Patents by Inventor David Epplin

David Epplin 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).

  • Gyroscopic Steering Tool Using Only a Two-Axis Rate Gyroscope and Deriving the Missing Third Axis
    Publication number: 20070175055
    Abstract: A two-axis gyroscope used on a bottom hole assembly can be used for determining a rate of rotation about the rotational axis of a BHA. The method takes advantage of possible misalignment of at least one axis of the two axis gyroscope from orthogonality with respect to the rotational axis of the BHA, resulting in the misaligned gyro being sensitive to BHA rotation.
    Type: Application
    Filed: April 12, 2007
    Publication date: August 2, 2007
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Robert Estes, Jonathan Bynum, Randell Riggs, David Epplin
  • Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis
    Publication number: 20050056461
    Abstract: A two-axis gyroscope used on a bottom hole assembly can be used for determining a rate of rotation about the rotational axis of a BHA. The method takes advantage of possible misalignment of at least one axis of the two axis gyroscope from orthogonality with respect to the rotational axis of the BHA, resulting in the misaligned gyro being sensitive to BHA rotation.
    Type: Application
    Filed: August 5, 2004
    Publication date: March 17, 2005
    Applicant: Baker Hughes Incorporated
    Inventors: Robert Estes, Jonathan Bynum, Randell Riggs, David Epplin