Patents by Inventor Dennis Atchley

Dennis Atchley 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).

  • Apparatus and method for stimulating multiple production zones in a wellbore
    Patent number: 6006838
    Abstract: An apparatus and method for selectively stimulating a plurality of producing zones of an openhole wellbore in oil and gas wells in one trip. The assembly includes a plurality of modules connected in a tailpipe wherein the modules can be selectively actuated to conduct a matrix acidizing job and near wellbore erosion job on producing zones of interest in the wellbore. Each module includes a sleeve shiftable between a closed position and a treating position where a plurality of jet passageways are exposed to the central passageway of the assembly.
    Type: Grant
    Filed: October 12, 1998
    Date of Patent: December 28, 1999
    Assignee: BJ Services Company
    Inventors: T. G. Whiteley, Douglas J. Lehr, Michael A. Martin, Dennis Atchley