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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TzSP-GK-S-60/73/76/90* Digital gamma-ray spectral logging tool

is designed for natural radioactive element content quantitative measurements: thorium (Th), uranium (U) and potassium (K) in rocks while different wells surveying.

Features and advantages

  • interval-by-interval full gamma-ray spectra accumulation for further digital data telemetering;
  • improved accuracy while U, Th, K content determination;
  • analytical accounting of well design effect (diameter, casing, cement bond);
  • referenceless energy scale stabilization and calibration, gain control/


Content measurement range, %

Gamma-quantum energy range, MeV0.06÷3
Measurement basic relative error, %up to 5
Scintillation detector typeNaJ(Tl), CsI(Na), BGO
gamma-ray energy resolution (660 KeV), %up to 12/14/15
Energy channel number256
Power supply voltage, V50-75
Current consumption, mAup to 100
Maximum hydrostatic pressure, MPa60
Maximum operating temperature, °С120
Downhole tool dimensions, mm:

up to 1200
Weight, kgup to 8/10/15/20

The downhole tool contains registration and processing electronic module, telemetry system and scintillation detector with photoelectronic multiplier. The tool is provided with full software for Vulkan, Gektor recorder and interpretation software for openhole and cased borehole logging. The tool is to be run with one-core or three-core logging wireline

*The apparatus is certificated.

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