Apparatus for measuring the deformation and stress condition of the string of casing of drilled oil wells
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United States of America Patent
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May 11, 1982
Grant Date -
N/A
app pub date -
Feb 11, 1980
filing date -
Feb 11, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for the in situ measurement of the deformation and stress conditions of a string of casings in a drilled oil well is provided with an antimagnetic measuring section mountable in the string of casings at a selected depth and having extensometers fixed on the mantle thereof and a first electronic unit. The unit includes printed circuitry mounted on the measuring section and receptive of the signals from the extensometers for transmitting same. The apparatus also includes a drill hole probe extendable into the interior of the casings to the depth of the measuring section and a second electronic circuit receptive of the transmission from the first electronic circuit to apply same to a cable attached thereto for processing at the surface.
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