Schlumberger

Electrical Permanent Downhole Gauge Systems

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Advanced pressure, temperature, density, and flow rate measurements

As many as 30 WellWatcher permanent monitoring systems can be connected to a single cable, and they include a wide range of downhole electrical gauges and associated systems for point measurements of pressure, temperature, flow rate, and fluid density.

WellWatcher Permanent Monitoring System Gauge Specifications
Gauge System Max. Working
Pressure,
psi [MPa]
Max. Working
Temperature,
degC [degF]
Max.
Gauges
per Cable
WellWatcher Sapphire   10,000 [69] 110 [230] 6
WellWatcher Quartz LT
10,000 [69]
130 [266]  6
WellWatcher Quartz 10,000 [69]
16,000 [110]
25,000 [172]
30,000 [207]
180 [356]
180 [356]
180 [356]
180 [356]
8
8
8
8
WellWatcher Extend
16,000 [110]
150 [302]
30
WellWatcher Remote 
10,000 [69]
110 [230]
16
FloWatcher monitoring system 25,000 [172] 175 [347] na

Not applicable

These gauges incorporate the most recent innovations in quartz and sapphire transducers, fully welded assemblies, corrosion-resistant alloys, and robust electronic components. Advanced cable head connector technology and the single permanent communication-and-power cable enhance reliability at the system level. Gauge performance is validated in a controlled test cell, where drift stability is measured at simulated reservoir pressure and temperature.

FloWatcher Flow Rate, Fluid Density & PT Monitoring System

WellWatcher Remote Battery-Powered PT Monitoring System

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