4239 Stacked Series Photoelectric Density Tool Sub 2009 All Rights Reserved-Century Wireline Services
The Series 4239 Stacked Photoelectric Density Tool Sub uses two focused density detectors to compute borehole compensated density real time while logging. This logging tool also measures the amplitude of the returning gamma pulses using a photoelectric reader in order to determine lithology directly. It can distinguish between sandstone, limestone, dolomite, shale, and other rocks in the form of an additional logging curve. Additionally, the tool also records caliper readings. It requires the use of the 4000 Stack Gamma Ray Tool Sub, which provides the needed telemetry, and is compatible with the 4175 Stack Neutron Tool Sub.
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FEATURES Properties Measured 1. Caliper: Motorized, uphole actuated 33.02 cm (13 in.). Offset (measured from top of Gamma Ray Tool Sub): 589.79 cm (232.2 in.) 2. Far Density: 2.2 x 10.16 cm (0.875 x 4.0 in.) 35.8 cm (14.1 in.) spacing Offset: 630.43 cm (248.2 in.) 3. Compensated Density: Cdl (compensated density log) offset: 630.43 cm (248.2 in.) 4. Compensation: Comp (compensation) offset: 630.43 cm (248.2 in.) 5. Near Density: 2.2 x 3.2 cm (0.875 x1.25 in.) 20 cm (7.9 in.) spacing Offset: 638.25 cm (251.28 in.) 6. Photoelectric: 2.2 x 3.2 cm (0.875 x1.25 in.) 20 cm (7.9 in.) spacing Offset: 638.25 cm (251.28 in.) 7. Radioactive Source: 200–300 mCi Cesium 137 bullplug Offset: 658.62 cm (259.3 in.) Length: 348.13 cm (137.06 in.) Temperature: 85 C (185 F) Diameter: 63.5 mm (2.5 in.) Pressure: 175 kg/cm2 (2500 psi) Weight: 58 kg (128 lb.) Logging Speed: 9 m/min. (30 ft./min.) TOOL#: 4239
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