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. The latest addition to the family of WellWatcher systems is the WellWatcher eQuartz ESP-immune high-temperature, high-resolution PT gauge, which has a life of 10 years at maximum pressure and up to 204 degC [400 degF].

WellWatcher Permanent Monitoring System Gauge Specifications
Gauge System Max. Working
psi [MPa]
Max. Working
degC [degF]
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]
WellWatcher Quartz Extend
20,000 [138]
150 [302]
WellWatcher TruOptic 20,000 [138] 250 [482] 4
WellWatcher eQuartz 25,000 [172] 200 [390] 8 dual sensor
FloWatcher monitoring system 25,000 [172] 175 [347] na

Rating for AC version of gauge; DC version rated 16,000 psi [110 MPa].
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

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Pressure and Temperature Ratings for WellWatcher System Downhole Gauges

Pressure and Temperature Ratings for WellWatcher Permanent Monitoring Systems Downhole Gauges
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