Patents Assigned to Stewart & Stevenson
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Patent number: 11767748Abstract: 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: GrantFiled: July 8, 2022Date of Patent: September 26, 2023Assignee: STEWART & STEVENSON LLCInventors: Mark Payne, Haomin Lin, Tom Robertson
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Patent number: 11753916Abstract: 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: GrantFiled: May 28, 2020Date of Patent: September 12, 2023Assignee: STEWART & STEVENSON LLCInventors: Brian Sharp, Chad Joost, Chris Harvell, Paul Smith
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Patent number: 11719230Abstract: 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: GrantFiled: November 13, 2020Date of Patent: August 8, 2023Assignee: STEWART & STEVENSON LLCInventors: Filiberto Garcia, Chris Harvell, Chad Joost, Brian Sharp, Paul Smith
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Patent number: 11713633Abstract: 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: GrantFiled: July 28, 2021Date of Patent: August 1, 2023Assignee: STEWART & STEVENSON LLCInventors: Jeff Smith, Brian Sharp, Mark Payne
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Patent number: 11623170Abstract: 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: GrantFiled: November 23, 2020Date of Patent: April 11, 2023Assignee: STEWART & STEVENSON LLCInventor: Donald Kobs
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Patent number: 11598190Abstract: 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: GrantFiled: May 28, 2021Date of Patent: March 7, 2023Assignee: STEWART & STEVENSON LLCInventors: Brian Sharp, Chad Joost, Chris Harvell, Paul Smith, Filiberto Garcia, Adam Lambertus, Jeff Smith
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Patent number: 11578579Abstract: 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: GrantFiled: October 6, 2020Date of Patent: February 14, 2023Assignee: STEWART & STEVENSON LLCInventors: Chad Joost, Chris Harvell, Brian Sharp, Paul Smith, Ronnie Stover
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Patent number: 11549506Abstract: 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: GrantFiled: July 20, 2020Date of Patent: January 10, 2023Assignee: STEWART & STEVENSON LLCInventors: Chris Harvell, Paul Smith, Mark Payne
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Patent number: 11408267Abstract: 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: GrantFiled: July 27, 2020Date of Patent: August 9, 2022Assignee: STEWART & STEVENSON LLCInventors: Mark Payne, Haomin Lin, Tom Robertson
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Patent number: 10994445Abstract: 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: GrantFiled: September 15, 2017Date of Patent: May 4, 2021Assignee: STEWART & STEVENSON LLCInventor: Stephen M. Saffioti
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Patent number: 10851638Abstract: 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: GrantFiled: April 1, 2019Date of Patent: December 1, 2020Assignee: STEWART & STEVENSON LLCInventors: Mark Payne, Haomin Lin, Tom Robertson
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Patent number: 9840881Abstract: 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: GrantFiled: July 27, 2015Date of Patent: December 12, 2017Assignee: STEWART & STEVENSON, LLCInventor: Rodney Earl Lancaster
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Patent number: 9764497Abstract: 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: GrantFiled: December 5, 2012Date of Patent: September 19, 2017Assignee: STEWART & STEVENSON, LLCInventor: Stephen M. Saffioti
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Patent number: 9156651Abstract: 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: GrantFiled: April 4, 2012Date of Patent: October 13, 2015Assignee: Stewart & Stevenson, LLCInventor: DoSeo Park
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Patent number: 9091129Abstract: 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: GrantFiled: April 4, 2012Date of Patent: July 28, 2015Assignee: Stewart & Stevenson, LLCInventor: Rodney Earl Lancaster
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Publication number: 20130142006Abstract: 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: ApplicationFiled: December 5, 2012Publication date: June 6, 2013Applicant: Stewart & Stevenson, LLCInventor: Stewart & Stevenson, LLC
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Publication number: 20120247787Abstract: 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: ApplicationFiled: April 4, 2012Publication date: October 4, 2012Applicant: Stewart & Stevenson, LLCInventor: Rodney Earl Lancaster
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Publication number: 20120247579Abstract: 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: ApplicationFiled: April 4, 2012Publication date: October 4, 2012Applicant: Stewart & Stevenson, LLCInventor: Do Seo Park
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Patent number: 6622846Abstract: 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: GrantFiled: April 29, 1999Date of Patent: September 23, 2003Assignee: Stewart & StevensonInventor: William C. Dean
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Patent number: 6450262Abstract: 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: GrantFiled: December 8, 2000Date of Patent: September 17, 2002Assignee: Stewart & Stevenson Services, Inc.Inventor: Albert M. Regan