Patents by Inventor Lawrence A. Pyatt

Lawrence A. Pyatt 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 of distinguishing material characteristics in a well bore for controlling photograph taking in the well bore
    Patent number: 4704579
    Abstract: A combination of magnetics and a special geometric environment is employed to distinguish whether an instrument is positioned within a pipe formed of magnetizable or non-magnetizable material, and is the basis, in part, for a method and an apparatus used in controlling picture taking at the bottom of a well bore. A coil is energized repetitively in a circuit in which the voltage across the coil, or the current that flows through the coil, can be measured. Whether the coil is in a magnetic or non-magnetic environment is determined by the magnitude of the change in coil voltage or current.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: November 3, 1987
    Inventors: Lawrence A. Pyatt, Robert W. Thompson
  • Bore hole direction measuring instrument control
    Patent number: 4527122
    Abstract: A combination of magnetics and a special geometric environment is employed to distinguish whether an instrument is positioned within a pipe formed of magnetizable or non-magnetizable material, and is the basis, in part, for a method and an apparatus used in controlling picture taking at the bottom of a well bore. A coil is energized repetitively in a circuit in which the voltage across the coil, or the current that flows through the coil, can be measured. Whether the coil is in a magnetic or non-magnetic environment is determined by the magnitude of the change in coil voltage or current.
    Type: Grant
    Filed: June 11, 1982
    Date of Patent: July 2, 1985
    Inventors: Lawrence A. Pyatt, Robert W. Thompson
  • Identification of pipe material in wells
    Patent number: 4365197
    Abstract: A combination of magnetics and a special geometric environment is employed to distinguish whether an instrument is positioned within a pipe formed of magnetizable or non-magnetizable material, and is the basis, in part, for a method and an apparatus used in controlling picture taking at the bottom of a well bore. A coil is energized repetitively in a circuit in which the voltage across the coil, or the current that flows through the coil, can be measured. Whether the coil is in a magnetic or non-magnetic environment is determined by the magnitude of the change in coil voltage or current.
    Type: Grant
    Filed: February 6, 1980
    Date of Patent: December 21, 1982
    Inventors: Lawrence A. Pyatt, Robert W. Thompson