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NGT-CN Gamma Tool Specifications

Overview | Specifications

The CBG NGT-CN Gamma tool is the third generation version of the the industry standard NGT-T for Geosteering and MWD applications.

CBG Corp. NGT-CN Gamma Ray Tool: Click for larger image.
NGT-CN Specifications
Version Without barrel assembly With 24″ barrel & subs
Application Geosteering/ MWD Geosteering/ MWD
Mechanical
Diameter (OD) 1.36″ 1.875″
Length (make up) 13.6″ 34.05″
Weight 1.9 lb. 15.0 lb.
End Connectors MDM 15-Pin 200 °C, 10-Pin GE
Material Aluminum Alloy BeCu
Pressure NR 18,000 PSI
Performance
Typical Sensitivity 3.2 CPS per API 2.2 CPS per API
Accuracy +/- 2% to 300°F.
+/- 5% to 350°F.
+/- 2% to 300°F.
+/- 5% to 350°F.
Maximum API Range
@ 5% error
2500 API 3000 API
Thin-Bed Resolution (In 8″ hole diameter, at 50% points) 10.3″ 10.3″
Environmental
Operating Temperature -20 to +350 °F. -20 to +350 °F.
Survival Temperature
(at reduced accuracy)
-40 to +400°F. -40 to +400°F.
Max Heat/Cool rate 5°F./Minute 5°F./Minute
Vibration (3 axis)
50-1000 Hz
Random spectrum
20 G. RMS 20 G. RMS
Shock (Z-axis) 500 G., 0.5 mS. 500 G., 0.5 mS.
Shock (X or Y-axis) 1000 G., 0.5mS. 1000 G., 0.5mS.
Power Requirements (all tools use NexGen electronics)
Input Voltage 17-48 Volts 17-48 Volts
Input Current 11-8 mA. (9 mA at 28 volts) 11-8 mA. (9 mA at 28 volts)
Maximum Voltage 50 Volts 50 Volts
Output Signal
Negative Pulse +5 volts to GND
5 uS fixed width
+5 volts to GND
5 uS fixed width