Patents by Inventor Jon G. Gjedebo

Jon G. Gjedebo 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).

  • Riser tensioning arrangement
    Patent number: 6835026
    Abstract: An arrangement for transferring loads by means of one or more hydraulic cylinder-like actuators (19, 26, 40) in order to establish and maintain tension in a riser (1) of the type typically used in offshore petroleum production, where the riser (1) constitutes a connection between the sea bed (2) and an installation (4) on or near the surface of the sea (6), and where the required pressure difference between the pressure side(s) (18, 42) and the depressurised side(s) (17, 46) of the actuator(s) (19, 29, 40) is constituted by a hydrostatic pressure difference.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: December 28, 2004
    Assignee: National Oilwell Norway AS
    Inventor: Jon G. Gjedebo
  • Riser tensioning arrangement
    Publication number: 20040146363
    Abstract: An arrangement for transferring loads by means of one or more hydraulic cylinder-like actuators (19, 26, 40) in order to establish and maintain tension in a riser (1) of the type typically used in offshore petroleum production, where the riser (1) constitutes a connection between the sea bed (2) and an installation (4) on or near the surface of the sea (6), and where the required pressure difference between the pressure side(s) (18, 42) and the depressurised side(s) (17, 46) of the actuator(s) (19, 29, 40) is constituted by a hydrostatic pressure difference.
    Type: Application
    Filed: March 29, 2004
    Publication date: July 29, 2004
    Inventor: Jon G. Gjedebo
  • Method of drilling sub-sea oil and gas production wells
    Patent number: 6745857
    Abstract: A method of drilling sub-sea oil and gas production wells in which a liquid hydrocarbon substance, such as a natural gas liquid, is injected into the drilling mud supplied to the well in order to reduce the mud density. The method of the present invention enables reduction and control of the hydraulic pressure of the drilling mud while drilling production wells in deep water, thereby to require fewer casing runs which eventually yields better oil productivity.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: June 8, 2004
    Assignee: National Oilwell Norway AS
    Inventor: Jon G. Gjedebo
  • Method or drilling sub-sea oil and gas production wells
    Publication number: 20030062199
    Abstract: A method of drilling sub-sea oil and gas production wells in which a liquid hydrocarbon substance, such as a natural gas liquid, is injected into the drilling mud supplied to the well in order to reduce the mud density. The method of the present invention enables reduction and control of the hydraulic pressure of the drilling mud while drilling production wells in deep water, thereby to require fewer casing runs which eventually yields better oil productivity.
    Type: Application
    Filed: September 19, 2002
    Publication date: April 3, 2003
    Inventor: Jon G. Gjedebo