Patents by Inventor Deitmar J. Neidhardt

Deitmar J. Neidhardt 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 detecting defects in oilfield tubulars
    Patent number: 7698937
    Abstract: A sensor system for detecting defects in a tubular string while positioned in the well includes a sensor tool (10) comprising a plurality of circumferentially spaced sensors (40) arranged in two or more axially spaced rows. A plurality of sensors are positioned in each row, with each sensor positioned on one of a plurality of sensor support pads. Sensors within a row may include sensors with axes inclined at different angles, and each of the plurality of sensor pads may move from a radially retracted run-in position to a radially extended sensing position. A flexible line (50) may be used for lowering a sensor tool in the well and retrieving the sensor tool from the well.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: April 20, 2010
    Inventor: Deitmar J. Neidhardt
  • Method and apparatus for detecting defects in oilfield tubulars
    Publication number: 20090101337
    Abstract: A sensor system for detecting defects in a tubular string while positioned in the well includes a sensor tool (10) comprising a plurality of circumferentially spaced sensors (40) arranged in two or more axially spaced rows. A plurality of sensors are positioned in each row, with each sensor positioned on one of a plurality of sensor support pads. Sensors within a row may include sensors with axes inclined at different angles, and each of the plurality of sensor pads may move from a radially retracted run-in position to a radially extended sensing position. A flexible line (50) may be used for lowering a sensor tool in the well and retrieving the sensor tool from the well.
    Type: Application
    Filed: October 18, 2007
    Publication date: April 23, 2009
    Inventor: Deitmar J. Neidhardt