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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 resistivity. 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.


Fully downhole digital
Quick automatic setup, unique tool identification
Designed for one-man operation
Can be customized to your specific needs

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:
    He3 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.) 


Length: 167 cm (65.75in.)

Temperature: 70C (158F)

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

Tool #:9057

Part #:336600B


9057Product Description

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