Permanent Monitoring
Piezo Sensor
This Canada Tech permanent monitoring tool is a downhole gauge measuring pressure and temperature with real-time surface readout.
It can be attached to the tubing string and lowered into a well on the end of a single conductor cable. or can also be suspended in the well on a tubewire. Once connected, pressure and temperature data is continuously transmitted to the surface for data collection and real-time readout.
Piezo Sensor Specifications
| Pressure | |
|---|---|
| Maximum differential pressure |
Hastelloy: 15 ksi SS 316: 10 ksi |
| Sensor type | Piezo-resistive |
| Accuracy | ±0.050% full scale |
| Long term stability | 0.1% full scale |
| Drift | < 3 psi per year |
| Resolution | 0.0003% full scale |
| Temperature | |
| Maximum temperature | 150°C |
| Accuracy | ± 1.0°C |
| Repeatability | ± 0.2°C |
| Resolution | 0.0001% full scale |
| Power | |
| Source | Downhole Telemetry Unit |
| Operating Voltage | 12 to 24 VDC |
| Current |
4 mA continuous 10 mA while sampling |
| Data Collection | |
| Data elements | Pressure, temperature |
| Sampling interval | 1.67 seconds |
| LCD display frequency | Flashes its last sampled value once each second |
| Downhole communication | PSK |
| Surface communications | Via DINLine system |