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 w/out housing assembly	NGT-T with housing assembly	NGT-CS	DGA FOCUSED GAMMA	NGT-B	NGT-S
Application	Geosteering/ MWD	Geosteering/ MWD	Geosteering/ MWD	Geosteering/MWD	Wireline/ Production	Wireline/ Production
Mechanical
Diameter (OD)	1.36″	1.875″	1.050″	1.30″	1.6875″	1.375″
Length (make up)	13.6″	34.05″	18.83″	13.6″	22.25″	25.2″
Weight	1.7 lb.	15.0 lb.	1.5 lb.	3.0 lb.	6.0 lb.	4.0 lb.
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
End Connectors	MDM 15-Pin	200 °C, 10-Pin GE	MDM 15-Pin	MDM 15-Pin	GO Single-Pin	GO Single-Pin
Material	Aluminum Alloy	BeCu	Aluminum Alloy	Aluminum Alloy/Tungsten	Ti-6Al-4V	Ti-6Al-4V
Pressure	NR	18,000 PSI	NR	NR	15,000 PSI	18,000 PSI
Performance
Sensitivity	2.0 Counts per API	1.7 Counts per API	1.8 Counts per API	0.6 Counts per API	1.8 Counts per API	1.6 Counts per API
Accuracy	+/- 5% to 300°F. +/- 10% to 350°F.	+/- 5% to 300°F. +/- 10% to 350°F.	+/- 5% to 300°F. +/- 10% to 350°F.	+/- 5% to 300°F. +/- 10% to 350°F.	+/- 5% to 300°F. +/- 10% to 350°F	+/- 5% to 300°F. +/- 10% to 350°F
Thin-Bed Resolution (8″ hole diameter, at 50% points)	6.8″	6.8″	8.8″	8.8″	6.2″	8.8″
Environmental
Survival Temperature	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.	250 G., 0.5 mS.	250 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.	500 G., 0.5mS.	500 G., 0.5mS.
Power Requirements
Input Voltage	22-30 Volts	22-30 Volts	22-30 Volts	22-30 Volts	46-48 Volts	46-48 Volts
Input Current	18-14 mA. (constant power)	18-14 mA. (constant power)	18-14 mA. (constant power)	18-14 mA. (constant power)	20-23 mA	20-23 mA
Maximum Voltage	31.5 Volts	31.5 Volts	31.5 Volts	31.5 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 1.5 to 3.5 uS	CBG Telemetry or Wireline Pulse	CBG Telemetry or Wireline Pulse