Patents by Inventor Knud Lunde

Knud Lunde 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).

  • Deadleg
    Patent number: 9297237
    Abstract: An essentially cylindrical deadleg having a first cross sectional area at one end of the deadleg and a second cross sectional area, the first cross sectional area being smaller than the second cross sectional area.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: March 29, 2016
    Assignee: STATOIL PETROLEUM AS
    Inventors: Knud Lunde, Keijo Kinnari, Catherine Labes-Carrier
  • Method of inhibiting hydrate formation
    Patent number: 8220552
    Abstract: The present invention provides a method of inhibiting formation of solid hydrates in a conduit used to contain a flowing, water-containing hydrocarbon, which method comprises introducing into said hydrocarbon in said conduit a gas which raises the pressure threshold for hydrate formation for said water-containing hydrocarbon, said gas being introduced in a manner which causes it to travel along at least part of said conduit in the direction of hydrocarbon flow.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: July 17, 2012
    Assignee: Statoil ASA
    Inventors: Keijo J. Kinnari, Catherine Labes-Carrier, Knud Lunde, Leif Aaberge
  • Method for protecting hydrocarbon conduits
    Patent number: 8191646
    Abstract: A method of protecting a hydrocarbon conduit during a period of reduced hydrocarbon flow is disclosed, where nitrogen is introduced into the conduit at a pressure of 1 to 350 bar g and at a rate of (1.5 to 35)A kg/sec (where A is the internal cross sectional area of the conduit in square meters) for a period of t hours where t=(p×d)/n where d is the length in km of the conduit from the nitrogen introduction location and n is 10 to 400.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: June 5, 2012
    Assignee: Statoil ASA
    Inventors: Keijo J. Kinnari, Catherine Labes-Carrier, Knud Lunde, Leif Aaberge
  • DEADLEG
    Publication number: 20120090686
    Abstract: An essentially cylindrical deadleg having a first cross sectional area at one end of the deadleg and a second cross sectional area, the first cross sectional area being smaller than the second cross sectional area.
    Type: Application
    Filed: September 23, 2008
    Publication date: April 19, 2012
    Applicant: STATOILHYDRO ASA
    Inventors: Knud Lunde, Keijo Kinnari, Catherine Labes-Carrier
  • Method for Protecting Hydrocarbon Conduits
    Publication number: 20090321082
    Abstract: The invention provides a method of protecting a hydrocarbon conduit during a period of reduced hydrocarbon flow, said method comprising introducing nitrogen into said conduit during a said period at a pressure p of 1 to 350 bar g and at a rate of (1.5 to 35). A kg/sec (where A is the internal cross sectional area of the conduit in square metres) for a period of t hours where t=p.d/n where d is the length in km of the conduit from the nitrogen introduction location and n is 10 to 400.
    Type: Application
    Filed: March 14, 2007
    Publication date: December 31, 2009
    Applicant: Statoilhydro ASA
    Inventors: Keijo J. Kinnari, Catherine Labes-Carrier, Knud Lunde, Leif Aaberge
  • Method of Inhibiting Hydrate Formation
    Publication number: 20080053659
    Abstract: The present invention provides a method of inhibiting formation of solid hydrates in a conduit used to contain a flowing, water-containing hydrocarbon, which method comprises introducing into said hydrocarbon in said conduit a gas which raises the pressure threshold for hydrate formation for said water-containing hydrocarbon, said gas being introduced in a manner which causes it to travel along at least part of said conduit in the direction of hydrocarbon flow.
    Type: Application
    Filed: September 9, 2005
    Publication date: March 6, 2008
    Applicant: STATOIL ASA
    Inventors: Keijo Kinnari, Catherine Labes-Carrier, Knud Lunde, Leif Aaberge