RETRIEVABLE DOWNHOLE RESISTIVITY METER MODULE Russian patent published in 2024 - IPC G01V3/28 E21B49/00 

FIELD: measuring; mining.

SUBSTANCE: invention relates to geophysical surveys in wells, namely to electromagnetic logging instruments during drilling. Retrievable module of the downhole resistivity meter contains a housing in the form of a sealed electrically transparent container built into the pipe string along the longitudinal axis, radiating and receiving generator coils and a measuring system. Container is equipped with a damper unit in the form of a metal bushing with a rubber damper ring at the upper end face and an additional bushing at the lower end face. Generator coils are arranged on the outer surface of the container. Measuring system is installed inside the container. Container is installed in power tube with radiotransparent inserts on through slots, which coincide with locations of generator coils.

EFFECT: possibility of operation of the extracted module of the borehole resistivity meter in wells with high difference of internal and annular pressure up to 45 MPa, increase of reliability and maintainability of its design and design of power tube, in which it is installed.

1 cl, 3 dwg