Patents by Inventor Cory Don Hillis

Cory Don Hillis 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).

  • Nested drill bit assembly for drilling with casing
    Patent number: 11643879
    Abstract: A nested drill bit assembly is disclosed for drilling a wellbore, comprising a parent bit and at least one child bit nested within the parent bit. Each bit in the nested drill bit assembly may be driven by a respective casing that gets cemented in place as part of a drilling with casing system. The parent bit and child bit(s) may be rotated together, with the parent bit and child bit collectively defining a contiguous cutting profile for drilling an initial segment of the wellbore. A driver is then lowered into the casing for connection to the child bit to drill beyond the parent bit. The driver may be configured as a drive bit for drilling through material leftover from a cementing operation prior to connecting to the child bit.
    Type: Grant
    Filed: August 3, 2021
    Date of Patent: May 9, 2023
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Bo Gao, Cory Don Hillis
  • Nested Drill Bit Assembly For Drilling With Casing
    Publication number: 20230043864
    Abstract: A nested drill bit assembly is disclosed for drilling a wellbore, comprising a parent bit and at least one child bit nested within the parent bit. Each bit in the nested drill bit assembly may be driven by a respective casing that gets cemented in place as part of a drilling with casing system. The parent bit and child bit(s) may be rotated together, with the parent bit and child bit collectively defining a contiguous cutting profile for drilling an initial segment of the wellbore. A driver is then lowered into the casing for connection to the child bit to drill beyond the parent bit. The driver may be configured as a drive bit for drilling through material leftover from a cementing operation prior to connecting to the child bit.
    Type: Application
    Filed: August 3, 2021
    Publication date: February 9, 2023
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Bo Gao, Cory Don Hillis