Patents by Inventor Per Ragnar Dahl

Per Ragnar Dahl 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).

  • Pig launcher
    Patent number: 8752229
    Abstract: An apparatus (10) for launching one or more pigs (5) for cleaning of production flow lines, or tubing, on the sea bed is shown. The apparatus includes a lifting frame (1) retaining a charging pipe (3) which is able to carry a train of pigs (51-510) resting stand-by in the charging pipe (3), a plurality of valves (V1-V4) which on the one side is in fluid communication with the charging pipe (3), and on the other side is in fluid communication with a high pressure drive fluid different from the production flow, a connecting means (2) for connecting of the apparatus (10) to a closable pipe sub leading to the production flow line to be pigged, and an actuatable piston (4) which is able to displace the train of pigs within the charging pipe (3).
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: June 17, 2014
    Assignee: Kongsberg Oil and Gas Technologies AS
    Inventors: Eirik Archer, Per Ragnar Dahl, Ulf Lønnemo
  • PIG LAUNCHER
    Publication number: 20130111680
    Abstract: An apparatus (10) for launching one or more pigs (5) for cleaning of production flow lines, or tubing, on the sea bed is shown. The apparatus includes a lifting frame (1) retaining a charging pipe (3) which is able to carry a train of pigs (51-510) resting stand-by in the charging pipe (3), a plurality of valves (V1-V4) which on the one side is in fluid communication with the charging pipe (3), and on the other side is in fluid communication with a high pressure drive fluid different from the production flow, a connecting means (2) for connecting of the apparatus (10) to a closable pipe sub leading to the production flow line to be pigged, and an actuatable piston (4) which is able to displace the train of pigs within the charging pipe (3).
    Type: Application
    Filed: May 16, 2011
    Publication date: May 9, 2013
    Applicant: APPLY NEMO AS
    Inventors: Eirik Archer, Per Ragnar Dahl, Ulf Lønnemo