Patents by Inventor Juan C. Kristiansen

Juan C. 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).

  • Patent number: 4595052
    Abstract: A reperforable bridge plug fastenable to a tool through a weak point and integrated by an elastic gasket between support and compression pieces has a dentated fastener for fastening to a tube line, a bridge plug having a tubular body with upper and lower ends, an enlarged diameter hollow portion on the lower end portion of the bridge plug forming a chamber, a plurality of slots through the wall of the chamber so that it communicates with the exterior of the bridge plug body, a plurality of calibrated rings formed by enlargements of the exterior surface of the wall calibrated to fit the well diameter in which the bridge plug is to be applied, an interchangeable converter plug mounted in the end of the tubular body adjacent the enlarged portion between the chamber and tubular body, a lower compression piece located below the elastic gasket and fastened to the tubular body by a fuse pin and having an external frusto conical surface thereon, a frusto conical surface on the exterior of the enlarged diameter portio
    Type: Grant
    Filed: March 13, 1984
    Date of Patent: June 17, 1986
    Assignee: Metalurgica Industrial Mecanica S.A.
    Inventor: Juan C. Kristiansen