Patents by Inventor Charlie R. Mauldin

Charlie R. Mauldin 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).

  • Electropolishing method for oil field tubular goods and drill pipe
    Patent number: 6523615
    Abstract: A method of producing fluids from a well bore by polishing the inside diameter surface of a down-hole tubular. The method includes the steps of providing a down-hole tubular having an inside diameter and being made of a carbon steel alloy or a high chromium alloy, preparing an inside diameter surface of the down-hole tubular, subjecting the inside diameter surface to an electropolishing treatment to produce a smooth surface being slick and essentially non-stick, locating the down-hole tubular within the well bore adjacent a fluid-producing formation, and producing the fluids through the inside diameter of the down-hole tubular. The electropolishing treatment can also be applied to the inside diameter surfaces of carbon steel drill pipe.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: February 25, 2003
    Assignee: John Gandy Corporation
    Inventors: John B. Gandy, Roger E. Ethridge, Charlie R. Mauldin
  • Electropolishing method for oil field tubular goods and drill pipe
    Publication number: 20010027867
    Abstract: A method of producing fluids from a well bore by polishing the inside diameter surface of a down-hole tubular. The method includes the steps of providing a down-hole tubular having an inside diameter and being made of a carbon steel alloy or a high chromium alloy, preparing an inside diameter surface of the down-hole tubular, subjecting the inside diameter surface to an electropolishing treatment to produce a smooth surface being slick and essentially non-stick, locating the down-hole tubular within the well bore adjacent a fluid-producing formation, and producing the fluids through the inside diameter of the down-hole tubular. The electropolishing treatment can also be applied to the inside diameter surfaces of carbon steel drill pipe.
    Type: Application
    Filed: March 28, 2001
    Publication date: October 11, 2001
    Inventors: John B. Gandy, Roger E. Ethridge, Charlie R. Mauldin