Patents by Inventor Kojiro Nishimiya

Kojiro Nishimiya 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).

  • Downhole caliper using multiple acoustic transducers
    Patent number: 10281607
    Abstract: A downhole tool for real-time caliper measurements is provided. The downhole tool comprises multiple acoustic transducers mounted at different positions of the tool, and a control system. The control system drives the multiple transducers, receives pressure echo signals from the transducers, records the pressure echo signals in the memory, extracts data of two-way transit time and echo amplitude from the echo signals, and computes at least one of a borehole diameter, a tool center position, and an acoustic slowness or velocity of downhole fluid, based on the data of transit time and echo amplitude.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: May 7, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Hiroshi Hori, Yoshino Matsumoto, Kojiro Nishimiya, Kiyomitsu Hikida, Jean-Christophe Auchere
  • Downhole Caliper Using Multiple Acoustic Transducers
    Publication number: 20170115423
    Abstract: A downhole tool for real-time caliper measurements is provided. The downhole tool comprises multiple acoustic transducers mounted at different positions of the tool, and a control system. The control system drives the multiple transducers, receives pressure echo signals from the transducers, records the pressure echo signals in the memory, extracts data of two-way transit time and echo amplitude from the echo signals, and computes at least one of a borehole diameter, a tool center position, and an acoustic slowness or velocity of downhole fluid, based on the data of transit time and echo amplitude.
    Type: Application
    Filed: October 26, 2016
    Publication date: April 27, 2017
    Inventors: Hiroshi Hori, Yoshino Matsumoto, Kojiro Nishimiya, Kiyomitsu Hikida, Jean-Christophe Auchere