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Integral gamma-ray logging tool GK

ГК The tool has the following modifications by max operating temperature T max and upper value of borehole hydrostatic pressure Pmax :
 by temperature: 120, 150, 175, 200 °С,
 by pressure: 80, 100, 120, 140 МPа.
Designed to measure exposure rate (ER) of rocks natural gamma radiation and (or)uranium equivalent mass fraction (Ue).
Used for logging of open oil and gas holes filled with any mud; the tool operates with a three-conductor carrying logging cable up to 7000m long and log recorders that provide for command transfer and data receipt in “Manchester-2” code.

 well sections and lithological changes correlation;
 detailed lithological identification;
 clayiness evaluation;
 rocks mineral composition identification/refinement;
 radiogeochemical anomalies location.

Measured parameters Range Error
ER of rocks natural gamma radiation 0÷250 μR/h ±15 %
Uranium equivalent mass fraction 0÷200·10-4 % ±5 %

General specifications
Tool length, mm 2450 not more than
Tool diameter, mm 76 not more than
Tool weight, kg 60 not more than
Power supply:
supply voltage, V
supply frequency, Hz


Borehole diameter, mm 100÷350  
Logging speed, m/hr:
in terrigenous section
in carbonate section

up to 600
up to 400
Combinability feed-through  
Location in the borehole free  
GR detector  CsJ(Na)