Patents by Inventor Per Fotland

Per Fotland 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).

  • Methods and apparatus for severing nested strings of tubulars
    Patent number: 7156170
    Abstract: An apparatus and method for use in severing casing as it is pulled from a wellbore. In one aspect, the apparatus, includes a clamping assembly, a drilling assembly and a cutting assembly. The apparatus is disposed at the end of a telescopic arm, with the components being remotely operated by personnel using a control panel. The apparatus is positioned adjacent casing and clamped thereto. Thereafter, the apparatus drills a hole completely through the casing for the insertion of a retention pin. The apparatus then severs the casing.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: January 2, 2007
    Inventors: Per Fotland, Tor Jan Akerlund
  • Methods and apparatus for severing nested strings of tubulars
    Publication number: 20050082063
    Abstract: An apparatus and method for use in severing casing as it is pulled from a wellbore. An apparatus is first provided, comprising a clamping assembly, a drilling assembly and a cutting assembly. In one aspect, the apparatus is disposed at the end of a telescopic arm, with the components being remotely operated by personnel using a control panel. The apparatus can be positioned adjacent casing and clamped thereto. Thereafter, the apparatus can drill a hole completely through the casing for the insertion of a retention pin. The apparatus can then severe the casing into manageable lengths to facilitate disposal, such as during a plugging and abandonment procedure.
    Type: Application
    Filed: December 7, 2004
    Publication date: April 21, 2005
    Inventors: Per Fotland, Tor Akerlund
  • Methods and apparatus for severing nested strings of tubulars
    Patent number: 6827145
    Abstract: An apparatus and method for use in severing casing as it is pulled from a wellbore. An apparatus is first provided, comprising a clamping assembly, a drilling assembly and a cutting assembly. In one aspect, the apparatus is disposed at the end of a telescopic arm, with the components being remotely operated by personnel using a control panel. The apparatus can be positioned adjacent casing and clamped thereto. Thereafter, the apparatus can drill a hole completely through the casing for the insertion of a retention pin. The apparatus can then severe the casing into manageable lengths to facilitate disposal, such as during a plugging and abandonment procedure.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: December 7, 2004
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Per Fotland, Tor Jan Akerlund
  • Methods and apparatus for severing nested strings of tubulars
    Publication number: 20030015322
    Abstract: The present invention provides an apparatus and method for severing casing as it is pulled from a wellbore. An apparatus is first provided, comprising a clamping assembly, a drilling assembly and a cutting assembly. In one aspect, the apparatus is disposed at the end of a telescopic arm, with the components being remotely operated by personnel using a control panel. The apparatus can be positioned adjacent casing and clamped thereto. Thereafter, the apparatus can drill a hole completely through the casing for the insertion of a retention pin. The apparatus can then severe the casing into manageable lengths to facilitate disposal, such as during a plugging and abandonment procedure.
    Type: Application
    Filed: March 19, 2002
    Publication date: January 23, 2003
    Applicant: Weatherford/Lamb, Inc.
    Inventors: Per Fotland, Tor Jan Akerlund
  • Method for the measurement of precipitation of asphaltene in oil
    Patent number: 5420040
    Abstract: The invention provides a method and an apparatus for measuring asphaltene precipitation in a petroleum product. The inventive method quantifies the precipitation by measuring changes in the petroleum product's conductivity or capacitance. The inventive apparatus comprises a measuring cell adapted to be filled with a petroleum product or a solution of the product and a flocculant, together with an instrument electrically coupled to the measuring cell for measuring the product's or solution's conductivity or capacitance.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: May 30, 1995
    Assignee: Norsk Hydro a.s.
    Inventors: Hilde Anfindsen, Finn Hallstein Fadnes, Per Fotland