Patents by Inventor Jay P. Simpson

Jay P. Simpson 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).

  • Fast drilling invert emulsion drilling fluids
    Patent number: 4508628
    Abstract: Disclosed are invert oil emulsion drilling fluids containing a non-toxic, biodegradable oil having a viscosity at 25.degree. C. of less than 1.5 centipoise, a flash point of at least 60.degree. C., an aniline point of at least 80.degree. C., and a content of aromatic hydrocarbons of less than 1% by volume. These drilling fluids have a low viscosity at the high shear rates imparted to a drilling fluid at the bit during drilling. This low bit viscosity provides for faster penetration rates. Such drilling fluids containing a temperature stabilizing additive exhibit superior thermal stability.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: April 2, 1985
    Assignee: O'Brien-Goins-Simpson & Associates
    Inventors: Thad O. Walker, Jay P. Simpson, Harry L. Dearing