Patents by Inventor Michael J. Engel

Michael J. Engel 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).

  • Thickened viscoelastic fluids and uses thereof
    Patent number: 9341052
    Abstract: The present invention generally relates to a viscoelastic fluids, thickened acid compositions and the like and to methods of using said gelled compositions. The thickened compositions of the present invention can usefully be employed in methods of stimulating and/or modifying the permeability of underground formations, in drilling fluids, completion fluids, workover fluids, acidizing fluids, fracturing, gravel packing and the like.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: May 17, 2016
    Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
    Inventors: James F. Gadberry, Michael J. Engel, John Douglas Nowak, Jian Zhou, Xiaoyu Wang
  • Thickened viscoelastic fluids and uses thereof
    Publication number: 20140076572
    Abstract: The present invention generally relates to a viscoelastic fluids, thickened acid compositions and the like and to methods of using said gelled compositions. The thickened compositions of the present invention can usefully be employed in methods of stimulating and/or modifying the permeability of underground formations, in drilling fluids, completion fluids, workover fluids, acidizing fluids, fracturing, gravel packing and the like.
    Type: Application
    Filed: May 21, 2012
    Publication date: March 20, 2014
    Applicant: Akzo Nobel Chemicals International B.V.
    Inventors: James F. Gadberry, Michael J. Engel, John Douglas Nowak, Jian Zhou, Xiaoyu Wang
  • Removal of sulfur from aqueous suspension using filtration
    Patent number: 4631068
    Abstract: There is disclosed a process for the removal of sulfur from an aqueous sulfur-containing suspension through sulfur coalescence. Sulfur coalescence is initiated by passing the aqueous sulfur-containing suspension through a multi-passage filtering media. In one embodiment of the present invention, the aqueous sulfur-containing suspension is passed through a filtering media comprised of randomly oriented fibrous filter material. In another embodiment of the present invention, the aqueous sulfur containing suspension is passed through sintered metal filters. Optionally, downstream polishing, or filtration, steps using either the above enumerated filters or combinations of the above filters can also be used.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: December 23, 1986
    Assignee: Stauffer Chemical Company
    Inventors: Roy A. Baker, Rocky C. Costello, Michael J. Engel