Patents by Inventor Phu DONG

Phu DONG 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).

  • BACK PRESSURE VALVE WITH LATCHING ENGAGEMENT SYSTEM AND METHOD
    Publication number: 20230228167
    Abstract: This disclosure presents a latch back pressure valve for use with a wellhead assembly. The latch back pressure valve includes a body and at least one seal extending circumferentially around the body. A plurality of extendable latches are supported by the body and configured to engage with corresponding locking grooves. A poppet is configured to be displaced to open a passageway through the body. A hold-down ring is configured to engage a miming tool such that rotation of the miming tool causes the plurality of extendable latches to an extended position.
    Type: Application
    Filed: May 3, 2021
    Publication date: July 20, 2023
    Applicant: SPM Oil & Gas PC LLC
    Inventors: Ray Dicksang PANG, Phu DONG, Moises NAVA, Joshua Duane DOUGLAS