Fluid Density Radioactive

Fluid Density Radioactive

The CNPS FDR provides a reliable, durable and comparatively safe means of measuring fluid density at all well deviations and flow rates.


The tool uses a low energy Americium-241 gamma ray source with radiation levels approaching background at a distance of only one meter from the tool. The shielded tool has been designed to be immune to the effects of radioactive scale and the very high count rates provide excellent statistics. A radiation shield (Type A rated) is provided which can be locked on the tool so that the source can be left in place between jobs.



Gamma rays emitted by the RA source at one end of a measuring cell through which the well fluid passes, are detected at the opposite end by a scintillation detector and photomultiplier. The count rate is a logarithmic function of the fluid density. The detector is temperature stabilized and matched to the gamma energy of the source. The tool may be calibrated in air and fresh water using CNPS supplied multipliers to derive calibration values applicable to oil and saltwater densities.



Multi-phase Production Profiling Fluid Identification Horizontal / Highly Deviated Wells High Fluid Flow Rates INTERFACING & TOOL COMBINATIONS Simultaneous Operation with other PL Tools Sondex Compatible and interchangeable. OPTIONS 1 11/16″ & 1 3/8″ versions Ultrawire ™ toolbus (UW) or Memory toolbus (Mbus) Slickline memory or surface readout mode (with suitable telemetry controller)



FDR Telemetry XTU or UMT

Pressure(max) 105MPa

Temperature(max) 177°C

Range 0 to 1.25 g/cc

Resolution 0.01 g/cc

Accuracy 0.03 g/cc

Source Am241 5.5 GBq (150 mCi)

Voltage(nominal) 18VDC

Current <35mA

Length 585mm

Measure Point 110mm

Diameter 43mm

Weight 4.36kg

Material Corrosion Resistance

Throughout End Thread(top/bottom) 13/16″ 12 UN2A

GO End connector(top/bottom) 4mm single banana connector.

Weight 1 kg


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