Patents by Inventor Gary KOHN

Gary KOHN 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: 11352853
    Abstract: A system and method directed to performing a single trip cementing operation at spaced out locations within a hydrocarbon zone during the construction of a wellbore using a wellbore fluid communication tool. In an embodiment, the tool is deployed on a tubular string above the hydrocarbon zone and comprises a housing including at least one radial port, a seal assembly, an outer sleeve assembly having a door assembly operable to translate across the seal assembly while closed, an inner mandrel and a seat assembly. The tool facilitates the placement of cement within a wellbore annulus from an uphole position in lieu of at the bottom of the wellbore thereby minimizing the pressure required to perform cementing job. At the same time, the ability for the door assembly to translate across the seal assembly while closed ensures the seal is not damaged from repetitive opening and closing of the door assembly.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: June 7, 2022
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Stephen Ross Maddux, Gary Kohn
  • Publication number: 20210189835
    Abstract: A system and method directed to performing a single trip cementing operation at spaced out locations within a hydrocarbon zone during the construction of a wellbore using a wellbore fluid communication tool. In an embodiment, the tool is deployed on a tubular string above the hydrocarbon zone and comprises a housing including at least one radial port, a seal assembly, an outer sleeve assembly having a door assembly operable to translate across the seal assembly while closed, an inner mandrel and a seat assembly. The tool facilitates the placement of cement within a wellbore annulus from an uphole position in lieu of at the bottom of the wellbore thereby minimizing the pressure required to perform cementing job. At the same time, the ability for the door assembly to translate across the seal assembly while closed ensures the seal is not damaged from repetitive opening and closing of the door assembly.
    Type: Application
    Filed: August 3, 2017
    Publication date: June 24, 2021
    Inventors: Stephen Ross Maddux, Gary Kohn
  • Patent number: 9869157
    Abstract: Reverse circulation cementing of a liner in a wellbore extending through a subterranean formation is presented. A running tool with expansion cone, release assembly, annular isolation device, and reverse circulation assembly is run-in with a liner. The annular isolation device is set against the casing. A valve, such as a dropped-ball operated sliding sleeve valve, opens reverse circulation ports for the cementing operation. The liner annulus is cemented using reverse circulation. The expandable liner hanger is expanded into engagement with the casing. Conventional circulation is restored. The running tool is released and pulled from the hole.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: January 16, 2018
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Emile Sevadjian, Gary Kohn, Arthur Stautzenberger, Richard Noffke, Grant Hartman, Stephen Maddux, Odee Daigle, Ryan Humphrey, David Matus
  • Publication number: 20160160603
    Abstract: A method for reverse circulation cementing of a liner in a wellbore extending through a subterranean formation is presented. A running tool with expansion cone, release assembly, annular isolation device, and reverse circulation assembly is run-in with a liner. The annular isolation device is set against the casing. A valve, such as a dropped-ball operated sliding sleeve valve, opens reverse circulation ports for the cementing operation. The liner annulus is cemented using reverse circulation. The expandable liner hanger is expanded into engagement with the casing. Conventional circulation is restored. The running tool is released and pulled from the hole.
    Type: Application
    Filed: October 9, 2013
    Publication date: June 9, 2016
    Inventors: Emile SEVADJIAN, Gary KOHN, Arthur STAUTZENBERGER, Richard NOFFKE, Grant HARTMAN, Stephen MADDUX, Odee DAIGLE, Ryan HUMPHREY, David MATUS