NGT-075 Gamma Tool

NGT-075

0.75″ OD Gamma Tools

The NGT-075 gamma tool is the smallest diameter scintillator gamma tool available on the market today.  With an outside diameter of only 0.75” it is ideally suited for mounting within the drill-collar wall to make superior directional gamma sensors.

Magnetic materials are kept to an absolute minimum to limit interference with closely mounted magnetometers.

NGT-075

0.75″ OD Gamma Tools

The NGT-075 gamma tool is the smallest diameter scintillator gamma tool available on the market today.  With an outside diameter of only 0.75” it is ideally suited for mounting within the drill-collar wall to make superior directional gamma sensors.

Magnetic materials are kept to an absolute minimum to limit interference with closely mounted magnetometers.

NGT-075 Specifications

Detector  Nal(TI) Scintillator Crystal 0.53” Diameter  X 4.0” Length
Photomultiplier R4177A (Hamamatsu)
Mechanical Diameter (OD) 0.75”
Length (make-up) 13.7”
Weight 8.4 oz.
End Connectors Flying lead (Power, GND, Output)
Material Aluminum Alloy
Performance Sensitivity 1.0 CPS/API
Accuracy +/- 5% to 300°F
+/- 10% to 350°F
Max API @ 5% PPU error 10,000 API
Thin-Bed Resolution (8” hole Diameter) 6.8”
Environmental Operating Temperature 0°F to 350°F
Survival Temperature (reduced accuracy) -40°F to 400°F
Heat/Cool Rate, Max.  5°F per minute
Vibration (3 axis) 50-1000 Hz, Random 20G RMS
Shock (Z axis) 500 G, 0.5 mSec
Shock (X or Y axis) 500 G., 0.5 mS duration
Power Requirements DC Input Voltage 17-48 VDC, 50VDC Max.
Tool Current 8-11 mA
Output Signal Negative Pulse +5V to GND, 5 uSec width

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