Patents by Inventor Choon Fei Wong

Choon Fei Wong 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).

  • Secure activation of a downhole device
    Patent number: 7347278
    Abstract: A system includes a well tool for deployment in a well, a controller, and a link coupled between the controller and the well tool. The well tool comprises plural control units, each of the plural control units having a microprocessor and an initiator coupled to the microprocessor. Each microprocessor is adapted to communicate bi-directionally with the controller. The controller is adapted to send a plurality of activation commands to respective microprocessors to activate the respective control units. Each activation command containing a unique identifier corresponding to a respective control unit.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: March 25, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Nolan C. Lerche, James E. Brooks, Choon Fei Wong
  • Providing electrical isolation for a downhole device
    Patent number: 7007756
    Abstract: An isolation apparatus is provided between an electrical conductor and an electrically-activated well tool. The isolation apparatus has a blocking element to enable a signal having a first electrical polarity to pass through the element. The blocking element blocks a signal having a second electrical polarity.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: March 7, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Nolan C. Lerche, James E. Brooks, Choon Fei Wong
  • Providing electrical isolation for a downhole device
    Publication number: 20040108114
    Abstract: An isolation apparatus is provided between an electrical conductor and an electrically-activated well tool. The isolation apparatus has a blocking element to enable a signal having a first electrical polarity to pass through the element. The blocking element blocks a signal having a second electrical polarity.
    Type: Application
    Filed: November 20, 2003
    Publication date: June 10, 2004
    Inventors: Nolan C. Lerche, James E. Brooks, Choon Fei Wong