Patents by Inventor Andrew Wee-Mien Wong

Andrew Wee-Mien 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).

  • Shifting apparatus and method
    Patent number: 7617875
    Abstract: A device for shifting a sliding sleeve. The sliding sleeve is concentrically positioned within a well, and wherein the well is in communication with a hydrocarbon reservoir. In the most preferred embodiment, the device comprises an outer housing forming an annulus with the well and a power piston slidably disposed within the outer housing. The power piston includes an upper shoulder configured to form an annular chamber and a tubular chamber relative to the outer housing, a lower shoulder configured to form an atmospheric chamber relative to the outer housing. The device further comprises a first latch for preventing upward movement of the power piston, a second latch for preventing downward movement of the power piston, and wherein movement of the power piston shifts the sliding sleeve.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: November 17, 2009
    Assignee: PetroQuip Energy Services, LLP
    Inventors: William J. Darnell, Bryan Lane, William Tyler Livingston, Andrew Wee-Mien Wong
  • Shifting apparatus and method
    Publication number: 20080257558
    Abstract: A device for shifting a sliding sleeve. The sliding sleeve is concentrically positioned within a well, and wherein the well is in communication with a hydrocarbon reservoir. In the most preferred embodiment, the device comprises an outer housing forming an annulus with the well and a power piston slidably disposed within the outer housing. The power piston includes an upper shoulder configured to form an annular chamber and a tubular chamber relative to the outer housing, a lower shoulder configured to form an atmospheric chamber relative to the outer housing. The device further comprises a first latch for preventing upward movement of the power piston, a second latch for preventing downward movement of the power piston, and wherein movement of the power piston shifts the sliding sleeve.
    Type: Application
    Filed: April 20, 2007
    Publication date: October 23, 2008
    Inventors: William J. Darnell, Bryan Lane, William Tyler Livingston, Andrew Wee-Mien Wong