Research and production enterprise that creates special and unique methods and technologies for geophysical research of oil and gas, ore and coal wells

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MID-K-GK (MID-Gazprom) wireline magnetic-pulse defectoscope and thickness measuring tool

is designed to control technical condition of tubing, casing pipes and well strainer by a complex of methods including defectoscope and thickness measuring tool, highly sensitive thermometer, gamma-ray logging and pressure sensor.

In most drilling wells MID-K-GK is used to control:

  • well construction having till 4 casings;
  • compliance to casing interval project with different diameter and wall thickness;
  • tail liner installation interval;
  • casing integrity and rate of wear during tool operation.

In the running wells MID-K-GK allows to define:

  • perforation intervals;
  • cut through failure position;
  • casing blowout in double casing string well program;
  • factual installation intervals of sealing patch;
  • factual installation depth of casing packer and etc.;
  • well construction till 4 casings;
  • corrosion intervals and casing rate of wear;
  • casing failure intervals, requiring repair;
  • first, second and third casing thickness.


Pipe maximum diameter, mm324
A single-pipe wall thickness measurement error, mm:
for single pipes 2.5”
for single pipes 5”

Through-tubing casing 5" wall thickness measurement error, mm0.7
Minimum length of a “crack”-type detectable defect along the pipe axis, mm:
for single pipes 2.5"
for single pipes 5"
for casing pipes 5" through-tubing measurement

Minimum length of a “transversal crack”-type detectable defect1/6 of the perimeter
Thermometer resolution, °С0.01
Thermometer time constant, sec0.5
Maximum operating temperature, °С120, 150, 175
Maximum operating pressure, MPa100 (110)
Downhole dimensions, mm:

Weight, kg9
Power consumption, Wup to 4
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