Patents by Inventor Shantur S. Tapar

Shantur S. Tapar 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).

  • Method and apparatus for centralizing through tubing milling assemblies
    Patent number: 7559371
    Abstract: A through tubing centralizer is delivered below the tubing and expanded against a surrounding tubular for fixation. In a window milling through tubing application, a whipstock is delivered through tubing and anchored. One or more centralizers are then delivered through tubing and expanded so that their inside diameter when set exceeds their outside diameter during run in. They are placed below the tubing and above the whipstock to help a through tubing mill stay on the whipstock ramp while milling the window. After the window is started, the centralizer can be expanded fully against the surrounding tubular to allow subsequent removal of the whipstock. Optionally, the centralizer can be collapsed for removal through tubing.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: July 14, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Gerald D. Lynde, Shantur S. Tapar, Steve Rosenblatt
  • Method and apparatus for centralizing through tubing milling assemblies
    Publication number: 20080115972
    Abstract: A through tubing centralizer is delivered below the tubing and expanded against a surrounding tubular for fixation. In a window milling through tubing application, a whipstock is delivered through tubing and anchored. One or more centralizers are then delivered through tubing and expanded so that their inside diameter when set exceeds their outside diameter during run in. They are placed below the tubing and above the whipstock to help a through tubing mill stay on the whipstock ramp while milling the window. After the window is started, the centralizer can be expanded fully against the surrounding tubular to allow subsequent removal of the whipstock. Optionally, the centralizer can be collapsed for removal through tubing.
    Type: Application
    Filed: November 21, 2006
    Publication date: May 22, 2008
    Inventors: Gerald D. Lynde, Shantur S. Tapar, Steve Rosenblatt