Patents by Inventor Einar Kristiansen

Einar Kristiansen 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).

  • Casing with isolated annular space
    Patent number: 7303016
    Abstract: The invention is comprised of (see FIG. 1) an inner pipe (2), and an outer pipe (3), and two end subs (1). An isolated circular hollowed space is contained in between these components. The isolated space can be used for transport of different medias down into the well, this can be vacuum, air, gas, acids, solids, tracers, or other well stimulating medias. The end subs (1) can be connected to the casing in the well and become an integrated part of the casing. The invention can be cemented on the outside like the casing can. The invention can be perforated after installed in the well.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: December 4, 2007
    Inventor: Einar Kristiansen
  • Casing with isolated annular space
    Publication number: 20060048935
    Abstract: The invention is comprised of (see FIG. 1) an inner pipe (2), and an outer pipe (3), and two end subs (1). An isolated circular hollowed space is contained in between these components. The isolated space can be used for transport of different medias down into the well, this can be vacuum, air, gas, acids, solids, tracers, or other well stimulating medias. The end subs (1) can be connected to the casing in the well and become an integrated part of the casing. The invention can be cemented on the outside like the casing can. The invention can be perforated after installed in the well.
    Type: Application
    Filed: December 15, 2003
    Publication date: March 9, 2006
    Inventor: Einar Kristiansen