Patents by Inventor Bernt Sigve Aadn.o slashed.y

Bernt Sigve Aadn.o slashed.y 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).

  • Downhole tool for pressure testing of oil and gas wells
    Patent number: 5655607
    Abstract: A downhole tool for pressure testing of oil and gas wells comprises a generally tubular main tool (1), which is provided with an internal passage (2) and is arranged for attachment at the lower end of a drill pipe string. The main tool (1) is on its outside provided with an inflatable packing element (10), which may be supplied with and relieved of inflating medium via an annular slide valve (5) arranged inside the main tool (1). The slide valve has two active positions, one on each side of a closing initial position, and the slide valve is brought to the active positions by an auxiliary tool (18) which may be run into the passage (2) of the main tool and attached releasably in the slide valve (5).
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: August 12, 1997
    Assignee: Smedvig Technology AS
    Inventors: Jone Mellemstrand, Bernt Sigve Aadn.o slashed.y, Svein ritsland, Jan Freyer