Patents by Inventor Richard C. Haas

Richard C. Haas 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 and apparatus for drilling wells
    Patent number: 5101913
    Abstract: Method and apparatus for drilling wells in which the annulus between the casing and drill string is sealed below the kelly and blowout preventers and drilling fluid returns are conducted from below the seal to the exterior through the drilling head. The annulus may be controlled below the seal to permit lubricating the seal through the blowout preventers while maintaining the well under complete control. A surface controlled subsurface valve may control drilling fluid returns.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: April 7, 1992
    Inventors: Charles O. Stockley, Richard C. Haas
  • Drilling method
    Patent number: 5010966
    Abstract: A method of receiving returns from a well being drilled in which the hydrostatic pressure of the drilling fluid cannot contain the formation pressure and controlling the flow and pressure of the returns and separating the oil, gas, and drilling fluids on the surface and returning the drilling fluids to the well while disposing of the oil and gas.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: April 30, 1991
    Assignee: Chalkbus, Inc.
    Inventors: Charles O. Stokley, Richard C. Haas