The Multi-Parameter E-Log, Neutron logging tool was developed to
replace the 9055 which was historically Century’s most popular tool.
The tool duplicates all parameters on the 9055 while adding the 16
inch normal, 64 inch normal, and lateral resistivities. The 9057 natural
gamma circuit features a low dead time and the ability to measure very
high count rates making it a favorite for uranium logging. The tool
records ten different parameters simultaneously in one pass of the
borehole. The ten parameters are the following: natural gamma,
spontaneous potential, single point resistance, 16 in. normal resistivity,
64 in. normal resistivity, 48 in. lateral resistivity, neutron-neutron,
temperature, delta temperature, slant angle (tilt) and azimuth (bearing).
Slant angle, azimuth, and natural gamma are optional.
FEATURES
Properties Measured
1. Natural Gamma:
2.2 x 10.16 cm
(0.875 x 4.0 in.)
NaI Scintillation
Offset: 14.7 cm (5.8 in.)
2. 64 in. Normal Resistivity:
Offset: 109.2 cm (43 in.)
3. 16 in. Normal Resistivity:
Offset: 170.2 cm (67 in.)
4. Neutron-Neutron:
He 3 Detector 2.54 cm x 15.2 cm (1 in.
x 6 in.)
Offset: 200.7 cm (79 in.)
5. Lateral Resistivity 48 in.
Offset: 139.7 cm (55 in.)
6. Spontaneous Potential:
+/- 0.1 mv resolution
Offset: 27.7 cm (10.9 in.)
7. Single Point Resistance:
+/- 0.1 ohm resolution
Offset: 190.5 cm (75 in.)
8. Temperature & Delta Temperature:
0.004 C (0.007 F) resolution
Offset: 220.5 cm (86.8 in.)
9. Slant Angle & Azimuth:
3-axis magnetometer and 2-axis
inclinometer
Offset: 200.7 cm (79 in.)
Length: 237 cm (93.6 in.)
Temperature: 80 C (176 F)
Diameter: 53 mm (2.1 in.)
Pressure: 281 kg/cm2 (4000 PSI)
Weight: 15 kg (33 lb.)
Logging Speed: 9 m/min. (30 ft./min.)
Tool Voltage Required: 36 VDC
TOOL#: 9057
