Patents by Inventor Duncan Alexander HARPER

Duncan Alexander HARPER 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).

  • SCREEN APPARATUS AND METHOD
    Publication number: 20220220832
    Abstract: A downhole expandable apparatus for restricting ingress of solids in a wellbore comprises a base pipe, a fluid permeable expandable foam material mounted on the base pipe configurable between a non-expanded and an expanded configuration, and a retractable sleeve. The retractable sleeve is moveable between a first configuration in which the retractable sleeve retains the expandable foam material in the non-expanded configuration, and a second configuration in which the retractable sleeve is retracted to provide a free portion of the expandable foam material. The expandable foam material is permitted to radially expand towards the expanded configuration and into engagement with a surface in the wellbore.
    Type: Application
    Filed: August 12, 2020
    Publication date: July 14, 2022
    Applicant: Swellfix UK Limited
    Inventors: Eilidh Jean MCKAY, Duncan Alexander HARPER