Apparatus for measuring the deformation and stress condition of

Details Apparatus for measuring the deformation and stress condition of Apparatus for measuring the deformation and stress condition of

1980-02-11

1982-05-11

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

E21B 4700

Patent

active

043287042

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.

REFERENCES:
patent: 2183078 (1939-12-01), Kemler
patent: 3115774 (1963-12-01), Kolb
patent: 3968473 (1976-07-01), Patton et al.
patent: 3974690 (1976-08-01), Brock, Jr. et al.
patent: 4136327 (1979-01-01), Flanders et al.
patent: 4202490 (1980-05-01), Gunkel et al.

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