Patents by Inventor Chris Li Yu Shan

Chris Li Yu Shan 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).

  • Publication number: 20140069659
    Abstract: A method can include selecting a ratio of a first effective cross-sectional area of a first component of a gas lift valve to a second effective cross-sectional area of a second component of the gas lift valve; charging a chamber of the gas lift valve; and positioning the gas lift valve in a pocket to expose the gas lift valve to a tubing pressure and a casing pressure, where transitioning of the gas lift valve from a closed state to an open state depends at least in part on the selected ratio. Various other apparatuses, systems, methods, etc., are also disclosed.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 13, 2014
    Inventors: Chao Wang, Winson Tiong Weng Keong, Chris Li Yu Shan, Ganesh Balasubramanian