Patents by Inventor Samir Nazir

Samir Nazir 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).

  • Multi-cycle isolation valve and mechanical barrier
    Patent number: 8006772
    Abstract: A method for performing a wellbore-related activity may include positioning a sealing device along the wellbore; conveying a work string into the wellbore; using the work string to perform the activity; extracting the work string out of the wellbore; and shifting the sealing device to a closed position to seal a bore of the wellbore using a portion of the work string. A device that selectively seals or occludes a wellbore tubular may include a sealing device having a first and a second sealing element that seal a bore of the wellbore tubular. The first and second sealing elements may support a pressure applied in different directions. Pulling an engagement sleeve with the work string in an uphole direction may fold the first and second sealing elements into the closed position. The bore may be unsealed by applying a pressure cycle to shift the sealing device.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: August 30, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Samir Nazir, Alfredo Gomez
  • MULTI-CYCLE ISOLATION VALVE AND MECHANICAL BARRIER
    Publication number: 20090255685
    Abstract: A method for performing a wellbore-related activity may include positioning a sealing device along the wellbore; conveying a work string into the wellbore; using the work string to perform the activity; extracting the work string out of the wellbore; and shifting the sealing device to a closed position to seal a bore of the wellbore using a portion of the work string. A device that selectively seals or occludes a wellbore tubular may include a sealing device having a first and a second sealing element that seal a bore of the wellbore tubular. The first and second sealing elements may support a pressure applied in different directions. Pulling an engagement sleeve with the work string in an uphole direction may fold the first and second sealing elements into the closed position. The bore may be unsealed by applying a pressure cycle to shift the sealing device.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 15, 2009
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Samir Nazir, Alfredo Gomez