Flow Rate Tester (FRT) Tool


Extracts wellbore and formation fluids to obtain accurate pressure measurements and uncontaminated fluid-samples


  • Formation pressure measurement and fluid samples conditions 
  • Pump clean-up indicator for representative samples
  • Early productivity indication (mini-DST)

Features and Benefits

  • The FRT is an economical formation tester with an innovative dual-packer system for zonal isolation.
  • The FRT can test all potential formations in one descent for real-time measurements.
  • The FRT provides separate perforation isolation for production testing in cased holes.

Tool Description

The Weatherford Flow Rate Tester (FRT) tool is a modular, wireline-deployed formation tester and sampling system. The tool uses a downhole pump for extracting wellbore and formation fluids to obtain accurate pressure and uncontaminated fluid-samples. Zonal isolation is achieved by using an innovative Weatherford dual-packer system or a conventional single probe, depending on the application. Test intervals can be further optimized with variable packer spacing, ranging from 1.6 to 16.4 ft (0.5 to 5.0 m).

The FRT can test all potential formations in one descent, which improves test results with real-time measurements and saves rig time by providing timely answers. The FRT Pump can be configured to RIH with either the Probe or the Packers to perform mini drillstem-type tests (mini-DST) reaching beyond the near-wellbore-damaged region. Pressure transient analysis is performed on each test to determine extrapolated reservoir pressure, permeability, and skin damage.

Reservoir deliverability is determined using flow-rate testing with a downhole pump. The FRT can also identify fluids using resistivity, capacitance, and pump characteristics. The FRT can collect two samples for pressure, volume, and temperature (PVT) analysis. When a suitable sample quality is reached, the fluid can be pumped into a DOT-approved transportable sample cylinder. These cylinders can be configured with a nitrogen charge to maintain sample overpressure during the temperature change from reservoir to surface. The FRT is also hydrogen sulfide (H2S) rated, and the DOT sample cylinders are made of nonabsorbing, corrosion-resistant alloys for a safe representative sample.