Gamma Ray Tools Specifications

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CBG Corp. NGT-T Gamma Ray Tool: Click for larger image.

Gamma Ray Tool Specifications	NGT-T without barrel	NGT-T with barrel	NGT-CS	DGA Focussed Gamma	NGT-CN	NGT-075
Application	Geosteering	Geosteering	Geosteering	Geosteering	Geosteering	Geosteering
Mechanical
Diameter (OD)	1.36″	1.875″	1.05″	1.30″	1.36″	0.75″
Length (make up)	13.6″	34.05″	18.83″	13.6″	13.6″	14.5″
Weight	1.7 lb.	15.0 lb.	1.5 lb.	3.0 lb.	1.9 lb.	8.4 oz.
End Connectors	MDM 15-Pin	200°C, 10-Pin GE	MDM 15-Pin	MDM 15-Pin	MDM 15-Pin	7-pin AirBorn
Material	Aluminum Alloy	BeCu	Aluminum Alloy	Aluminum Alloy/Tungsten	Aluminum Alloy	Aluminum Alloy
Pressure	NR	18,000 PSI	NR	NR	NR	NR
Performance
Typical Sensitivity	2.0 Counts/API	1.7 Counts/API	1.8 Counts/API	0.6 Counts/API	3.8 Counts/API	0.95 Counts/API
Accuracy	+/-4% @ 300°F +/-8% @ 350°F	+/-4% @ 300°F +/-8% @ 350°F	+/-4% @ 300°F +/-8% @ 350°F	+/-2% @ 300°F +/-5% @ 350°F	+/-2% @ 300°F +/-5% @ 350°F	+/-2% @ 300°F +/-5% @ 350°F
Maximum API Range @ 5% error	5000 API	5000 API	5000 API	15000 API	2500 API	10000 API
Thin-Bed Resolution (8″ hole diameter, at 50% points)	6.8″	6.8″	8.8″	8.8″	10.3″	6.8″
Environmental
Operating Temperature	-77 to +350 °F.	-77 to +350 °F.	-77 to +350 °F	-77 to +350 °F	-77 to +350 °F	-77 to +350 °F
Survival Temperature (reduced accuracy)	400°F.	400°F.	400°F.	400°F.	400°F.	400°F.
Max Heat/Cool rate	5°F./Minute	5°F./Minute	5°F./Minute	5°F./Minute	5°F./Minute	5°F./Minute
Vibration (3 axis) 50-300 Hz Random spectrum	30 G.	30 G.	30 G.	30 G.	30 G.	30 G.
Shock (Z-axis)	500 G., 0.5 mS.	500 G., 0.5 mS.	500 G., 0.5 mS.	500 G., 0.5 mS.	500 G., 0.5 mS.	500 G., 0.5 mS.
Shock (X or Y-axis)	1000 G., 0.5mS.	1000 G., 0.5mS.	1000 G., 0.5mS.	1000 G., 0.5mS.	1000 G., 0.5mS.	1000 G., 0.5mS.
Power Requirements
Input Voltage	22-30 Volts	22-30 Volts	22-30 Volts	17-48 Volts	17-48 Volts	17-48 Volts
Input Current	18-14 mA (constant power)	18-14 mA (constant power)	18-14 mA (constant power)	11-8 mA (9 mA at 28 volts)	11-8 mA (9 mA at 28 volts)	11-8 mA (9 mA at 28 volts)
Maximum Voltage	31.5 Volts	31.5 Volts	31.5 Volts	50 Volts	50 Volts	50 Volts
Output Signal
Negative Pulse	+5V to GND 1.5 to 3.5 uS	+5V to GND 1.5 to 3.5 uS	+5V to GND 1.5 to 3.5 uS	+5V to GND 5 uS fixed width	+5V to GND 5 uS fixed width	+5V to GND 5 uS fixed width