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Gamma-gamma density logging tool 2GGKP

2ГГКП 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 rocks bulk density.

Used for logging of open oil and gas holes filled with any mud (including barite, hematite additive compound); 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;
 stratigraphic studies;
 reservoir properties identification/refinement;
 rocks mineral composition identification/refinement.

The sonde station contains a chamber for fast neutron encapsulated source 137Cs (with activity from 6.65×109 to 1.28×1010 Bq) and two gamma radiation scintillation detectors with directional sensitivity diagram.

 Measured parameters Measurement range Error
Rocks bulk density 1.7÷3.0 g/cm3 ±1.5 % in the range 1.7÷2.0 g/cm3
±1.2 % in the range 2.0÷3.0 g/cm3

 General specifications
Tool length, mm 3450 not more than
Tool diameter, mm 76 not more than
Tool max diameter, mm 84 not more than
Tool weight, kg 75 not more than
Power supply:
supply voltage, V
supply frequency, Hz


Drive control multiple, at the command from the surface  
Arms opening (closing) time, min 2 not more than
Borehole diameter, mm 100÷350  
Logging speed:
in terrigenous section, m/hr
in carbonate section, m/hr

up to 600
up to 400
Combinability bottom  
Location in the borehole clamped