Patents by Inventor Daryl Stevenson

Daryl Stevenson 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: 11473161
    Abstract: A device for heating and quenching a tubular member has a central axis. The device includes a first quenching ring, a second quenching ring axially spaced from the first quenching ring, and a heating ring axially positioned between the first quenching ring and the second quenching ring. Each quenching ring and the heating ring is configured to receive the tubular member. The heating ring is fixably coupled to the first quenching ring and the second quenching ring. The heating ring includes an induction coil configured to heat an annular target zone along the tubular member. The first quenching ring is configured to deliver a first quenching fluid to the target zone and a first annular heat affected zone along the tubular member, and the second quenching ring is configured to deliver a second quenching fluid to the target zone and a second annular heat affected zone along the tubular member.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: October 18, 2022
    Assignee: GRANT PRIDECO, L.P.
    Inventors: Daryl Stevenson, David Charles Lynch, Christopher Alan Conrey, Michael Wade McCain
  • Patent number: 11198919
    Abstract: A system for air quenching a heat treated element comprises a tubular component, an internal air quench device moveably disposed within the interior of the tubular component, and an external air quench device moveably disposed about the tubular component. The internal air quench device comprises a nozzle configured to induce an airflow within the tubular component. The external air quenching device can comprise an annular ring disposed about the tubular component that is configured to generate a cone of air about the tubular component.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: December 14, 2021
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: David Martin Ellis, Luis Marcos Cadena, Christopher Alan Conrey, Daryl Stevenson
  • Patent number: 10841985
    Abstract: A system and method for heat treating a tubular. In one embodiment, a system for heat treating a tubular includes a first coil and a second coil. The first coil is configured to circumferentially surround the tubular and induce, from without the tubular, current flow in a cylindrical portion of the tubular adjacent the first coil. The second coil is configured to be inserted into a bore of the tubular and induce, from within the tubular, in conjunction with the first coil, current flow in the cylindrical portion of the tubular.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: November 17, 2020
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Kevin Joseph Wyble, Daniel Lyle Hannahs, Daryl Stevenson, Shawn Lee Cunningham
  • Publication number: 20200299794
    Abstract: A device for heating and quenching a tubular member has a central axis. The device includes a first quenching ring, a second quenching ring axially spaced from the first quenching ring, and a heating ring axially positioned between the first quenching ring and the second quenching ring. Each quenching ring and the heating ring is configured to receive the tubular member. The heating ring is fixably coupled to the first quenching ring and the second quenching ring. The heating ring includes an induction coil configured to heat an annular target zone along the tubular member. The first quenching ring is configured to deliver a first quenching fluid to the target zone and a first annular heat affected zone along the tubular member, and the second quenching ring is configured to deliver a second quenching fluid to the target zone and a second annular heat affected zone along the tubular member.
    Type: Application
    Filed: November 21, 2018
    Publication date: September 24, 2020
    Applicant: GRANT PRIDECO, L.P.
    Inventors: Daryl Stevenson, David Charles Lynch, Christopher Alan Conrey, Michael Wade McCain
  • Publication number: 20190276908
    Abstract: A system for air quenching a heat treated element comprises a tubular component, an internal air quench device moveably disposed within the interior of the tubular component, and an external air quench device moveably disposed about the tubular component. The internal air quench device comprises a nozzle configured to induce an airflow within the tubular component. The external air quenching device can comprise an annular ring disposed about the tubular component that is configured to generate a cone of air about the tubular component.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 12, 2019
    Inventors: David Martin Ellis, Luis Marcos Cadena, Christopher Alan Conrey, Daryl Stevenson
  • Patent number: 10344346
    Abstract: A system for air quenching a heat treated element comprises a tubular component, an internal air quench device moveably disposed within the interior of the tubular component, and an external air quench device moveably disposed about the tubular component. The internal air quench device comprises a nozzle configured to induce an airflow within the tubular component. The external air quenching device can comprise an annular ring disposed about the tubular component that is configured to generate a cone of air about the tubular component.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: July 9, 2019
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: David Martin Ellis, Luis Marcos Cadena, Christopher Alan Conrey, Daryl Stevenson
  • Publication number: 20180324902
    Abstract: A system and method for heat treating a tubular. In one embodiment, a system for heat treating a tubular includes a first coil and a second coil. The first coil is configured to circumferentially surround the tubular and induce, from without the tubular, current flow in a cylindrical portion of the tubular adjacent the first coil. The second coil is configured to be inserted into a bore of the tubular and induce, from within the tubular, in conjunction with the first coil, current flow in the cylindrical portion of the tubular.
    Type: Application
    Filed: July 2, 2018
    Publication date: November 8, 2018
    Inventors: Kevin Joseph Wyble, Daniel Lyle Hannahs, Daryl Stevenson, Shawn Lee Cunningham
  • Patent number: 10034330
    Abstract: A system and method for heat treating a tubular. In one embodiment, a system for heat treating a tubular includes a first coil and a second coil. The first coil is configured to circumferentially surround the tubular and induce, from without the tubular, current flow in a cylindrical portion of the tubular adjacent the first coil. The second coil is configured to be inserted into a bore of the tubular and induce, from within the tubular, in conjunction with the first coil, current flow in the cylindrical portion of the tubular.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 24, 2018
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Kevin Joseph Wyble, Daniel Lyle Hannahs, Daryl Stevenson, Shawn Lee Cunningham
  • Publication number: 20160298206
    Abstract: A system for air quenching a heat treated element comprises a tubular component, an internal air quench device moveably disposed within the interior of the tubular component, and an external air quench device moveably disposed about the tubular component. The internal air quench device comprises a nozzle configured to induce an airflow within the tubular component. The external air quenching device can comprise an annular ring disposed about the tubular component that is configured to generate a cone of air about the tubular component.
    Type: Application
    Filed: April 9, 2015
    Publication date: October 13, 2016
    Inventors: David Martin Ellis, Luis Marcos Cadena, Christopher Alan Conrey, Daryl Stevenson
  • Publication number: 20140263284
    Abstract: A system and method for heat treating a tubular. In one embodiment, a system for heat treating a tubular includes a first coil and a second coil. The first coil is configured to circumferentially surround the tubular and induce, from without the tubular, current flow in a cylindrical portion of the tubular adjacent the first coil. The second coil is configured to be inserted into a bore of the tubular and induce, from within the tubular, in conjunction with the first coil, current flow in the cylindrical portion of the tubular.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: NATIONAL OILWELL VARCO, L.P.
    Inventors: Kevin Joseph Wyble, Daniel Lyle Hannahs, Daryl Stevenson, Shawn Lee Cunningham