Patent ID: 9720127
Date: 2017-08-01
CPC Classifications: E21B,G01V

Claim:
1. A tubular wall geometry evaluation tool comprising: a housing having at least one probe arm extendable therefrom into contact with the inner wall of the tubular and an electromagnetic transducer associated with the probe arm and configured to provide an electrical output indicative of the extension distance of the probe arm from the housing; a first calibration transducer configured to output a signal representative of a full extension of a probe arm from the housing; a second calibration transducer associated with the housing and configured to output a signal representative of a full extension of a probe arm from the housing, the first and the second calibration transducers maintained sufficiently adjacent to the electromagnetic transducer associated with the probe arm to encounter the same temperature as that encountered by the electromagnetic transducer associated with the probe arm during use of the tool.