Patents by Inventor William D. McCain

William D. McCain 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).

  • Method for reducing permeability restriction near wellbore
    Patent number: 6945327
    Abstract: Method is provided for increasing the productivity of gas wells producing from reservoirs where retrograde condensation occurs around the wells. An oil-wetting surfactant is injected in a solvent to oil wet the formation for a selected distance around a well or a hydraulic fracture intersecting the well. A pre-flush liquid, such as carbon dioxide, alcohol or similar products and mixtures thereof, may be used to reduce water saturation before injection of the surfactant. The method may also be applied to increase the productivity of oil wells producing from reservoirs where breakout of solution gas occurs near the well.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: September 20, 2005
    Assignee: Ely & Associates, Inc.
    Inventors: John W. Ely, Bradley C. Wolters, William D. McCain
  • Method for reducing permeability restriction near wellbore
    Publication number: 20040157749
    Abstract: Method is provided for increasing the productivity of gas wells producing from reservoirs where retrograde condensation occurs around the wells. An oil-wetting surfactant is injected in a solvent to oil wet the formation for a selected distance around a well or a hydraulic fracture intersecting the well. A pre-flush liquid, such as carbon dioxide, alcohol or similar products and mixtures thereof, may be used to reduce water saturation before injection of the surfactant. The method may also be applied to increase the productivity of oil wells producing from reservoirs where breakout of solution gas occurs near the well.
    Type: Application
    Filed: February 11, 2003
    Publication date: August 12, 2004
    Inventors: John W. Ely, Bradley C. Wolters, William D. McCain