Patents by Inventor Cecilie T. Misiewicz

Cecilie T. Misiewicz 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).

  • Mud flow back valve
    Patent number: 6976542
    Abstract: A valve for downhole use allows flow of mud or completion fluids but closes when subjected to produced hydrocarbons. The flow through the valve is through an annular passage that features a sleeve preferably made of rubber. The passage remains open during completion operations, but when hydrocarbons are produced the rubber swells and the passage is closed off. Applications include completions involving long horizontal runs and small inside diameter laterals where access to a sliding sleeve with coiled tubing or a wireline run tool is not practical.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: December 20, 2005
    Assignee: Baker Hughes Incorporated
    Inventors: Knut H. Henriksen, Cecilie T. Misiewicz
  • Mud flow back valve
    Patent number: RE45641
    Abstract: A valve for downhole use allows flow of mud or completion fluids but closes when subjected to produced hydrocarbons. The flow through the valve is through an annular passage that features a sleeve preferably made of rubber. The passage remains open during completion operations, but when hydrocarbons are produced the rubber swells and the passage is closed off. Applications include completions involving long horizontal runs and small inside diameter laterals where access to a sliding sleeve with coiled tubing or a wireline run tool is not practical.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: August 4, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Knut H. Henriksen, Cecilie T. Misiewicz