NGT-075-B Gamma Tool

NGT-075-B

0.75″ OD Gamma Tools

The NGT-075-B 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-B

0.75″ OD Gamma Tools

The NGT-075-B 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-B 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 .76 CPS/API
Accuracy +/- 5% to 300°F
+/- 10% to 350°F
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) 50-1000Hz, Random 20G (14G RMS)
Shock (3 axis) 500G, 0.5ms, half-sine
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
MWD Tools | Gamma Sensors

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