DataCan's Geothermal pressure gauge is a flask-covered downhole memory pressure and a temperature gauge that can be expanded to include flow, casing collar locator (CCL), and gamma-ray detection.
The flask design insulates the internal sensors and circuits from the extreme heat in a geothermal or steam injection well. The flask allows a standard 350degF tool and sensor to be able to withstand extreme temperatures for a number of hours. Depending on the design of the flask (the OD, length, and heatsink) geothermal measurement tools can be designed to withstand temperatures up to 600degF or 400degC.
• Up to 300°C for 8 hours
• Thermally insulates your downhole electronics
• External fast response temperature sensor
• Internal pressure measurement
• Can be expanded to measure flow and add a casing collar locator
A geothermal tool has a large Dewar flask housing that insulates the internal, temperature sensitive components. As well as the insulating housing, the tool assembly has a large internal heat sink assembly. The insulation, and the internal heat sink work together to prevent and absorb heat energy. This allows the internal electronics to stay below their critical operating temperatures.
The following graph illustrates the geothermal tools performance at different external temperatures.