With Bore Condition Firing Control, Or Compensating Means Patents (Class 175/4.54)
  • Patent number: 9513400
    Abstract: An apparatus includes a radiation source to output radiation after power is supplied. The apparatus also includes a power source to supply power. The apparatus includes an ambient-activated switch electrically coupled between the radiation source and the power source. The ambient-activated switch is to switch to an open position while a value for an ambient characteristic for the ambient-activated switch is at an ambient level for a surface of the Earth. The ambient-activated switch is to switch to a closed position while the value for the ambient characteristic for the ambient-activated switch is at a downhole ambient level, wherein the ambient-activated switch is to electrically couple the power source to the radiation source while in the closed position.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: December 6, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Daniel F. Dorffer, Donald L. Crawford
  • Patent number: 9334715
    Abstract: A first end of a conductive spring is embedded in a wall of a large chamber of a piston housing. The spring is held in tension by a second end of the spring being pinned against a bead contact by a trigger pin. The diameter of the piston and a tensile breaking strength of the trigger pin are selected so that the trigger pin is breakable and the tension in the spring is releasable upon the presence of a predetermined pressure difference between a pressure on the contact side of the piston and a pressure on the pinning side of the piston. Release of tension in the spring closes an electrical circuit.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: May 10, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Clovis Satyro Bonavides, Donald Leon Crawford, Paul Anthony Molina, Gabriel Vicencio Mata
  • Patent number: 9121266
    Abstract: One or more burst disks, for isolating downhole communication between a tubular and a hydrocarbon-bearing formation, are fit with a shaped explosive charge. Detonation of the shaped charge is initiated by the rupture of the burst disk. In a system for stimulating the formation, one or more sets of two or more shaped charge, enhanced burst disks are located at a location along the tubular corresponding to a selected interval for stimulation. The enhanced burst disks can be fit with a chamber of known pressure for establishing a known and significant pressure differential across the burst disk for enabling substantially simultaneous rupture at the selected interval.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: September 1, 2015
    Assignee: TRICAN WELL SERVICE LTD.
    Inventor: Scott Sherman
  • Patent number: 8910556
    Abstract: Detonation of a perforating gun is initiated by engagement of the lower distal end of the gun assembly against a bottom hole bore plug. A fluid pressure actuated firing head is initiated by well fluid that is pressurized by a free piston having an integral rod projecting from the distal end of the gun assembly. The piston is displaced against a closed fluid volume when the projecting rod engages the bore plug.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: December 16, 2014
    Inventors: Don Umphries, Gabe Williger
  • Patent number: 8789467
    Abstract: An explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: July 29, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Donald L. Crawford
  • Patent number: 8726996
    Abstract: A downhole tool assembly for use in a wellbore includes a tubular body carrying an explosive which is selectively detonated to create a dynamic underbalance or overbalance effect in the wellbore. The tubular body has opposite ends provided with plug assemblies including plug elements movable between a normally collapsed state and an actuable expanded state. The plug elements are adapted to be actuated to the expanded state between the tubular body and an outer extent of the wellbore before the creation of the dynamic underbalance or overbalance effect to isolate a discrete segment of the wellbore to which the dynamic underbalance or overbalance effect is confined.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: May 20, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Adil Mahallab Al Busaidy, Karim Al Sayed, Fokko H. C. Doornbosch, Carlos E. Baumann, Lawrence A. Behrmann, Harvey Williams, Andrew J. Martin
  • Patent number: 8622149
    Abstract: A ballistic transfer delay device and method of use. The ballistic transfer delay device does not include a firing pin and it is not pressure initiated. The device comprises a time delay fuse, a through-bulkhead initiator to initiate the time delay fuse, and an output booster to ballistically transfer the energy from the initiated time delay fuse.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: January 7, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Bennie C. Gill, Steven W. Henderson
  • Patent number: 8584763
    Abstract: A wellbore apparatus includes a connector sub assembly having a body, the body having a first end adapted to couple to a first perforating sub component and a second, axially opposed end adapted to couple to a second perforating sub component. The connector sub body defines a cavity proximate the second end of the connector sub body; and a flow path in fluid communication with the cavity and a location exterior to the wellbore apparatus. The apparatus includes a valve residing in the flow path and actuatable to block or allow fluid flow from the cavity, through the flow path, to the location exterior to the wellbore apparatus.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: November 19, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John H Hales, John D Burleson
  • Publication number: 20130277109
    Abstract: An explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.
    Type: Application
    Filed: March 20, 2013
    Publication date: October 24, 2013
    Inventor: Halliburton Energy Services, Inc
  • Publication number: 20130199843
    Abstract: An interruption sub for a downhole tool the downhole tool activatable by detonation. The interruption sub includes a barrier movable between a biased closed position and an open position. Preventing ballistic transfer to the downhole tool in the closed position and allowing ballistic transfer to the downhole tool in the open position. A detonation path within the interruption sub, wherein the barrier is hydraulically or electronically movable from the closed position to the open position in response to at least one condition acceptable for ballistic transfer. Also included is a downhole tool activatable by detonation.
    Type: Application
    Filed: February 7, 2012
    Publication date: August 8, 2013
    Applicant: Baker Hughes Incorporated
    Inventor: Colby Ross
  • Patent number: 8424455
    Abstract: An explosive tool is disclosed. The explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: April 23, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Donald L. Crawford, II
  • Patent number: 8381822
    Abstract: A wellbore apparatus includes a connector sub assembly having a body, the body having a first end adapted to couple to a first perforating sub component and a second, axially opposed end adapted to couple to a second perforating sub component. The connector sub body defines a cavity proximate the second end of the connector sub body; and a flow path in fluid communication with the cavity and a location exterior to the wellbore apparatus. The apparatus includes a valve residing in the flow path and actuatable to block or allow fluid flow from the cavity, through the flow path, to the location exterior to the wellbore apparatus.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: February 26, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John H. Hales, John D. Burleson
  • Patent number: 8347963
    Abstract: A method of perforating a well includes selecting a desired transient underbalanced condition, configuring a perforating gun string to achieve the transient underbalanced condition, deploying the perforating gun is a wellbore, and firing the perforating to achieve the transient underbalanced condition.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: January 8, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Ashley B. Johnson, Lawrence A. Behrmann, Wenbo Yang, Fokko Harm Cornelis Doornbosch, Ian C. Walton
  • Publication number: 20130000979
    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: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Cam Van Le, Darren Ross Barlow, Jeffrey Alan Nelson
  • Publication number: 20120103223
    Abstract: An explosive tool is disclosed. The explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.
    Type: Application
    Filed: September 19, 2011
    Publication date: May 3, 2012
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Donald L. Crawford
  • 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: 8136608
    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: Grant
    Filed: December 16, 2008
    Date of Patent: March 20, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Kenneth Goodman
  • Patent number: 8113119
    Abstract: An explosive tool is disclosed. The explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: February 14, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Donald L. Crawford
  • Patent number: 8006762
    Abstract: A downhole oilfield completion method comprises determining a surge profile for a wellbore and assembling a downhole completion tool having an interior surge volume and comprising a surge attenuation system operable to reduce a surge of the downhole completion tool based at least in part on the surge profile. The method also comprises running the downhole completion tool into the wellbore and surging the wellbore by admitting wellbore fluid into the interior surge volume, the surge reduced at least in part by the surge attenuation system.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: August 30, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John D. Burleson, John H. Hales, Clinton C. Quattlebaum
  • Patent number: 8002026
    Abstract: Electronic time delay apparatuses and methods of use are disclosed. An explosive or propellant system, which may be configured as a well perforating system includes an electronic time delay assembly comprising an input subassembly, an electronic time delay circuit, and an output subassembly. The input subassembly is activated by an external stimulus, wherein an element is displaced to activate an electronic time delay circuit. The electronic time delay circuit comprises a time delay device coupled with a voltage firing circuit. The electronic time delay circuit counts a time delay, and, upon completion, raises a voltage until a threshold firing voltage is exceeded. Upon exceeding the threshold firing voltage, a voltage trigger switch will break down to transfer energy to an electric initiator to initiate an explosive booster within the output subassembly.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: August 23, 2011
    Assignee: Alliant Techsystems Inc.
    Inventors: John A. Arrell, Jr., Ronald S. Borja, William J. Slade, Francois X. Prinz
  • Patent number: 7984761
    Abstract: An underbalanced perforating system is disclosed for use in openhole completions to maximize the wellbore and matrix cleanup efficiency, to connect natural fracture patterns, and/or to enable application of new drilling fluid technology in difficult subsurface environments. The perforating system can be used for any hydrocarbon bearing formations with any lithology.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: July 26, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Frank F. Chang, Lawrence A. Behrmann, Ian C. Walton, Keng Seng Chan
  • Patent number: 7861784
    Abstract: A downhole oilfield completion method comprises determining a surge profile for a wellbore and assembling a downhole completion tool having an interior surge volume and comprising a surge attenuation system operable to reduce a surge of the downhole completion tool based at least in part on the surge profile. The method also comprises running the downhole completion tool into the wellbore and surging the wellbore by admitting wellbore fluid into the interior surge volume, the surge reduced at least in part by the surge attenuation system.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: January 4, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John D. Burleson, John H. Hales, Clinton C. Quattlebaum
  • Patent number: 7845410
    Abstract: An underbalanced perforating system is disclosed for use in openhole completions to maximize the wellbore and matrix cleanup efficiency, to connect natural fracture patterns, and/or to enable application of new drilling fluid technology in difficult subsurface environments. The perforating system can be used for any hydrocarbon bearing formations with any lithology.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: December 7, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Frank F. Chang, Lawrence A. Behrmann, Ian C. Walton, Keng Seng Chan
  • Patent number: 7806035
    Abstract: 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 high temperature situation, the relief system has a fuseable link that melts thereby allowing movement of a piston to open vent communication between the inside of a gun body in the ambient conditions. Similarly, a pressure device includes a piston responsive to pressure that moves under high pressure within the gun body thereby exposing a port enabling communication between the inside of the gun body and the ambient conditions.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: October 5, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Garry R. Kaiser, Colby W. Ross, Tracy L. Graham, Mark L. Sloan
  • Patent number: 7789153
    Abstract: Electronic time delay apparatuses and methods of use are disclosed. An explosive or propellant system, which may be configured as a well perforating system includes an electronic time delay assembly comprising an input subassembly, an electronic time delay circuit, and an output subassembly. The input subassembly is activated by an external stimulus, wherein an element is displaced to activate an electronic time delay circuit. The electronic time delay circuit comprises a time delay device coupled with a voltage firing circuit. The electronic time delay circuit counts a time delay, and, upon completion, raises a voltage until a threshold firing voltage is exceeded. Upon exceeding the threshold firing voltage, a voltage trigger switch will break down to transfer energy to an electric initiator to initiate an explosive booster within the output subassembly.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: September 7, 2010
    Assignee: Alliant Techsystems, Inc.
    Inventors: Francois X. Prinz, John A. Arrell, Jr., Ronald S. Borja, William J. Slade
  • Patent number: 7721820
    Abstract: A buffering device for use in conjunction with a downhole tool string, wherein the tool string includes a ballistics device. The buffering device includes a mandrel attached within a tool string and proximate to the ballistics device. An anchor is disposed on the mandrel and a disk plate is coaxially placed on the mandrel that is slideable thereon. The disk plate is proximate to the ballistic device. A resilient member, such as a spring, is coaxially placed on the mandrel between the disk plate and the anchor. The pressure wave produced by activation of the ballistic device pushes the disk plate toward the anchor and compresses the spring there between. Since the disk plate extends outward into sealing contact with casing lining the wellbore, compression of the spring dissipates energy waves produced by activation of the ballistic device.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: May 25, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Freeman L. Hill, Randy L. Evans
  • Patent number: 7712406
    Abstract: 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 influence of a number of alterations or pulsations between high and low pressure in the surrounding fluid environment, with the detonation triggering unit inside the body being activated at the subsequent contact with the fluid environment as a consequence of the pellet being deformed. In rupturing, external fluid at overpressure is released into the cylinder and drives a firing pin against a detonating cartridge. A device for an ignition pellet is also described.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: May 11, 2010
    Assignee: Total Catcher Offshore AS
    Inventor: Nils Reimers
  • Patent number: 7591212
    Abstract: 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 corresponding tapered hollowed section of one end of the other section. The present invention also provides for the inclusion of shaped charges and booster charges within. Adjacent the charges are sealing bulkheads.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: September 22, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: William D. Myers, Jr., Edgar W. Van Sickle, Kristian Vargervik
  • Patent number: 7565927
    Abstract: An explosive device includes a housing, and at least one of an initiator and an explosive in the housing. The at least one of the initiator and explosive are activatable in response to stimulus from a control line. A monitor in the housing monitors a state of the stimulus to enable determination of a status of the explosive device.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: July 28, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: David Gerez, Cesar Da Gama
  • Patent number: 7487833
    Abstract: Safety apparatus is disclosed for providing ballistic train interruption in a perforating system. The safety apparatus comprises a generally tubular shaped housing having first and second ends which are fabricated to permit the housing to be positioned at any location in the perforating system. The apparatus comprises first and second ballistic sections in the housing and a third ballistic section which is rotatably mounted in the housing to move between a disarmed position and an armed position based on downhole pressure. Upon retrieval of the perforating system from the wellbore, the safety apparatus functions to return a third ballistic section to its disarmed position. Additionally, apparatus is provided to permanently disable the third ballistic section to insure that no inadvertent detonation of the guns occurs when retrieving the system from a wellbore.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: February 10, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: Larry Grigar, Joe C. Hromas
  • Patent number: 7387156
    Abstract: A perforating safety system. A perforating safety system includes a detonation transfer interrupter with a device which decreases an axial separation between detonation transfer components after installation of the interrupter in the well. Another perforating safety system includes a perforating gun and firing head installed together in the well, and an interrupter having a device which increases a separation between detonation transfer components in the well to thereby prevent transfer of detonation from the firing head to the perforating gun. Yet another perforating safety system includes a firing head positioned at a distal end of a perforating assembly when installed in the well, and an interrupter having a device which decreases a separation between detonation transfer components after installation of the interrupter in the well.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: June 17, 2008
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Gavin H. Drummond, Flint George, Ryan A. Harrison, John Hales, Justin Mason
  • Patent number: 7287589
    Abstract: A well treatment system of the present invention includes a housing forming a sealed surge chamber, and a surge charge disposed within the sealed surge chamber, wherein the surge charge is adapted upon activation to penetrate the housing and to not penetrate material exterior of the housing. Fluid communication is created between the surge chamber and the wellbore when the housing is penetrated by the surge charge. The penetration permits wellbore fluid to flow quickly into the surge chamber. Fluid flow into the surge chamber may enhance a surge of flow from the formation into the wellbore.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: October 30, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Brenden M. Grove, Mark C. Duhon, Lawrence A. Behrmann, Claude D. Jones
  • Patent number: 7284612
    Abstract: A method and apparatus for use in a wellbore includes running a tool string to an interval of the wellbore, and activating a first component in the tool string to create a transient underbalance pressure condition in the wellbore interval. Additionally, a second component in the tool string is activated to create a transient overbalance pressure condition in the wellbore interval, or vice versa.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: October 23, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Wanchai Ratanasirigulchai, Lawrence A. Behrmann, Andrew J. Martin, Kenneth R. Goodman
  • Patent number: 7246659
    Abstract: A system and method of damping fluid pressure waves in a subterranean well. In a described embodiment, pressure waves are damped by positioning a dampener in the well during a perforating operation. The dampener may attenuate the pressure waves by absorbing the pressure waves, flowing the pressure waves through viscously damping material, generating complementary pressure waves, changing a material phase, or by a combination of these methods.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: July 24, 2007
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael L. Fripp, Adam Wright
  • Patent number: 6966377
    Abstract: An apparatus and method includes positioning a string in a wellbore, the string having a surge chamber. A closure member is provided below the well surface, with the surge chamber defined at least in part by the closure member. At least one port to the chamber is opened to create a fluid surge into the surge chamber and a local low pressure condition in a wellbore region.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: November 22, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Ashley B. Johnson, Lawrence A. Behrmann, Wenbo Yang, Fokko Harm Cornelis Doornbosch, Ian C. Walton
  • Patent number: 6896059
    Abstract: An apparatus and method is provided to reduce interference resulting from activation of explosive devices. To reduce interference, one or more shock impeding elements are placed proximal one or more explosives to impede propagation of shock caused by detonation of the explosives. The shock impeding elements include a porous material, such as a porous liquid or solid.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: May 24, 2005
    Assignee: Schlumberger Technology Corp.
    Inventors: James E. Brooks, Wenbo Yang, Brenden M. Grove, Ian C. Walton, Lawrence A. Behrmann
  • Patent number: 6874579
    Abstract: An apparatus and method of perforating and surging a section of the wellbore includes running a perforating gun into the well on a string having an isolation valve above the perforating gun, closing the valve, and perforating the well with the isolation valve closed so that the formation is isolated from the well surface. An underbalance pressure is provided above the isolation valve, and then, the isolation valve is opened to surge the formation.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: April 5, 2005
    Assignee: Schlumberger Technology Corp.
    Inventors: Ashley B. Johnson, Lawrence A. Behrmann, Wenbo Yang, Fokko Harm Cornelis Doornbosch
  • Patent number: 6742602
    Abstract: 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 the first end to the second end. A detonator is located and restrained in the passage so as to be adjacent to the detonating material. At least one venting passage extends from the central passage to an exterior of the detonating block.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: June 1, 2004
    Assignee: Computalog Limited
    Inventor: Kevin Trotechaud
  • Patent number: 6561274
    Abstract: A system for unloading fluids from a generally upright tubular member of a wellbore wherein a combustible fuel cell can be placed in the tubular member below the fluid and ignited to generate gasses. The gasses generated by the burning of the fuel cell can be used to force at least a portion of the fluid upward out of the tubular member.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: May 13, 2003
    Assignee: Conoco Phillips Company
    Inventors: Anthony V. Hayes, Kenneth R. Sundberg
  • Patent number: 6554081
    Abstract: An apparatus and method is provided to reduce interference resulting from activation of explosive devices. One type of interference is charge-to-charge interference, and another type of interference is pre-shock interference between a detonating cord and an explosive, such as a shaped charge. To reduce interference, one or more shock impeding elements are placed proximal one or more explosives to impede propagation of shock caused by detonation of the explosives. The shock impeding elements include a porous material, such as a porous liquid or solid. In another arrangement, a shock barrier may be positioned between a detonating cord and an explosive to reduce pre-shock interference. In yet another feature, an encapsulant may be provided around one or more shaped charges to enhance structural support for the shaped charges.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: April 29, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: James E. Brooks, Wenbo Yang, Brenden M. Grove, Ian C. Walton, Manish Kothari, Lawrence A. Behrmann, Alfredo Fayard, Daniel C. Markel, Wallace E. Voreck
  • Publication number: 20030056953
    Abstract: The present invention provides a method and apparatus for plugging a wellbore in a trip saving manner. In one aspect, the invention includes a cement retainer disposed on a run-in string and a radially expanded perforating assembly disposed below the cement retainer. In a single run, the apparatus provides for perforating a wellbore and squeezing cement through the perforations and into the formation therearound. In another aspect, a method of plugging the wellbore includes running a cement retainer and a radially expanded perforating assembly into a wellbore on a run-in string. After the cement retainer is set, a firing head is actuated to cause the perforating gun to discharge. After perforations are formed, cement is introduced from the cement retainer into the isolated area and squeezed through the perforations. Thereafter, the run-in string disengages from the cement retainer leaving behind the plug formed.
    Type: Application
    Filed: November 7, 2002
    Publication date: March 27, 2003
    Applicant: Weatherford/Lamb, Inc.
    Inventors: David Moore Tumlin, Gene K. Fugatt, David Hosie, Mike Luke
  • Publication number: 20020125045
    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 is disclosed. 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: Application
    Filed: March 8, 2001
    Publication date: September 12, 2002
    Inventor: Flint R. George
  • Patent number: 6435278
    Abstract: A latching system permits a firing head to be lowered into a wellbore and reliably coupled to a perforating gun previously lowered into the wellbore. In a disclosed embodiment thereof, the latching system includes a tubular collar associated with the firing head, and a stinger associated with the perforating gun. As the firing head approaches the previously lowered perforating gun, shearable studs projecting into the interior of the collar are received in external side surface J-slots formed on the stinger. The latching of the collar studs in the stinger J-slots permits the firing head/perforating gun connection to be verified simply by pulling up on and creating increased tension in the structure, such as a slick line, used to lower the firing head to the perforating gun. After the firing head is used to detonate the perforating gun, the spent firing head may be retrieved by pulling it uphole with sufficient force to shear its collar studs.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: August 20, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Darren Ross Barlow, Roger Charles Watson
  • Patent number: 6412573
    Abstract: A system for use in a subterranean well includes a tubing, a perforating gun, a detonator and circuitry. The detonator is adapted to fire the perforating gun. The circuitry is adapted to determine whether the perforating gun has fired and based on the determination, operate a valve of the tubing to transit a stimulus to the surface of the well to indicate whether the perforating gun has fired.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: July 2, 2002
    Assignee: Schlumberger Technology Corporation
    Inventor: Vladimir Vaynshteyn
  • Patent number: 6298924
    Abstract: An apparatus for use in a subterranean well includes a downhole energy source, a first switch, a second switch, a detonator, a first controller and a second controller. The first switch has a first predetermined state to transfer energy from the energy source, and the second switch has a second predetermined state to transfer the energy from the energy source. A detonator receives the energy from the energy source when the first switch and second switches are concurrently in the first and second predetermined states. A first controller independently detects a predetermined stimulus that is transmitted from the surface of the well and causes the first switch to enter to first predetermined state based on the detection by the first controller. A second controller independently detects the predetermined stimulus transmitted from the surface of the well and causes the second switch to enter the second predetermined state based on the detection by the second controller.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: October 9, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Vladimir Vaynshteyn, Christian C. Spring
  • Patent number: 6213203
    Abstract: A downhole device and method for performing a function in a well. The device has a series of dedicated hydro-mechanical locks that prevent occurrence of an associated function. The hydro-mechanical locks are capable of being released directly by a respective elevated hydraulic activating pressure condition, and are constructed and arranged for sequential operation, such that a successive lock in the series cannot be released until after the hydraulic pressure condition required to release the preceding lock in the series has occurred. In a preferred embodiment, an actuator sequentially releases each lock in a series of locks, subsequently moving an operator to perform a function. A preferred implementation employs a series of resilient rings movable, sequentially, from a locking to an unlocking position, and a common actuator that effects these movements.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: April 10, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: A. Glen Edwards, Klaus B. Huber
  • Patent number: 6182750
    Abstract: A downhole device and method for performing a function in a well. The device has a series of dedicated hydro-mechanical locks that prevent occurrence of an associated function. The hydro-mechanical locks are capable of being released directly by a respective elevated hydraulic activating pressure condition, and are constructed and arranged for sequential operation, such that a successive lock in the series cannot be released until after the hydraulic pressure condition required to release the preceding lock in the series has occurred. In a preferred embodiment, an actuator sequentially releases each lock in a series of locks, subsequently moving an operator to perform a function. A preferred implementation employs a series of resilient rings movable, sequentially, from a locking to an unlocking position, and a common actuator that effects these movements.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: February 6, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: A. Glen Edwards, Klaus B. Huber
  • Patent number: 6179064
    Abstract: A system for use in a subterranean well includes a tubing, a perforating gun, a detonator and circuitry. The detonator is adapted to fire the perforating gun. The circuitry is adapted to determine whether the perforating gun has fired and based on the determination, operate a valve of the tubing to transmit a stimulus to the surface of the well to indicate whether the perforating gun has fired.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: January 30, 2001
    Assignee: Schlumberger Technology Corporation
    Inventor: Vladimir Vaynshteyn