You are here

Pulsed neutron logging memory tool APRK-INNK-108


The tool has the following modifications by max operating temperature T max 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) by pulsed neutron-neutron thermal logging

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.

 current oil saturation determination in oil fields with mineralized formation water;
 gas-liquid contact identification;
 rocks porosity evaluation;
 well section lithological identification;
 well technical condition control (identification of behind-the-casing flows and places of water entry into the string).

The sonde station contains two thermal neutron proportional helium counters which are located at two distances from neutron pulsed source. As a source of neutrons with energy of 14 MeV we use neutron pulsed generator; neutron output (at neutron pulse generation frequency of 10 Hz) is 0.5×108 neutron/sec. The measuring equipment contains a chamber for neutron pulsed source.


 General specifications
Tool length, mm 4700 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, MPa 80 not more than
Borehole diameter, mm 120÷400  
Logging speed, m/hr 800  
Operating time in memory mode,  hours in record mode 6 not less than
Neutron generation frequency, Hz  up to 20  
Neutron generator type ING-10-50-120TBT  
Quantity of time channels, for each detector 60  
Location on the drilling tool