Century Geophysical - Model 4239 - Express Stack In-Line Litho Density Tool Brochure

The Series 4239 In-Line Litho-Density Tool sub uses two focused density detectors to computer borehole compensated density real time while logging.  This 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 all other Express Stack™ Tools except for the 4841(DIL).