Patents Examined by Wlliam Neuder
  • Drilling tool with non-rotating sleeve
    Patent number: 6840336
    Abstract: The invention refers to a drilling tool and method that, among other aspects, provides for a sleeve with expansible pads for positioning the drilling tool in the desired direction during drilling. The pads are hydraulically expanded and retracted by a valve system which selectively diverts mud flowing through the tool to the desired pads. The tool may also be provided with a flexible tube connecting the sleeve to drilling tool for maneuvering along deviations or curves in the wellbore.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: January 11, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Stuart Schaaf, Alain Dorel, Albert E. Patterson, II