Functionality
The tool is developed from the tried and tested ESR and GSR tools and has been designed to provide years of reliable service by utilising metal to metal C-rings throughout. Deployment of the tool is via a standard hepta cable and uses a double booted cable head with a Krytox oil fill to ensure long term integrity.
In digital mode the tools can be combined to a maximum of 60 levels with 100m spacing between levels. The tool utilises Avalon’s unique Active Cooling System (ACS), this maintains a constant 45°C differential between the borehole fluid and the tool’s electronic system. This dramatically improves not only long term reliability, but also allows operation to 180°C for weeks at a time.
The PSR can also be provided in single or dual tool analogue mode to allow even higher operating temperatures. Analogue tools are available in 200°C and 225°C versions.
The PSR comes with a three component sensor pack as standard which can be upgraded from one omnidirectional geophone per axis to four highly sensitive geophones per axis and with the further option of a state of the art active sensor pack (currently under development). These sensor packs will work in any orientation and, when using a multi-sensor per component devices, will deliver the required sensitivities with minimal noise for detecting the full microseismic wavefield.
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