Patents by Inventor Geroge Telfer

Geroge Telfer 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).

  • Tool and method for removing excess cement from the top of a liner after hanging and cementing thereof
    Patent number: 6408945
    Abstract: A tool (100) for removing excess cement from the top of a liner (51) after hanging and cementing thereof by inner string comprises a hollow mandrel (4), a valve sleeve (7) and a port (12) in said hollow mandrel (4) wherein said valve sleeve (7) is movable to open and close said port (122) to allow circulating fluid to be introduced into the liner (51) or casing in the vicinity of the liner hanger (54) supporting the liner. The circulating fluid washes the excess cement away and a non rotating casing scraper can obviate the need for a separate trip to clean the inside of the casing.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: June 25, 2002
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Geroge Telfer