NGT-B Production Logging Tool

NGT-B

Gamma Tool

The NGT-B is a Nal(TI) scintillator based natural gamma ray logging tool that is used to make depth corrections to logs by identifying the location of naturally radioactive rock formations behind casing that can be correlated with open-hole logs.

The Ti-6Al-4V Titanium pressure housing not only provides maximum protection in sour-gas environments, but minimizes gamma ray attenuation due to its low density.

NGT-B electronics are fully temperature compensated to maintain constant count-rates at all rated temperatures.  It is available as either high speed digital telemetry or analog pulse output.

NGT-B

Gamma Tool

The NGT-B is a Nal(TI) scintillator based natural gamma ray tool that is used to make depth corrections to logs by identifying the location of naturally radioactive rock formations behind casing that can be correlated with open-hole logs.

The Ti-6Al-4V Titanium pressure housing not only provides maximum protection in sour-gas environments, but minimizes gamma ray attenuation due to its low density.

NGT-B electronics are fully temperature compensated to maintain constant count-rates at all rated temperatures.  It is available as either high speed digital telemetry or analog pulse output.

NGT-B Specifications

Mechanical Diameter (OD) 1 11/16” (available in 1 3/8”, NGT-S)
Length (make-up) 22.25”
Weight 6.8 lb.
End Connectors GO Single Pin
Material Ti-6Al-4V Titanium
Performance Sensitivity/Range 1.8 counts per API/0-10,000 API
Accuracy +/- 10% at 175°C
Thin-Bed Resolution (7″ casing diameter, at 50% points) 6.2”
Environmental Operating Temperature 175°C (350°F)
Survival Temperature 204°C (400°F)
Max. Temperature Ramp Rate 5°F per minute
Vibration (3 axis); 50-300 Hz, Random 30 GRMS
Shock (Z axis) 250 G, 0.5 mSec.
Shock (X or Y axis) 500 G, 0.5 mSec.
Pressure 15,000 psi
Power Requirements Input Voltage 46-48 VDC, 50VDC Max.
Input Current 20mA
Output Signal Digital Telemetry or Pulse +5V to GND, 5 uSec width

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