NGT-T Gamma Tool

NGT-T

1.36″ OD Gamma Tool

The NGT-T (Natural Gamma Tool-Tensor) is the largest selling MWD gamma tool on the market! With more than 4500 units currently being used in the field worldwide there is no other gamma tool that even comes close. Initially developed for Tensor in 1993, the NGT-T has been continuously enhanced and improved as the MWD/DD downhole tools industry has matured over the past 25 years.

Designed to meet the Tensor MWD system specifications, the NGT-T contains 15-pin high temperature Micro-D Subminiature (MDM) connectors on the top (male pin) and bottom (female socket). All 15 wires pass through the tool from top to bottom connectors. The gamma tool utilizes three wire connections, Pin1 (GND), Pin4 (DC Power) and Pin8 (Sig Out).

NGT-T

1.36″ OD Gamma Tool

The NGT-T (Natural Gamma Tool-Tensor) is the largest selling MWD gamma tool on the market! With more than 4500 units currently being used in the field worldwide there is no other gamma tool that even comes close. Initially developed for Tensor in 1993, the NGT-T has been continuously enhanced and improved as the MWD/DD downhole tools industry has matured over the past 25 years.

Designed to meet the Tensor MWD system specifications, the NGT-T contains 15-pin high temperature Micro-D Subminiature (MDM) connectors on the top (male pin) and bottom (female socket). All 15 wires pass through the tool from top to bottom connectors. The gamma tool utilizes three wire connections, Pin1 (GND), Pin4 (DC Power) and Pin8 (Sig Out).

NGT-T Specifications

Detector	Nal(TI) Scintillator Crystal	1.0” Diameter X 4.0” Length
Detector	Photomultiplier	R3991A (Hamamatsu)
Mechanical	Diameter (OD)	1.36”
	Length (make-up)	13.6”
	Weight	1.7 lb.
	End Connectors	Micro-D Subminiature, 15-Pin
	Material	Aluminum Alloy
Performance	Sensitivity	1.14 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 RMS
	Shock (3 axis)	1000G, 0.5ms, half-sine
Power Requirements	DC Input Voltage	17-48 VDC, 50VDC Max.
Power Requirements	Tool Current	8-11 mA
Output Signal	Negative Pulse	+5V to GND, 5 uSec width

* Counts are collected with gamma tool mounted within standard BeCu pressure barrel, (OD 1.875″, ID 1.500″). API Calibration performed with AEA Technology, QSA Inc., KUTh Field Verifier #188074, S/N 255 Radionuclides: K-40(11.7%), U-238(90 ppm), Th-232(40 ppm).