Patents by Inventor James Michael Costley

James Michael Costley 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).

  • Downhole machining of well completion equipment
    Patent number: 6439313
    Abstract: A method of machining a workpiece in a subterranean wellbore comprises the steps of: (a) providing a workpiece that comprises (1) a first section that comprises a first material, and (2) a second section that comprises a second material, the second section forming at least one surface of the workpiece; (b) placing the workpiece in a subterranean wellbore that is surrounded by a geologic formation; and (c) machining the workpiece to remove at least part of the second material in the second section, whereby at least one surface of the workpiece is formed into a desired configuration. This method allows, for example, a landing nipple to be installed in a wellbore, and customized locking recesses to be formed in the inner surface of the nipple at a later time.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: August 27, 2002
    Assignee: Schlumberger Technology Corporation
    Inventors: Hubertus V. Thomeer, James Michael Costley, Randolph J. Sheffield, David M. Eslinger, Marc Allcorn, Mark C. Oettli