Decision by Expert Technical Council at State Commission on Mineral Resources
Recommend the inclusion of the combined steady-state nuclear LWD tool (made by OOO NPP Energiya, LLC) in the register of technologies approved by Expert Technical Council at State Commission on Mineral Resources.


Geophysical equipment

Geophysical instrumentation manufactured by RPE Energiya, LLC (ООО «НПП Энергия»)

Key element


Neutron tubes developed by RPE Energiya, LLC (ООО «НПП Энергия») and FSUE Integrated Plant “Electrohimpribor” (ФГУП «Комбинат «Электрохимприбор»)


Pulsed neutron logging tool PINK-43

ПИНК-43Designed to carry out borehole pulsed neutron logging techniques. Pulsed neutron generator with preset frequency radiates geological materials around the borehole tool. At double distance from pulsed neutron source gamma-ray detectors (modification of 2INGK (2ИНГК)) or thermal neutron detectors (modification of 2INNK (2ИННК)) record time spectrum of gamma-ray or thermal neutrons respectively.

Used to explore open hole or cased wells including through tubing during well operation.

Active tasks:

  • determination of current oil saturation on oil fields with oilfield brine over 50 g/l;
  • determination of gas-liquid contact;
  • monitoring over frac job fracture penetration when using marked propant agent;
  • lithologic sectional layering.

In modification 2INNK (2ИННК) time spectrum of thermal neutrons are recorded through both probes in 64 time channels, 40 μs each.
Detector units – proportional or corona helium counter tubes (He-3). On the distant probe a HP helium counter tube is used to increase accuracy of performed measurements.

In modification 2INGK (2ИНГК) time spectrum of radiative capture gamma-ray are recorded through both probes in 64 time channels, 40 μs each. Detector units – scintillation crystals NaI(Tl).

In both modifications pulsed neutron generator ING-10-50-120 (ИНГ-10-50-120) or similar with neutron output up to 1×108 neutrons/sec is used as neutron source with energy of 14 MeV. 

If necessary it can be equipped with gamma-ray logging channel to measure natural radioactivity of geological materials and with collar locator to measure boring casing integrity and/or tubing.

  Measured parameters Range Accuracy
Natural gamma-ray EDR for 2INNK (2ИННК) 0÷250  μR/h 15 % (rel.)
Neutron-capture cross-section 3÷55 c.u. 2.5 % (rel.)
Collar locating at least seven times signal level increasing when passing through a collar 


General technical specifications 2INNK (2ИННК) 2INGK (2ИНГК)
Tool overall length (with gamma-ray and collar locator channel), mm 3999 3999
Tool diameter, mm 43 43
Total tool weight, kg 38 38
Maximum ambient temperature, °C 100 
Maximum hydrostatic pressure, MPa 80 
Logging speed, m/h 40÷130
Number of cores of logging cable 1÷3 
Combinability terminal / transit 
Position in well free