Patents by Inventor Kristian Harestad

Kristian Harestad 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).

  • Power Lift Generator
    Publication number: 20100059222
    Abstract: The present invention relates to device for increasing the production flow in a production tubing, comprising at least one inlet for adding a fluid medium and means to provide the added fluid at an angle ? between 90 and zero degrees with a longitudinal axis of the tubing. This effect is further enhanced by means for rotating the added fluid medium. A method for increasing the production flow in a production tubing is also disclosed.
    Type: Application
    Filed: March 28, 2008
    Publication date: March 11, 2010
    Applicant: PETROLEUM TECHNOLOGY COMPANY AS
    Inventors: Magnar Tveiten, David Hutchinson, Egil Josefsen, Kristian Harestad
  • Well barrier
    Patent number: 5667015
    Abstract: A well barrier for separating two liquids in a gas or oil well. The well barrier includes opposing sets of laths which project slantingly away from a centrally positioned fixing device. A set of upper and lower canvas materials may be affixed to each of the sets of laths to provide enhanced sealing effect. Preferably, the laths are also positioned in an overlapping relationship to thereby minimize the overall length of the well barrier while also maintaining the required functionality.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: September 16, 1997
    Assignee: BJ Services Company
    Inventors: Kristian Harestad, Thor-Peter Herigstad