A615 Flowmeter Tool

Flowmeter sondes are used to measure fluid flow rates within cased or open wells.

The movement of water is measured by the use of a low inertia impeller that spins on low-friction bearings. A magnet on the end of the impeller shaft activates a Hall effect device in the body of the sonde. Magnetic fluctuation occurs at a rate proportional to the impeller rotation. This sine wave fluctuation is digitized in a microprocessor and converted (proportionally) to pulses that are transmitted to the surface.

The flowmeter should be run uphole and downhole at different constant speeds to determine fluctuations due to water flows. A graphical presentation of the readings, as shown below, is useful in determining flow at a particular borehole depth. Stationary measurements may also be taken, if flow is sufficient, using time-based logs. The A015 sonde will typically respond to flows down to 2 to 3 metres per minute.

APPLICATIONS

 Flowmeter sondes are used to measure fluid flow rates within cased or open wells. Uses include:

  • Determination of well production
  • Injection and production profiling
  • Casing hole location

    Factors affecting flowmeter results include:

  • Well condition
  • Logging Speed
  • Fluid Viscosity
  • Borehole tilt
  • Well debris impairing impeller motion
  • Flow profile (turbulent flow near walls)
  • Turbulence
  • Sonde centralization
  • Impeller bearing friction




    Specifications

    Detector SensorImpellor
    Range1-300 rev/min
    Calibration rates.Via logging Speeds or pump
    Units of measuremeters per minute
    CommunicationPulse
    Nominal Current40
    Power at Sonde (VDC)28
    Pressure Rating (KPg/PSI)21000/3000
    Temp Rating (Degrees C)0-60
    Diameter (mm)43
    Length (mm)660
    Weight (Kg)3.5

    Auslog