Patents by Inventor Magne P. Nilsen

Magne P. Nilsen 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).

  • Cementing apparatus and method for execution of cementing operation
    Patent number: 4858692
    Abstract: Cementing apparatus to be used for well cementing operations comprisingan intermediate casing (10) which features one or several cementing ports (12),a main tool (21) with one or several cementing channels (22) located with their outlets aligned with the cementing ports (12),a main sealing sleeve (13) and an auxiliary sleeve (17) that features one or several port openings (15, 19),the main sealing and pilot sleeves (13, 17) as a unit in an initial lower position closing the connection between the cementing channels (22) and the cementing ports (12), and forming the said connection in a second vertically shifted position through the port openings (15, 19). A procedure for execution of a cementing operation.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: August 22, 1989
    Assignee: Den norske stats oljeselskap a.s
    Inventor: Magne P. Nilsen