Patents by Inventor Svein Ove AANESLAND

Svein Ove AANESLAND 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).

  • Dual gradient drilling system
    Patent number: 9249637
    Abstract: A dual gradient drilling system comprises a primary riser that is coupled to a drilling rig and a subsea wellhead and an auxiliary riser that is coupled to the drilling rig and to the primary riser by a fluid conduit that is disposed at a point between the drilling rig and the wellhead. The fluid conduit provides fluid communication between the primary riser and the auxiliary riser. A pump system is disposed within the auxiliary riser and is in fluid communication with the fluid conduit. A drive string is disposed within the auxiliary riser and is coupled to the pump system so as to operably couple the pump system to the drilling rig.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: February 2, 2016
    Assignee: National Oilwell Varco, L.P.
    Inventors: Frank B. Springett, Svein Ove Aanesland, Geoffrey Alexander Pickett
  • DUAL GRADIENT DRILLING SYSTEM
    Publication number: 20140102789
    Abstract: A dual gradient drilling system comprises a primary riser that is coupled to a drilling rig and a subsea wellhead and an auxiliary riser that is coupled to the drilling rig and to the primary riser by a fluid conduit that is disposed at a point between the drilling rig and the wellhead. The fluid conduit provides fluid communication between the primary riser and the auxiliary riser. A pump system is disposed within the auxiliary riser and is in fluid communication with the fluid conduit. A drive string is disposed within the auxiliary riser and is coupled to the pump system so as to operably couple the pump system to the drilling rig.
    Type: Application
    Filed: October 15, 2013
    Publication date: April 17, 2014
    Applicant: National Oilwell Varco, L.P.
    Inventors: Frank B. SPRINGETT, Svein Ove AANESLAND, Geoffrey Alexander PICKETT