bennie Gill, Larry Grigar, Steven W. Henderson
  • Patent number: 7237486
    Abstract: 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 with a retaining shell. A bushing is included between the outer radius of the casing the retaining shell. The bushing serves to absorb shock during detonation of the shaped charge and to help in orienting the shaped charges.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: July 3, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: William Myers, Jr., Timothy Sampson, James W. Reese, Avigdor Hetz