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Formation density gamma-gamma logging memory tool АPRК-GGК-108


The tool has the following modifications by max operating temperature Tmax and upper value of borehole hydrostatic pressure Pmax :
  T max =90 °C, Pmax= 80 MPa;
  T max =120 °C, Pmax= 80 MPa;
Designed for well logging (without usage of logging cable) using compensated gamma-gamma-density logging  technique. 

Used for logging of nearly horizontal and horizontal sections of oil and gas wells filled with oil- and water-base mud with diameter up to 240 mm.  

 well sections and lithological changes correlation;
 detailed lithological identification;
 stratigraphic studies;
 reservoir properties identification/refinement;
 rocks mineral composition identification/refinement.

The tool is designed for work with cesium-137 gamma-ray  source with activity from 6.65×109 to 3× 107Bq. The measuring equipment contains a chamber for cesium-137 gamma-ray  encapsulated source. GR detectors are 25×60 mm scintillation counters CsJ(Na).



 Measured parameters Rocks volume density
Measurement range 1.7×103 to 3.0×103 kg/m3
Limit of basic relative measurement error from 1.7×103 to 2.0×103 kg/m3    ±2%
from 2.0×103 to 3.0×103 kg/m3    ±1.2%


 General specifications
Tool length, mm 2570 not more than
Tool diameter, mm 108 not more than
Tool weight, kg 120 not more than
Power supply, self-contained, V 12  
Ambient operating temperature range, °C from -10 to +120 not more than
Max operating pressure, -a 80 not more than
Borehole diameter, mm 120÷216  
Logging speed, m/ hr 400  
Operating time in memory mode,  hours in record mode 10 not less than
Records frequency, pollings per sec 2  
Location on the drilling tool