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Pulsed neutron logging tool AINK


The tool has the following modifications by max operating temperature T max and upper value of borehole hydrostatic pressure Pmax :
  by temperature: 120°C,
  by pressure: 80 MPa.

Designed for measurements using pulsed neutron logging (2INNK or 2INGK) by thermal neutrons time spectra recording (2INNK) or gamma ray recording (2INGK) by two sondes with simultaneous recording of gamma-ray logs (GR) in 2INNK modification and casing collar locator (CCL), temperature inside the tool, tool head voltage.

Used for cased holes logging including through-tubing logging during well operation; the tool operates on monocable up to 7 km long.

 current oil saturation determination in oil fields with mineralized formation water;
 gas-liquid contact identification;
 rocks porosity evaluation;
 well section lithological identification.


 Measured parameters Range Error
ER of natural gamma radiation for 2INNK 0÷250 mR/h ±15 %
Neutron-capture cross-section 3÷30 c.u. 2.5 %
Casing collar location when the tool passes the casing collar the signal strength increases not less than by a factor of five.

 General specifications 2INNÊ 2INGÊ
Tool length, mm 3950 3700
Tool diameter, mm 43 43
Tool weight, kg 20 18
Power supply:
supply voltage, V
frequency, Hz
= 150±5 V, 30 mA
Neutron generator current consumptionat pulse frequency of 10 Hz, mA 70÷100
Logging speed, m/hr 120÷130
Combinability bottom
Location in the borehole free