Drilling Fluids

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The Electrical Stability (ES) of an oil-based drilling fluid is a property related to its emulsion stability and oil wetting ability. The OFITE Emulsion Stability Tester determines ES by applying a precision voltage-ramped sinusoidal signal across a pair of parallel flat plate electrodes that are immersed in the fluid.

Features

  • API recommended sinewave circuitry
  • Symmetry of the sinusoidal signal inhibits the buildup of solids on the electrode faces and enhances reproducibility.
  • Push button automatic voltage ramping at a fixed ramp rate
  • Includes meter, probe electrode, calibration standards, and four 9-volt alkaline batteries

Specifications

Meter

  • Wave form: Sine, < 5% total harmonic distortion
  • AC Frequency: 340 ± 10 Hz
  • Output Units: Peak Volts
  • Ramp Rate: 150 ± 10 Volts per second, automatic operation
  • Minimum Output Range: 3 - 2,000 Volts (Peak)
  • Trip Current: 61 ± 5 µA
  • Size: 9.5” × 6.5” × 3.5” (24.1 × 16.5 × 8.9 cm)
  • Weight: 2 lb 15 oz. (1.3 kg)
  • Shipping Size: 11” × 11” × 7” (28 × 28 × 18 cm)
  • Shipping Weight: 10 lb (4.54 kg)

Electrode

  • Housing: Material resistant to oil mud components up to 220°F (105°C)
  • Material: Corrosion-resistant metal
  • Diameter: 0.125” ± 0.001” (3.18 ± 0.03 mm)
  • Spacing (gap): 0.061” ± 0.001” (1.55 ± 0.03 mm) at 72°F (22°C)

Components

  • #131-01: Probe
  • #131-51: Calibration Standards, High and Low
  • #147-02: Battery, 9 Volt, Alkaline

Optional

  • #131-50-SP: Spare Parts Kit
  • #154-01: Thermometer, 5” Stem, Metal Dial, 0° - 220°F (-10° - 100°C)
  • #154-22: Thermometer, Pocket, 5” Stem, 1” Dial, 0° - 220°F

Part Number

  • #131-50