Patents by Inventor Philip T. Thayer

Philip T. Thayer 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).

  • Surface located isotope tracer injection apparatus
    Patent number: 5049743
    Abstract: The present disclosure is directed to a method and apparatus for controllably injection a radioactive isotope tracer fluid into a fracture fluid, a manifold or mud flow line connected to a well. It is best used in measuring well stimulation procedures based on injection of tracer isotopes so that stimulation performance data can be obtained by gamma ray spectroscopic measuring instruments lowered in the well borehole after fracture. The present apparatus utilizes a tank supply of tracer fluid connected through a pump into the mud line wherein the pump drives a tachometer, and utilizes a CPU to respond to pumping rate measurements and adjust the pumped rate of the tracer fluid.
    Type: Grant
    Filed: January 17, 1990
    Date of Patent: September 17, 1991
    Assignee: ProTechnics International, Inc.
    Inventors: Lawrence Taylor, III, John W. Chisholm, Philip T. Thayer