Spec Sheet:

Cased-Hole Logging

Fluid Density Radioactive

Fluid Density Radioactive

Fluid Identification Tool

Fluid Density Radioactive (FDR) is used for fluid identification. The tool measures the mixture density in the wellbore, which allows the fraction or hold-up of any two phases of oil, water or gas to be determined.


Key Features

  • Unaffected by flow rates
  • Americium 241 gamma ray source
  • Shielded detector highly resistant to radioactive scale interference
  • Combinable with other Ultrawire™ tools
  • Memory or surface read-out operation

Technical Information

Service Name


Length585 mm / 23.0 in
Weight4.4 kg / 9.6 lbs
OD43 mm / 1.688 in
Measurement range0-1.25 g/cc
Accuracy± 0.03 g/cc
Resolution0.01 g/cc
Maximum pressure1030 bar / 15 000 psi
Maximum temperature177 °C / 350 °F


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