Patents by Inventor Tammy T. Bourgoyne

Tammy T. Bourgoyne 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 a borehole into a subsea abnormal pore pressure environment
    Patent number: 6138774
    Abstract: An apparatus for controlling a subsea borehole fluid pressure is proposed for use with a conductor casing positioned below the mudline and within a normal pore pressure environment. The apparatus includes a pump for moving a fluid through a tubular into a borehole. The fluid, before being pumped, exerts a pressure less than the pore pressure of an abnormal pore pressure environment. The fluid in the borehole is then pressurized by the pump to at least a borehole pressure equal to or greater than the pore pressure of an abnormal pore pressure environment. A pressure housing assembly allows for the drilling of a borehole below the conductor casing into an abnormal pore pressure environment while maintaining the pressurized fluid between a borehole pressure equal to or greater than the pore pressure of the abnormal pore pressure environment, and below the fracture pressure of the borehole in the abnormal pore pressure environment.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: October 31, 2000
    Assignee: Weatherford Holding U.S., Inc.
    Inventors: Adam T. Bourgoyne, Jr., Darryl A. Bourgoyne, Tammy T. Bourgoyne