Patents by Inventor Yongzhong Cai

Yongzhong Cai 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).

  • Manufacture of roller cone drill bits
    Patent number: 12065884
    Abstract: A method of manufacturing a roller cone includes machining a cone blank and thereby defining one or more land surfaces and one or more insert grooves on the cone blank, surface hardening the cone blank, and milling a plurality of recesses into at least one of the one or more land surfaces. The method further includes subjecting the cone blank to a quenching process, forming an insert hole at each recess, and inserting an insert into each insert hole.
    Type: Grant
    Filed: December 3, 2021
    Date of Patent: August 20, 2024
    Assignee: Taurex Drill Bits, LLC
    Inventors: Yongzhong Cai, Dongze Yang, Yuan Yi, Dustin Lyles, Terry Vance Morris
  • MANUFACTURE OF ROLLER CONE DRILL BITS
    Publication number: 20220178210
    Abstract: A method of manufacturing a roller cone includes machining a cone blank and thereby defining one or more land surfaces and one or more insert grooves on the cone blank, surface hardening the cone blank, and milling a plurality of recesses into at least one of the one or more land surfaces. The method further includes subjecting the cone blank to a quenching process, forming an insert hole at each recess, and inserting an insert into each insert hole.
    Type: Application
    Filed: December 3, 2021
    Publication date: June 9, 2022
    Applicants: King Dream Public Limited Company, Taurex Drill Bits, LLC
    Inventors: Yongzhong Cai, Dongze Yang, Yuan Yi, Dustin Lyles, Terry Vance Morris