This three-coil slim hole induction tool was designed to provide conductivity
and converted resistivity logs in open boreholes or PVC/plastic cased holes
with casing sizes 5.08 cm (2 in.) or greater. The probe measures the rock
conductivity in borings and wells within a zone of 25.4 to 127 cm (10 to 50
in.) from the well, but is not sensitive to the borehole fluid, casing, or grouting
materials. The tool can also be used in air filled holes to measure the
conductivity response. In addition, the tool also simultaneously records
natural gamma ray in API units or CPS for determination of clay content and
radioactivity measurements.
FEATURES
Properties Measured
1. Natural Gamma:
2.2 x 10.2 cm (0.875 x 4.0 in.)
NaI Scintillation
Offset: 17.5 cm (6.9 in.)
2. Induction:
Coil-focused conductivity
3-Coil Conductivity Electrodes
Offset: 152.2 cm (59.9 in.)
Main Coil Spacing: 50.0cm (20 in.)
Length: 266.7 cm (105.0 in.)
Temperature: 70 C (158 F)
Diameter: 41 mm (1.625 in.)
Pressure: 281 kg/cm2 (4000 PSI)
Weight: 7.46 kg (20 lb.)
Logging Speed: 9 m/min. (30 ft./min.)
Tool Voltage Required: 30 VDC
TOOL#: 9512
