Patents by Inventor Rogen Sverre Stave

Rogen Sverre Stave 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).

  • BOOST SYSTEM AND METHOD FOR DUAL GRADIENT DRILLING
    Publication number: 20150008036
    Abstract: Boost system and method for dual gradient drilling where a marine riser (1) has a mud return line (14) connected at a first connection position (18) below the lowest foreseeable mud level (12) in the marine riser (1), and where a mud return pump (16) is connected to the mud return line (14), and where a recirculation line (20) that has a recirculation pump (22), is connected to the marine riser (1) at a second connection position (24) below the lowest foreseeable mud level (12) in the marine riser (1), and at a third connection position (26) on the marine riser (1) below said second connection position (24).
    Type: Application
    Filed: January 16, 2013
    Publication date: January 8, 2015
    Applicant: AGR SUBSEA AS
    Inventors: Sigurd Ree, Rogen Sverre Stave