Patents by Inventor Toshikazu Igi

Toshikazu Igi 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).

  • METHOD OF SUPPLYING CEMENT SLURRY AND METHOD OF DRILLING OR CEMENTING OF WELL USING THE SAME
    Publication number: 20220316287
    Abstract: Cement slurry is prevented from coming into contact with hardening accelerator in a cementing tool in a simple manner. The method of supplying cement slurry has the steps of: adding capsule C to cement slurry, wherein capsule C is filled with hardening accelerator for the cement slurry; and supplying the cement slurry to a hole, wherein capsule C is added to the cement slurry, and the cement slurry is supplied through cementing tool 105 that is provided in the hole. Capsule C melts or collapses after a specific amount of time passes, wherein the specific amount of time is longer than a flow out time, which is a time for capsule C to flow out of cementing tool 105 after capsule C is added to the cement slurry.
    Type: Application
    Filed: June 3, 2019
    Publication date: October 6, 2022
    Inventors: Masato YOSHIOKA, Toshikazu IGI
  • Long casing patch method
    Patent number: 9481156
    Abstract: To reduce operation time and ensure strength of a covering member.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: November 1, 2016
    Assignee: KANTO NATURAL GAS DEVELOPMENT CO., LTD.
    Inventor: Toshikazu Igi
  • LONG CASING PATCH METHOD
    Publication number: 20150352823
    Abstract: To reduce operation time and ensure strength of a covering member.
    Type: Application
    Filed: March 26, 2014
    Publication date: December 10, 2015
    Inventor: Toshikazu Igi