NGT-100 Gamma Tool
NGT-100
Gamma Tool (1.0”)
The 1.0” diameter NGT-100 is CBG’s next generation small diameter gamma suited for mounting within drill-collar walls. It contains our new higher temperature electronics cushioned between pre-molded pads, providing enhanced shock and vibration protection. The pre-molded pads also eliminate thermal expansion of flowed potting materials around and under the electronic components. The NGT-100 also has fully enclosed electronics and thru-wires to improve reliability and isolate external noise. With a significantly higher vibration tolerance and a greater sensitivity than 0.75” diameter gamma tools, the NGT-100 is the perfect small diameter solution for more demanding drilling environments.
Magnetic materials are kept to an absolute minimum to limit interference with closely mounted magnetometers.
NGT-100
Gamma Tool (1.0”)
The 1.0” diameter NGT-100 is CBG’s next generation small diameter gamma suited for mounting within drill-collar walls. It contains our new higher temperature electronics cushioned between pre-molded pads, providing enhanced shock and vibration protection. The pre-molded pads also eliminate thermal expansion of flowed potting materials around and under the electronic components. The NGT-100 also has fully enclosed electronics and thru-wires to improve reliability and isolate external noise. With a significantly higher vibration tolerance and a greater sensitivity than 0.75” diameter gamma tools, the NGT-100 is the perfect small diameter solution for more demanding drilling environments.
Magnetic materials are kept to an absolute minimum to limit interference with closely mounted magnetometers.
NGT-100 Specifications
P/N 208-000-000
| Detector | Scintillator Crystal | Sodium Iodide, Na(TI) |
|---|---|---|
| Photomultiplier | Hamamatsu R3991A | |
| Mechanical | Diameter (OD) | 1.0” w/out shrink tubing sleeve 1.04” w/shrink tubing sleeve |
| Length (make-up) | 12.0” | |
| Weight | 14 oz. | |
| Connectors | Flying lead (PWR, GND, Signal Out) | |
| Material | Aluminum Alloy | |
| Performance | Sensitivity | 1.25 CPS/API |
| Accuracy | +/- 5% to 150°C +/- 10% 150°C to 182°C |
|
| Environmental | Temperature (Operating) | -15°C to 182°C |
| Temperature (Survival) w/ reduced accuracy | -40°C to 200°C | |
| Temperature ramp rate | 2.8°C (5°F) per minute | |
| Vibration (3 axis) 50-1000 Hz, Random | 30G (20G RMS) | |
| Shock (3 axis) | 750G, 0.5 ms, half-sine | |
| Burst Filter | Reduces spurious counts due to extreme shock/vibration and external system electronic noise. | |
| Power Requirements | Power (DC input Voltage) | 10-48 VDC, 50VDC Max. |
| Tool Current | 10mA @ 28V | |
| Output Signal | Output Signal | Negative Pulse, +5V to GND, 5 usec pulse width |