Patents by Inventor Everhard C. Blomsma

Everhard C. Blomsma 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).

  • Offshore production riser with flexible connector
    Patent number: 4273470
    Abstract: A central pipe riser support structure is connected to an underwater offshore base member by means of a gimbal joint. Vertical flow lines run parallel to the central riser and are supported by support means connected thereto. The lowermost support of each flow line is formed by a guide sleeve allowing at most a 3.degree. deviation between the central axis of the guide sleeve and the central axis of the flow line.
    Type: Grant
    Filed: January 16, 1979
    Date of Patent: June 16, 1981
    Assignee: Shell Oil Company
    Inventors: Everhard C. Blomsma, Paulus T. M. Holtslag
  • Marine structure and method of drilling a hole by means of said structure
    Patent number: 4134461
    Abstract: A bottom-positioned well drilling platform is provided with an enclosure in the lower part thereof which forms a chamber into which returning drilling mud and cuttings can be discharged. A pump and separate return line raise the mud alone from the chamber to the top of the platform while the cuttings remain in the chamber.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: January 16, 1979
    Assignee: Shell Oil Company
    Inventor: Everhard C. Blomsma
  • Pressure-compensated dual marine riser
    Patent number: 4059148
    Abstract: A dual marine riser for use in drilling deepwater oil and gas wells from a floating vessel, the marine riser incorporating concentric inner and outer risers, the outer riser being provided with one or more remotely-actuatable valves adapted to bring the annular space between the risers into communication with surrounding sea water in order to equalize pressures over the wall of the outer riser when the inner riser has been installed.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: November 22, 1977
    Assignee: Shell Oil Company
    Inventor: Everhard C. Blomsma