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Background Information
The Spectral Gamma tool is a three-channel analysis of the gross gamma ray spectrum as it relates to potassium, uranium, and thorium content. An internal energy source of
less than 1 micro-curries of Cs137 is used to excite the crystal and to stabilize the electronics prior to logging.
The spectral window is recorded via a 256 channel spectrum board so that the
different energy levels from the formation can be analyzed.
| Features |
| Properties Measured (see diagram) |
Tool Specifications |
1. Potassium (K)
Percent 40
Offset: 135.63 cm (53.4in.)
2. Uranium (U):
Parts Per Million
Offset: 135.63 cm (53.4in.)
3. Thorium (T)
Offset: 135.63 cm (53.4in.)
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Length: 167 cm (65.75in.)
Temperature: 65 C (150 F)
Diameter: 60.96 mm (2.40 in.)
Pressure: 232 kg/cm2 (3000 PSI)
Weight: 16.82 kg (37 lb.)
Logging Speed: 1.5 m/min. (5 ft./min.)
Tool Voltage Required: 60 VDC
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| Sensor Response Ranges |
| Sensor |
Accuracy |
| K, percent 40 |
+/-2% |
| U, PPM |
+/-10 PPM |
| T, PPM |
+/-10 PPM |
| Tool Information |
| Item |
Part # |
Part # |
| Spectral Gamma Logging Tool |
7201 |
272000 |
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