Patents by Inventor Marcial Nakamura

Marcial Nakamura 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).

  • Signal conducting detonating cord
    Patent number: 7661366
    Abstract: A downhole perforating device includes: a perforating gun having incorporated therein at least two shape charges; an elongated detonating cord incorporated with the perforating gun and extending along a length of the perforating gun, the detonating cord including: a flexible jacket surrounding an explosive; and a communication medium extending within or attached onto the flexible jacket layer.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: February 16, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: John Fuller, Marcial Nakamura, Michael Bertoja
  • SIGNAL CONDUCTING DETONATING CORD
    Publication number: 20090159283
    Abstract: A downhole perforating device includes: a perforating gun having incorporated therein at least two shape charges; an elongated detonating cord incorporated with the perforating gun and extending along a length of the perforating gun, the detonating cord including: a flexible jacket surrounding an explosive; and a communication medium extending within or attached onto the flexible jacket layer.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 25, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: John Fuller, Marcial Nakamura, Michael Bertoja