NGT-B Gamma Tool Specifications

for Wireline

When comparing cased-hole logs made by this tool with open-hole logs, it will be necessary to correct the readings for casing attenuation. This may be done by using the “Collar-Correction” graphs on our NGT-T web page if you know the casing thickness.

NGT-B Specifications
Application	Wireline/ Production
Mechanical
Diameter (OD)	1.6875″
Length (make up)	22.25″
Weight	6.0 lb.
Operating Temperature	-77 to +350 °F
End Connectors	GO Single-Pin
Material	Ti-6Al-4V
Pressure	15,000 PSI
Performance
Sensitivity	1.8 Counts per API
Range	0 to 10,000 API
Accuracy	+/- 5% to 300°F. +/- 10% to 350°F
Thin-Bed Resolution (7″ casing diameter, at 50% points)	6.2″
Environmental
Survival Temperature	400°F.
Max Heat/Cool rate	5°F./Minute
Vibration (3 axis) 50-300 Hz Random spectrum	30 G. RMS
Shock (Z-axis)	250 G., 0.5 mS.
Shock (X or Y-axis)	500 G., 0.5mS.
Power Requirements
Input Voltage	46-48 Volts
Input Current	20-23 mA
Maximum Voltage	50 Volts
Output Signal
	CBG Telemetry or Line Pulse