When used in digital mode, the GeochainTM employs the TAS-2 telemetry adapter section and VRS-1 Voltage regulator section at the top and bottom of the tool string respectively. The ASR-1 HP downhole satellites are populated with the distributed electronic modules, which feature 24 bit Delta-Sigma converters for maximum dynamic range along with real time data transmission and display. Constant synchronisation of the string allows for very long record lengths.
Our latest unique active cooling system (ACS) allows continuous operation up to 385°F/195°C within a hermetically sealed environment, and the robust telemetry system will ensure operation in the harshest conditions.
Up to 62 satellites can be used in the array, with a maximum tool spacing of >600 feet (200m).
Surface Control Microseismic Mode
The digital GeochainSlimTM
system is supplied an operating current at surface via a Geochain Power Panel (GPP)
. This features a Wireline Interface Box (WIB), enabling both DC power and AC data to be transmitted over same wireline cable. From 2016 this panel will be replaced by the upgraded Geochain Monitor Panel (GMP). The entire system is controlled by a Geochain System Panel (GSP-1)
which currently operates with a standard digital seismic interface and up to 16 analogue channels. The panel has a 1.536Mb digital interface with 24 bit delta sigma converters and a built in firing circuit. The GSP runs the standard ASL Acquisition suite
Digital GeochainTM systems can now be combined with a Downhole Formatting Unit (DFU) for passive monitoring operation to double the number of satellites in a string at a given sample rate. These can record continuously (gapless) at the highest sample rate for maximum picking accuracy and recording bandwidth.Bypass Mode
The latest user friendly interface for the seismic engineer. The new ‘Bypass’ mode in the software enables data recovery from all active receivers, preventing any individual satellite failures from compromising the survey. Any down tools can be bypassed, allowing communication and instruction to all tools below.Mix & Match Operation
To help economize and maximize the output of your downhole itinerary, GeochainSlim Recievers (GSR) tools can now be deployed below Geochain ASR tools within the same string.