CASED WELL ELECTRICAL LOGGING DEVICE Russian patent published in 2019 - IPC G01V3/18 

FIELD: geophysics.

SUBSTANCE: invention relates to well geophysical survey and is intended for determination of specific electrical resistance of rocks through cased wells. Summary: cased well electrical logging device consists of electronic unit, centering devices, probe containing clamping devices, electrodes arranged in series along well axis. Current electrodes are arranged on centering devices. Measuring electrodes are installed with the possibility of elastic clamping to internal walls of the cased well by means of electrically insulated levers and clamping devices. Measuring electrodes are equipped with sealed drives with output shafts and electric contacts at output shafts and are made in the form of cutting or abrasive tools. Drives are installed in electrically insulated levers.

EFFECT: increased speed of logging due to considerable reduction of time for introduction of electrodes into column body, increased reliability and repairability due to simplified design, which works in aggressive well environment.

3 cl, 3 dwg