Firing Chamber Movable In Bore Relative To Carrier Or Another Firing Chamber Patents (Class 175/4.53)
  • Patent number: 9671201
    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: February 6, 2014
    Date of Patent: June 6, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Manuel P. Marya, Wenbo Yang, Lawrence A. Behrmann, Steven W. Henderson, Robert Ference
  • Patent number: 9520219
    Abstract: A perforating gun includes a charge tube having shaped charges affixed thereto. Each shaped charge includes a radially outward pointing post adapted to receive a detonator cord. A retention member installed on the post provides a compressive force that energetically couples the detonator cord to the post. The radially outermost portion of the retention member is radially flush with or radially recessed relative to the radially outermost portion of each post. In one embodiment, the retention member has a rounded medial portion, a central opening and a pair of locking tabs that point radially inward to the central opening. Each post may include a slot for receiving the detonator cord and a circumferential groove that is adapted to receive the locking tabs.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: December 13, 2016
    Assignee: OWEN OIL TOOLS LP
    Inventors: Timothy Edward LaGrange, Lyle W. Andrich, Cory D. Day, Dan W. Pratt
  • Patent number: 9103636
    Abstract: An explosive device includes a housing and an explosive charge within the housing. The explosive charge includes a primary explosive charge and a shaped charge placed against an inside surface of the housing. The explosive device may further include a buffering material that separates the shaped charge and the primary explosive charge. The shaped charge provides a means for opening the housing before detonating the primary explosive charge, thereby enhancing the blast effect from detonating the primary explosive charge.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: August 11, 2015
    Assignee: Raytheon Company
    Inventors: Richard Ames, Craig L Wittman
  • Patent number: 8950509
    Abstract: A firing assembly is configured to be contained in a recess formed in a wall of a tubular string subassembly and operates without blockage of the central core of the casing subassembly. The assembly can include: one or more casings connected together to form a firing head containment body, the firing head containment body comprising a detonation chamber and actuation chamber; a detonator configured in the detonation chamber; a moveable actuator configured in the actuation chamber and operatively connected to the detonator, wherein the actuator is retained in a first position in the actuation chamber by a retention detent; a coupler operatively connected to the actuator opposite the detonator, wherein the coupler comprises a channel for communicating pressure through the coupler to the actuator that overcomes the retention detent and allows the actuator to move in the actuation chamber to as second position, wherein the detonator activates in dependence upon the actuator moving to the second position.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: February 10, 2015
    Assignee: Nine Energy Canada Inc.
    Inventors: Nathan Brian Coffey, Terry Lee Mytopher
  • Patent number: 8931389
    Abstract: A downhole explosive detonation comprises a high voltage electro-explosive initiator comprising an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. Explosive is initiated in a direction approximately parallel, or in another version perpendicular to the capacitor discharge unit. A unique configuration and construction of the assembly allows installation through a small service port in the gun housing structure for more efficient gun arming. A real time downhole voltage monitoring is described that transmits voltage readings to the surface during a firing sequence.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: January 13, 2015
    Inventors: James E. Brooks, Nolan C. Lerche
  • Patent number: 8844625
    Abstract: Perforating gun connectors are provided with a small diameter inner tube to house the detonating cord and an outer load-bearing tube that is ported to be in pressure balance. The inner tube controls the volume in the gun for the well fluids to enter after the guns are fired and the initial pressure surge dissipates. The smaller diameter also increases pressure rating and diminishes the chance of plastic deformation. Since the inner tube is inset even some deformation is tolerated without distorting the outer tube due to the space between the tubes. A bored rod is used as a housing member or a layered single outer wall.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: September 30, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Nauman H. Mhaskar, William D. Myers
  • Patent number: 8684083
    Abstract: A perforating gun designed to orient a charge holding structure (e.g., tube, solid rod) within a barrel of the perforating gun to be at the same position relative to a wellbore casing regardless of a position of the barrel of the perforating gun. A charge assembly receivable within the barrel includes the charge holding structure and first and second end caps that are rotatably interconnected to the charge holding structure and non-rotatably interconnected to the barrel. As the charge holding structure is always or substantially always designed to maintain a common orientation in relation to the wellbore casing, explosive charges associated with the charge holding structure so as to fire towards particular location on the wellbore casing may always or substantially always perforate such particular locations upon or after the explosive charges have fired.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: April 1, 2014
    Assignee: CCS Leasing and Rental, LLC
    Inventors: Manuel Torres, Darwin Holte
  • Patent number: 8443886
    Abstract: A perforating gun designed to orient a charge holding structure (e.g., tube, solid rod) within a barrel of the perforating gun to be at the same position relative to a wellbore casing regardless of a position of the barrel of the perforating gun. A charge assembly receivable within the barrel includes the charge holding structure and first and second end caps that are rotatably interconnected to the charge holding structure and non-rotatably interconnected to the barrel. As the charge holding structure is always or substantially always designed to maintain a common orientation in relation to the wellbore casing, explosive charges associated with the charge holding structure so as to fire towards particular location on the wellbore casing may always or substantially always perforate such particular locations upon or after the explosive charges have fired.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: May 21, 2013
    Assignee: CCS Leasing and Rental, LLC
    Inventors: Manuel Torres, Darwin Holte
  • 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: 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
  • 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: 6978848
    Abstract: A method and apparatus for driving at least one explosive driven projectile into an open hole or well bore of a subterranean formation for the purpose of stimulating productive formation. The apparatus is capable of pivoting within the open hole or well bore for desired firing at an angle and is also capable of deep penetration into a subterranean formation. The apparatus may also be conveyed by a tubing in horizontal drilling applications.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: December 27, 2005
    Inventor: Alan L. Nackerud
  • Patent number: 6805056
    Abstract: A method and apparatus for removing a tubular member (e.g., leg of an abandoned or obsolete fixed platforms in a marine environment) is provided. The apparatus includes a delivery system having a frame carrying explosive shaped charges. The frame includes charges having curved sections which can be moved relative to one another for engaging the inside bore of a tubular member to be severed. The charges are biased (e.g., spring loaded) to be moved automatically to an extended position that engages the tubular member (e.g., platform leg) when a trigger is activated from a remote location. The trigger can be a pin carried in a tube with wires connecting each curved charge section to the pin. When the pin is lifted from its tube, the wires are released enabling the springs to thrust the charges against the inside of a pipe, leg or tubular member to be cut. Once in this position, the charges can be fired.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: October 19, 2004
    Inventor: William T. Poe
  • Publication number: 20030098158
    Abstract: An internally oriented perforating apparatus and associated method of perforating provide increased reliability in orienting perforating charges to shoot in desired directions in a well. In a described example, a perforating gun includes a tubular gun carrier, multiple perforating charges, multiple charge mounting structures and multiple rotating supports. The rotating supports are attached between the charge mounting structures, or at least between the perforating charges.
    Type: Application
    Filed: November 28, 2001
    Publication date: May 29, 2003
    Inventors: Flint R. George, Melissa G. Allin
  • Patent number: 6378625
    Abstract: A perforating gun includes a guide, a first charge unit, a second charge unit and a linkage. The first and second charge units are coupled to the guide. The second charge unit is capable of being in a collapsed position for passing the second charge unit through a tubing and is capable of being in an expanded position for detonating the second charge unit. The linkage is connected to the second charge unit to communicate an applied force to cause the second charge unit to move the second charge unit along the guide toward the first charge unit when the second charge unit is at least partially in the expanded position.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: April 30, 2002
    Assignee: Schlumberger Technology Corporation
    Inventor: Kuo-Chiang Chen
  • Patent number: 6371219
    Abstract: A shaped charge is provided which includes features enhancing its manufacturability. In a described embodiment, an oilwell perforator is provided which includes a case and a liner, at least one of which is a molding. The molding has a metal loaded polymer matrix.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: April 16, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: William R. Collins, David J. Leidel, Jerry L. Walker, Nathan Clark, James M. Barker