Patents Assigned to Stewart & Stevenson
  • Patent number: 11767748
    Abstract: A system for stimulating oil or gas production from a wellbore includes a hydraulic fracturing pump unit having one or more hydraulic fracturing pumps driven by one or more electrical fracturing motors, a variable frequency drive (VFD) controlling the electrical fracturing motors, a fracturing pump blower unit driven by a blower motor, and a fracturing pump lubrication unit having a lubrication pump driven by a lubrication motor and a cooling fan driven by a cooling motor. The system may further include a blender unit and a hydration unit. A system control unit may control the operational parameters of the system.
    Type: Grant
    Filed: July 8, 2022
    Date of Patent: September 26, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventors: Mark Payne, Haomin Lin, Tom Robertson
  • Patent number: 11753916
    Abstract: An integrated fracking system includes a substructure assembly including one or more frame rails. The integrated fracking system includes a pump subsystem having a frac pump and a motor. The pump subsystem is coupled to the frame rails of the substructure assembly. The integrated fracking system includes a variable frequency drive, a transformer, and a cooling subsystem, each coupled to the frame rails of the substructure assembly.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: September 12, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventors: Brian Sharp, Chad Joost, Chris Harvell, Paul Smith
  • Patent number: 11719230
    Abstract: A well servicing pump system for a hydraulic fracturing system includes a first permanent magnet motor, second permanent magnet motor, and crankshaft. The first and second permanent magnet motors each include a rotor mechanically coupled to or integrated with the crankshaft. The well servicing pump may include gearboxes coupled between the rotors and the crankshaft. The well servicing pump system also includes a fluid section that includes an inlet, a pressurization chamber, and an outlet. The inlet and outlet are fluidly coupled to the pressurization chamber. The well servicing pump also includes a plunger mechanically coupled to the crankshaft, the plunger at least partially positioned within the pressurization chamber.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: August 8, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventors: Filiberto Garcia, Chris Harvell, Chad Joost, Brian Sharp, Paul Smith
  • Patent number: 11713633
    Abstract: A dry product additive system includes a skid, a hopper, a pickup funnel, a feeder system, a supply pump, and an eductor assembly. The feeder system may be configured to transport product from the hopper to the pickup funnel. The eductor assembly including a suction inlet, a motive inlet, and an outlet. The suction inlet may be coupled to the pickup funnel by a suction hose. The motive inlet may be coupled to the supply pump by a motive fluid hose.
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: August 1, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventors: Jeff Smith, Brian Sharp, Mark Payne
  • Patent number: 11623170
    Abstract: An air filtration system is coupled to an inlet of an enclosure of or to a piece of equipment. The air filtration system is coupled to the enclosure at the air inlet such that air entering the enclosure through the air inlet passes through the air filtration system. The air filtration system includes a frame assembly. The frame assembly includes an outer frame and a support mesh. The outer frame is coupled to the enclosure. The air filtration system includes a door assembly. The door assembly includes a door frame and a door support mesh. The door assembly is received by and mechanically coupled to the frame assembly. The air filtration system includes filter media positioned in an interior of the air filtration system defined by the frame assembly and the door assembly.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: April 11, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventor: Donald Kobs
  • Patent number: 11598190
    Abstract: An integrated fracking system may include a substructure assembly including one or more frame rails. The integrated fracking system may include a variable frequency drive (VFD) coupled to the frame rails of the substructure assembly. The integrated fracking system may include a transformer coupled to the frame rails of the substructure assembly. The integrated fracking system may include a pump subsystem. The pump subsystem may include a first frac pump, a first motor operatively coupled to the first frac pump, a second frac pump, and a second motor operatively coupled to the second frac pump. The pump subsystem may be coupled to the frame rails of the substructure assembly.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: March 7, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventors: Brian Sharp, Chad Joost, Chris Harvell, Paul Smith, Filiberto Garcia, Adam Lambertus, Jeff Smith
  • Patent number: 11578579
    Abstract: A frac system includes power generation equipment and a power storage device used to provide electric power to one or more pieces of frac equipment. The frac system includes a power controller used to control the source of the power to the frac equipment. The power controller may measure the charge status for the power storage device and the electrical power load being used by the frac equipment. The power controller may engage or disengage the power generation equipment based on the measured charge status and electrical power load, may control the source of the power provided to the frac equipment, and may control whether the power storage device is being charged.
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: February 14, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventors: Chad Joost, Chris Harvell, Brian Sharp, Paul Smith, Ronnie Stover
  • Patent number: 11549506
    Abstract: A method includes supplying a plurality of generators, each generator in electrical communication with a switchgear with each switchgear in data communication with a generator data management system. The method also includes supplying a plurality of electrically driven fracturing pumps with each electrically driven fracturing pump in data communication with pump data management system. Further, the method includes supplying a load shedding system, the load shedding system in data communication with the generator data management system and a pump control system, the pump control system in data communication with the pump data management system. The method includes determining which pumps should have speed reduced by the load shedding system and reducing the speed of the pumps determined by the load shedding system using the pump control system.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: January 10, 2023
    Assignee: STEWART & STEVENSON LLC
    Inventors: Chris Harvell, Paul Smith, Mark Payne
  • Patent number: 11408267
    Abstract: A system for stimulating oil or gas production from a wellbore includes a hydraulic fracturing pump unit having one or more hydraulic fracturing pumps driven by one or more electrical fracturing motors, a variable frequency drive (VFD) controlling the electrical fracturing motors, a fracturing pump blower unit driven by a blower motor, and a fracturing pump lubrication unit having a lubrication pump driven by a lubrication motor and a cooling fan driven by a cooling motor. The system may further include a blender unit and a hydration unit. A system control unit may control the operational parameters of the system.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: August 9, 2022
    Assignee: STEWART & STEVENSON LLC
    Inventors: Mark Payne, Haomin Lin, Tom Robertson
  • Patent number: 10994445
    Abstract: A system for producing homogenized oil field gel including a power unit, a control system, a feed tank, a hopper, and a piping assembly that includes inlet and outlet manifolds, centrifugal pumps, and metering devices for filling the feed tank and handling a discharge of oilfield gel. The system further includes a powder hydration component and liquid chemical equipment. The method for producing homogenized oil field gel includes a guar powder procedure including a controlled sequence for starting and stopping a venturi mixer in a hydration unit. The method for producing homogenized oil field gel further includes a liquefied gel concentrate procedure including a metering and chemical injection procedure for mixing a liquefied gel concentrate.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: May 4, 2021
    Assignee: STEWART & STEVENSON LLC
    Inventor: Stephen M. Saffioti
  • Patent number: 10851638
    Abstract: A system for stimulating oil or gas production from a wellbore includes a hydraulic fracturing pump unit having one or more hydraulic fracturing pumps driven by one or more electrical fracturing motors, a variable frequency drive (VFD) controlling the electrical fracturing motors, a fracturing pump blower unit driven by a blower motor, and a fracturing pump lubrication unit having a lubrication pump driven by a lubrication motor and a cooling fan driven by a cooling motor. The system may further include a blender unit and a hydration unit. A system control unit may control the operational parameters of the system.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: December 1, 2020
    Assignee: STEWART & STEVENSON LLC
    Inventors: Mark Payne, Haomin Lin, Tom Robertson
  • Patent number: 9840881
    Abstract: An injector head used in coiled tubing systems including at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops having a chain. The injector head further includes a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket disposed at the second end of the chain loop. In the injector head, there is a force applied to the floating bottom sprocket to maintain the chain loop at a desired chain tension. Additionally, the injector head includes a tension cylinder that automatically maintains the chain loop at the desired chain tension.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: December 12, 2017
    Assignee: STEWART & STEVENSON, LLC
    Inventor: Rodney Earl Lancaster
  • Patent number: 9764497
    Abstract: A system for producing homogenized oil field gel including a power unit, a control system, a feed tank, a hopper, and a piping assembly that includes inlet and outlet manifolds, centrifugal pumps, and metering devices for filling the feed tank and handling a discharge of oilfield gel. The system further includes a powder hydration component and liquid chemical equipment. The method for producing homogenized oil field gel includes a guar powder procedure including a controlled sequence for starting and stopping a venturi mixer in a hydration unit. The method for producing homogenized oil field gel further includes a liquefied gel concentrate procedure including a metering and chemical injection procedure for mixing a liquefied gel concentrate.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: September 19, 2017
    Assignee: STEWART & STEVENSON, LLC
    Inventor: Stephen M. Saffioti
  • Patent number: 9156651
    Abstract: A tubing reel assembly including a drive assembly, a swivel assembly, a reel, and a stand. The drive assembly includes a drive assembly adapter that connects the reel and the drive assembly, a drive assembly mount that connects the drive assembly and the stand, and a rotational power source. The swivel assembly includes a swivel assembly adapter that connects the reel and the swivel assembly, a swivel assembly mount that connects the swivel assembly and the stand, a bearing, and a hydraulic swivel. The reel includes recessed hubs that allow the overall width of the tubing reel assembly to be reduced, and the recessed hubs are used for connecting the drive assembly to the reel and the swivel assembly to the reel.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: October 13, 2015
    Assignee: Stewart & Stevenson, LLC
    Inventor: DoSeo Park
  • Patent number: 9091129
    Abstract: An injector head used in coiled tubing systems including at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops having a chain. The injector head further includes a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket disposed at the second end of the chain loop. In the injector head, there is a force applied to the floating bottom sprocket to maintain the chain loop at a desired chain tension. Additionally, the injector head includes a tension cylinder that automatically maintains the chain loop at the desired chain tension.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: July 28, 2015
    Assignee: Stewart & Stevenson, LLC
    Inventor: Rodney Earl Lancaster
  • Publication number: 20130142006
    Abstract: A system for producing homogenized oil field gel including a power unit, a control system, a feed tank, a hopper, and a piping assembly that includes inlet and outlet manifolds, centrifugal pumps, and metering devices for filling the feed tank and handling a discharge of oilfield gel. The system further includes a powder hydration component and liquid chemical equipment. The method for producing homogenized oil field gel includes a guar powder procedure including a controlled sequence for starting and stopping a venturi mixer in a hydration unit. The method for producing homogenized oil field gel further includes a liquefied gel concentrate procedure including a metering and chemical injection procedure for mixing a liquefied gel concentrate.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 6, 2013
    Applicant: Stewart & Stevenson, LLC
    Inventor: Stewart & Stevenson, LLC
  • Publication number: 20120247787
    Abstract: An injector head used in coiled tubing systems including at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops having a chain. The injector head further includes a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket disposed at the second end of the chain loop. In the injector head, there is a force applied to the floating bottom sprocket to maintain the chain loop at a desired chain tension. Additionally, the injector head includes a tension cylinder that automatically maintains the chain loop at the desired chain tension.
    Type: Application
    Filed: April 4, 2012
    Publication date: October 4, 2012
    Applicant: Stewart & Stevenson, LLC
    Inventor: Rodney Earl Lancaster
  • Publication number: 20120247579
    Abstract: A tubing reel assembly including a drive assembly, a swivel assembly, a reel, and a stand. The drive assembly includes a drive assembly adapter that connects the reel and the drive assembly, a drive assembly mount that connects the drive assembly and the stand, and a rotational power source. The swivel assembly includes a swivel assembly adapter that connects the reel and the swivel assembly, a swivel assembly mount that connects the swivel assembly and the stand, a bearing, and a hydraulic swivel. The reel includes recessed hubs that allow the overall width of the tubing reel assembly to be reduced, and the recessed hubs are used for connecting the drive assembly to the reel and the swivel assembly to the reel.
    Type: Application
    Filed: April 4, 2012
    Publication date: October 4, 2012
    Applicant: Stewart & Stevenson, LLC
    Inventor: Do Seo Park
  • Patent number: 6622846
    Abstract: A cargo loader platform having an array of roller assemblies on the deck thereof which are capable of moving a container longitudinally or laterally or rotating it includes several independently driven groups of roller assemblies. The groups include groups along the sides of the platform having drive axes parallel to the loader axis, groups near the center of the platform having a separate drive axes that are perpendicular to the loader axis, and groups down the center of the platform having drive axes parallel to the loader axis. Large diameter, driven cylindrical rollers are mounted on the outer sides of the sides and rear end of the platform to assist in moving cargo onto the deck.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: September 23, 2003
    Assignee: Stewart & Stevenson
    Inventor: William C. Dean
  • Patent number: 6450262
    Abstract: Two types of isolation tools are disclosed for installation between the upward end of the LMRP and the lower end of a riser string in the drilling of a subsea well using dual gradient techniques, one of which is especially adapted for rotation about a rotating drill sling. Each type includes insert packer adapted to be closed about the drill string to divert drilling fluid in the annulus between the drill string and the subsea wellhead into lines extending along the side of the riser to the surface. The insert is selectively removable to permit conventional drilling.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: September 17, 2002
    Assignee: Stewart & Stevenson Services, Inc.
    Inventor: Albert M. Regan