Patents by Inventor Roger L. Schultz

Roger L. Schultz 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).

  • Patent number: 10415324
    Abstract: A vortex-controlled variable flow resistance device ideal for use in a backpressure tool for advancing drill string in extended reach downhole operations. The characteristics of the pressure waves generated by the device are controlled by the growth and decay of vortices in the vortex chamber(s) of a flow path. The flow path is designed to produce alternating primary and secondary vortices—one clockwise and one counter-clockwise—where the primary vortex is stronger and produces higher backpressure than the secondary vortex. This in turn generates alternating weak and strong pressure pulses in the drill string. The weak pulses may be barely perceptible so that the effective frequency of the pulses is determined by the stronger primary vortices.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: September 17, 2019
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger L. Schultz, Andrew M. Ferguson
  • Publication number: 20190271204
    Abstract: A method of dislodging a tubular string or well equipment connected to the tubular string can include connecting a dislodging tool in the tubular string, so that a flow passage of the dislodging tool extends through the tubular string, deploying a plug into the dislodging tool, applying a pressure differential across the plug, thereby displacing the plug through a seat of the dislodging tool, and dislodging the tubular string or the component in response to the displacing. A dislodging system can include a dislodging tool connected as part of a tubular string, the dislodging tool including a flow passage and a seat configured to sealingly engage a plug deployed into the tubular string, and at least one of a jarring force, load, impact, shock wave, elastic strain release and pressure pulse being generated in the tubular string in response to displacement of the plug through the seat.
    Type: Application
    Filed: December 26, 2018
    Publication date: September 5, 2019
    Inventors: Brock W. WATSON, Roger L. SCHULTZ, Gregory A. KLIEWER
  • Patent number: 10400565
    Abstract: A method for fracturing a wellbore in a formation, including positioning one or more bidirectional rotary sleeves on tubular members into the wellbore; engaging a unidirectional rotary source in a first position with a first bidirectional rotary sleeve of the one or more bidirectional rotary sleeves; operating the unidirectional rotary source to rotate the first bidirectional rotary sleeve in a first rotational direction to open at least one port in the first bidirectional rotary sleeve for providing an open fluid pathway between the first bidirectional rotary sleeve and the formation; pumping fluid through the tubular members and through the opened port to fracture the formation; engaging the unidirectional rotary source in a second position with the first bidirectional rotary sleeve; and operating the unidirectional rotary source to rotate first bidirectional rotary sleeve in a second rotational direction to close the at least one port in the first bidirectional rotary sleeve.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: September 3, 2019
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger L. Schultz, Brock Watson, Andrew Ferguson, Stanley W. Loving
  • Publication number: 20190257172
    Abstract: A system for use with a subterranean well can include a deployment apparatus configured to deploy one or more plugging devices into a fluid flow. The plugging devices are conveyed into the well by the fluid flow. The deployment apparatus can include multiple queues, different numbers of the plugging devices being contained in respective different ones of the queues. A method of deploying plugging devices can include connecting multiple queues of the plugging devices to a conduit, and deploying the plugging devices from a selected combination of the queues into the conduit. In another system, each of the plugging devices may include a body, and lines or fibers extending outwardly from the body.
    Type: Application
    Filed: May 3, 2019
    Publication date: August 22, 2019
    Inventors: Brock W. WATSON, Gary P. FUNKHOUSER, Roger L. SCHULTZ, Gregory A. KLIEWER
  • Patent number: 10364634
    Abstract: A hydraulic jar for delivering impacts downhole. The jarring mechanism includes a cup-type piston that moves through a seal bore. The cup is deformable in response to fluid pressure so that it expands each time it moves through the seal bore to compensate for wear on the lip. Since only minimum interference is required between the piston and seal bore, less material may be used. This reduces the force required to reset the tool, which is particularly advantageous in horizontal wells. The seal bore may be slightly wider at the exit; the cup expands to this exit diameter, ensuring an interference fit as the cup travels back through the smaller diameter entry section. The entry end of the seal bore may include longitudinal grooves. This prevents the piston cup from rupturing by preventing a fluid seal around the lip until the most of cup is inside the seal bore.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: July 30, 2019
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Brock W. Watson, Roger L. Schultz
  • Publication number: 20190162035
    Abstract: A method can include deploying a plugging device into a well, the plugging device including a body, and an outer material enveloping the body and having a greater flexibility than a material of the body, and conveying the plugging device by fluid flow into engagement with the opening, the body preventing the plugging device from extruding through the opening, and the outer material blocking the fluid flow between the body and the opening. In another method, the plugging device can include at least two bodies, and a washer element connected between the bodies, the washer element being generally disk-shaped and comprising a hole, a line extending through the hole and connected to the bodies on respective opposite sides of the washer element, the washer element preventing the plugging device from being conveyed through the opening, and the washer element blocking the fluid flow through the opening.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 30, 2019
    Inventors: Gary P. FUNKHOUSER, Brock W. WATSON, Andrew M. FERGUSON, Jenna N. ROBERTSON, Roger L. SCHULTZ
  • Publication number: 20190162034
    Abstract: A method can include deploying a plugging device into a well, the plugging device including a body, and an outer material enveloping the body and having a greater flexibility than a material of the body, and conveying the plugging device by fluid flow into engagement with the opening, the body preventing the plugging device from extruding through the opening, and the outer material blocking the fluid flow between the body and the opening. In another method, the plugging device can include at least two bodies, and a washer element connected between the bodies, the washer element being generally disk-shaped and comprising a hole, a line extending through the hole and connected to the bodies on respective opposite sides of the washer element, the washer element preventing the plugging device from being conveyed through the opening, and the washer element blocking the fluid flow through the opening.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 30, 2019
    Inventors: Gary P. FUNKHOUSER, Brock W. WATSON, Andrew M. FERGUSON, Jenna N. ROBERTSON, Roger L. SCHULTZ
  • Patent number: 10301905
    Abstract: A casing string is augmented with one or more variable flow resistance devices or “vibrating tools” to facilitate advancement of the casing and distribution of the cement in the annulus once the casing is properly positioned. The method includes vibrating the casing string while advancing the casing down the wellbore or while the cement is pumped into the annulus, or both. After the cementing operation is completed, the devices may be drilled out to open the casing string for further operations. The casing string assembly may include a vibrating tool at the end in place of a conventional float shoe or float collar. Multiple vibrating tools can be employed in the casing string, and they may be combined with conventional float shoes and collars. Additionally, vibrating tools in the form of plugs can be pumped down and landed inside the casing string.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: May 28, 2019
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger L. Schultz, Chad A. Johnson, Andrew M. Ferguson
  • Publication number: 20190136662
    Abstract: A method for use with a subterranean well can include releasing flow conveyed plugging devices into the well, each of the plugging devices including a body and, extending outwardly from the body, at least one of lines and fibers, and the plugging devices blocking flow through respective openings in the well. Another method can include perforating a zone, releasing a set of flow conveyed plugging devices into the well, each of the plugging devices including a body and, extending outwardly from the body, at least one of lines and fibers, the set of plugging devices blocking flow through respective perforations in the zone, perforating another zone, releasing another set of the flow conveyed plugging devices into the well, and the second set of plugging devices blocking flow through respective perforations in the second zone.
    Type: Application
    Filed: January 3, 2019
    Publication date: May 9, 2019
    Inventors: Roger L. SCHULTZ, Brock W. WATSON, Andrew M. FERGUSON, Gary P. FUNKHOUSER
  • Publication number: 20190112892
    Abstract: A method of restoring flow through an opening in a well, the opening being blocked by a plugging device, can include conveying a well tool into the well, contacting the plugging device with the well tool, and permitting flow through the opening as a result of the contacting step. Another method of restoring flow through an opening blocked by a plugging device in a well can include conveying a well tool into the well, reducing pressure in the well with the well tool, and permitting flow through the opening as a result of the pressure reducing step.
    Type: Application
    Filed: December 10, 2018
    Publication date: April 18, 2019
    Inventors: Roger L. SCHULTZ, Brock W. WATSON, Andrew M. FERGUSON, Gary P. FUNKHOUSER
  • Patent number: 10233719
    Abstract: A method for use with a subterranean well can include releasing flow conveyed plugging devices into the well, each of the plugging devices including a body and, extending outwardly from the body, at least one of lines and fibers, and the plugging devices blocking flow through respective openings in the well. Another method can include perforating a zone, releasing a set of flow conveyed plugging devices into the well, each of the plugging devices including a body and, extending outwardly from the body, at least one of lines and fibers, the set of plugging devices blocking flow through respective perforations in the zone, perforating another zone, releasing another set of the flow conveyed plugging devices into the well, and the second set of plugging devices blocking flow through respective perforations in the second zone.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: March 19, 2019
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger L. Schultz, Brock W. Watson, Andrew M. Ferguson, Gary P. Funkhouser
  • Publication number: 20190032443
    Abstract: A method of forming multiple inclusions into a subterranean formation can include initiating the inclusions into the formation, the inclusions extending outwardly in respective multiple azimuthal orientations from a casing section, and flowing fluid into each of the inclusions individually, thereby extending the inclusions into the formation one at a time. A system for initiating inclusions outwardly into a subterranean formation from a wellbore can include a casing section having multiple flow channels therein, each of the flow channels being in communication with a respective one of multiple openings formed between adjacent pairs of circumferentially extendable longitudinally extending portions of the casing section. Another system can include a casing section, and an injection tool which engages the casing section and selectively directs fluid into each of the inclusions individually, whereby the inclusions are extended into the formation one at a time.
    Type: Application
    Filed: October 1, 2018
    Publication date: January 31, 2019
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Travis W. Cavender, Robert L. Pipkin, Timothy Hunter, Roger L. Schultz
  • Patent number: 10180048
    Abstract: Tools and methods for abrasively cutting downhole pipes and casing. The tools and methods are ideally suited for situations where the pipe to be cut or perforated is positioned partly or wholly inside another pipe and damage to the outer pipe must be avoided. The jet nozzles are positioned at a non-normal angle to the target surface to reduce the jets' effective cutting distance. While pumping the abrasive fluid, the jets are supported at a selected radial distance from the target surface so that within a predetermined operating time the jets will cut or perforate the inner pipe but leave the outer pipe substantially intact. The tool may be rotated with a motor to perform cutoff operations or held in a fixed position for perforating.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: January 15, 2019
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Brock W. Watson, Roger L. Schultz
  • Patent number: 10119356
    Abstract: A method of forming multiple inclusions into a subterranean formation can include initiating the inclusions into the formation, the inclusions extending outwardly in respective multiple azimuthal orientations from a casing section, and flowing fluid into each of the inclusions individually, thereby extending the inclusions into the formation one at a time. A system for initiating inclusions outwardly into a subterranean formation from a wellbore can include a casing section having multiple flow channels therein, each of the flow channels being in communication with a respective one of multiple openings formed between adjacent pairs of circumferentially extendable longitudinally extending portions of the casing section. Another system can include a casing section, and an injection tool which engages the casing section and selectively directs fluid into each of the inclusions individually, whereby the inclusions are extended into the formation one at a time.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: November 6, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Travis W. Cavender, Robert L. Pipkin, Timothy Hunter, Roger L. Schultz
  • Publication number: 20180252078
    Abstract: An abrasive perforator tool with a bypass flow channel. Two valve sleeves are slidingly mounted inside a tool housing for sequential deployment. The valve sleeves may be arranged end-to-end and may be sealed to the inside diameter of the housing. Each of the valve sleeves may be telescopically mounted in a retainer sleeve and releasably secured in the undeployed position. When the valve sleeves are ball-actuated, the ball seat in the first valve sleeve may be at the lower end of the sleeve. Initially, with both sleeves in the undeployed position, fluid flows straight through the main bore and out the outlet end. When the first valve sleeve is deployed, fluid is redirected to the nozzles for perforating, and subsequent deployment of the second valve sleeve blocks the nozzles and opens the bypass channel to reestablish flow out through the bottom of the tool.
    Type: Application
    Filed: March 1, 2017
    Publication date: September 6, 2018
    Inventor: Roger L. Schultz
  • Patent number: 10024136
    Abstract: A well system can include a well tool with a retarder chemical. The retarder chemical is released from the well tool into an annulus and retards setting of cement therein. A method of retarding setting of cement at a location in an annulus can include releasing a retarder chemical from a well tool connected in a casing string, after the cement is placed in the annulus. A well tool can include a valve that controls fluid communication via a port between an exterior of the tool and a flow passage extending through the tool, an annular recess, and a dispersible annular exterior component received in the recess. Another well tool can include a valve that controls fluid communication between an exterior of the tool and a flow passage extending through the well tool, an internal chamber, and a retarder chemical in the chamber.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: July 17, 2018
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Brock W. Watson, Roger L. Schultz, Andrew M. Ferguson
  • Publication number: 20180148994
    Abstract: A method of restoring flow through an opening in a well, the opening being blocked by a plugging device, can include conveying a well tool into the well, contacting the plugging device with the well tool, and permitting flow through the opening as a result of the contacting step. Another method of restoring flow through an opening blocked by a plugging device in a well can include conveying a well tool into the well, reducing pressure in the well with the well tool, and permitting flow through the opening as a result of the pressure reducing step.
    Type: Application
    Filed: April 26, 2016
    Publication date: May 31, 2018
    Inventors: Roger L. SCHULTZ, Brock W. WATSON, Andrew M. FERGUSON, Gary P. FUNKHOUSER
  • Patent number: 9920589
    Abstract: A system for use with a well can include a perforating assembly with at least one perforator, the perforating assembly conveyed through a wellbore with fluid flow through the wellbore, and plugging devices spaced apart from the perforating assembly in the wellbore, the plugging devices conveyed through the wellbore with the fluid flow. A method of deploying plugging devices in a wellbore can include conveying a perforating assembly including a dispensing tool through the wellbore, the dispensing tool including a container, and then releasing the plugging devices from the container into the wellbore at a downhole location. Another method of deploying plugging devices in a wellbore can include conveying the plugging devices through the wellbore with fluid flow through the wellbore, and conveying a perforating assembly through the wellbore while the plugging devices are being conveyed through the wellbore.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: March 20, 2018
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Brock W. Watson, Andrew M. Ferguson, Roger L. Schultz, Gary P. Funkhouser, Jenna N. Robertson
  • Publication number: 20180073321
    Abstract: A method of treating each of multiple formation zones in a subterranean well can include isolating two of the zones from each other in the wellbore with a plug assembly positioned in the wellbore; treating one of the zones by flowing a treatment fluid through openings that provide fluid communication between the wellbore and one of the zones; then blocking flow through the openings; increasing pressure in the wellbore in response to the blocking; and opening the plug assembly in response to the pressure increasing. A well treatment system for treating each of multiple zones intersected by a wellbore can include multiple plug assemblies in the wellbore, each of the plug assemblies isolating a respective adjacent pair of the zones from each other in the wellbore. Each of the plug assemblies opens in response to a respective predetermined pressure differential applied across the plug assembly.
    Type: Application
    Filed: September 14, 2017
    Publication date: March 15, 2018
    Inventors: Brock W. WATSON, Andrew M. FERGUSON, Roger L. SCHULTZ
  • Patent number: 9915107
    Abstract: A vortex-controlled variable flow resistance device ideal for use in a backpressure tool for advancing drill string in extended reach downhole operations. The characteristics of the pressure waves generated by the device are controlled by the growth and decay of vortices in the vortex chamber(s) of a flow path. The flow path is designed to produce alternating primary and secondary vortices—one clockwise and one counter-clockwise—where the primary vortex is stronger and produces higher backpressure than the secondary vortex. This in turn generates alternating weak and strong pressure pulses in the drill string. The weak pulses may be barely perceptible so that the effective frequency of the pulses is determined by the stronger primary vortices.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: March 13, 2018
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger L. Schultz, Andrew M. Ferguson