Independent Firing Of Plural Charges Patents (Class 175/4.55)
  • Patent number: 9291040
    Abstract: A wellbore select fire switch retaining member system and method with an integrated through wire and ground wire in a switch sub. The system/method includes a retaining member that has a form factor acceptable by a conventional switch sub. The retaining member incorporates an electrical connection to the center pin of a pressure switch. The system further includes a secondary piston aligned with a piston in the switch (switch piston) so that external pressure is fully acted upon the entire switch piston creating a reliable switch connection. Another system includes an integrated retaining member and switch module having a form factor compatible with existing switch subs. The integrated module inputs include a ground wire and a through wire and the outputs include a ground wire, through wire and an arming wire.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: March 22, 2016
    Assignee: GEODYNAMICS, INC.
    Inventors: John T. Hardesty, James A. Rollins
  • Patent number: 9127532
    Abstract: Fiber optic enabled casing collar locator systems and methods include a wireline sonde or a coil tubing sonde apparatus configured to be conveyed through a casing string by a fiber optic cable. The sonde includes at least one permanent magnet producing a magnetic field that changes in response to passing a collar in the casing string, a coil that receives at least a portion of the magnetic field and provides an electrical signal in response to the changes in the magnetic field, and a light source that responds to the electrical signal to communicate light along an optical fiber to indicate passing collars.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: September 8, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John L. Maida, Etienne M. Samson, David P. Sharp
  • Patent number: 9080433
    Abstract: A cartridge assembly for use with a perforating system having a contact terminal that connects to a perforating signal line when inserted into a receptacle end of a perforating gun. A detonator may be included in an end of the cartridge assembly for initiating a detonating cord in the perforating gun. The cartridge assembly is a modular unit that replaces the manual connections made when assembling a string of perforating guns. The cartridge assembly may optionally include a controller switch for controlling current flow through the cartridge assembly.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: July 14, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Ronald Lanclos, James Weekley, Jason McCann, Mark Sloan
  • Patent number: 8943944
    Abstract: This invention provides a structure for gunpowder charge in multi-frac composite perforation devices that is easy to assemble and transport while the charge volume of gunpowder is increased. In one embodiment of the present invention, an triplet outer gunpowder box is attached onto the outer wall of the charge frame and comprises one middle gunpowder box charged with gunpowder of certain burning rate, and two side-hung gunpowder boxes charged with gunpowder of another burning rate. The two side-hung gunpowder boxes are separately located on the two sides of the middle gunpowder box and are connected with the middle gunpowder box as a unit. The middle gunpowder box is located at a position corresponding to the perforating charge, and has an inner groove for orienting the perforating charge and a through hole through which the jet flow passes.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: February 3, 2015
    Assignees: Tong Oil Tools Co., Ltd, Tong Petrotech Inc
    Inventors: Guoan Zhang, Jianlong Cheng, Xianhong Sun
  • Patent number: 8943943
    Abstract: Explosive carrier end plates for charge-carriers utilized in guns for the perforation of petroleum producing wells. Each gun is mounted coupled vertically with similar guns inside the casing of the well, and each gun is a hollow cylinder in the interior of which there is a corresponding tubular carrier that has multiple peripheral mountings for a radial placement of the shaped-charges. The carrier is mounted in the gun by means of a top insulating end plate that has a retractable electrical spring contact capable of pushing upwards, and a bottom insulating end plate. The end plates have a centering clip for anchoring in a respective window of the cylindrical wall of the carrier. Both end plates have a single removable insert axially fitted between two tubular inserts, which present reciprocal guiding and positioning means for a pin-keyway slot to enable mounting with the end plate.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: February 3, 2015
    Assignee: Tassaroli S.A.
    Inventor: Carlos Jose Tassaroli
  • Patent number: 8763507
    Abstract: An isolation sub for use in a perforating system that includes a pressure activated firing head. The isolation sub is set between the pressure source that is used to initiate the firing head. A pressure regulator in the sub is responsive to fluctuations in pressure difference between the pressure source and wellbore and isolates the firing head when the pressure difference is at or approaches a designated pressure difference that could initiate the firing head. The pressure regulator includes a spring loaded piston that seals the firing head from the source pressure before the pressure difference activates the firing head.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: July 1, 2014
    Assignee: Baker Hughes Incorporated
    Inventor: Colby W. Ross
  • Patent number: 8714251
    Abstract: A perforation tool assembly comprises an energy train, a first perforation gun, and a second perforation gun. The energy train comprises a moderator to reduce the speed of propagation of a detonation in a direction parallel to the axis of the perforation tool assembly. The first perforation gun comprises a plurality of explosive charges coupled to a first portion of the energy train. The second perforation gun comprises a plurality of explosive charges coupled to a second portion of the energy train, wherein the second portion of the energy train is coupled to the first portion of the energy train.
    Type: Grant
    Filed: August 25, 2012
    Date of Patent: May 6, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Timothy S. Glenn, John P. Rodgers, Jeff A. Nelson, John D. Burleson, Marco Serra, John H. Hales
  • Patent number: 8517120
    Abstract: A perforation tool e.g. for perforation of a formation, a well or the like downhole by detonation of a charge. The perforation tool has at least one charge and at least one switch for detonation of the charge. The switch has a housing, at least one contact, a shaft having a first end with a fastening member enabling a slidable fastening of the shaft in a predetermined position in relation to the tool and a second end for extending into the housing, and a conductor provided on the shaft enabling an electrical current to be conducted between the contact and the for detonation of a charge when the shaft extends within the housing.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: August 27, 2013
    Assignee: Welltec A/S
    Inventor: Jørgen Hallundbaek
  • Patent number: 8393392
    Abstract: A bottom hole assembly for one trip perforating and treating a wellbore, the bottom hole assembly including: a tool body including an outer surface and an upper end; a fluid passage extending into the tool body from the upper end; a valve to provide (i) in one orientation fluid access from the fluid passage to an outlet port opening to the outer surface and (ii) in another orientation fluid access from the fluid passage to a perforating gun actuation fluid supply channel while sealing fluid access from the fluid passage to the outer surface; an annular sealing member encircling the outer surface below the outlet port; and a perforating gun carried below the resettable, annular sealing member and hydraulically actuable to detonate by fluid communication through the perforating gun actuation fluid supply channel.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: March 12, 2013
    Assignee: Integrated Production Services Ltd.
    Inventors: Terry Lee Mytopher, Nathan Coffey
  • Patent number: 8365824
    Abstract: A system for use in borehole completion is provided and includes a perforating sub, a firing sub having a first port and an interior and including a firing assembly disposable within the interior and operably coupled to the perforating sub and a drilling fluid barrier, which is formed with a second port and is displaceable toward a position at which the first and second ports align to form a fluid path through the interior that is sufficiently pressurizable to actuate the firing assembly, a drop plug selectively engageable with the drilling fluid barrier to enable displacement thereof to the position in response to applied pressures and an isolation sub, into which the drop plug is receivable following disengagement thereof from the drilling fluid barrier.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: February 5, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: James G. Phillips
  • Publication number: 20120318508
    Abstract: A perforation tool assembly is provided. The perforation tool assembly comprises an energy train, a first perforation gun, and a second perforation gun. The energy train comprises a moderator to reduce the speed of propagation of a detonation in a direction parallel to the axis of the perforation tool assembly. The first perforation gun comprises a plurality of explosive charges coupled to a first portion of the energy train. The second perforation gun comprises a plurality of explosive charges coupled to a second portion of the energy train, wherein the second portion of the energy train is coupled to the first portion of the energy train.
    Type: Application
    Filed: August 25, 2012
    Publication date: December 20, 2012
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Timothy S. Glenn, John P. Rodgers, Jeff A. Nelson, John D. Burleson, Marco Serra, John H. Hales
  • Patent number: 8281858
    Abstract: Application of the method and device to a water well will permanently seal the well casing in order to prevent hydraulic cross-contamination with other water wells in the area. The method employs a string to explosive modules in spaced relation along the depth of a well casing. This weighted string of explosive modules is lowered into the well casing, wet concrete should then be introduced into the casing, after which the explosive elements are detonated sequentially, starting at the top of the well. Detonation of the elements in such a manner should force the wet concrete or cement out through the well casing perforations, so that the well casing will be entirely captured within the cured concrete. The individual explosive elements are made from detonating cord and metallic ball bearings wrapped into bundles, and then the bundles are bound in suitable adhesive tape.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: October 9, 2012
    Inventor: Bradley J. Challacombe
  • Publication number: 20120168226
    Abstract: A detonator assembly is provided for use in oilfield operations to detonate an explosive downhole including a capacitor discharge unit and initiator electrically connected together to form a single unit. Further, provided is a method of fabricating an integrated detonator. Additionally, a method of use for an integrated detonating unit is provided.
    Type: Application
    Filed: September 26, 2011
    Publication date: July 5, 2012
    Inventors: James E. Brooks, Nolan C. Lerche, Anthony F. Veneruso
  • Patent number: 8157022
    Abstract: An apparatus string for use in a wellbore has a plurality of activation modules having first and second ends and containing devices to be activated/initiated downhole. An apparatus string also has a plurality of initiator modules where at least initiator is operatively connected to each activation module and is addressable. Each initiator module may have a safety initiator which when the initiator module is addressed initiates the firing of the shaped charges in the gun module to which it is operatively connected. A wireless transmitter is operatively connected in and integral to the apparatus string for use in transmitting signals to address any initiator module in the apparatus string.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: April 17, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael J. Bertoja, Luis Ochoa, Kenneth R. Goodman
  • 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: 7980309
    Abstract: A system (100) for selective activation of explosive devices (126, 128, 130, 132) includes a surface controller (102), a downhole controller (106) operable to communicate bidirectionally with the surface controller over a first communication link (108) and a plurality of downhole remote units (114, 116, 118, 120) operable to communicate bidirectionally with the downhole controller (106) over a second communication link (112). One or more sensors (162) are operably associated with the downhole controller (106) and one of the explosive devices (126, 128, 130, 132) is operably associated with each of the downhole remote units (114, 116, 118, 120) such that, responsive to a detonation event, the sensors (162) detect the intensity level of the detonation which is communicated from the downhole controller (106) to the surface control (102) over the first communication link (108).
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: July 19, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Donald L. Crawford
  • Patent number: 7975592
    Abstract: 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 igniting the gun assembly in the first module, a remote signaler to remotely detonate the firing assembly, and ballistic transfer assembly for igniting the gun assembly in the second module. The ballistic transfer assembly includes a booster charge.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: July 12, 2011
    Assignee: Shell Oil Company
    Inventors: Matthew Robert George Bell, Eugene Murphy, Edward Paul Cernocky, Christopher Burres, Aron Ekelund, Allen Lindfors
  • 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
  • Publication number: 20100147519
    Abstract: A wellbore tool string includes a perforating gun having a plurality of explosive perforating charges and a shock mitigation tool. The shock mitigation tool including a tubular body having a top end, a bottom end, and a chamber; a barrier disposed proximate the bottom end in communication with the chamber; and a plurality of actuators connected with the body proximate to the top end of the body, each actuator opening a port in the body providing fluid communication with the chamber when the plurality of actuators are activated.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Kenneth Goodman
  • 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
  • Publication number: 20090151588
    Abstract: 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. Another perforating gun gravitational orientation system includes the swivel device having an axis of rotation which is spaced apart from a center of gravity of the perforating gun. Yet another perforating gun gravitational orientation system includes the swivel device having an axis of rotation which is spaced apart from a center axis of the perforating gun.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 18, 2009
    Applicant: Halliburton Energy Services, Inc.
    Inventors: John D. Burleson, Flint R. George, John H. Hales
  • Patent number: 7461580
    Abstract: 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 perforation may be accomplished using two groups of charges, which are contained in protective pressure chambers, however, may use only one group of bi-directional charges. Each pressure chamber may be positioned radially around the outside of the wellbore casing. The pressure chambers form longitudinally extending ribs, which conveniently serve to center the casing within the wellbore. One group of charges may be aimed inward in order to perforate the casing, while the other group of charges is aimed outward in order to perforate the formation.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: December 9, 2008
    Assignee: Shell Oil Company
    Inventors: Matthew Robert George Bell, Christopher Burres, Aron Ekelund
  • 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
  • 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: 7347278
    Abstract: A system includes a well tool for deployment in a well, a controller, and a link coupled between the controller and the well tool. The well tool comprises plural control units, each of the plural control units having a microprocessor and an initiator coupled to the microprocessor. Each microprocessor is adapted to communicate bi-directionally with the controller. The controller is adapted to send a plurality of activation commands to respective microprocessors to activate the respective control units. Each activation command containing a unique identifier corresponding to a respective control unit.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: March 25, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Nolan C. Lerche, James E. Brooks, Choon Fei Wong
  • Patent number: 7284489
    Abstract: 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 using two groups of charges which are contained in protective pressure chambers which are arranged radially around the outside of the wellbore casing. The pressure chambers form longitudinally extending ribs which conveniently serve to center the casing within the well bore. One group of charges is aimed inward in order to perforate the casing. A second group is aimed outward in order to perforate the formation. In an alternative embodiment, only one group of bi-directional charges is provided.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: October 23, 2007
    Assignee: Shell Oil Company
    Inventors: Matthew Robert George Bell, Eugene Murphy, Edward Paul Cernocky, Christopher Burres, Aron Ekelund, Allen Lindfors
  • Patent number: 7172023
    Abstract: 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) includes one or more substantially axially oriented collections of shaped charges (122, 124, 126) each of which is operably associated with the detonating cord (136). A perforation (152, 154) is formed in the formation (114) as a result of the interaction of jets (141, 142) formed upon the detonation of at least two shaped charges (122, 126) that create a weakened region (148) in the formation (114) followed by the detonation of at least one shaped charge (124) that forms a jet (150) that penetrated through the weakened region (148).
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: February 6, 2007
    Assignees: Delphian Technologies, Ltd., Well Ballistics, Ltd., Halliburton Energy Services Inc.
    Inventors: James M. Barker, Michael C. Rogers, Duncan MacNiven
  • Patent number: 6962202
    Abstract: 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 perforation is accomplished using two groups of charges, which are contained in protective pressure chambers. Each pressure chamber is positioned radially around the outside of the wellbore casing. The pressure chambers form longitudinally extending ribs, which conveniently serve to center the casing within the wellbore. One group of charges is aimed inward in order to perforate the casing. A second group is aimed outward in order to perforate the formation. In an alternative embodiment, only one group of bi-directional charges is provided.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: November 8, 2005
    Assignee: Shell Oil Company
    Inventors: Matthew Robert George Bell, Eugene Murphy, Edward Paul Cernocky, Christopher Burres, Aron Ekelund, Allen Lindfors
  • Patent number: 6877562
    Abstract: This invention relates to the field of oil wells and in particular to the explosive and other devices that are used to perforate oil well casings and hydrocarbon bearing rocks in order to create channels through which oil and gas can flow into the well bore. Existing oil well perforators are either termed “big hole” perforators which are designed to produce large holes in the oil well casing only or “deep hole” perforators which are designed to perforate the casing of the well into the surrounding rocks. This invention proposes a novel “dual action” perforator capable of substantially performing the same functions as both deep hole and big hole perforators.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: April 12, 2005
    Assignee: Qinetiq Limited
    Inventor: Brian Bourne
  • Patent number: 6758124
    Abstract: 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 casing. In one embodiment of the present invention, the phasing is arranged so that there is a zero phase tunnel formed. The zero phase tunnel is located at approximately the location where the gun rests against the low side of the well. Further, tunnels are formed by shape charges at plus and minus forty-five degrees and at plus and minus ninety degrees. This can also be referred to as a penta-phase. In another embodiment of the invention, charges can also be placed to allow for a plus and minus one hundred and thirty-five degrees pattern in addition to the penta-phase pattern described above. This expanded pattern can also be referred to as a hepta-phase pattern.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: July 6, 2004
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James Barker, Jerry Walker
  • Publication number: 20040118562
    Abstract: A multi-cycle pressure operated firing head for use in a subterranean well. In a described embodiment, a pressure actuated firing head for detonating a perforating gun in a subterranean well includes a firing mechanism and a member which displaces incrementally in response to alternating pressure increases and decreases applied to the firing head. The firing mechanism fires when the member displaces a predetermined distance. In another embodiment, a firing head includes a firing mechanism and a displacement mechanism which displaces a member of the firing head in response to a decrease in a pressure level proximate the firing head in the well. The firing mechanism fires when the member is displaced by the displacement mechanism.
    Type: Application
    Filed: December 20, 2002
    Publication date: June 24, 2004
    Inventor: Flint R. George
  • Patent number: 6675896
    Abstract: A detonation transfer subassembly for coupling two detonation activated tools in a work sting such that the work string may be severed between the two detonation activated tools without risk of a detonation. The detonation transfer subassembly comprises first and second explosive carrying members having a detonation transfer member disposed therebetween. The detonation transfer member defines a longitudinal passageway therein. A firing pin is disposed within the longitudinal passageway. The firing pin has a first position proximate the first explosive carrying member and a second position proximate the second explosive carrying member. The firing pin is propellable from the first position to the second position following a detonation within the first explosive carrying member such that the firing pin impacts an explosive disposed within the second explosive carrying member, thereby transferring detonation from the first explosive carrying member to the second explosive carrying member.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: January 13, 2004
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Flint R. George
  • Patent number: 6604584
    Abstract: A tool activating system includes a multiple control units coupled to activate devices in a tool string positioned in a well. A processor is capable of communicating with the control units to send commands to the control units as well as to retrieve information (such as unique identifiers and status) of the control units. Selective activation of the control units may be performed based on the retrieved information. Further, defective control units or devices may be bypassed or skipped over.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: August 12, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Nolan C. Lerche, David Merlau
  • Patent number: 6523449
    Abstract: 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 the perforating gun.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: February 25, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Alfredo Fayard, Haoming Li, Robert A. Parrott
  • Publication number: 20020062991
    Abstract: A system includes a user interface device that is capable of communicating wirelessly with a tool. In one example arrangement, the tool can be a well tool or a tool having one or more explosive components. The user interface device is adapted to send commands to the tool to perform tasks, such as test operations. In one arrangement, the user interface device is a personal digital assistant (PDA) having a graphical user interface (GUI).
    Type: Application
    Filed: November 28, 2001
    Publication date: May 30, 2002
    Inventors: Simon L. Farrant, Nolan C. Lerche, James E. Brooks, Edward H. Rogers, Michael L. Timmons, Anthony F. Venersuo
  • Patent number: 6283227
    Abstract: A tool activating system includes multiple control units coupled to activate devices in a tool string positioned in a well. A processor is capable of communicating with the control units to send commands to the control units as well as to retrieve information (such as unique identifiers and status) of the control units. Selective activation of the control units may be performed based on the retrieved information. Further, defective control units or devices may be bypassed or skipped over.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: September 4, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Nolan C. Lerche, David Merlau