Patents by Inventor Randy C. Tolman

Randy C. Tolman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190316449
    Abstract: A well completion system can include fluid flow through a flow passage, and one or more diverters deployed into the flow passage downhole of a perforating assembly, the diverters and the perforating assembly being concurrently displaced by the fluid flow. A perforating assembly can include a perforator, and a control module including a memory, a motion sensor, a timer, and a controller that causes the perforator to fire in response to a lack of motion for a predetermined period of time. A well completion method can include flowing fluid through a flow passage, deploying a perforating assembly into the flow passage, and displacing the perforating assembly through the flow passage by the fluid flow at a predetermined flow rate for a predetermined flow time, and ceasing the fluid flow at an end of the predetermined flow time, thereby placing the perforating assembly at a desired location for forming perforations.
    Type: Application
    Filed: April 4, 2019
    Publication date: October 17, 2019
    Inventors: Roger L. SCHULTZ, Randy C TOLMAN, Andrew M. FERGUSON
  • Patent number: 10364659
    Abstract: Wellbore tubulars including selective stimulation ports (SSPs) sealed with sealing devices and methods of operating the same are disclosed herein. The wellbore tubulars include a tubular body that defines a tubular conduit and a plurality of selective stimulation ports. Each selective stimulation port includes an SSP conduit and a sealing device seat. The wellbore tubulars further include a plurality of sealing devices. Each sealing device includes a primary sealing portion that is seated on a corresponding sealing device seat and forms a primary seal with the corresponding sealing device seat. Each sealing device also includes a secondary sealing portion that extends from the primary sealing portion and forms a secondary seal between the primary sealing portion and the corresponding sealing device seat. The methods include methods of stimulating a subterranean formation utilizing the wellbore tubulars.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: July 30, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C Tolman, P. Matthew Spiecker, Steve Lonnes
  • Patent number: 10358896
    Abstract: Apparatus and methods for reducing the force required to pull a device from a tubular, the apparatus including a tubular sealing device for mating with a downhole tubular component, the tubular sealing device having an axial length and a longitudinal bore therethrough; and an elongated rod slidably positionable within the longitudinal bore of the tubular sealing device, the elongated rod having a first end, a second end, and an outer surface, the outer surface structured and arranged to provide i) a hydraulic seal when the elongated rod is in a first position within the longitudinal bore of the tubular sealing device, and ii) at least one external flow port for pressure equalization upstream and downstream of the tubular sealing device when the elongated rod is placed in a second position within the longitudinal bore of the tubular sealing device.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: July 23, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Michael C. Romer, Randy C. Tolman
  • Patent number: 10352144
    Abstract: A tool assembly for performing a wellbore operation including an actuatable tool, a location device, and on-board controller are together dimensioned and arranged to be deployed in the wellbore as an autonomous unit. The actuatable tool, such as a perforating gun having associated charges, perforates a wellbore along a selected zone of interest. The location device, such as casing collar locator, senses the location of the actuatable tool based on a physical signature provided along the wellbore. The on-board controller or micro-processor is configured to send an activation signal to the actuatable tool when the location device has recognized a selected location of the tool based on the physical signature. The tool assembly further includes a multi-gate safety system. The safety system prevents premature activation of the actuatable tool.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: July 16, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Pavlin B. Entchev, Renzo M. Angeles Boza, George R. King, Robert C. Stanton, Elton Winemiller, Randy C Tolman, Peter W. Sauermilch, Jason Z. Gahr
  • Patent number: 10352130
    Abstract: A flushable well screen or filter assembly for placement within a tubular. The assembly includes a well screen or filter having an inlet end and an outlet end; and a velocity fuse positioned downstream of the outlet end of the well screen or filter, the velocity fuse in fluid communication with the well screen or filter. A system for removing fluids from a well and a method for back-flushing an upstream well screen or filter installed within a tubular are also provided.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: July 16, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C. Tolman, Michael C. Romer
  • Patent number: 10309195
    Abstract: Selective stimulation ports including sealing device retainers and methods of utilizing the same are disclosed herein. The selective stimulation ports (SSPs) are configured to be operatively attached to a wellbore tubular that defines a tubular conduit. The SSPs include an SSP conduit, which extends at least substantially perpendicular to a wall of the wellbore tubular, and a sealing device receptacle, which defines at least a portion of the SSP conduit and is sized to receive a sealing device. The SSPs also include a sealing device seat, which is shaped to form a fluid seal with the sealing device. The SSPs further include a sealing device retainer, which is configured to retain the sealing device within the sealing device receptacle. The methods include methods of stimulating the hydrocarbon well utilizing the SSPs and/or methods of conveying a downhole tool within the hydrocarbon well utilizing the SSPs.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: June 4, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C. Tolman, P. Matthew Spiecker, Steve Lonnes, Timothy J. Hall
  • Publication number: 20190153828
    Abstract: Perforation devices including trajectory-altering structures and methods of utilizing the same. The perforation devices include a magazine, a barrel, a trajectory-altering structure, and an action. The magazine is configured to contain a plurality of cartridges. The barrel extends between a breech, which is configured to receive a selected cartridge of the plurality of cartridges that includes a selected projectile, and a muzzle, which is configured, upon firing of the selected cartridge, to permit the selected projectile to exit the barrel at a muzzle velocity and with a muzzle trajectory. The trajectory-altering structure is configured to act upon the selected projectile such that, upon exiting the trajectory-altering structure, the selected projectile defines a modified trajectory that differs from the muzzle trajectory. The action is configured to transfer the selected cartridge from the magazine to the breech of the barrel and fire the selected cartridge.
    Type: Application
    Filed: August 29, 2018
    Publication date: May 23, 2019
    Inventors: Randy C. Tolman, Timothy G. Benish
  • Publication number: 20190153826
    Abstract: Perforation devices including gas supply structures and methods of utilizing the same. The perforation devices include a magazine, a barrel, an action, and the gas supply structure. The magazine is configured to contain a plurality of cartridges. The barrel extends between a breech, which is configured to receive a selected cartridge of the plurality of cartridges that includes a selected projectile, and a muzzle, which is configured, upon firing of the selected cartridge, to permit the selected projectile to exit the barrel at a muzzle velocity and with a muzzle trajectory. The action is configured to transfer the selected cartridge from the magazine to the breech of the barrel and to fire the selected cartridge. The gas supply structure is configured to provide a gas stream to the barrel and includes a surface gas source and a gas supply conduit extending between the surface gas source and the barrel.
    Type: Application
    Filed: September 13, 2018
    Publication date: May 23, 2019
    Inventors: Randy C. Tolman, Timothy G. Benish
  • Publication number: 20190128106
    Abstract: Remotely actuated screenout relief valves, systems and methods are disclosed herein. The methods include providing a proppant slurry stream that includes proppant to a casing conduit that is defined by a casing string that extends within a subterranean formation. The methods further include detecting an operational parameter that is indicative of a screenout event within the casing conduit. Responsive to the detecting, the methods include providing a flush fluid stream to the casing conduit, opening the remotely actuated screenout relief valve, and displacing the proppant from the casing conduit into the subterranean formation with the flush fluid stream via the remotely actuated screenout relief valve. The methods may further include closing the remotely actuated screenout relief valve. The systems include hydrocarbon wells that include the remotely actuated screenout relief valve and/or hydrocarbon wells that include controllers that are configured to perform at least a portion of the methods.
    Type: Application
    Filed: October 12, 2018
    Publication date: May 2, 2019
    Inventors: Timothy I. Morrow, Randy C. Tolman, Renzo M. Angeles Boza, Mark M. Disko, Max Deffenbaugh
  • Patent number: 10221639
    Abstract: The disclosure includes a method of placing a wireline device in a deviated well having a hydrostatic column, the method comprising placing a positioning device in a wellbore of the deviated well, electrically powering the positioning device, moving the wireline device across a deviated region of the wellbore using the positioning device, wherein moving includes creating a driving force using the positioning device, and wherein the driving force is at least one of: a mechanical driving force and a fluid pressure driving force.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: March 5, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Michael C. Romer, Randy C. Tolman
  • Patent number: 10221669
    Abstract: Wellbore tubulars including a plurality of selective stimulation ports and methods of utilizing the same. The wellbore tubulars include a tubular body including an external surface and an internal surface that defines a tubular conduit. The wellbore tubulars also include a plurality of selective stimulation ports, and each selective stimulation port includes a SSP conduit and an isolation device that is configured to selectively transition from a closed state to an open state responsive to a shockwave having greater than a threshold shockwave intensity. The methods include methods of stimulating a subterranean formation utilizing the wellbore tubulars. The methods also include methods of re-stimulating the subterranean formation utilizing the wellbore tubulars.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: March 5, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C. Tolman, P. Matthew Spiecker, Steve Lonnes, Timothy J. Hall
  • Patent number: 10221663
    Abstract: Disclosed techniques include a method of removing wellbore liquid from a wellbore that extends within a subterranean formation, comprising positioning a pump downhole in the wellbore, electrically powering the pump, expanding and contracting a membrane by pumping a fluid with the pump, wherein expanding and contracting the membrane creates a pressure for removing the wellbore liquid from the well, and removing the wellbore liquid from the well using the pressure.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: March 5, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Michael C. Romer, Randy C. Tolman, Louis-Claude Porel, Francois Ramon Leon Porel
  • Patent number: 10196886
    Abstract: Select-fire, downhole shockwave generation devices, hydrocarbon wells that include the shockwave generation devices, and methods of utilizing the same are disclosed herein. The shockwave generation devices are configured to generate a shockwave within a wellbore fluid that extends within a tubular conduit of a wellbore tubular. The shockwave generation devices include a core, a plurality of explosive charges arranged on an external surface of the core, and a plurality of triggering devices. Each of the plurality of triggering devices is associated with a selected one of the plurality of explosive charges and is configured to selectively initiate explosion of the selected one of the plurality of explosive charges. The methods include methods of generating a shockwave utilizing the downhole shockwave generation devices.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: February 5, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C. Tolman, P. Matthew Spiecker, Steve Lonnes
  • Patent number: 10138713
    Abstract: Autonomous wellbore devices with orientation-regulating structures are disclosed, including systems and methods using the same. The autonomous wellbore devices include a wellbore tool, a control structure, and an orientation-regulating structure. The wellbore tool is configured to autonomously perform a downhole operation within a wellbore conduit that extends within a subterranean formation. The control structure is programmed to determine that an actuation criterion has been satisfied and to provide an actuation signal to the wellbore tool. The orientation-regulating structure is configured to regulate a cross-sectional orientation of the wellbore tool while the autonomous wellbore device is being conveyed autonomously within the wellbore conduit.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: November 27, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C. Tolman, Timothy I. Morrow
  • Patent number: 10138707
    Abstract: A method of completing a well involving remediating a condition of screen-out that has taken place along a zone of interest. The method includes forming a wellbore, and lining at least a lower portion of the wellbore with a string of production casing and placing a valve along the production casing, wherein the valve creates a removable barrier to fluid flow within the bore. The barrier is removed by moving the valve in the event of a screen-out. This overcomes the barrier to fluid flow, thereby exposing ports along the production casing to the subsurface formation at or below the valve. Additional pumping takes place to pump the slurry through the exposed ports, thereby remediating the condition of screen-out.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: November 27, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C. Tolman, Timothy I Morrow, Timothy G Benish
  • Patent number: 10132143
    Abstract: A system for deploying and powering an electric submersible pump within a subterranean well. The system includes a tubing string having a wall forming a hollow interior, one end of the tubing string connected to the electric submersible pump; a flowable conductive material at least partially filling the hollow interior of the tubing string, the flowable conductive material forming a first conductive path; and a second conductive path, wherein the first conductive path and the second conductive path form a circuit for supplying power to the electric submersible pump. A method for deploying and powering an electric submersible pump within a subterranean well is also provided.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: November 20, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Michael C. Romer, William A. Symington, Randy C. Tolman
  • Patent number: 10132149
    Abstract: Remotely actuated screenout relief valves, systems and methods are disclosed herein. The methods include providing a proppant slurry stream that includes proppant to a casing conduit that is defined by a casing string that extends within a subterranean formation. The methods further include detecting an operational parameter that is indicative of a screenout event within the casing conduit. Responsive to the detecting, the methods include providing a flush fluid stream to the casing conduit, opening the remotely actuated screenout relief valve, and displacing the proppant from the casing conduit into the subterranean formation with the flush fluid stream via the remotely actuated screenout relief valve. The methods may further include closing the remotely actuated screenout relief valve. The systems include hydrocarbon wells that include the remotely actuated screenout relief valve and/or hydrocarbon wells that include controllers that are configured to perform at least a portion of the methods.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: November 20, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Timothy I. Morrow, Randy C. Tolman, Renzo M. Angeles Boza, Mark M. Disko, Max Deffenbaugh
  • Publication number: 20180313195
    Abstract: A system for removing wellbore liquids from a wellbore, the wellbore traversing a subterranean formation and having a tubular that extends within at least a portion of the wellbore. The system includes a positive-displacement solid state pump comprising a fluid chamber, an inlet and an outlet port, each in fluid communication with the fluid chamber, at least one solid state actuator, a first one-way check valve positioned between the inlet port and the fluid chamber, and/or a second one-way check valve positioned between the outlet port and the fluid chamber, the at least one solid state actuator configured to operate at or near its resonance frequency, the solid state pump positioned within the wellbore; and means for powering the solid state pump. A method for removing fluids from a subterranean well is also provided.
    Type: Application
    Filed: April 27, 2018
    Publication date: November 1, 2018
    Inventors: Michael C. Romer, Randy C. Tolman, Robert A. Frantz III, Conal H. O'Neill
  • Publication number: 20180313347
    Abstract: A nested bellows pump including a housing having a first end and a second end, the housing having a cylindrical body, the cylindrical body having an inner wall; a traveling bulkhead, the traveling bulkhead sealingly positionable along the inner wall of the cylindrical body; a first inner bellows, the first inner bellows connected to the housing, and the second bellows is connected to the traveling bulkhead; a second inner bellows connected to the traveling bulkhead, and the second end of the second inner bellows is connected to the housing; a first outer bellows connected to the housing, and the second end of the first outer bellows is connected to the traveling bulkhead; and a second outer bellows connected to the traveling bulkhead, and the second end of the second outer bellows is connected to the second end of the housing.
    Type: Application
    Filed: April 4, 2018
    Publication date: November 1, 2018
    Inventors: Randy C. Tolman, Michael C. Romer
  • Patent number: 10087719
    Abstract: A method of disposing of fluids produced from a wellbore extending into a subsurface formation, the subsurface formation having a production zone and a disposal zone, at least a portion of the wellbore lined with a string of production casing. The method includes placing a wellbore tubular conduit within the casing; placing a pump in fluid communication with the wellbore tubular conduit, the pump having an inlet and a discharge, the inlet in fluid communication with a source of produced fluids; and injecting the produced fluids through a plurality of perforations positioned about the casing into a disposal zone of the subsurface formation. A system for disposing of fluids produced from a wellbore extending into a subsurface formation is also provided.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: October 2, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Randy C. Tolman, Michael C. Romer